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<span id="L1" class="LineNr"> 1 </span><span class="Comment">//: Reclaiming memory when it's no longer used.</span>
<span id="L2" class="LineNr"> 2 </span><span class="Comment">//: The top of the address layer has the complete life cycle of memory.</span>
<span id="L3" class="LineNr"> 3 </span>
<span id="L4" class="LineNr"> 4 </span><span class="Delimiter">:(scenario new_reclaim)</span>
<span id="L5" class="LineNr"> 5 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L6" class="LineNr"> 6 </span> <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:num<span class="Special"> <- </span><span class="Normal">new</span> <span class="Constant">number:type</span>
<span id="L7" class="LineNr"> 7 </span> <span class="Constant">2</span>:num<span class="Special"> <- </span>copy <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:num <span class="Comment"># because 1 will get reset during abandon below</span>
<span id="L8" class="LineNr"> 8 </span> <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:num<span class="Special"> <- </span>copy <span class="Constant">0</span> <span class="Comment"># abandon</span>
<span id="L9" class="LineNr"> 9 </span> <span class="Constant">3</span>:<a href='043space.cc.html#L76'>address</a>:num<span class="Special"> <- </span><span class="Normal">new</span> <span class="Constant">number:type</span> <span class="Comment"># must be same size as abandoned memory to reuse</span>
<span id="L10" class="LineNr"> 10 </span> <span class="Constant">4</span>:num<span class="Special"> <- </span>copy <span class="Constant">3</span>:<a href='043space.cc.html#L76'>address</a>:num
<span id="L11" class="LineNr"> 11 </span> <span class="Constant">5</span>:<span class="Normal">bool</span><span class="Special"> <- </span>equal <span class="Constant">2</span>:num<span class="Delimiter">,</span> <span class="Constant">4</span>:num
<span id="L12" class="LineNr"> 12 </span>]
<span id="L13" class="LineNr"> 13 </span><span class="Comment"># both allocations should have returned the same address</span>
<span id="L14" class="LineNr"> 14 </span><span class="traceContains">+mem: storing 1 in location 5</span>
<span id="L15" class="LineNr"> 15 </span>
<span id="L16" class="LineNr"> 16 </span><span class="Delimiter">:(before "End Decrement Refcount(old_address, <a href='030container.cc.html#L238'>payload_type</a>, payload_size)")</span>
<span id="L17" class="LineNr"> 17 </span><span class="Normal">if</span> <span class="Delimiter">(</span>old_refcount == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L18" class="LineNr"> 18 </span> <a href='003trace.cc.html#L161'>trace</a><span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"mem"</span><span class="Delimiter">)</span> << <span class="Constant">"automatically abandoning "</span> << old_address << <a href='003trace.cc.html#L197'>end</a><span class="Delimiter">();</span>
<span id="L19" class="LineNr"> 19 </span> <a href='037abandon.cc.html#L28'>abandon</a><span class="Delimiter">(</span>old_address<span class="Delimiter">,</span> <a href='030container.cc.html#L238'>payload_type</a><span class="Delimiter">,</span> <a href='036refcount.cc.html#L92'>payload_size</a><span class="Delimiter">);</span>
<span id="L20" class="LineNr"> 20 </span><span class="Delimiter">}</span>
<span id="L21" class="LineNr"> 21 </span>
<span id="L22" class="LineNr"> 22 </span><span class="Comment">//: When abandoning addresses we'll save them to a 'free list', segregated by size.</span>
<span id="L23" class="LineNr"> 23 </span>
<span id="L24" class="LineNr"> 24 </span><span class="Delimiter">:(before "End routine Fields")</span>
<span id="L25" class="LineNr"> 25 </span>map<<span class="Normal">int</span><span class="Delimiter">,</span> <span class="Normal">int</span>> free_list<span class="Delimiter">;</span>
<span id="L26" class="LineNr"> 26 </span>
<span id="L27" class="LineNr"> 27 </span><span class="Delimiter">:(code)</span>
<span id="L28" class="LineNr"> 28 </span><span class="Normal">void</span> <a href='037abandon.cc.html#L28'>abandon</a><span class="Delimiter">(</span><span class="Normal">int</span> <a href='043space.cc.html#L76'>address</a><span class="Delimiter">,</span> <span class="Normal">const</span> type_tree* <a href='030container.cc.html#L238'>payload_type</a><span class="Delimiter">,</span> <span class="Normal">int</span> <a href='036refcount.cc.html#L92'>payload_size</a><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L29" class="LineNr"> 29 </span> <a href='003trace.cc.html#L161'>trace</a><span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"abandon"</span><span class="Delimiter">)</span> << <span class="Constant">"updating refcounts inside "</span> << <a href='043space.cc.html#L76'>address</a> << <span class="Constant">": "</span> << <a href='028call_return.cc.html#L158'>to_string</a><span class="Delimiter">(</span><a href='030container.cc.html#L238'>payload_type</a><span class="Delimiter">)</span> << <a href='003trace.cc.html#L197'>end</a><span class="Delimiter">();</span>
