about summary refs log blame commit diff stats
path: root/html/073wait.cc.html
blob: 8abb58f7f044a5e168d14620acbca4f124e53ea8 (plain) (tree)
1
2
3
4
5
6
7
8
9
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662



                                                                                          
                              

                                                
                                  
                                                                                                               
                                           

                       
                                                                                                 
                                                                                            

                                      
                            
                             
                             
                            
                              
                           
                                  
                                                                           
                           
                               
                                   

        



                               






















                                                                                 

         
       
                             
                         
























































































































































































































































































































































































































































































































































































































                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       


       
                                     
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Mu - 073wait.cc</title>
<meta name="Generator" content="Vim/7.4">
<meta name="plugin-version" content="vim7.4_v2">
<meta name="syntax" content="cpp">
<meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
<meta name="colorscheme" content="minimal">
<style type="text/css">
<!--
pre { white-space: pre-wrap; font-family: monospace; color: #eeeeee; background-color: #080808; }
body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color: #080808; }
* { font-size: 12pt; font-size: 1em; }
.Constant { color: #00a0a0; }
.Special { color: #c00000; }
.muRecipe { color: #ff8700; }
.cSpecial { color: #008000; }
.Comment { color: #9090ff; }
.Delimiter { color: #800080; }
.LineNr { color: #444444; }
.traceContains { color: #008000; }
.Normal { color: #eeeeee; background-color: #080808; padding-bottom: 1px; }
.muData { color: #ffff00; }
.Identifier { color: #c0a020; }
.SalientComment { color: #00ffff; }
-->
</style>

<script type='text/javascript'>
<!--

/* function to open any folds containing a jumped-to line before jumping to it */
function JumpToLine()
{
  var lineNum;
  lineNum = window.location.hash;
  lineNum = lineNum.substr(1); /* strip off '#' */

  if (lineNum.indexOf('L') == -1) {
    lineNum = 'L'+lineNum;
  }
  lineElem = document.getElementById(lineNum);
  /* Always jump to new location even if the line was hidden inside a fold, or
   * we corrected the raw number to a line ID.
   */
  if (lineElem) {
    lineElem.scrollIntoView(true);
  }
  return true;
}
if ('onhashchange' in window) {
  window.onhashchange = JumpToLine;
}

