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diff --git a/html/072wait.cc.html b/html/072wait.cc.html new file mode 100644 index 00000000..b07d3272 --- /dev/null +++ b/html/072wait.cc.html @@ -0,0 +1,369 @@ +<!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 - 072wait.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="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-size: 12pt; font-family: monospace; color: #eeeeee; background-color: #080808; } +* { font-size: 12pt; font-size: 1em; } +.Constant { color: #00a0a0; } +.cSpecial { color: #008000; } +.traceContains { color: #008000; } +.Comment { color: #9090ff; } +.Delimiter { color: #800080; } +.Special { color: #c00000; } +.Identifier { color: #fcb165; } +.Normal { color: #eeeeee; background-color: #080808; padding-bottom: 1px; } +--> +</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> +def f1 [ + <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">0</span> + start-running f2 + <span class="Constant">2</span>:location<span class="Special"> <- </span>copy <span class="Constant">1</span>/unsafe + wait-<span class="Normal">for</span>-location <span class="Constant">2</span>:location + <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 +] +def 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 3</span> +<span class="traceContains">+mem: storing 34 in location 3</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> +<span class="Normal">int</span> waiting_on_location<span class="Delimiter">;</span> +<span class="Normal">int</span> 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="Delimiter">:(before "End Mu Test Teardown")</span> +<span class="Normal">if</span> <span class="Delimiter">(</span>Passed && any_routines_waiting<span class="Delimiter">())</span> <span class="Delimiter">{</span> + Passed = <span class="Constant">false</span><span class="Delimiter">;</span> + raise << Current_scenario<span class="Delimiter">-></span>name << <span class="Constant">": deadlock!</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> + ++Num_failures<span class="Delimiter">;</span> +<span class="Delimiter">}</span> +<span class="Delimiter">:(before "End Test Teardown")</span> +<span class="Normal">if</span> <span class="Delimiter">(</span>Passed && any_routines_with_error<span class="Delimiter">())</span> <span class="Delimiter">{</span> + Passed = <span class="Constant">false</span><span class="Delimiter">;</span> + raise << <span class="Constant">"some routines died with errors</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> + ++Num_failures<span class="Delimiter">;</span> +<span class="Delimiter">}</span> +<span class="Delimiter">:(code)</span> +<span class="Normal">bool</span> any_routines_waiting<span class="Delimiter">()</span> <span class="Delimiter">{</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 < SIZE<span class="Delimiter">(</span>Routines<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> + <span class="Normal">if</span> <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">return</span> <span class="Constant">true</span><span class="Delimiter">;</span> + <span class="Delimiter">}</span> + <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</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> +<span class="Normal">case</span> WAIT_FOR_LOCATION: <span class="Delimiter">{</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> + raise << 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-location' requires exactly one ingredient, but got '"</span> << to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> + <span class="Delimiter">}</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> + raise << 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-location' requires a location ingredient, 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="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<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> +<span class="Normal">case</span> WAIT_FOR_LOCATION: <span class="Delimiter">{</span> + <span class="Normal">int</span> loc = 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>state = WAITING<span class="Delimiter">;</span> + Current_routine<span class="Delimiter">-></span>waiting_on_location = loc<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> + 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="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> << 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> +<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 < SIZE<span class="Delimiter">(</span>Routines<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> + <span class="Normal">if</span> <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> + <span class="Normal">if</span> <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">//: primitive to help compute locations to wait for</span> +<span class="Comment">//: only supports elements inside containers, no arrays or containers within</span> +<span class="Comment">//: containers yet.</span> + +<span class="Delimiter">:(scenario get_location)</span> +def main [ + <span class="Constant">12</span>:number<span class="Special"> <- </span>copy <span class="Constant">34</span> + <span class="Constant">13</span>:number<span class="Special"> <- </span>copy <span class="Constant">35</span> + <span class="Constant">15</span>:location<span class="Special"> <- </span>get-location <span class="Constant">12</span>:point<span class="Delimiter">,</span> <span class="Constant">1</span>:offset +] +<span class="traceContains">+mem: storing 13 in location 15</span> + +<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span> +GET_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">"get-location"</span><span class="Delimiter">,</span> GET_LOCATION<span class="Delimiter">);</span> +<span class="Delimiter">:(before "End Primitive Recipe Checks")</span> +<span class="Normal">case</span> GET_LOCATION: <span class="Delimiter">{</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> + raise << 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">"'get-location' expects exactly 2 ingredients in '"</span> << to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> + <span class="Delimiter">}</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 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 class="Normal">if</span> <span class="Delimiter">(</span>!base<span class="Delimiter">.