<span id="L30" class="LineNr"> 30 </span><span class="CommentedCode">//? Total_free += size;</span>
<span id="L31" class="LineNr"> 31 </span><span class="CommentedCode">//? ++Num_free;</span>
<span id="L32" class="LineNr"> 32 </span><span class="CommentedCode">//? cerr << "abandon: " << size << '\n';</span>
<span id="L33" class="LineNr"> 33 </span> <span class="Comment">// decrement any contained refcounts</span>
<span id="L34" class="LineNr"> 34 </span> <span class="Normal">if</span> <span class="Delimiter">(</span>is_mu_array<span class="Delimiter">(</span><a href='030container.cc.html#L238'>payload_type</a><span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L35" class="LineNr"> 35 </span> <span class="Conceal">¦</span> reagent<span class="Comment">/*</span><span class="Comment">local</span><span class="Comment">*/</span> element<span class="Delimiter">;</span>
<span id="L36" class="LineNr"> 36 </span> <span class="Conceal">¦</span> element<span class="Delimiter">.</span>type = <a href='032array.cc.html#L378'>copy_array_element</a><span class="Delimiter">(</span><a href='030container.cc.html#L238'>payload_type</a><span class="Delimiter">);</span>
<span id="L37" class="LineNr"> 37 </span> <span class="Conceal">¦</span> <span class="Normal">int</span> <a href='032array.cc.html#L398'>array_length</a> = <a href='001help.cc.html#L228'>get_or_insert</a><span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> address+<span class="Comment">/*</span><span class="Comment">skip refcount</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L38" class="LineNr"> 38 </span> <span class="Conceal">¦</span> assert<span class="Delimiter">(</span>element<span class="Delimiter">.</span>type<span class="Delimiter">-></span>name != <span class="Constant">"array"</span><span class="Delimiter">);</span>
<span id="L39" class="LineNr"> 39 </span> <span class="Conceal">¦</span> <span class="Normal">int</span> element_size = size_of<span class="Delimiter">(</span>element<span class="Delimiter">);</span>
<span id="L40" class="LineNr"> 40 </span> <span class="Conceal">¦</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 < <a href='032array.cc.html#L398'>array_length</a><span class="Delimiter">;</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L41" class="LineNr"> 41 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> element<span class="Delimiter">.</span><a href='010vm.cc.html#L65'>set_value</a><span class="Delimiter">(</span><a href='043space.cc.html#L76'>address</a> + <span class="Comment">/*</span><span class="Comment">skip refcount and length</span><span class="Comment">*/</span><span class="Constant">2</span> + i*element_size<span class="Delimiter">);</span>
<span id="L42" class="LineNr"> 42 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <a href='036refcount.cc.html#L62'>decrement_any_refcounts</a><span class="Delimiter">(</span>element<span class="Delimiter">);</span>
<span id="L43" class="LineNr"> 43 </span> <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L44" class="LineNr"> 44 </span> <span class="Delimiter">}</span>
<span id="L45" class="LineNr"> 45 </span> <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>is_mu_container<span class="Delimiter">(</span><a href='030container.cc.html#L238'>payload_type</a><span class="Delimiter">)</span> || is_mu_exclusive_container<span class="Delimiter">(</span><a href='030container.cc.html#L238'>payload_type</a><span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L46" class="LineNr"> 46 </span> <span class="Conceal">¦</span> reagent tmp<span class="Delimiter">;</span>
<span id="L47" class="LineNr"> 47 </span> <span class="Conceal">¦</span> tmp<span class="Delimiter">.</span>type = <span class="Normal">new</span> type_tree<span class="Delimiter">(</span>*payload_type<span class="Delimiter">);</span>
<span id="L48" class="LineNr"> 48 </span> <span class="Conceal">¦</span> tmp<span class="Delimiter">.</span><a href='010vm.cc.html#L65'>set_value</a><span class="Delimiter">(</span><a href='043space.cc.html#L76'>address</a> + <span class="Comment">/*</span><span class="Comment">skip refcount</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L49" class="LineNr"> 49 </span> <span class="Conceal">¦</span> <a href='036refcount.cc.html#L62'>decrement_any_refcounts</a><span class="Delimiter">(</span>tmp<span class="Delimiter">);</span>
<span id="L50" class="LineNr"> 50 </span> <span class="Delimiter">}</span>
<span id="L51" class="LineNr"> 51 </span> <span class="Comment">// clear memory</span>
<span id="L52" class="LineNr"> 52 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> curr = <a href='043space.cc.html#L76'>address</a><span class="Delimiter">;</span> curr < address+payload_size<span class="Delimiter">;</span> ++curr<span class="Delimiter">)</span>