-->
</script>
</head>
<body onload='JumpToLine();'>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr">  1 </span><span class="Comment">//: Routines can be put in a 'waiting' state, from which it will be ready to</span>
<span id="L2" class="LineNr">  2 </span><span class="Comment">//: run again when a specific memory location changes its value. This is Mu's</span>
<span id="L3" class="LineNr">  3 </span><span class="Comment">//: basic technique for orchestrating the order in which different routines</span>
<span id="L4" class="LineNr">  4 </span><span class="Comment">//: operate.</span>
<span id="L5" class="LineNr">  5 </span>
<span id="L6" class="LineNr">  6 </span><span class="Delimiter">:(scenario wait_for_location)</span>
<span id="L7" class="LineNr">  7 </span><span class="muRecipe">def</span> f1 [
<span id="L8" class="LineNr">  8 </span>  <span class="Constant">10</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
<span id="L9" class="LineNr">  9 </span>  start-running f2
<span id="L10" class="LineNr"> 10 </span>  <span class="Constant">20</span>:location<span class="Special"> &lt;- </span>copy <span class="Constant">10</span>/unsafe
<span id="L11" class="LineNr"> 11 </span>  wait-<span class="Normal">for</span>-reset-then-set <span class="Constant">20</span>:location
<span id="L12" class="LineNr"> 12 </span>  <span class="Comment"># wait for f2 to run and reset location 1</span>
<span id="L13" class="LineNr"> 13 </span>  <span class="Constant">30</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">10</span>:num
<span id="L14" class="LineNr"> 14 </span>]
<span id="L15" class="LineNr"> 15 </span><span class="muRecipe">def</span> f2 [
<span id="L16" class="LineNr"> 16 </span>  <span class="Constant">10</span>:location<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>/unsafe
<span id="L17" class="LineNr"> 17 </span>]
<span id="L18" class="LineNr"> 18 </span><span class="traceContains">+schedule: f1</span>
<span id="L19" class="LineNr"> 19 </span><span class="traceContains">+run: waiting for location 10 to reset</span>
<span id="L20" class="LineNr"> 20 </span><span class="traceContains">+schedule: f2</span>
<span id="L21" class="LineNr"> 21 </span><span class="traceContains">+schedule: waking up routine 1</span>
<span id="L22" class="LineNr"> 22 </span><span class="traceContains">+schedule: f1</span>
<span id="L23" class="LineNr"> 23 </span><span class="traceContains">+mem: storing 1 in location 30</span>
<span id="L24" class="LineNr"> 24 </span>
<span id="L25" class="LineNr"> 25 </span><span class="Comment">//: define the new state that all routines can be in</span>
<span id="L26" class="LineNr"> 26 </span>
<span id="L27" class="LineNr"> 27 </span><span class="Delimiter">:(before &quot;End routine States&quot;)</span>
<span id="L28" class="LineNr"> 28 </span>WAITING<span class="Delimiter">,</span>
<span id="L29" class="LineNr"> 29 </span><span class="Delimiter">:(before &quot;End routine Fields&quot;)</span>
<span id="L30" class="LineNr"> 30 </span><span class="Comment">// only if state == WAITING</span>
<span id="L31" class="LineNr"> 31 </span><span class="Normal">int</span> waiting_on_location<span class="Delimiter">;</span>
<span id="L32" class="LineNr"> 32 </span><span class="Delimiter">:(before &quot;End routine Constructor&quot;)</span>
<span id="L33" class="LineNr"> 33 </span>waiting_on_location = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L34" class="LineNr"> 34 </span>
<span id="L35" class="LineNr"> 35 </span><span class="Delimiter">:(before &quot;End Mu Test Teardown&quot;)</span>
<span id="L36" class="LineNr"> 36 </span><span class="Normal">if</span> <span class="Delimiter">(</span>Passed &amp;&amp; any_routines_waiting<span class="Delimiter">())</span>
<span id="L37" class="LineNr"> 37 </span>  raise &lt;&lt; Current_scenario<span class="Delimiter">-&gt;</span>name &lt;&lt; <span class="Constant">&quot;: deadlock!</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L38" class="LineNr"> 38 </span><span class="Delimiter">:(before &quot;End Run Routine&quot;)</span>
<span id="L39" class="LineNr"> 39 </span><span class="Normal">if</span> <span class="Delimiter">(</span>any_routines_waiting<span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span id="L40" class="LineNr"> 40 </span>  raise &lt;&lt; <span class="Constant">&quot;deadlock!</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L41" class="LineNr"> 41 </span>  dump_waiting_routines<span class="Delimiter">();</span>
<span id="L42" class="LineNr"> 42 </span><span class="Delimiter">}</span>
<span id="L43" class="LineNr"> 43 </span><span class="Delimiter">:(before &quot;End Test Teardown&quot;)</span>
<span id="L44" class="LineNr"> 44 </span><span class="Normal">if</span> <span class="Delimiter">(</span>Passed &amp;&amp; any_routines_with_error<span class="Delimiter">())</span>
<span id="L45" class="LineNr"> 45 </span>  raise &lt;&lt; <span class="Constant">&quot;some routines died with errors</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L46" class="LineNr"> 46 </span><span class="Delimiter">:(code)</span>
<span id="L47" class="LineNr"> 47 </span><span class="Normal">bool</span> any_routines_waiting<span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L48" class="LineNr"> 48 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>Routines<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L49" class="LineNr"> 49 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-&gt;</span>state == WAITING<span class="Delimiter">)</span>
<span id="L50" class="LineNr"> 50 </span>      <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span id="L51" class="LineNr"> 51 </span>  <span class="Delimiter">}</span>
<span id="L52" class="LineNr"> 52 </span>  <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span id="L53" class="LineNr"> 53 </span><span class="Delimiter">}</span>
<span id="L54" class="LineNr"> 54 </span><span class="Normal">void</span> dump_waiting_routines<span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L55" class="LineNr"> 55 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>Routines<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L56" class="LineNr"> 56 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-&gt;</span>state == WAITING<span class="Delimiter">)</span>
<span id="L57" class="LineNr"> 57 </span>      cerr &lt;&lt; i &lt;&lt; <span class="Constant">&quot;: &quot;</span> &lt;&lt; routine_label<span class="Delimiter">(</span>Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))</span> &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span id="L58" class="LineNr"> 58 </span>  <span class="Delimiter">}</span>
<span id="L59" class="LineNr"> 59 </span><span class="Delimiter">}</span>
<span id="L60" class="LineNr"> 60 </span>
<span id="L61" class="LineNr"> 61 </span><span class="Delimiter">:(scenario wait_for_location_can_deadlock)</span>
<span id="L62" class="LineNr"> 62 </span><span class="Special">% Hide_errors = true;</span>
<span id="L63" class="LineNr"> 63 </span><span class="muRecipe">def</span> main [
<span id="L64" class="LineNr"> 64 </span>  <span class="Constant">10</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>
<span id="L65" class="LineNr"> 65 </span>  <span class="Constant">20</span>:location<span class="Special"> &lt;- </span>copy <span class="Constant">10</span>/unsafe
<span id="L66" class="LineNr"> 66 </span>  wait-<span class="Normal">for</span>-reset-then-set <span class="Constant">20</span>:location
<span id="L67" class="LineNr"> 67 </span>]
<span id="L68" class="LineNr"> 68 </span><span class="traceContains">+error: deadlock!</span>
<span id="L69" class="LineNr"> 69 </span>
<span id="L70" class="LineNr"> 70 </span><span class="Comment">//: Primitive recipe to put routines in that state.</span>
<span id="L71" class="LineNr"> 71 </span><span class="Comment">//: This primitive is also known elsewhere as compare-and-set (CAS). Used to</span>
<span id="L72" class="LineNr"> 72 </span><span class="Comment">//: build locks.</span>
<span id="L73" class="LineNr"> 73 </span>
<span id="L74" class="LineNr"> 74 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
<span id="L75" class="LineNr"> 75 </span>WAIT_FOR_RESET_THEN_SET<span class="Delimiter">,</span>
<span id="L76" class="LineNr"> 76 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
<span id="L77" class="LineNr"> 77 </span>put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;wait-for-reset-then-set&quot;</span><span class="Delimiter">,</span> WAIT_FOR_RESET_THEN_SET<span class="Delimiter">);</span>
<span id="L78" class="LineNr"> 78 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span id="L79" class="LineNr"> 79 </span><span class="Normal">case</span> WAIT_FOR_RESET_THEN_SET: <span class="Delimiter">{</span>
<span id="L80" class="LineNr"> 80 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L81" class="LineNr"> 81 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'wait-for-reset-then-set' requires exactly one ingredient, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L82" class="LineNr"> 82 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L83" class="LineNr"> 83 </span>  <span class="Delimiter">}</span>
<span id="L84" class="LineNr"> 84 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!is_mu_location<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> <span class="Delimiter">{</span>
<span id="L85" class="LineNr"> 85 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'wait-for-reset-then-set' requires a location ingredient, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L86" class="LineNr"> 86 </span>  <span class="Delimiter">}</span>
<span id="L87" class="LineNr"> 87 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L88" class="LineNr"> 88 </span><span class="Delimiter">}</span>
<span id="L89" class="LineNr"> 89 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span id="L90" class="LineNr"> 90 </span><span class="Normal">case</span> WAIT_FOR_RESET_THEN_SET: <span class="Delimiter">{</span>
<span id="L91" class="LineNr"> 91 </span>  <span class="Normal">int</span> loc = <span class="Normal">static_cast</span>&lt;<span class="Normal">int</span>&gt;<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">));</span>