</span>type || !base<span class="Delimiter">.</span>type<span class="Delimiter">-></span>value || !contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base<span class="Delimiter">.</span>type<span class="Delimiter">-></span>value<span class="Delimiter">)</span> || get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base<span class="Delimiter">.</span>type<span class="Delimiter">-></span>value<span class="Delimiter">).</span>kind != CONTAINER<span class="Delimiter">)</span> <span class="Delimiter">{</span> + raise << 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 'get-location' should be a container, 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="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> + <span class="Delimiter">}</span> + type_ordinal base_type = base<span class="Delimiter">.</span>type<span class="Delimiter">-></span>value<span class="Delimiter">;</span> + <span class="Normal">const</span> reagent& 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 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> + raise << 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">"second ingredient of 'get-location' should have type 'offset', but got '"</span> << 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 << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> + <span class="Delimiter">}</span> + <span class="Normal">int</span> offset_value = <span class="Constant">0</span><span class="Delimiter">;</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 class="Comment">// later layers permit non-integer offsets</span> + offset_value = to_integer<span class="Delimiter">(</span>offset<span class="Delimiter">.</span>name<span class="Delimiter">);</span> + <span class="Normal">if</span> <span class="Delimiter">(</span>offset_value < <span class="Constant">0</span> || offset_value >= 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> + raise << 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">"invalid offset "</span> << offset_value << <span class="Constant">" for '"</span> << get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">).</span>name << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> + <span class="Delimiter">}</span> + <span class="Delimiter">}</span> + <span class="Normal">else</span> <span class="Delimiter">{</span> + offset_value = offset<span class="Delimiter">.</span>value<span class="Delimiter">;</span> + <span class="Delimiter">}</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 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> + raise << 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">"'get-location "</span> << base<span class="Delimiter">.</span>original_string << <span class="Constant">", "</span> << offset<span class="Delimiter">.</span>original_string << <span class="Constant">"' should write to type location but '"</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>name << <span class="Constant">"' has type '"</span> << 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> << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</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> +<span class="Normal">case</span> GET_LOCATION: <span class="Delimiter">{</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> + canonize<span class="Delimiter">(</span>base<span class="Delimiter">);</span> + <span class="Normal">int</span> base_address = base<span class="Delimiter">.</span>value<span class="Delimiter">;</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> + raise << maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> << <span class="Constant">"tried to access location 0 in '"</span> << to_original_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">())</span> << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> + <span class="Delimiter">}</span> + type_ordinal base_type = base<span class="Delimiter">.</span>type<span class="Delimiter">-></span>value<span class="Delimiter">;</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 class="Normal">if</span> <span class="Delimiter">(</span>offset < <span class="Constant">0</span> || offset >= 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="Identifier">break</span><span class="Delimiter">;</span> <span class="Comment">// copied from Check above</span> + <span class="Normal">int</span> result = base_address<span class="Delimiter">;</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 < offset<span class="Delimiter">;</span> ++i<span class="Delimiter">)</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> + 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">"address to copy is "</span> << result << end<span class="Delimiter">();</span> + products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</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 class="Identifier">break</span><span class="Delimiter">;</span> +<span class="Delimiter">}</span> + +<span class="Delimiter">:(code)</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 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 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 class="Normal">if</span> <span class="Delimiter">(</span>x<span class="Delimiter">.</span>type<span class="Delimiter">-></span>right<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span> + <span class="Identifier">return</span> x<span class="Delimiter">.