<span id="L53" class="LineNr"> 53 </span> <span class="Conceal">¦</span> <a href='001help.cc.html#L221'>put</a><span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> curr<span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">);</span>
<span id="L54" class="LineNr"> 54 </span> <span class="Comment">// append existing free list to address</span>
<span id="L55" class="LineNr"> 55 </span> <a href='003trace.cc.html#L161'>trace</a><span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"abandon"</span><span class="Delimiter">)</span> << <span class="Constant">"saving "</span> << <a href='043space.cc.html#L76'>address</a> << <span class="Constant">" in free-list of size "</span> << <a href='036refcount.cc.html#L92'>payload_size</a> << <a href='003trace.cc.html#L197'>end</a><span class="Delimiter">();</span>
<span id="L56" class="LineNr"> 56 </span> <a href='001help.cc.html#L221'>put</a><span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> <a href='043space.cc.html#L76'>address</a><span class="Delimiter">,</span> <a href='001help.cc.html#L228'>get_or_insert</a><span class="Delimiter">(</span>Current_routine<span class="Delimiter">-></span>free_list<span class="Delimiter">,</span> <a href='036refcount.cc.html#L92'>payload_size</a><span class="Delimiter">));</span>
<span id="L57" class="LineNr"> 57 </span> <a href='001help.cc.html#L221'>put</a><span class="Delimiter">(</span>Current_routine<span class="Delimiter">-></span>free_list<span class="Delimiter">,</span> <a href='036refcount.cc.html#L92'>payload_size</a><span class="Delimiter">,</span> <a href='043space.cc.html#L76'>address</a><span class="Delimiter">);</span>
<span id="L58" class="LineNr"> 58 </span><span class="Delimiter">}</span>
<span id="L59" class="LineNr"> 59 </span>
<span id="L60" class="LineNr"> 60 </span><span class="Delimiter">:(after "Allocate Special-cases")</span>
<span id="L61" class="LineNr"> 61 </span><span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L228'>get_or_insert</a><span class="Delimiter">(</span>Current_routine<span class="Delimiter">-></span>free_list<span class="Delimiter">,</span> size<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L62" class="LineNr"> 62 </span> <a href='003trace.cc.html#L161'>trace</a><span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"abandon"</span><span class="Delimiter">)</span> << <span class="Constant">"picking up space from free-list of size "</span> << size << <a href='003trace.cc.html#L197'>end</a><span class="Delimiter">();</span>
<span id="L63" class="LineNr"> 63 </span> <span class="Normal">int</span> result = <a href='001help.cc.html#L228'>get_or_insert</a><span class="Delimiter">(</span>Current_routine<span class="Delimiter">-></span>free_list<span class="Delimiter">,</span> size<span class="Delimiter">);</span>
<span id="L64" class="LineNr"> 64 </span> <a href='003trace.cc.html#L161'>trace</a><span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"mem"</span><span class="Delimiter">)</span> << <span class="Constant">"new alloc from free list: "</span> << result << <a href='003trace.cc.html#L197'>end</a><span class="Delimiter">();</span>
<span id="L65" class="LineNr"> 65 </span> <a href='001help.cc.html#L221'>put</a><span class="Delimiter">(</span>Current_routine<span class="Delimiter">-></span>free_list<span class="Delimiter">,</span> size<span class="Delimiter">,</span> <a href='001help.cc.html#L228'>get_or_insert</a><span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> result<span class="Delimiter">));</span>
<span id="L66" class="LineNr"> 66 </span> <a href='001help.cc.html#L221'>put</a><span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> result<span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">);</span>
<span id="L67" class="LineNr"> 67 </span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> curr = result<span class="Delimiter">;</span> curr < result+size<span class="Delimiter">;</span> ++curr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L68" class="LineNr"> 68 </span> <span class="Conceal">¦</span> <span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L228'>get_or_insert</a><span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> curr<span class="Delimiter">)</span> != <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L69" class="LineNr"> 69 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <a href='003trace.cc.html#L168'>raise</a> << <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span><a href='026call.cc.html#L83'>current_recipe_name</a><span class="Delimiter">())</span> << <span class="Constant">"memory in free list was not zeroed out: "</span> << curr << <span class="Constant">'/'</span> << result << <span class="Constant">"; somebody wrote to us after free!!!</span><span class="cSpecial">\n</span><span class="Constant">"</span> << <a href='003trace.cc.html#L197'>end</a><span class="Delimiter">();</span>
