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| author | Kartik K. Agaram <vc@akkartik.com> | 2016-01-26 23:47:23 -0800 |
|---|---|---|
| committer | Kartik K. Agaram <vc@akkartik.com> | 2016-01-26 23:47:23 -0800 |
| commit | d009e158803956c76adbf8f58a62884c3e7affb3 (patch) | |
| tree | b88198e28d15cd1fc064f5300365a190decc4c50 /html/063wait.cc.html | |
| parent | 2da43c9462c7b7c1bb78d2f2826b3b97b4874973 (diff) | |
| download | mu-d009e158803956c76adbf8f58a62884c3e7affb3.tar.gz | |
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Diffstat (limited to 'html/063wait.cc.html')
| -rw-r--r-- | html/063wait.cc.html | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/html/063wait.cc.html b/html/063wait.cc.html new file mode 100644 index 00000000..08d4b049 --- /dev/null +++ b/html/063wait.cc.html @@ -0,0 +1,204 @@ +<!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 - 063wait.cc</title> +<meta name="Generator" content="Vim/7.4"> +<meta name="plugin-version" content="vim7.4_v1"> +<meta name="syntax" content="cpp"> +<meta name="settings" content="use_css,pre_wrap,no_foldcolumn,expand_tabs,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-family: monospace; color: #eeeeee; background-color: #080808; } +* { font-size: 1.05em; } +.traceContains { color: #008000; } +.cSpecial { color: #008000; } +.Comment { color: #9090ff; } +.Delimiter { color: #a04060; } +.Special { color: #ff6060; } +.Identifier { color: #804000; } +.Constant { color: #00a0a0; } +--> +</style> + +<script type='text/javascript'> +<!-- + +--> +</script> +</head> +<body> +<pre id='vimCodeElement'> +<span class="Comment">//: Routines can be put in a 'waiting' state, from which it will be ready to</span> +<span class="Comment">//: run again when a specific memory location changes its value. This is mu's</span> +<span class="Comment">//: basic technique for orchestrating the order in which different routines</span> +<span class="Comment">//: operate.</span> + +<span class="Delimiter">:(scenario wait_for_location)</span> +recipe f1 [ + <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span> + start-running f2 + wait-for-location <span class="Constant">1</span>:number + <span class="Comment"># now wait for f2 to run and modify location 1 before using its value</span> + <span class="Constant">2</span>:number<span class="Special"> <- </span>copy <span class="Constant">1</span>:number +] +recipe f2 [ + <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">34</span> +] +<span class="Comment"># if we got the synchronization wrong we'd be storing 0 in location 2</span> +<span class="traceContains">+mem: storing 34 in location 2</span> + +<span class="Comment">//: define the new state that all routines can be in</span> + +<span class="Delimiter">:(before "End routine States")</span> +WAITING<span class="Delimiter">,</span> +<span class="Delimiter">:(before "End routine Fields")</span> +<span class="Comment">// only if state == WAITING</span> +long long int waiting_on_location<span class="Delimiter">;</span> +int old_value_of_waiting_location<span class="Delimiter">;</span> +<span class="Delimiter">:(before "End routine Constructor")</span> +waiting_on_location = old_value_of_waiting_location = <span class="Constant">0</span><span class="Delimiter">;</span> + +<span class="Comment">//: primitive recipe to put routines in that state</span> + +<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span> +WAIT_FOR_LOCATION<span class="Delimiter">,</span> +<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span> +put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">"wait-for-location"</span><span class="Delimiter">,</span> WAIT_FOR_LOCATION<span class="Delimiter">);</span> +<span class="Delimiter">:(before "End Primitive Recipe Checks")</span> +case WAIT_FOR_LOCATION: <span class="Delimiter">{</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> +<span class="Delimiter">}</span> +<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span> +case WAIT_FOR_LOCATION: <span class="Delimiter">{</span> + reagent loc = 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> + canonize<span class="Delimiter">(</span>loc<span class="Delimiter">);</span> + Current_routine<span class="Delimiter">-></span>state = WAITING<span class="Delimiter">;</span> + Current_routine<span class="Delimiter">-></span>waiting_on_location = loc<span class="Delimiter">.</span>value<span class="Delimiter">;</span> + Current_routine<span class="Delimiter">-></span>old_value_of_waiting_location = get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> loc<span class="Delimiter">.</span>value<span class="Delimiter">);</span> + trace<span class="Delimiter">(</span><span class="Constant">9998</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"waiting for location "</span> << loc<span class="Delimiter">.</span>value << <span class="Constant">" to change from "</span> << no_scientific<span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> loc<span class="Delimiter">.