<span id="L92" class="LineNr"> 92 </span>  trace<span class="Delimiter">(</span><span class="Constant">9998</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;wait: *&quot;</span> &lt;&lt; loc &lt;&lt; <span class="Constant">&quot; = &quot;</span> &lt;&lt; get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> loc<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L93" class="LineNr"> 93 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> loc<span class="Delimiter">)</span> == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L94" class="LineNr"> 94 </span>    trace<span class="Delimiter">(</span><span class="Constant">9998</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;location &quot;</span> &lt;&lt; loc &lt;&lt; <span class="Constant">&quot; is already 0; setting&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L95" class="LineNr"> 95 </span>    put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> loc<span class="Delimiter">,</span> <span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L96" class="LineNr"> 96 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L97" class="LineNr"> 97 </span>  <span class="Delimiter">}</span>
<span id="L98" class="LineNr"> 98 </span>  trace<span class="Delimiter">(</span><span class="Constant">9998</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;waiting for location &quot;</span> &lt;&lt; loc &lt;&lt; <span class="Constant">&quot; to reset&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L99" class="LineNr"> 99 </span>  Current_routine<span class="Delimiter">-&gt;</span>state = WAITING<span class="Delimiter">;</span>
<span id="L100" class="LineNr">100 </span>  Current_routine<span class="Delimiter">-&gt;</span>waiting_on_location = loc<span class="Delimiter">;</span>
<span id="L101" class="LineNr">101 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L102" class="LineNr">102 </span><span class="Delimiter">}</span>
<span id="L103" class="LineNr">103 </span>
<span id="L104" class="LineNr">104 </span><span class="Comment">//: Counterpart to unlock a lock.</span>
<span id="L105" class="LineNr">105 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
<span id="L106" class="LineNr">106 </span>RESET<span class="Delimiter">,</span>
<span id="L107" class="LineNr">107 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
<span id="L108" class="LineNr">108 </span>put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;reset&quot;</span><span class="Delimiter">,</span> RESET<span class="Delimiter">);</span>
<span id="L109" class="LineNr">109 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span id="L110" class="LineNr">110 </span><span class="Normal">case</span> RESET: <span class="Delimiter">{</span>
<span id="L111" class="LineNr">111 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L112" class="LineNr">112 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'reset' requires exactly one ingredient, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L113" class="LineNr">113 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L114" class="LineNr">114 </span>  <span class="Delimiter">}</span>
<span id="L115" class="LineNr">115 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!is_mu_location<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> <span class="Delimiter">{</span>
<span id="L116" class="LineNr">116 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'reset' requires a location ingredient, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L117" class="LineNr">117 </span>  <span class="Delimiter">}</span>
<span id="L118" class="LineNr">118 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L119" class="LineNr">119 </span><span class="Delimiter">}</span>
<span id="L120" class="LineNr">120 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span id="L121" class="LineNr">121 </span><span class="Normal">case</span> RESET: <span class="Delimiter">{</span>
<span id="L122" class="LineNr">122 </span>  <span class="Normal">int</span> loc = <span class="Normal">static_cast</span>&lt;<span class="Normal">int</span>&gt;<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">));</span>
<span id="L123" class="LineNr">123 </span>  put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> loc<span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">);</span>
<span id="L124" class="LineNr">124 </span>  trace<span class="Delimiter">(</span><span class="Constant">9998</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;reset: *&quot;</span> &lt;&lt; loc &lt;&lt; <span class="Constant">&quot; = &quot;</span> &lt;&lt; get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> loc<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L125" class="LineNr">125 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L126" class="LineNr">126 </span><span class="Delimiter">}</span>
<span id="L127" class="LineNr">127 </span>
<span id="L128" class="LineNr">128 </span><span class="Comment">//: scheduler tweak to get routines out of that state</span>
<span id="L129" class="LineNr">129 </span>
<span id="L130" class="LineNr">130 </span><span class="Delimiter">:(before &quot;End Scheduler State Transitions&quot;)</span>
<span id="L131" class="LineNr">131 </span><span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>Routines<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L132" class="LineNr">132 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-&gt;</span>state != WAITING<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L133" class="LineNr">133 </span>  <span class="Normal">int</span> loc = Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-&gt;</span>waiting_on_location<span class="Delimiter">;</span>
<span id="L134" class="LineNr">134 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>loc &amp;&amp; get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> loc<span class="Delimiter">)</span> == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L135" class="LineNr">135 </span>    trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">&quot;schedule&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;waking up routine &quot;</span> &lt;&lt; Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-&gt;</span>id &lt;&lt; end<span class="Delimiter">();</span>
<span id="L136" class="LineNr">136 </span>    put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> loc<span class="Delimiter">,</span> <span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L137" class="LineNr">137 </span>    Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-&gt;</span>state = RUNNING<span class="Delimiter">;</span>
<span id="L138" class="LineNr">138 </span>    Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-&gt;</span>waiting_on_location = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L139" class="LineNr">139 </span>  <span class="Delimiter">}</span>
<span id="L140" class="LineNr">140 </span><span class="Delimiter">}</span>
<span id="L141" class="LineNr">141 </span>
<span id="L142" class="LineNr">142 </span><span class="Comment">//: Primitive to help compute locations to wait on.</span>
<span id="L143" class="LineNr">143 </span><span class="Comment">//: Only supports elements immediately inside containers; no arrays or</span>
<span id="L144" class="LineNr">144 </span><span class="Comment">//: containers within containers yet.</span>
<span id="L145" class="LineNr">145 </span>
<span id="L146" class="LineNr">146 </span><span class="Delimiter">:(scenario get_location)</span>
<span id="L147" class="LineNr">147 </span><span class="muRecipe">def</span> main [
<span id="L148" class="LineNr">148 </span>  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
<span id="L149" class="LineNr">149 </span>  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
<span id="L150" class="LineNr">150 </span>  <span class="Constant">15</span>:location<span class="Special"> &lt;- </span>get-location <span class="Constant">12</span>:point<span class="Delimiter">,</span> <span class="Constant">1:offset</span>
<span id="L151" class="LineNr">151 </span>]
<span id="L152" class="LineNr">152 </span><span class="traceContains">+mem: storing 13 in location 15</span>
<span id="L153" class="LineNr">153 </span>
<span id="L154" class="LineNr">154 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
<span id="L155" class="LineNr">155 </span>GET_LOCATION<span class="Delimiter">,</span>
<span id="L156" class="LineNr">156 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
<span id="L157" class="LineNr">157 </span>put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;get-location&quot;</span><span class="Delimiter">,</span> GET_LOCATION<span class="Delimiter">);</span>
<span id="L158" class="LineNr">158 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span id="L159" class="LineNr">159 </span><span class="Normal">case</span> GET_LOCATION: <span class="Delimiter">{</span>
<span id="L160" class="LineNr">160 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">2</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L161" class="LineNr">161 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'get-location' expects exactly 2 ingredients in '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L162" class="LineNr">162 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L163" class="LineNr">163 </span>  <span class="Delimiter">}</span>
<span id="L164" class="LineNr">164 </span>  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> base = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
<span id="L165" class="LineNr">165 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!canonize_type<span class="Delimiter">(</span>base<span class="Delimiter">))</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L166" class="LineNr">166 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!base<span class="Delimiter">.</span>type<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L167" class="LineNr">167 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;first ingredient of 'get-location' should be a container, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L168" class="LineNr">168 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L169" class="LineNr">169 </span>  <span class="Delimiter">}</span>
<span id="L170" class="LineNr">170 </span>  <span class="Normal">const</span> type_tree* base_root_type = base<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>atom ? base<span class="Delimiter">.</span>type : base<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">;</span>