<span id="L70" class="LineNr"> 70 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Identifier">break</span><span class="Delimiter">;</span> <span class="Comment">// always fatal</span>
<span id="L71" class="LineNr"> 71 </span> <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L72" class="LineNr"> 72 </span> <span class="Delimiter">}</span>
<span id="L73" class="LineNr"> 73 </span> <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span id="L74" class="LineNr"> 74 </span><span class="Delimiter">}</span>
<span id="L75" class="LineNr"> 75 </span>
<span id="L76" class="LineNr"> 76 </span><span class="Delimiter">:(scenario new_differing_size_no_reclaim)</span>
<span id="L77" class="LineNr"> 77 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L78" class="LineNr"> 78 </span> <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:num<span class="Special"> <- </span><span class="Normal">new</span> <span class="Constant">number:type</span>
<span id="L79" class="LineNr"> 79 </span> <span class="Constant">2</span>:num<span class="Special"> <- </span>copy <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:num
<span id="L80" class="LineNr"> 80 </span> <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:num<span class="Special"> <- </span>copy <span class="Constant">0</span> <span class="Comment"># abandon</span>
<span id="L81" class="LineNr"> 81 </span> <span class="Constant">3</span>:<a href='043space.cc.html#L76'>address</a>:array:num<span class="Special"> <- </span><span class="Normal">new</span> <span class="Constant">number:type</span><span class="Delimiter">,</span> <span class="Constant">2</span> <span class="Comment"># different size</span>
<span id="L82" class="LineNr"> 82 </span> <span class="Constant">4</span>:num<span class="Special"> <- </span>copy <span class="Constant">3</span>:<a href='043space.cc.html#L76'>address</a>:array:num
<span id="L83" class="LineNr"> 83 </span> <span class="Constant">5</span>:<span class="Normal">bool</span><span class="Special"> <- </span>equal <span class="Constant">2</span>:num<span class="Delimiter">,</span> <span class="Constant">4</span>:num
<span id="L84" class="LineNr"> 84 </span>]
<span id="L85" class="LineNr"> 85 </span><span class="Comment"># no reuse</span>
<span id="L86" class="LineNr"> 86 </span><span class="traceContains">+mem: storing 0 in location 5</span>
<span id="L87" class="LineNr"> 87 </span>
<span id="L88" class="LineNr"> 88 </span><span class="Delimiter">:(scenario new_reclaim_array)</span>
<span id="L89" class="LineNr"> 89 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L90" class="LineNr"> 90 </span> <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:array:num<span class="Special"> <- </span><span class="Normal">new</span> <span class="Constant">number:type</span><span class="Delimiter">,</span> <span class="Constant">2</span>
<span id="L91" class="LineNr"> 91 </span> <span class="Constant">2</span>:num<span class="Special"> <- </span>copy <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:array:num
<span id="L92" class="LineNr"> 92 </span> <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:array:num<span class="Special"> <- </span>copy <span class="Constant">0</span> <span class="Comment"># abandon</span>
<span id="L93" class="LineNr"> 93 </span> <span class="Constant">3</span>:<a href='043space.cc.html#L76'>address</a>:array:num<span class="Special"> <- </span><span class="Normal">new</span> <span class="Constant">number:type</span><span class="Delimiter">,</span> <span class="Constant">2</span> <span class="Comment"># same size</span>
<span id="L94" class="LineNr"> 94 </span> <span class="Constant">4</span>:num<span class="Special"> <- </span>copy <span class="Constant">3</span>:<a href='043space.cc.html#L76'>address</a>:array:num
<span id="L95" class="LineNr"> 95 </span> <span class="Constant">5</span>:<span class="Normal">bool</span><span class="Special"> <- </span>equal <span class="Constant">2</span>:num<span class="Delimiter">,</span> <span class="Constant">4</span>:num
<span id="L96" class="LineNr"> 96 </span>]
<span id="L97" class="LineNr"> 97 </span><span class="Comment"># both calls to new returned identical addresses</span>
<span id="L98" class="LineNr"> 98 </span><span class="traceContains">+mem: storing 1 in location 5</span>
<span id="L99" class="LineNr"> 99 </span>
<span id="L100" class="LineNr">100 </span><span class="Delimiter">:(scenario abandon_on_overwrite)</span>
<span id="L101" class="LineNr">101 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L102" class="LineNr">102 </span> <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:num<span class="Special"> <- </span><span class="Normal">new</span> <span class="Constant">number:type</span>
<span id="L103" class="LineNr">103 </span> <span class="Comment"># over-writing one allocation with another</span>