</span>type<span class="Delimiter">-></span>value == get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">"location"</span><span class="Delimiter">);</span> +<span class="Delimiter">}</span> + +<span class="Delimiter">:(scenario get_location_out_of_bounds)</span> +<span class="Special">% Hide_errors = true;</span> +def main [ + <span class="Constant">12</span>:number<span class="Special"> <- </span>copy <span class="Constant">34</span> + <span class="Constant">13</span>:number<span class="Special"> <- </span>copy <span class="Constant">35</span> + <span class="Constant">14</span>:number<span class="Special"> <- </span>copy <span class="Constant">36</span> + get-location <span class="Constant">12</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">2</span>:offset <span class="Comment"># point-number occupies 3 locations but has only 2 fields; out of bounds</span> +] +<span class="traceContains">+error: main: invalid offset 2 for 'point-number'</span> + +<span class="Delimiter">:(scenario get_location_out_of_bounds_2)</span> +<span class="Special">% Hide_errors = true;</span> +def main [ + <span class="Constant">12</span>:number<span class="Special"> <- </span>copy <span class="Constant">34</span> + <span class="Constant">13</span>:number<span class="Special"> <- </span>copy <span class="Constant">35</span> + <span class="Constant">14</span>:number<span class="Special"> <- </span>copy <span class="Constant">36</span> + get-location <span class="Constant">12</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> -<span class="Constant">1</span>:offset +] +<span class="traceContains">+error: main: invalid offset -1 for 'point-number'</span> + +<span class="Delimiter">:(scenario get_location_product_type_mismatch)</span> +<span class="Special">% Hide_errors = true;</span> +container boolbool [ + <span class="Normal">x</span>:boolean + <span class="Normal">y</span>:boolean +] +def main [ + <span class="Constant">12</span>:boolean<span class="Special"> <- </span>copy <span class="Constant">1</span> + <span class="Constant">13</span>:boolean<span class="Special"> <- </span>copy <span class="Constant">0</span> + <span class="Constant">15</span>:boolean<span class="Special"> <- </span>get-location <span class="Constant">12</span>:boolbool<span class="Delimiter">,</span> <span class="Constant">1</span>:offset +] +<span class="traceContains">+error: main: 'get-location 12:boolbool, 1:offset' should write to type location but '15' has type 'boolean'</span> + +<span class="Delimiter">:(scenario get_location_indirect)</span> +<span class="Comment"># 'get-location' can read from container address</span> +def main [ + <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">10</span> + <span class="Comment"># 10 reserved for refcount</span> + <span class="Constant">11</span>:number<span class="Special"> <- </span>copy <span class="Constant">34</span> + <span class="Constant">12</span>:number<span class="Special"> <- </span>copy <span class="Constant">35</span> + <span class="Constant">4</span>:location<span class="Special"> <- </span>get-location <span class="Constant">1</span>:address:point/lookup<span class="Delimiter">,</span> <span class="Constant">0</span>:offset +] +<span class="traceContains">+mem: storing 11 in location 4</span> + +<span class="Delimiter">:(scenario get_location_indirect_2)</span> +def main [ + <span class="Constant">1</span>:number<span class="Special"> <- </span>copy <span class="Constant">10</span> + <span class="Comment"># 10 reserved for refcount</span> + <span class="Constant">11</span>:number<span class="Special"> <- </span>copy <span class="Constant">34</span> + <span class="Constant">12</span>:number<span class="Special"> <- </span>copy <span class="Constant">35</span> + <span class="Constant">4</span>:address:number<span class="Special"> <- </span>copy <span class="Constant">20</span>/unsafe + <span class="Constant">4</span>:address:location/lookup<span class="Special"> <- </span>get-location <span class="Constant">1</span>:address:point/lookup<span class="Delimiter">,</span> <span class="Constant">0</span>:offset +] +<span class="traceContains">+mem: storing 11 in location 21</span> + +<span class="Comment">//: also allow waiting on a routine to stop running</span> + +<span class="Delimiter">:(scenario wait_for_routine)</span> +def 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-<span class="Normal">for</span>-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 +] +def 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> +<span class="Normal">int</span> 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> +<span class="Normal">case</span> WAIT_FOR_ROUTINE: <span class="Delimiter">{</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> + raise << 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> << to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span> + <span class="Identifier">break</span><span class="Delimiter">;</span> + <span class="Delimiter">}</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> + raise << 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="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</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> +<span class="Normal">case</span> WAIT_FOR_ROUTINE: <span class="Delimiter">{</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">-></span>id<span class="Delimiter">)</span> <span class="Delimiter">{</span> + raise << maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> << <span class="Constant">"routine can't wait for itself! '"</span> << to_original_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">())</span> << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</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> +<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 < SIZE<span class="Delimiter">(</span>Routines<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> + <span class="Normal">if</span> <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> + <span class="Normal">if</span> <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> + <span class="Normal">int</span> 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> + <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 < SIZE<span class="Delimiter">(</span>Routines<span class="Delimiter">);</span> ++j<span class="Delimiter">)</span> <span class="Delimiter">{</span> + <span class="Normal">if</span> <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> +<span class="Normal">case</span> 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> +<span class="Normal">case</span> SWITCH: <span class="Delimiter">{</span> + <span class="Normal">int</span> id = some_other_running_routine<span class="Delimiter">();</span> + <span class="Normal">if</span> <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> +<span class="Normal">int</span> some_other_running_routine<span class="Delimiter">()</span> <span class="Delimiter">{</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 < SIZE<span class="Delimiter">(</span>Routines<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span> + <span class="Normal">if</span> <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> + <span class="Normal">if</span> <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 : --> |