<span id="L171" class="LineNr">171 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!base_root_type<span class="Delimiter">-&gt;</span>atom || base_root_type<span class="Delimiter">-&gt;</span>value == <span class="Constant">0</span> || !contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_root_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">)</span> || get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_root_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>kind != CONTAINER<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L172" class="LineNr">172 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;first ingredient of 'get-location' should be a container, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L173" class="LineNr">173 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L174" class="LineNr">174 </span>  <span class="Delimiter">}</span>
<span id="L175" class="LineNr">175 </span>  type_ordinal base_type = base<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">;</span>
<span id="L176" class="LineNr">176 </span>  <span class="Normal">const</span> reagent&amp; offset = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L177" class="LineNr">177 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!is_literal<span class="Delimiter">(</span>offset<span class="Delimiter">)</span> || !is_mu_scalar<span class="Delimiter">(</span>offset<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L178" class="LineNr">178 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;second ingredient of 'get-location' should have type 'offset', but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L179" class="LineNr">179 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L180" class="LineNr">180 </span>  <span class="Delimiter">}</span>
<span id="L181" class="LineNr">181 </span>  <span class="Normal">int</span> offset_value = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L182" class="LineNr">182 </span>  <span class="Comment">//: later layers will permit non-integer offsets</span>
<span id="L183" class="LineNr">183 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>is_integer<span class="Delimiter">(</span>offset<span class="Delimiter">.</span>name<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L184" class="LineNr">184 </span>    offset_value = to_integer<span class="Delimiter">(</span>offset<span class="Delimiter">.</span>name<span class="Delimiter">);</span>
<span id="L185" class="LineNr">185 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>offset_value &lt; <span class="Constant">0</span> || offset_value &gt;= SIZE<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">).</span>elements<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L186" class="LineNr">186 </span>      raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;invalid offset &quot;</span> &lt;&lt; offset_value &lt;&lt; <span class="Constant">&quot; for '&quot;</span> &lt;&lt; get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">).</span>name &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L187" class="LineNr">187 </span>      <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L188" class="LineNr">188 </span>    <span class="Delimiter">}</span>
<span id="L189" class="LineNr">189 </span>  <span class="Delimiter">}</span>
<span id="L190" class="LineNr">190 </span>  <span class="Normal">else</span> <span class="Delimiter">{</span>
<span id="L191" class="LineNr">191 </span>    offset_value = offset<span class="Delimiter">.</span>value<span class="Delimiter">;</span>
<span id="L192" class="LineNr">192 </span>  <span class="Delimiter">}</span>
<span id="L193" class="LineNr">193 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L194" class="LineNr">194 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!is_mu_location<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> <span class="Delimiter">{</span>
<span id="L195" class="LineNr">195 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'get-location &quot;</span> &lt;&lt; base<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;, &quot;</span> &lt;&lt; offset<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;' should write to type location but '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name &lt;&lt; <span class="Constant">&quot;' has type '&quot;</span> &lt;&lt; names_to_string_without_quotes<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>type<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L196" class="LineNr">196 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L197" class="LineNr">197 </span>  <span class="Delimiter">}</span>
<span id="L198" class="LineNr">198 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L199" class="LineNr">199 </span><span class="Delimiter">}</span>
<span id="L200" class="LineNr">200 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span id="L201" class="LineNr">201 </span><span class="Normal">case</span> GET_LOCATION: <span class="Delimiter">{</span>
<span id="L202" class="LineNr">202 </span>  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> base = current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
<span id="L203" class="LineNr">203 </span>  canonize<span class="Delimiter">(</span>base<span class="Delimiter">);</span>
<span id="L204" class="LineNr">204 </span>  <span class="Normal">int</span> base_address = base<span class="Delimiter">.</span>value<span class="Delimiter">;</span>
<span id="L205" class="LineNr">205 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>base_address == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L206" class="LineNr">206 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;tried to access location 0 in '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L207" class="LineNr">207 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L208" class="LineNr">208 </span>  <span class="Delimiter">}</span>
<span id="L209" class="LineNr">209 </span>  <span class="Normal">const</span> type_tree* base_type = get_base_type<span class="Delimiter">(</span>base<span class="Delimiter">.</span>type<span class="Delimiter">);</span>
<span id="L210" class="LineNr">210 </span>  <span class="Normal">int</span> offset = ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
<span id="L211" class="LineNr">211 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>offset &lt; <span class="Constant">0</span> || offset &gt;= SIZE<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>elements<span class="Delimiter">))</span> <span class="Identifier">break</span><span class="Delimiter">;</span>  <span class="Comment">// copied from Check above</span>
<span id="L212" class="LineNr">212 </span>  <span class="Normal">int</span> result = base_address<span class="Delimiter">;</span>
<span id="L213" class="LineNr">213 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; offset<span class="Delimiter">;</span>  ++i<span class="Delimiter">)</span>
<span id="L214" class="LineNr">214 </span>    result += size_of<span class="Delimiter">(</span>element_type<span class="Delimiter">(</span>base<span class="Delimiter">.</span>type<span class="Delimiter">,</span> i<span class="Delimiter">));</span>
<span id="L215" class="LineNr">215 </span>  trace<span class="Delimiter">(</span><span class="Constant">9998</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;address to copy is &quot;</span> &lt;&lt; result &lt;&lt; end<span class="Delimiter">();</span>
<span id="L216" class="LineNr">216 </span>  products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L217" class="LineNr">217 </span>  products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>result<span class="Delimiter">);</span>
<span id="L218" class="LineNr">218 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L219" class="LineNr">219 </span><span class="Delimiter">}</span>
<span id="L220" class="LineNr">220 </span>
<span id="L221" class="LineNr">221 </span><span class="Delimiter">:(code)</span>
<span id="L222" class="LineNr">222 </span><span class="Normal">bool</span> is_mu_location<span class="Delimiter">(</span>reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> x<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L223" class="LineNr">223 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!canonize_type<span class="Delimiter">(</span>x<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span id="L224" class="LineNr">224 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!x<span class="Delimiter">.</span>type<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span id="L225" class="LineNr">225 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!x<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span id="L226" class="LineNr">226 </span>  <span class="Identifier">return</span> x<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>value == get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;location&quot;</span><span class="Delimiter">);</span>
<span id="L227" class="LineNr">227 </span><span class="Delimiter">}</span>
<span id="L228" class="LineNr">228 </span>
<span id="L229" class="LineNr">229 </span><span class="Delimiter">:(scenario get_location_out_of_bounds)</span>
<span id="L230" class="LineNr">230 </span><span class="Special">% Hide_errors = true;</span>
<span id="L231" class="LineNr">231 </span><span class="muRecipe">def</span> main [
<span id="L232" class="LineNr">232 </span>  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
<span id="L233" class="LineNr">233 </span>  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
<span id="L234" class="LineNr">234 </span>  <span class="Constant">14</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
<span id="L235" class="LineNr">235 </span>  get-location <span class="Constant">12</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">2:offset</span>  <span class="Comment"># point-number occupies 3 locations but has only 2 fields; out of bounds</span>
<span id="L236" class="LineNr">236 </span>]
<span id="L237" class="LineNr">237 </span><span class="traceContains">+error: main: invalid offset 2 for 'point-number'</span>
<span id="L238" class="LineNr">238 </span>
<span id="L239" class="LineNr">239 </span><span class="Delimiter">:(scenario get_location_out_of_bounds_2)</span>
<span id="L240" class="LineNr">240 </span><span class="Special">% Hide_errors = true;</span>
<span id="L241" class="LineNr">241 </span><span class="muRecipe">def</span> main [
<span id="L242" class="LineNr">242 </span>  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