<span id="L104" class="LineNr">104 </span> <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:num<span class="Special"> <- </span><span class="Normal">new</span> <span class="Constant">number:type</span>
<span id="L105" class="LineNr">105 </span> <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:num<span class="Special"> <- </span>copy <span class="Constant">0</span>
<span id="L106" class="LineNr">106 </span>]
<span id="L107" class="LineNr">107 </span><span class="traceContains">+run: {1: ("address" "number")} <- new {number: "type"}</span>
<span id="L108" class="LineNr">108 </span><span class="traceContains">+mem: incrementing refcount of 1000: 0 -> 1</span>
<span id="L109" class="LineNr">109 </span><span class="traceContains">+run: {1: ("address" "number")} <- new {number: "type"}</span>
<span id="L110" class="LineNr">110 </span><span class="traceContains">+mem: automatically abandoning 1000</span>
<span id="L111" class="LineNr">111 </span>
<span id="L112" class="LineNr">112 </span><span class="Delimiter">:(scenario abandon_after_call)</span>
<span id="L113" class="LineNr">113 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L114" class="LineNr">114 </span> <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:num<span class="Special"> <- </span><span class="Normal">new</span> <span class="Constant">number:type</span>
<span id="L115" class="LineNr">115 </span> <span class="Comment"># passing in addresses to recipes increments refcount</span>
<span id="L116" class="LineNr">116 </span> foo <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:num
<span id="L117" class="LineNr">117 </span> <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:num<span class="Special"> <- </span>copy <span class="Constant">0</span>
<span id="L118" class="LineNr">118 </span>]
<span id="L119" class="LineNr">119 </span><span class="muRecipe">def</span> foo [
<span id="L120" class="LineNr">120 </span> <span class="Constant">2</span>:<a href='043space.cc.html#L76'>address</a>:num<span class="Special"> <- </span>next-ingredient
<span id="L121" class="LineNr">121 </span> <span class="Comment"># return does NOT yet decrement refcount; memory must be explicitly managed</span>
<span id="L122" class="LineNr">122 </span> <span class="Constant">2</span>:<a href='043space.cc.html#L76'>address</a>:num<span class="Special"> <- </span>copy <span class="Constant">0</span>
<span id="L123" class="LineNr">123 </span>]
<span id="L124" class="LineNr">124 </span><span class="traceContains">+run: {1: ("address" "number")} <- new {number: "type"}</span>
<span id="L125" class="LineNr">125 </span><span class="traceContains">+mem: incrementing refcount of 1000: 0 -> 1</span>
<span id="L126" class="LineNr">126 </span><span class="traceContains">+run: foo {1: ("address" "number")}</span>
<span id="L127" class="LineNr">127 </span><span class="Comment"># leave ambiguous precisely when the next increment happens</span>
<span id="L128" class="LineNr">128 </span><span class="traceContains">+mem: incrementing refcount of 1000: 1 -> 2</span>
<span id="L129" class="LineNr">129 </span><span class="traceContains">+run: {2: ("address" "number")} <- copy {0: "literal"}</span>
<span id="L130" class="LineNr">130 </span><span class="traceContains">+mem: decrementing refcount of 1000: 2 -> 1</span>
<span id="L131" class="LineNr">131 </span><span class="traceContains">+run: {1: ("address" "number")} <- copy {0: "literal"}</span>
<span id="L132" class="LineNr">132 </span><span class="traceContains">+mem: decrementing refcount of 1000: 1 -> 0</span>
<span id="L133" class="LineNr">133 </span><span class="traceContains">+mem: automatically abandoning 1000</span>
<span id="L134" class="LineNr">134 </span>
<span id="L135" class="LineNr">135 </span><span class="Delimiter">:(scenario abandon_on_overwrite_array)</span>
<span id="L136" class="LineNr">136 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L137" class="LineNr">137 </span> <span class="Constant">1</span>:num<span class="Special"> <- </span>copy <span class="Constant">30</span>
<span id="L138" class="LineNr">138 </span> <span class="Comment"># allocate an array</span>
<span id="L139" class="LineNr">139 </span> <span class="Constant">10</span>:<a href='043space.cc.html#L76'>address</a>:array:num<span class="Special"> <- </span><span class="Normal">new</span> <span class="Constant">number:type</span><span class="Delimiter">,</span> <span class="Constant">20</span>
<span id="L140" class="LineNr">140 </span> <span class="Constant">11</span>:num<span class="Special"> <- </span>copy <span class="Constant">10</span>:<a href='043space.cc.html#L76'>address</a>:array:num <span class="Comment"># doesn't increment refcount</span>
<span id="L141" class="LineNr">141 </span> <span class="Comment"># allocate another array in its place, implicitly freeing the previous allocation</span>