</span>value<span class="Delimiter">))</span> << end<span class="Delimiter">();</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> +<span class="Delimiter">}</span> + +<span class="Comment">//: scheduler tweak to get routines out of that state</span> + +<span class="Delimiter">:(before "End Scheduler State Transitions")</span> +for <span class="Delimiter">(</span>long long int i = <span class="Constant">0</span><span class="Delimiter">;</span> i < SIZE<span class="Delimiter">(</span>Routines<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> + if <span class="Delimiter">(</span>Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-></span>state != WAITING<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span> + if <span class="Delimiter">(</span>Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-></span>waiting_on_location && + get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-></span>waiting_on_location<span class="Delimiter">)</span> != Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-></span>old_value_of_waiting_location<span class="Delimiter">)</span> <span class="Delimiter">{</span> + trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"schedule"</span><span class="Delimiter">)</span> << <span class="Constant">"waking up routine</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> + Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-></span>state = RUNNING<span class="Delimiter">;</span> + Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-></span>waiting_on_location = Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-></span>old_value_of_waiting_location = <span class="Constant">0</span><span class="Delimiter">;</span> + <span class="Delimiter">}</span> +<span class="Delimiter">}</span> + +<span class="Comment">//: also allow waiting on a routine to stop running</span> + +<span class="Delimiter">:(scenario wait_for_routine)</span> +recipe f1 [ + <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span> + <span class="Constant">12</span>:number/routine<span class="Special"> <- </span>start-running f2 + wait-for-routine <span class="Constant">12</span>:number/routine + <span class="Comment"># now wait for f2 to run and modify location 1 before using its value</span> + <span class="Constant">3</span>:number<span class="Special"> <- </span>copy <span class="Constant">1</span>:number +] +recipe f2 [ + <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">34</span> +] +<span class="traceContains">+schedule: f1</span> +<span class="traceContains">+run: waiting for routine 2</span> +<span class="traceContains">+schedule: f2</span> +<span class="traceContains">+schedule: waking up routine 1</span> +<span class="traceContains">+schedule: f1</span> +<span class="Comment"># if we got the synchronization wrong we'd be storing 0 in location 3</span> +<span class="traceContains">+mem: storing 34 in location 3</span> + +<span class="Delimiter">:(before "End routine Fields")</span> +<span class="Comment">// only if state == WAITING</span> +long long int waiting_on_routine<span class="Delimiter">;</span> +<span class="Delimiter">:(before "End routine Constructor")</span> +waiting_on_routine = <span class="Constant">0</span><span class="Delimiter">;</span> + +<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span> +WAIT_FOR_ROUTINE<span class="Delimiter">,</span> +<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span> +put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">"wait-for-routine"</span><span class="Delimiter">,</span> WAIT_FOR_ROUTINE<span class="Delimiter">);</span> +<span class="Delimiter">:(before "End Primitive Recipe Checks")</span> +case WAIT_FOR_ROUTINE: <span class="Delimiter">{</span> + if <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> + raise_error << 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> << <span class="Constant">"'wait-for-routine' requires exactly one ingredient, but got "</span> << inst<span class="Delimiter">.</span>to_string<span class="Delimiter">()</span> << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> + <span class="Delimiter">}</span> + if <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> + raise_error << 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> << <span class="Constant">"first ingredient of 'wait-for-routine' should be a routine id generated by 'start-running', but got "</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>original_string << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> + <span class="Delimiter">}</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> +<span class="Delimiter">}</span> +<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span> +case WAIT_FOR_ROUTINE: <span class="Delimiter">{</span> + if <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">-></span>id<span class="Delimiter">)</span> <span class="Delimiter">{</span> + raise_error << maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> << <span class="Constant">"routine can't wait for itself! "</span> << current_instruction<span class="Delimiter">().</span>to_string<span class="Delimiter">()</span> << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> + <span class="Delimiter">}</span> + Current_routine<span class="Delimiter">-></span>state = WAITING<span class="Delimiter">;</span> + Current_routine<span class="Delimiter">-></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> + trace<span class="Delimiter">(</span><span class="Constant">9998</span><span class="Delimiter">,</span> <span class="Constant">"run"</span><span class="Delimiter">)</span> << <span class="Constant">"waiting for routine "</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> << end<span class="Delimiter">();</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> +<span class="Delimiter">}</span> + +<span class="Delimiter">:(before "End Scheduler State Transitions")</span> +<span class="Comment">// Wake up any routines waiting for other routines to go to sleep.