<span id="L243" class="LineNr">243 </span>  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
<span id="L244" class="LineNr">244 </span>  <span class="Constant">14</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
<span id="L245" class="LineNr">245 </span>  get-location <span class="Constant">12</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">-1:offset</span>
<span id="L246" class="LineNr">246 </span>]
<span id="L247" class="LineNr">247 </span><span class="traceContains">+error: main: invalid offset -1 for 'point-number'</span>
<span id="L248" class="LineNr">248 </span>
<span id="L249" class="LineNr">249 </span><span class="Delimiter">:(scenario get_location_product_type_mismatch)</span>
<span id="L250" class="LineNr">250 </span><span class="Special">% Hide_errors = true;</span>
<span id="L251" class="LineNr">251 </span><span class="muData">container</span> boolbool [
<span id="L252" class="LineNr">252 </span>  <span class="Normal">x</span>:<span class="Normal">bool</span>
<span id="L253" class="LineNr">253 </span>  <span class="Normal">y</span>:<span class="Normal">bool</span>
<span id="L254" class="LineNr">254 </span>]
<span id="L255" class="LineNr">255 </span><span class="muRecipe">def</span> main [
<span id="L256" class="LineNr">256 </span>  <span class="Constant">12</span>:<span class="Normal">bool</span><span class="Special"> &lt;- </span>copy <span class="Constant">1</span>
<span id="L257" class="LineNr">257 </span>  <span class="Constant">13</span>:<span class="Normal">bool</span><span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
<span id="L258" class="LineNr">258 </span>  <span class="Constant">15</span>:<span class="Normal">bool</span><span class="Special"> &lt;- </span>get-location <span class="Constant">12</span>:boolbool<span class="Delimiter">,</span> <span class="Constant">1:offset</span>
<span id="L259" class="LineNr">259 </span>]
<span id="L260" class="LineNr">260 </span><span class="traceContains">+error: main: 'get-location 12:boolbool, 1:offset' should write to type location but '15' has type 'boolean'</span>
<span id="L261" class="LineNr">261 </span>
<span id="L262" class="LineNr">262 </span><span class="Delimiter">:(scenario get_location_indirect)</span>
<span id="L263" class="LineNr">263 </span><span class="Comment"># 'get-location' can read from container address</span>
<span id="L264" class="LineNr">264 </span><span class="muRecipe">def</span> main [
<span id="L265" class="LineNr">265 </span>  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">10</span>
<span id="L266" class="LineNr">266 </span>  <span class="Comment"># 10 reserved for refcount</span>
<span id="L267" class="LineNr">267 </span>  <span class="Constant">11</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
<span id="L268" class="LineNr">268 </span>  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
<span id="L269" class="LineNr">269 </span>  <span class="Constant">4</span>:location<span class="Special"> &lt;- </span>get-location <span class="Constant">1</span>:&amp;:point/lookup<span class="Delimiter">,</span> <span class="Constant">0:offset</span>
<span id="L270" class="LineNr">270 </span>]
<span id="L271" class="LineNr">271 </span><span class="traceContains">+mem: storing 11 in location 4</span>
<span id="L272" class="LineNr">272 </span>
<span id="L273" class="LineNr">273 </span><span class="Delimiter">:(scenario get_location_indirect_2)</span>
<span id="L274" class="LineNr">274 </span><span class="muRecipe">def</span> main [
<span id="L275" class="LineNr">275 </span>  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">10</span>
<span id="L276" class="LineNr">276 </span>  <span class="Comment"># 10 reserved for refcount</span>
<span id="L277" class="LineNr">277 </span>  <span class="Constant">11</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
<span id="L278" class="LineNr">278 </span>  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
<span id="L279" class="LineNr">279 </span>  <span class="Constant">4</span>:&amp;:num<span class="Special"> &lt;- </span>copy <span class="Constant">20</span>/unsafe
<span id="L280" class="LineNr">280 </span>  <span class="Constant">4</span>:&amp;:location/lookup<span class="Special"> &lt;- </span>get-location <span class="Constant">1</span>:&amp;:point/lookup<span class="Delimiter">,</span> <span class="Constant">0:offset</span>
<span id="L281" class="LineNr">281 </span>]
<span id="L282" class="LineNr">282 </span><span class="traceContains">+mem: storing 11 in location 21</span>
<span id="L283" class="LineNr">283 </span>
<span id="L284" class="LineNr">284 </span><span class="Comment">//: allow waiting on a routine to complete</span>
<span id="L285" class="LineNr">285 </span>
<span id="L286" class="LineNr">286 </span><span class="Delimiter">:(scenario wait_for_routine)</span>
<span id="L287" class="LineNr">287 </span><span class="muRecipe">def</span> f1 [
<span id="L288" class="LineNr">288 </span>  <span class="Comment"># add a few routines to run</span>
<span id="L289" class="LineNr">289 </span>  <span class="Constant">1</span>:num/routine<span class="Special"> &lt;- </span>start-running f2
<span id="L290" class="LineNr">290 </span>  <span class="Constant">2</span>:num/routine<span class="Special"> &lt;- </span>start-running f3
<span id="L291" class="LineNr">291 </span>  wait-<span class="Normal">for</span>-routine <span class="Constant">1</span>:num/routine
<span id="L292" class="LineNr">292 </span>  <span class="Comment"># now wait for f2 to *complete* and modify location 13 before using its value</span>
<span id="L293" class="LineNr">293 </span>  <span class="Constant">20</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">13</span>:num
<span id="L294" class="LineNr">294 </span>]
<span id="L295" class="LineNr">295 </span><span class="muRecipe">def</span> f2 [
<span id="L296" class="LineNr">296 </span>  <span class="Constant">10</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>  <span class="Comment"># just padding</span>
<span id="L297" class="LineNr">297 </span>  <span class="Normal">switch</span>  <span class="Comment"># simulate a block; routine f1 shouldn't restart at this point</span>
<span id="L298" class="LineNr">298 </span>  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
<span id="L299" class="LineNr">299 </span>]
<span id="L300" class="LineNr">300 </span><span class="muRecipe">def</span> f3 [
<span id="L301" class="LineNr">301 </span>  <span class="Comment"># padding routine just to help simulate the block in f2 using 'switch'</span>
<span id="L302" class="LineNr">302 </span>  <span class="Constant">11</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
<span id="L303" class="LineNr">303 </span>  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
<span id="L304" class="LineNr">304 </span>]
<span id="L305" class="LineNr">305 </span><span class="traceContains">+schedule: f1</span>
<span id="L306" class="LineNr">306 </span><span class="traceContains">+run: waiting for routine 2</span>
<span id="L307" class="LineNr">307 </span><span class="traceContains">+schedule: f2</span>
<span id="L308" class="LineNr">308 </span><span class="traceContains">+schedule: f3</span>
<span id="L309" class="LineNr">309 </span><span class="traceContains">+schedule: f2</span>
<span id="L310" class="LineNr">310 </span><span class="traceContains">+schedule: waking up routine 1</span>
<span id="L311" class="LineNr">311 </span><span class="traceContains">+schedule: f1</span>
<span id="L312" class="LineNr">312 </span><span class="Comment"># if we got the synchronization wrong we'd be storing 0 in location 20</span>
<span id="L313" class="LineNr">313 </span><span class="traceContains">+mem: storing 34 in location 20</span>
<span id="L314" class="LineNr">314 </span>
<span id="L315" class="LineNr">315 </span><span class="Delimiter">:(before &quot;End routine Fields&quot;)</span>
<span id="L316" class="LineNr">316 </span><span class="Comment">// only if state == WAITING</span>
<span id="L317" class="LineNr">317 </span><span class="Normal">int</span> waiting_on_routine<span class="Delimiter">;</span>
<span id="L318" class="LineNr">318 </span><span class="Delimiter">:(before &quot;End routine Constructor&quot;)</span>
<span id="L319" class="LineNr">319 </span>waiting_on_routine = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L320" class="LineNr">320 </span>
<span id="L321" class="LineNr">321 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
<span id="L322" class="LineNr">322 </span>WAIT_FOR_ROUTINE<span class="Delimiter">,</span>
<span id="L323" class="LineNr">323 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
<span id="L324" class="LineNr">324 </span>put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;wait-for-routine&quot;</span><span class="Delimiter">,</span> WAIT_FOR_ROUTINE<span class="Delimiter">);</span>
<span id="L325" class="LineNr">325 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span id="L326" class="LineNr">326 </span><span class="Normal">case</span> WAIT_FOR_ROUTINE: <span class="Delimiter">{</span>
<span id="L327" class="LineNr">327 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L328" class="LineNr">328 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'wait-for-routine' requires exactly one ingredient, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L329" class="LineNr">329 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L330" class="LineNr">330 </span>  <span class="Delimiter">}</span>
<span id="L331" class="LineNr">331 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!is_mu_number<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> <span class="Delimiter">{</span>
<span id="L332" class="LineNr">332 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;first ingredient of 'wait-for-routine' should be a routine id generated by 'start-running', but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L333" class="LineNr">333 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L334" class="LineNr">334 </span>  <span class="Delimiter">}</span>
<span id="L335" class="LineNr">335 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L336" class="LineNr">336 </span><span class="Delimiter">}</span>
<span id="L337" class="LineNr">337 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span id="L338" class="LineNr">338 </span><span class="Normal">case</span> WAIT_FOR_ROUTINE: <span class="Delimiter">{</span>