<span id="L142" class="LineNr">142 </span> <span class="Constant">10</span>:<a href='043space.cc.html#L76'>address</a>:array:num<span class="Special"> <- </span><span class="Normal">new</span> <span class="Constant">number:type</span><span class="Delimiter">,</span> <span class="Constant">25</span>
<span id="L143" class="LineNr">143 </span>]
<span id="L144" class="LineNr">144 </span><span class="traceContains">+run: {10: ("address" "array" "number")} <- new {number: "type"}, {25: "literal"}</span>
<span id="L145" class="LineNr">145 </span><span class="Comment"># abandoned array is of old size (20, not 25)</span>
<span id="L146" class="LineNr">146 </span><span class="traceContains">+abandon: saving 1000 in free-list of size 22</span>
<span id="L147" class="LineNr">147 </span>
<span id="L148" class="LineNr">148 </span><span class="Delimiter">:(scenario refcounts_abandon_address_in_container)</span>
<span id="L149" class="LineNr">149 </span><span class="Comment"># container containing an address</span>
<span id="L150" class="LineNr">150 </span><span class="muData">container</span> foo [
<span id="L151" class="LineNr">151 </span> <span class="Normal">x</span>:<a href='043space.cc.html#L76'>address</a>:num
<span id="L152" class="LineNr">152 </span>]
<span id="L153" class="LineNr">153 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L154" class="LineNr">154 </span> <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:num<span class="Special"> <- </span><span class="Normal">new</span> <span class="Constant">number:type</span>
<span id="L155" class="LineNr">155 </span> <span class="Constant">2</span>:<a href='043space.cc.html#L76'>address</a>:foo<span class="Special"> <- </span><span class="Normal">new</span> <span class="Constant">foo:type</span>
<span id="L156" class="LineNr">156 </span> *<span class="Constant">2</span>:<a href='043space.cc.html#L76'>address</a>:foo<span class="Special"> <- </span><a href='001help.cc.html#L221'>put</a> *<span class="Constant">2</span>:<a href='043space.cc.html#L76'>address</a>:foo<span class="Delimiter">,</span> <span class="Constant">x:offset</span><span class="Delimiter">,</span> <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:num
<span id="L157" class="LineNr">157 </span> <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:num<span class="Special"> <- </span>copy <span class="Constant">0</span>
<span id="L158" class="LineNr">158 </span> <span class="Constant">2</span>:<a href='043space.cc.html#L76'>address</a>:foo<span class="Special"> <- </span>copy <span class="Constant">0</span>
<span id="L159" class="LineNr">159 </span>]
<span id="L160" class="LineNr">160 </span><span class="traceContains">+run: {1: ("address" "number")} <- new {number: "type"}</span>
<span id="L161" class="LineNr">161 </span><span class="traceContains">+mem: incrementing refcount of 1000: 0 -> 1</span>
<span id="L162" class="LineNr">162 </span><span class="traceContains">+run: {2: ("address" "foo")} <- new {foo: "type"}</span>
<span id="L163" class="LineNr">163 </span><span class="traceContains">+mem: incrementing refcount of 1002: 0 -> 1</span>
<span id="L164" class="LineNr">164 </span><span class="traceContains">+run: {2: ("address" "foo"), "lookup": ()} <- <a href='001help.cc.html#L221'>put</a> {2: ("address" "foo"), "lookup": ()}, {x: "offset"}, {1: ("address" "number")}</span>
<span id="L165" class="LineNr">165 </span><span class="traceContains">+mem: incrementing refcount of 1000: 1 -> 2</span>
<span id="L166" class="LineNr">166 </span><span class="traceContains">+run: {1: ("address" "number")} <- copy {0: "literal"}</span>
<span id="L167" class="LineNr">167 </span><span class="traceContains">+mem: decrementing refcount of 1000: 2 -> 1</span>
<span id="L168" class="LineNr">168 </span><span class="traceContains">+run: {2: ("address" "foo")} <- copy {0: "literal"}</span>
<span id="L169" class="LineNr">169 </span><span class="Comment"># start abandoning container containing address</span>
<span id="L170" class="LineNr">170 </span><span class="traceContains">+mem: decrementing refcount of 1002: 1 -> 0</span>
<span id="L171" class="LineNr">171 </span><span class="Comment"># nested abandon</span>
<span id="L172" class="LineNr">172 </span><span class="traceContains">+mem: decrementing refcount of 1000: 1 -> 0</span>
<span id="L173" class="LineNr">173 </span><span class="traceContains">+abandon: saving 1000 in free-list of size 2</span>
<span id="L174" class="LineNr">174 </span><span class="Comment"># actually abandon the container containing address</span>
<span id="L175" class="LineNr">175 </span><span class="traceContains">+abandon: saving 1002 in free-list of size 2</span>
<span id="L176" class="LineNr">176 </span>
<span id="L177" class="LineNr">177 </span><span class="Comment"># todo: move past dilated reagent</span>
<span id="L178" class="LineNr">178 </span><span class="Delimiter">:(scenario refcounts_abandon_address_in_array)</span>
