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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="Limit/compiler/jsgen.nim?h=devel&id=3897a8c44b4a9f91fe1562e3c658f33501d6fcef'>3897a8c44 ^