<span id="L339" class="LineNr">339 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> == Current_routine<span class="Delimiter">-&gt;</span>id<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L340" class="LineNr">340 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;routine can't wait for itself! '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L341" class="LineNr">341 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L342" class="LineNr">342 </span>  <span class="Delimiter">}</span>
<span id="L343" class="LineNr">343 </span>  Current_routine<span class="Delimiter">-&gt;</span>state = WAITING<span class="Delimiter">;</span>
<span id="L344" class="LineNr">344 </span>  Current_routine<span class="Delimiter">-&gt;</span>waiting_on_routine = ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
<span id="L345" class="LineNr">345 </span>  trace<span class="Delimiter">(</span><span class="Constant">9998</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;waiting for routine &quot;</span> &lt;&lt; ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L346" class="LineNr">346 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L347" class="LineNr">347 </span><span class="Delimiter">}</span>
<span id="L348" class="LineNr">348 </span>
<span id="L349" class="LineNr">349 </span><span class="Delimiter">:(before &quot;End Scheduler State Transitions&quot;)</span>
<span id="L350" class="LineNr">350 </span><span class="Comment">// Wake up any routines waiting for other routines to complete.</span>
<span id="L351" class="LineNr">351 </span><span class="Comment">// Important: this must come after the scheduler loop above giving routines</span>
<span id="L352" class="LineNr">352 </span><span class="Comment">// waiting for locations to change a chance to wake up.</span>
<span id="L353" class="LineNr">353 </span><span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>Routines<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L354" class="LineNr">354 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-&gt;</span>state != WAITING<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L355" class="LineNr">355 </span>  routine* waiter = Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
<span id="L356" class="LineNr">356 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!waiter<span class="Delimiter">-&gt;</span>waiting_on_routine<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L357" class="LineNr">357 </span>  <span class="Normal">int</span> id = waiter<span class="Delimiter">-&gt;</span>waiting_on_routine<span class="Delimiter">;</span>
<span id="L358" class="LineNr">358 </span>  assert<span class="Delimiter">(</span>id != waiter<span class="Delimiter">-&gt;</span>id<span class="Delimiter">);</span>  <span class="Comment">// routine can't wait on itself</span>
<span id="L359" class="LineNr">359 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> j = <span class="Constant">0</span><span class="Delimiter">;</span>  j &lt; SIZE<span class="Delimiter">(</span>Routines<span class="Delimiter">);</span>  ++j<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L360" class="LineNr">360 </span>    <span class="Normal">const</span> routine* waitee = Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>j<span class="Delimiter">);</span>
<span id="L361" class="LineNr">361 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>waitee<span class="Delimiter">-&gt;</span>id == id &amp;&amp; waitee<span class="Delimiter">-&gt;</span>state != RUNNING &amp;&amp; waitee<span class="Delimiter">-&gt;</span>state != WAITING<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L362" class="LineNr">362 </span>      <span class="Comment">// routine is COMPLETED or DISCONTINUED</span>
<span id="L363" class="LineNr">363 </span>      trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">&quot;schedule&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;waking up routine &quot;</span> &lt;&lt; waiter<span class="Delimiter">-&gt;</span>id &lt;&lt; end<span class="Delimiter">();</span>
<span id="L364" class="LineNr">364 </span>      waiter<span class="Delimiter">-&gt;</span>state = RUNNING<span class="Delimiter">;</span>
<span id="L365" class="LineNr">365 </span>      waiter<span class="Delimiter">-&gt;</span>waiting_on_routine = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L366" class="LineNr">366 </span>    <span class="Delimiter">}</span>
<span id="L367" class="LineNr">367 </span>  <span class="Delimiter">}</span>
<span id="L368" class="LineNr">368 </span><span class="Delimiter">}</span>
<span id="L369" class="LineNr">369 </span>
<span id="L370" class="LineNr">370 </span><span class="Comment">//: yield voluntarily to let some other routine run</span>
<span id="L371" class="LineNr">371 </span>
<span id="L372" class="LineNr">372 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
<span id="L373" class="LineNr">373 </span>SWITCH<span class="Delimiter">,</span>
<span id="L374" class="LineNr">374 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
<span id="L375" class="LineNr">375 </span>put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;switch&quot;</span><span class="Delimiter">,</span> SWITCH<span class="Delimiter">);</span>
<span id="L376" class="LineNr">376 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span id="L377" class="LineNr">377 </span><span class="Normal">case</span> SWITCH: <span class="Delimiter">{</span>
<span id="L378" class="LineNr">378 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L379" class="LineNr">379 </span><span class="Delimiter">}</span>
<span id="L380" class="LineNr">380 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span id="L381" class="LineNr">381 </span><span class="Normal">case</span> SWITCH: <span class="Delimiter">{</span>
<span id="L382" class="LineNr">382 </span>  ++current_step_index<span class="Delimiter">();</span>
<span id="L383" class="LineNr">383 </span>  <span class="Identifier">goto</span> stop_running_current_routine<span class="Delimiter">;</span>
<span id="L384" class="LineNr">384 </span><span class="Delimiter">}</span>
<span id="L385" class="LineNr">385 </span>
<span id="L386" class="LineNr">386 </span><span class="Delimiter">:(scenario switch_preempts_current_routine)</span>
<span id="L387" class="LineNr">387 </span><span class="muRecipe">def</span> f1 [
<span id="L388" class="LineNr">388 </span>  start-running f2
<span id="L389" class="LineNr">389 </span>  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
<span id="L390" class="LineNr">390 </span>  <span class="Normal">switch</span>
<span id="L391" class="LineNr">391 </span>  <span class="Constant">3</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
<span id="L392" class="LineNr">392 </span>]
<span id="L393" class="LineNr">393 </span><span class="muRecipe">def</span> f2 [
<span id="L394" class="LineNr">394 </span>  <span class="Constant">2</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
<span id="L395" class="LineNr">395 </span>]
<span id="L396" class="LineNr">396 </span><span class="traceContains">+mem: storing 34 in location 1</span>
<span id="L397" class="LineNr">397 </span><span class="Comment"># context switch</span>
<span id="L398" class="LineNr">398 </span><span class="traceContains">+mem: storing 35 in location 2</span>
<span id="L399" class="LineNr">399 </span><span class="Comment"># back to original thread</span>
<span id="L400" class="LineNr">400 </span><span class="traceContains">+mem: storing 36 in location 3</span>
<span id="L401" class="LineNr">401 </span>
<span id="L402" class="LineNr">402 </span><span class="SalientComment">//:: helpers for manipulating routines in tests</span>
<span id="L403" class="LineNr">403 </span><span class="Comment">//:</span>
<span id="L404" class="LineNr">404 </span><span class="Comment">//: Managing arbitrary scenarios requires the ability to:</span>
<span id="L405" class="LineNr">405 </span><span class="Comment">//:   a) check if a routine is blocked</span>
<span id="L406" class="LineNr">406 </span><span class="Comment">//:   b) restart a blocked routine (`restart`)</span>
<span id="L407" class="LineNr">407 </span><span class="Comment">//:</span>
<span id="L408" class="LineNr">408 </span><span class="Comment">//: A routine is blocked either if it's waiting or if it explicitly signals</span>
<span id="L409" class="LineNr">409 </span><span class="Comment">//: that it's blocked (even as it periodically wakes up and polls for some</span>
<span id="L410" class="LineNr">410 </span><span class="Comment">//: event).</span>
<span id="L411" class="LineNr">411 </span><span class="Comment">//:</span>
<span id="L412" class="LineNr">412 </span><span class="Comment">//: Signalling blockedness might well be a huge hack. But Mu doesn't have Unix</span>
<span id="L413" class="LineNr">413 </span><span class="Comment">//: signals to avoid polling with, because signals are also pretty hacky.</span>
<span id="L414" class="LineNr">414 </span>
<span id="L415" class="LineNr">415 </span><span class="Delimiter">:(before &quot;End routine Fields&quot;)</span>
<span id="L416" class="LineNr">416 </span><span class="Normal">bool</span> blocked<span class="Delimiter">;</span>
<span id="L417" class="LineNr">417 </span><span class="Delimiter">:(before &quot;End routine Constructor&quot;)</span>
<span id="L418" class="LineNr">418 </span>blocked = <span class="Constant">false</span><span class="Delimiter">;</span>
<span id="L419" class="LineNr">419 </span>
<span id="L420" class="LineNr">420 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
<span id="L421" class="LineNr">421 </span>CURRENT_ROUTINE_IS_BLOCKED<span class="Delimiter">,</span>
<span id="L422" class="LineNr">422 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
<span id="L423" class="LineNr">423 </span>put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;current-routine-is-blocked&quot;</span><span class="Delimiter">,</span> CURRENT_ROUTINE_IS_BLOCKED<span class="Delimiter">);</span>
<span id="L424" class="LineNr">424 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span id="L425" class="LineNr">425 </span><span class="Normal">case</span> CURRENT_ROUTINE_IS_BLOCKED: <span class="Delimiter">{</span>