<span id="L179" class="LineNr">179 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L180" class="LineNr">180 </span> <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:num<span class="Special"> <- </span><span class="Normal">new</span> <span class="Constant">number:type</span>
<span id="L181" class="LineNr">181 </span> <span class="Constant">2</span>:<a href='043space.cc.html#L76'>address</a>:array:<a href='043space.cc.html#L76'>address</a>:num<span class="Special"> <- </span><span class="Normal">new</span> <span class="Delimiter">{(</span><a href='043space.cc.html#L76'>address</a> number<span class="Delimiter">)</span>: type<span class="Delimiter">},</span> <span class="Constant">3</span>
<span id="L182" class="LineNr">182 </span> *<span class="Constant">2</span>:<a href='043space.cc.html#L76'>address</a>:array:<a href='043space.cc.html#L76'>address</a>:num<span class="Special"> <- </span>put-index *<span class="Constant">2</span>:<a href='043space.cc.html#L76'>address</a>:array:<a href='043space.cc.html#L76'>address</a>:num<span class="Delimiter">,</span> <span class="Constant">1</span><span class="Delimiter">,</span> <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:num
<span id="L183" class="LineNr">183 </span> <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:num<span class="Special"> <- </span>copy <span class="Constant">0</span>
<span id="L184" class="LineNr">184 </span> <span class="Constant">2</span>:<a href='043space.cc.html#L76'>address</a>:array:<a href='043space.cc.html#L76'>address</a>:num<span class="Special"> <- </span>copy <span class="Constant">0</span>
<span id="L185" class="LineNr">185 </span>]
<span id="L186" class="LineNr">186 </span><span class="traceContains">+run: {1: ("address" "number")} <- new {number: "type"}</span>
<span id="L187" class="LineNr">187 </span><span class="traceContains">+mem: incrementing refcount of 1000: 0 -> 1</span>
<span id="L188" class="LineNr">188 </span><span class="traceContains">+run: {2: ("address" "array" "address" "number"), "lookup": ()} <- put-index {2: ("address" "array" "address" "number"), "lookup": ()}, {1: "literal"}, {1: ("address" "number")}</span>
<span id="L189" class="LineNr">189 </span><span class="traceContains">+mem: incrementing refcount of 1000: 1 -> 2</span>
<span id="L190" class="LineNr">190 </span><span class="traceContains">+run: {1: ("address" "number")} <- copy {0: "literal"}</span>
<span id="L191" class="LineNr">191 </span><span class="traceContains">+mem: decrementing refcount of 1000: 2 -> 1</span>
<span id="L192" class="LineNr">192 </span><span class="traceContains">+run: {2: ("address" "array" "address" "number")} <- copy {0: "literal"}</span>
<span id="L193" class="LineNr">193 </span><span class="Comment"># nested abandon</span>
<span id="L194" class="LineNr">194 </span><span class="traceContains">+mem: decrementing refcount of 1000: 1 -> 0</span>
<span id="L195" class="LineNr">195 </span><span class="traceContains">+abandon: saving 1000 in free-list of size 2</span>
<span id="L196" class="LineNr">196 </span>
<span id="L197" class="LineNr">197 </span><span class="Delimiter">:(scenario refcounts_abandon_address_in_container_in_array)</span>
<span id="L198" class="LineNr">198 </span><span class="Comment"># container containing an address</span>
<span id="L199" class="LineNr">199 </span><span class="muData">container</span> foo [
<span id="L200" class="LineNr">200 </span> <span class="Normal">x</span>:<a href='043space.cc.html#L76'>address</a>:num
<span id="L201" class="LineNr">201 </span>]
<span id="L202" class="LineNr">202 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L203" class="LineNr">203 </span> <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:num<span class="Special"> <- </span><span class="Normal">new</span> <span class="Constant">number:type</span>
<span id="L204" class="LineNr">204 </span> <span class="Constant">2</span>:<a href='043space.cc.html#L76'>address</a>:array:foo<span class="Special"> <- </span><span class="Normal">new</span> <span class="Constant">foo:type</span><span class="Delimiter">,</span> <span class="Constant">3</span>
<span id="L205" class="LineNr">205 </span> <span class="Constant">3</span>:foo<span class="Special"> <- </span>merge <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:num
<span id="L206" class="LineNr">206 </span> *<span class="Constant">2</span>:<a href='043space.cc.html#L76'>address</a>:array:foo<span class="Special"> <- </span>put-index *<span class="Constant">2</span>:<a href='043space.cc.html#L76'>address</a>:array:foo<span class="Delimiter">,</span> <span class="Constant">1</span><span class="Delimiter">,</span> <span class="Constant">3</span>:foo
<span id="L207" class="LineNr">207 </span> <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:num<span class="Special"> <- </span>copy <span class="Constant">0</span>
<span id="L208" class="LineNr">208 </span> <span class="Constant">3</span>:foo<span class="Special"> <- </span>merge <span class="Constant">0</span>