</span> +<span class="Comment">// Important: this must come after the scheduler loop above giving routines</span> +<span class="Comment">// waiting for locations to change a chance to wake up.</span> +for <span class="Delimiter">(</span>long long int i = <span class="Constant">0</span><span class="Delimiter">;</span> i < SIZE<span class="Delimiter">(</span>Routines<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> + if <span class="Delimiter">(</span>Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-></span>state != WAITING<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span> + if <span class="Delimiter">(</span>!Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-></span>waiting_on_routine<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span> + long long int id = Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-></span>waiting_on_routine<span class="Delimiter">;</span> + assert<span class="Delimiter">(</span>id != Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-></span>id<span class="Delimiter">);</span> <span class="Comment">// routine can't wait on itself</span> + for <span class="Delimiter">(</span>long long int j = <span class="Constant">0</span><span class="Delimiter">;</span> j < SIZE<span class="Delimiter">(</span>Routines<span class="Delimiter">);</span> ++j<span class="Delimiter">)</span> <span class="Delimiter">{</span> + if <span class="Delimiter">(</span>Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>j<span class="Delimiter">)-></span>id == id && Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>j<span class="Delimiter">)-></span>state != RUNNING<span class="Delimiter">)</span> <span class="Delimiter">{</span> + trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"schedule"</span><span class="Delimiter">)</span> << <span class="Constant">"waking up routine "</span> << Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-></span>id << end<span class="Delimiter">();</span> + Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-></span>state = RUNNING<span class="Delimiter">;</span> + Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-></span>waiting_on_routine = <span class="Constant">0</span><span class="Delimiter">;</span> + <span class="Delimiter">}</span> + <span class="Delimiter">}</span> +<span class="Delimiter">}</span> + +<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span> +SWITCH<span class="Delimiter">,</span> +<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span> +put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">"switch"</span><span class="Delimiter">,</span> SWITCH<span class="Delimiter">);</span> +<span class="Delimiter">:(before "End Primitive Recipe Checks")</span> +case SWITCH: <span class="Delimiter">{</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> +<span class="Delimiter">}</span> +<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span> +case SWITCH: <span class="Delimiter">{</span> + long long int id = some_other_running_routine<span class="Delimiter">();</span> + if <span class="Delimiter">(</span>id<span class="Delimiter">)</span> <span class="Delimiter">{</span> + assert<span class="Delimiter">(</span>id != Current_routine<span class="Delimiter">-></span>id<span class="Delimiter">);</span> + Current_routine<span class="Delimiter">-></span>state = WAITING<span class="Delimiter">;</span> + Current_routine<span class="Delimiter">-></span>waiting_on_routine = id<span class="Delimiter">;</span> + <span class="Delimiter">}</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> +<span class="Delimiter">}</span> + +<span class="Delimiter">:(code)</span> +long long int some_other_running_routine<span class="Delimiter">()</span> <span class="Delimiter">{</span> + for <span class="Delimiter">(</span>long long int i = <span class="Constant">0</span><span class="Delimiter">;</span> i < SIZE<span class="Delimiter">(</span>Routines<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> + if <span class="Delimiter">(</span>i == Current_routine_index<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span> + assert<span class="Delimiter">(</span>Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)</span> != Current_routine<span class="Delimiter">);</span> + assert<span class="Delimiter">(</span>Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-></span>id != Current_routine<span class="Delimiter">-></span>id<span class="Delimiter">);</span> + if <span class="Delimiter">(</span>Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-></span>state == RUNNING<span class="Delimiter">)</span> + <span class="Identifier">return</span> Routines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)-></span>id<span class="Delimiter">;</span> + <span class="Delimiter">}</span> + <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span> +<span class="Delimiter">}</span> +</pre> +</body> +</html> +<!-- vim: set foldmethod=manual : --> |