<span id="L426" class="LineNr">426 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span id="L427" class="LineNr">427 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'current-routine-is-blocked' should have no ingredients, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L428" class="LineNr">428 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L429" class="LineNr">429 </span>  <span class="Delimiter">}</span>
<span id="L430" class="LineNr">430 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L431" class="LineNr">431 </span><span class="Delimiter">}</span>
<span id="L432" class="LineNr">432 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span id="L433" class="LineNr">433 </span><span class="Normal">case</span> CURRENT_ROUTINE_IS_BLOCKED: <span class="Delimiter">{</span>
<span id="L434" class="LineNr">434 </span>  Current_routine<span class="Delimiter">-&gt;</span>blocked = <span class="Constant">true</span><span class="Delimiter">;</span>
<span id="L435" class="LineNr">435 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L436" class="LineNr">436 </span><span class="Delimiter">}</span>
<span id="L437" class="LineNr">437 </span>
<span id="L438" class="LineNr">438 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
<span id="L439" class="LineNr">439 </span>CURRENT_ROUTINE_IS_UNBLOCKED<span class="Delimiter">,</span>
<span id="L440" class="LineNr">440 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
<span id="L441" class="LineNr">441 </span>put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;current-routine-is-unblocked&quot;</span><span class="Delimiter">,</span> CURRENT_ROUTINE_IS_UNBLOCKED<span class="Delimiter">);</span>
<span id="L442" class="LineNr">442 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span id="L443" class="LineNr">443 </span><span class="Normal">case</span> CURRENT_ROUTINE_IS_UNBLOCKED: <span class="Delimiter">{</span>
<span id="L444" class="LineNr">444 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span id="L445" class="LineNr">445 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'current-routine-is-unblocked' should have no ingredients, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L446" class="LineNr">446 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L447" class="LineNr">447 </span>  <span class="Delimiter">}</span>
<span id="L448" class="LineNr">448 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L449" class="LineNr">449 </span><span class="Delimiter">}</span>
<span id="L450" class="LineNr">450 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span id="L451" class="LineNr">451 </span><span class="Normal">case</span> CURRENT_ROUTINE_IS_UNBLOCKED: <span class="Delimiter">{</span>
<span id="L452" class="LineNr">452 </span>  Current_routine<span class="Delimiter">-&gt;</span>blocked = <span class="Constant">false</span><span class="Delimiter">;</span>
<span id="L453" class="LineNr">453 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L454" class="LineNr">454 </span><span class="Delimiter">}</span>
<span id="L455" class="LineNr">455 </span>
<span id="L456" class="LineNr">456 </span><span class="Comment">//: also allow waiting on a routine to block</span>
<span id="L457" class="LineNr">457 </span><span class="Comment">//: (just for tests; use wait_for_routine above wherever possible)</span>
<span id="L458" class="LineNr">458 </span>
<span id="L459" class="LineNr">459 </span><span class="Delimiter">:(scenario wait_for_routine_to_block)</span>
<span id="L460" class="LineNr">460 </span><span class="muRecipe">def</span> f1 [
<span id="L461" class="LineNr">461 </span>  <span class="Constant">1</span>:num/routine<span class="Special"> &lt;- </span>start-running f2
<span id="L462" class="LineNr">462 </span>  wait-<span class="Normal">for</span>-routine-to-block <span class="Constant">1</span>:num/routine
<span id="L463" class="LineNr">463 </span>  <span class="Comment"># now wait for f2 to run and modify location 10 before using its value</span>
<span id="L464" class="LineNr">464 </span>  <span class="Constant">11</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">10</span>:num
<span id="L465" class="LineNr">465 </span>]
<span id="L466" class="LineNr">466 </span><span class="muRecipe">def</span> f2 [
<span id="L467" class="LineNr">467 </span>  <span class="Constant">10</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
<span id="L468" class="LineNr">468 </span>]
<span id="L469" class="LineNr">469 </span><span class="traceContains">+schedule: f1</span>
<span id="L470" class="LineNr">470 </span><span class="traceContains">+run: waiting for routine 2 to block</span>
<span id="L471" class="LineNr">471 </span><span class="traceContains">+schedule: f2</span>
<span id="L472" class="LineNr">472 </span><span class="traceContains">+schedule: waking up routine 1 because routine 2 is blocked</span>
<span id="L473" class="LineNr">473 </span><span class="traceContains">+schedule: f1</span>
<span id="L474" class="LineNr">474 </span><span class="Comment"># if we got the synchronization wrong we'd be storing 0 in location 11</span>
<span id="L475" class="LineNr">475 </span><span class="traceContains">+mem: storing 34 in location 11</span>
<span id="L476" class="LineNr">476 </span>
<span id="L477" class="LineNr">477 </span><span class="Delimiter">:(before &quot;End routine Fields&quot;)</span>
<span id="L478" class="LineNr">478 </span><span class="Comment">// only if state == WAITING</span>
<span id="L479" class="LineNr">479 </span><span class="Normal">int</span> waiting_on_routine_to_block<span class="Delimiter">;</span>
<span id="L480" class="LineNr">480 </span><span class="Delimiter">:(before &quot;End routine Constructor&quot;)</span>
<span id="L481" class="LineNr">481 </span>waiting_on_routine_to_block = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L482" class="LineNr">482 </span>
<span id="L483" class="LineNr">483 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
<span id="L484" class="LineNr">484 </span>WAIT_FOR_ROUTINE_TO_BLOCK<span class="Delimiter">,</span>
<span id="L485" class="LineNr">485 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
<span id="L486" class="LineNr">486 </span>put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;wait-for-routine-to-block&quot;</span><span class="Delimiter">,</span> WAIT_FOR_ROUTINE_TO_BLOCK<span class="Delimiter">);</span>
<span id="L487" class="LineNr">487 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span id="L488" class="LineNr">488 </span><span class="Normal">case</span> WAIT_FOR_ROUTINE_TO_BLOCK: <span class="Delimiter">{</span>
<span id="L489" class="LineNr">489 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L490" class="LineNr">490 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'wait-for-routine-to-block' requires exactly one ingredient, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L491" class="LineNr">491 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L492" class="LineNr">492 </span>  <span class="Delimiter">}</span>
<span id="L493" class="LineNr">493 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!is_mu_number<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> <span class="Delimiter">{</span>
<span id="L494" class="LineNr">494 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;first ingredient of 'wait-for-routine-to-block' should be a routine id generated by 'start-running', but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L495" class="LineNr">495 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L496" class="LineNr">496 </span>  <span class="Delimiter">}</span>
<span id="L497" class="LineNr">497 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L498" class="LineNr">498 </span><span class="Delimiter">}</span>
<span id="L499" class="LineNr">499 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span id="L500" class="LineNr">500 </span><span class="Normal">case</span> WAIT_FOR_ROUTINE_TO_BLOCK: <span class="Delimiter">{</span>
<span id="L501" class="LineNr">501 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> == Current_routine<span class="Delimiter">-&gt;</span>id<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L502" class="LineNr">502 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;routine can't wait for itself! '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L503" class="LineNr">503 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L504" class="LineNr">504 </span>  <span class="Delimiter">}</span>
<span id="L505" class="LineNr">505 </span>  Current_routine<span class="Delimiter">-&gt;</span>state = WAITING<span class="Delimiter">;</span>
<span id="L506" class="LineNr">506 </span>  Current_routine<span class="Delimiter">-&gt;</span>waiting_on_routine_to_block = ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
<span id="L507" class="LineNr">507 </span>  trace<span class="Delimiter">(</span><span class="Constant">9998</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;waiting for routine &quot;</span> &lt;&lt; ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot; to block&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L508" class="LineNr">508 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L509" class="LineNr">509 </span><span class="Delimiter">}</span>
<span id="L510" class="LineNr">510 </span>
<span id="L511" class="LineNr">511 </span><span class="Delimiter">:(before &quot;End Scheduler State Transitions&quot;)</span>
<span id="L512" class="LineNr">512 </span><span class="Comment">// Wake up any routines waiting for other routines to stop running.</span>
<span id="L513" class="LineNr">513 </span><span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>Routines<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L514" class="LineNr">514 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-&gt;</span>state != WAITING<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L515" class="LineNr">515 </span>  routine* waiter = Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
<span id="L516" class="LineNr">516 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!waiter<span class="Delimiter">-&gt;</span>waiting_on_routine_to_block<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L517" class="LineNr">517 </span>  <span class="Normal">int</span> id = waiter<span class="Delimiter">-&gt;</span>waiting_on_routine_to_block<span class="Delimiter">;</span>
<span id="L518" class="LineNr">518 </span>  assert<span class="Delimiter">(</span>id != waiter<span class="Delimiter">-&gt;</span>id<span class="Delimiter">);</span>  <span class="Comment">// routine can't wait on itself</span>