<span id="L209" class="LineNr">209 </span> <span class="Constant">2</span>:<a href='043space.cc.html#L76'>address</a>:array:foo<span class="Special"> <- </span>copy <span class="Constant">0</span>
<span id="L210" class="LineNr">210 </span>]
<span id="L211" class="LineNr">211 </span><span class="traceContains">+run: {1: ("address" "number")} <- new {number: "type"}</span>
<span id="L212" class="LineNr">212 </span><span class="traceContains">+mem: incrementing refcount of 1000: 0 -> 1</span>
<span id="L213" class="LineNr">213 </span><span class="traceContains">+run: {3: "foo"} <- merge {1: ("address" "number")}</span>
<span id="L214" class="LineNr">214 </span><span class="traceContains">+mem: incrementing refcount of 1000: 1 -> 2</span>
<span id="L215" class="LineNr">215 </span><span class="traceContains">+run: {2: ("address" "array" "foo"), "lookup": ()} <- put-index {2: ("address" "array" "foo"), "lookup": ()}, {1: "literal"}, {3: "foo"}</span>
<span id="L216" class="LineNr">216 </span><span class="traceContains">+mem: incrementing refcount of 1000: 2 -> 3</span>
<span id="L217" class="LineNr">217 </span><span class="traceContains">+run: {1: ("address" "number")} <- copy {0: "literal"}</span>
<span id="L218" class="LineNr">218 </span><span class="traceContains">+mem: decrementing refcount of 1000: 3 -> 2</span>
<span id="L219" class="LineNr">219 </span><span class="traceContains">+run: {3: "foo"} <- merge {0: "literal"}</span>
<span id="L220" class="LineNr">220 </span><span class="traceContains">+mem: decrementing refcount of 1000: 2 -> 1</span>
<span id="L221" class="LineNr">221 </span><span class="traceContains">+run: {2: ("address" "array" "foo")} <- copy {0: "literal"}</span>
<span id="L222" class="LineNr">222 </span><span class="Comment"># nested abandon</span>
<span id="L223" class="LineNr">223 </span><span class="traceContains">+mem: decrementing refcount of 1000: 1 -> 0</span>
<span id="L224" class="LineNr">224 </span><span class="traceContains">+abandon: saving 1000 in free-list of size 2</span>
<span id="L225" class="LineNr">225 </span>
<span id="L226" class="LineNr">226 </span><span class="Delimiter">:(scenario refcounts_abandon_array_within_container)</span>
<span id="L227" class="LineNr">227 </span><span class="muData">container</span> foo [
<span id="L228" class="LineNr">228 </span> <span class="Normal">x</span>:<a href='043space.cc.html#L76'>address</a>:array:num
<span id="L229" class="LineNr">229 </span>]
<span id="L230" class="LineNr">230 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L231" class="LineNr">231 </span> <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:array:num<span class="Special"> <- </span><span class="Normal">new</span> <span class="Constant">number:type</span><span class="Delimiter">,</span> <span class="Constant">3</span>
<span id="L232" class="LineNr">232 </span> <span class="Constant">2</span>:foo<span class="Special"> <- </span>merge <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:array:num
<span id="L233" class="LineNr">233 </span> <span class="Constant">1</span>:<a href='043space.cc.html#L76'>address</a>:array:num<span class="Special"> <- </span>copy <span class="Constant">0</span>
<span id="L234" class="LineNr">234 </span> <span class="Constant">2</span>:foo<span class="Special"> <- </span>copy <span class="Constant">0</span>
<span id="L235" class="LineNr">235 </span>]
<span id="L236" class="LineNr">236 </span><span class="traceContains">+run: {1: ("address" "array" "number")} <- new {number: "type"}, {3: "literal"}</span>
<span id="L237" class="LineNr">237 </span><span class="traceContains">+mem: incrementing refcount of 1000: 0 -> 1</span>
<span id="L238" class="LineNr">238 </span><span class="traceContains">+run: {2: "foo"} <- merge {1: ("address" "array" "number")}</span>
<span id="L239" class="LineNr">239 </span><span class="traceContains">+mem: incrementing refcount of 1000: 1 -> 2</span>
<span id="L240" class="LineNr">240 </span><span class="traceContains">+run: {1: ("address" "array" "number")} <- copy {0: "literal"}</span>
<span id="L241" class="LineNr">241 </span><span class="traceContains">+mem: decrementing refcount of 1000: 2 -> 1</span>
<span id="L242" class="LineNr">242 </span><span class="traceContains">+run: {2: "foo"} <- copy {0: "literal"}</span>
<span id="L243" class="LineNr">243 </span><span class="traceContains">+mem: decrementing refcount of 1000: 1 -> 0</span>
<span id="L244" class="LineNr">244 </span><span class="traceContains">+mem: automatically abandoning 1000</span>
<span id="L245" class="LineNr">245 </span><span class="Comment"># make sure we save it in a free-list of the appropriate size</span>
<span id="L246" class="LineNr">246 </span><span class="traceContains">+abandon: saving 1000 in free-list of size 5</span>
</pre>
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