<span id="L519" class="LineNr">519 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> j = <span class="Constant">0</span><span class="Delimiter">;</span>  j &lt; SIZE<span class="Delimiter">(</span>Routines<span class="Delimiter">);</span>  ++j<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L520" class="LineNr">520 </span>    <span class="Normal">const</span> routine* waitee = Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>j<span class="Delimiter">);</span>
<span id="L521" class="LineNr">521 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>waitee<span class="Delimiter">-&gt;</span>id != id<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L522" class="LineNr">522 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>waitee<span class="Delimiter">-&gt;</span>state != RUNNING || waitee<span class="Delimiter">-&gt;</span>blocked<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L523" class="LineNr">523 </span>      trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">&quot;schedule&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;waking up routine &quot;</span> &lt;&lt; waiter<span class="Delimiter">-&gt;</span>id &lt;&lt; <span class="Constant">&quot; because routine &quot;</span> &lt;&lt; waitee<span class="Delimiter">-&gt;</span>id &lt;&lt; <span class="Constant">&quot; is blocked&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L524" class="LineNr">524 </span>      waiter<span class="Delimiter">-&gt;</span>state = RUNNING<span class="Delimiter">;</span>
<span id="L525" class="LineNr">525 </span>      waiter<span class="Delimiter">-&gt;</span>waiting_on_routine_to_block = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L526" class="LineNr">526 </span>    <span class="Delimiter">}</span>
<span id="L527" class="LineNr">527 </span>  <span class="Delimiter">}</span>
<span id="L528" class="LineNr">528 </span><span class="Delimiter">}</span>
<span id="L529" class="LineNr">529 </span>
<span id="L530" class="LineNr">530 </span><span class="Comment">//: helper for restarting blocking routines in tests</span>
<span id="L531" class="LineNr">531 </span>
<span id="L532" class="LineNr">532 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
<span id="L533" class="LineNr">533 </span>RESTART<span class="Delimiter">,</span>
<span id="L534" class="LineNr">534 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
<span id="L535" class="LineNr">535 </span>put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;restart&quot;</span><span class="Delimiter">,</span> RESTART<span class="Delimiter">);</span>
<span id="L536" class="LineNr">536 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span id="L537" class="LineNr">537 </span><span class="Normal">case</span> RESTART: <span class="Delimiter">{</span>
<span id="L538" class="LineNr">538 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L539" class="LineNr">539 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'restart' requires exactly one ingredient, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L540" class="LineNr">540 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L541" class="LineNr">541 </span>  <span class="Delimiter">}</span>
<span id="L542" class="LineNr">542 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!is_mu_number<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> <span class="Delimiter">{</span>
<span id="L543" class="LineNr">543 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;first ingredient of 'restart' should be a routine id generated by 'start-running', but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L544" class="LineNr">544 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L545" class="LineNr">545 </span>  <span class="Delimiter">}</span>
<span id="L546" class="LineNr">546 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L547" class="LineNr">547 </span><span class="Delimiter">}</span>
<span id="L548" class="LineNr">548 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span id="L549" class="LineNr">549 </span><span class="Normal">case</span> RESTART: <span class="Delimiter">{</span>
<span id="L550" class="LineNr">550 </span>  <span class="Normal">int</span> id = ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
<span id="L551" class="LineNr">551 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>Routines<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L552" class="LineNr">552 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-&gt;</span>id == id<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L553" class="LineNr">553 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-&gt;</span>state == WAITING<span class="Delimiter">)</span>
<span id="L554" class="LineNr">554 </span>        Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-&gt;</span>state = RUNNING<span class="Delimiter">;</span>
<span id="L555" class="LineNr">555 </span>      Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-&gt;</span>blocked = <span class="Constant">false</span><span class="Delimiter">;</span>
<span id="L556" class="LineNr">556 </span>      <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L557" class="LineNr">557 </span>    <span class="Delimiter">}</span>
<span id="L558" class="LineNr">558 </span>  <span class="Delimiter">}</span>
<span id="L559" class="LineNr">559 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L560" class="LineNr">560 </span><span class="Delimiter">}</span>
<span id="L561" class="LineNr">561 </span>
<span id="L562" class="LineNr">562 </span><span class="Delimiter">:(scenario cannot_restart_completed_routine)</span>
<span id="L563" class="LineNr">563 </span><span class="Special">% Scheduling_interval = 1;</span>
<span id="L564" class="LineNr">564 </span><span class="muRecipe">def</span> main [
<span id="L565" class="LineNr">565 </span>  local-scope
<span id="L566" class="LineNr">566 </span>  <span class="Normal">r</span>:num/routine-id<span class="Special"> &lt;- </span>start-running f
<span id="L567" class="LineNr">567 </span>  <span class="Normal">x</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>  <span class="Comment"># wait for f to be scheduled</span>
<span id="L568" class="LineNr">568 </span>  <span class="Comment"># r is COMPLETED by this point</span>
<span id="L569" class="LineNr">569 </span>  restart r  <span class="Comment"># should have no effect</span>
<span id="L570" class="LineNr">570 </span>  <span class="Normal">x</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>  <span class="Comment"># give f time to be scheduled (though it shouldn't be)</span>
<span id="L571" class="LineNr">571 </span>]
<span id="L572" class="LineNr">572 </span><span class="muRecipe">def</span> f [
<span id="L573" class="LineNr">573 </span>  <span class="Constant">1</span>:num/<span class="Special">raw &lt;- </span>copy <span class="Constant">1</span>
<span id="L574" class="LineNr">574 </span>]
<span id="L575" class="LineNr">575 </span><span class="Comment"># shouldn't crash</span>
<span id="L576" class="LineNr">576 </span>
<span id="L577" class="LineNr">577 </span><span class="Delimiter">:(scenario restart_blocked_routine)</span>
<span id="L578" class="LineNr">578 </span><span class="Special">% Scheduling_interval = 1;</span>
<span id="L579" class="LineNr">579 </span><span class="muRecipe">def</span> main [
<span id="L580" class="LineNr">580 </span>  local-scope
<span id="L581" class="LineNr">581 </span>  <span class="Normal">r</span>:num/routine-id<span class="Special"> &lt;- </span>start-running f
<span id="L582" class="LineNr">582 </span>  wait-<span class="Normal">for</span>-routine-to-block r  <span class="Comment"># get past the block in f below</span>
<span id="L583" class="LineNr">583 </span>  restart r
<span id="L584" class="LineNr">584 </span>  wait-<span class="Normal">for</span>-routine-to-block r  <span class="Comment"># should run f to completion</span>
<span id="L585" class="LineNr">585 </span>]
<span id="L586" class="LineNr">586 </span><span class="Comment"># function with one block</span>
<span id="L587" class="LineNr">587 </span><span class="muRecipe">def</span> f [
<span id="L588" class="LineNr">588 </span>  current-routine-is-blocked
<span id="L589" class="LineNr">589 </span>  <span class="Comment"># 8 instructions of padding, many more than 'main' above</span>
<span id="L590" class="LineNr">590 </span>  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>add <span class="Constant">1</span>:num<span class="Delimiter">,</span> <span class="Constant">1</span>
<span id="L591" class="LineNr">591 </span>  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>add <span class="Constant">1</span>:num<span class="Delimiter">,</span> <span class="Constant">1</span>
<span id="L592" class="LineNr">592 </span>  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>add <span class="Constant">1</span>:num<span class="Delimiter">,</span> <span class="Constant">1</span>
<span id="L593" class="LineNr">593 </span>  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>add <span class="Constant">1</span>:num<span class="Delimiter">,</span> <span class="Constant">1</span>
<span id="L594" class="LineNr">594 </span>  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>add <span class="Constant">1</span>:num<span class="Delimiter">,</span> <span class="Constant">1</span>
<span id="L595" class="LineNr">595 </span>  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>add <span class="Constant">1</span>:num<span class="Delimiter">,</span> <span class="Constant">1</span>
<span id="L596" class="LineNr">596 </span>  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>add <span class="Constant">1</span>:num<span class="Delimiter">,</span> <span class="Constant">1</span>
<span id="L597" class="LineNr">597 </span>  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>add <span class="Constant">1</span>:num<span class="Delimiter">,</span> <span class="Constant">1</span>
<span id="L598" class="LineNr">598 </span>  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>add <span class="Constant">1</span>:num<span class="Delimiter">,</span> <span class="Constant">1</span>
<span id="L599" class="LineNr">599 </span>]
<span id="L600" class="LineNr">600 </span><span class="Comment"># make sure all of f ran</span>
<span id="L601" class="LineNr">601 </span><span class="traceContains">+mem: storing 8 in location 1</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->