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<span class="Comment">//: A simple memory allocator to create space for new variables at runtime.</span>
<span class="Delimiter">:(scenarios run)</span>
<span class="Delimiter">:(scenario new)</span>
<span class="Comment"># call new two times with identical arguments; you should get back different results</span>
recipe main [
<span class="Constant">1</span>:address:number/<span class="Special">raw <- </span><span class="Normal">new</span> number:type
<span class="Constant">2</span>:address:number/<span class="Special">raw <- </span><span class="Normal">new</span> number:type
<span class="Constant">3</span>:boolean/<span class="Special">raw <- </span>equal <span class="Constant">1</span>:address:number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">2</span>:address:number/<span class="Special">raw</span>
]
<span class="traceContains">+mem: storing 0 in location 3</span>
<span class="Delimiter">:(before "End Globals")</span>
<span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> Reserved_for_tests = <span class="Constant">1000</span><span class="Delimiter">;</span>
<span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> Memory_allocated_until = Reserved_for_tests<span class="Delimiter">;</span>
<span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> Initial_memory_per_routine = <span class="Constant">100000</span><span class="Delimiter">;</span>
<span class="Delimiter">:(before "End Setup")</span>
Memory_allocated_until = Reserved_for_tests<span class="Delimiter">;</span>
Initial_memory_per_routine = <span class="Constant">100000</span><span class="Delimiter">;</span>
<span class="Delimiter">:(before "End routine Fields")</span>
<span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> alloc<span class="Delimiter">,</span> alloc_max<span class="Delimiter">;</span>
<span class="Delimiter">:(before "End routine Constructor")</span>
alloc = Memory_allocated_until<span class="Delimiter">;</span>
Memory_allocated_until += Initial_memory_per_routine<span class="Delimiter">;</span>
alloc_max = Memory_allocated_until<span class="Delimiter">;</span>
trace<span class="Delimiter">(</span>Primitive_recipe_depth<span class="Delimiter">,</span> <span class="Constant">"new"</span><span class="Delimiter">)</span> << <span class="Constant">"routine allocated memory from "</span> << alloc << <span class="Constant">" to "</span> << alloc_max << end<span class="Delimiter">();</span>
<span class="SalientComment">//:: First handle 'type' operands.</span>
<span class="Delimiter">:(before "End Mu Types Initialization")</span>
Type_ordinal[<span class="Constant">"type"</span>] = <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Delimiter">:(after "Per-recipe Transforms")</span>
<span class="Comment">// replace type names with type_ordinals</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>operation == Recipe_ordinal[<span class="Constant">"new"</span>]<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Comment">// End NEW Transform Special-cases</span>
<span class="Comment">// first arg must be of type 'type'</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>empty<span class="Delimiter">())</span>
raise << Recipe[r]<span class="Delimiter">.</span>name << <span class="Constant">": 'new' expects one or two ingredients</span><span class="cSpecial">\n</span><span class="Constant">"</span> << end<span class="Delimiter">();</span>
<span class="Normal">if</span> <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>properties<span class="Delimiter">.</span>empty<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>properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>second<span class="Delimiter">.</span>empty<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>properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>second<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> != <span class="Constant">"type"</span><span class="Delimiter">)</span>
raise << Recipe[r]<span class="Delimiter">.</span>name << <span class="Constant">": first ingredient of 'new' should be a type, but got "</span> << inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">.</span>find<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>name<span class="Delimiter">)</span> == Type_ordinal<span class="Delimiter">.</span>end<span class="Delimiter">())</span>
raise << Recipe[r]<span class="Delimiter">.</span>name << <span class="Constant">": unknown type "</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>name << <span class="cSpecial">'\n'</span> << end<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>set_value<span class="Delimiter">(</span>Type_ordinal[inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name]<span class="Delimiter">);</span>
trace<span class="Delimiter">(</span>Primitive_recipe_depth<span class="Delimiter">,</span> <span class="Constant">"new"</span><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>name << <span class="Constant">" -> "</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>name << end<span class="Delimiter">();</span>
<span class="Normal">end_new_transform</span>:<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="SalientComment">//:: Now implement the primitive recipe.</span>
<span class="Comment">//: todo: build 'new' in mu itself</span>
<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span>
NEW<span class="Delimiter">,</span>
<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span>
Recipe_ordinal[<span class="Constant">"new"</span>] = NEW<span class="Delimiter">;</span>
<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span>
<span class="Normal">case</span> NEW: <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>empty<span class="Delimiter">()</span> || SIZE<span class="Delimiter">(</span>ingredients<span class="Delimiter">)</span> > <span class="Constant">2</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << current_recipe_name<span class="Delimiter">()</span> << <span class="Constant">": 'new' requires one or two ingredients, but got "</span> << current_instruction<span class="Delimiter">().</span>to_string<span class="Delimiter">()</span> << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!scalar<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 << current_recipe_name<span class="Delimiter">()</span> << <span class="Constant">": first ingredient of 'new' should be a type, but got "</span> << 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>original_string << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Comment">// compute the space we need</span>
<span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> size = <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> array_length = <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Delimiter">{</span>
vector<type_ordinal> type<span class="Delimiter">;</span>
type<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>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>value<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">)</span> > <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Comment">// array</span>
array_length = 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>
trace<span class="Delimiter">(</span>Primitive_recipe_depth<span class="Delimiter">,</span> <span class="Constant">"mem"</span><span class="Delimiter">)</span> << <span class="Constant">"array size is "</span> << array_length << end<span class="Delimiter">();</span>
size = array_length*size_of<span class="Delimiter">(</span>type<span class="Delimiter">)</span> + <span class="Comment">/*</span><span class="Comment">space for length</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">else</span> <span class="Delimiter">{</span>
<span class="Comment">// scalar</span>
size = size_of<span class="Delimiter">(</span>type<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
<span class="CommentedCode">//? Total_alloc += size; //? 1</span>
<span class="CommentedCode">//? Num_alloc++; //? 1</span>
<span class="Comment">// compute the region of memory to return</span>
<span class="Comment">// really crappy at the moment</span>
ensure_space<span class="Delimiter">(</span>size<span class="Delimiter">);</span>
<span class="Normal">const</span> <span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> result = Current_routine<span class="Delimiter">-></span>alloc<span class="Delimiter">;</span>
trace<span class="Delimiter">(</span>Primitive_recipe_depth<span class="Delimiter">,</span> <span class="Constant">"mem"</span><span class="Delimiter">)</span> << <span class="Constant">"new alloc: "</span> << result << end<span class="Delimiter">();</span>
<span class="Comment">// save result</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="Comment">// initialize allocated space</span>
<span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> address = result<span class="Delimiter">;</span> address < result+size<span class="Delimiter">;</span> ++address<span class="Delimiter">)</span> <span class="Delimiter">{</span>
Memory[address] = <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">)</span> > <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
Memory[result] = array_length<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Comment">// bump</span>
Current_routine<span class="Delimiter">-></span>alloc += size<span class="Delimiter">;</span>
<span class="Comment">// no support for reclaiming memory</span>
assert<span class="Delimiter">(</span>Current_routine<span class="Delimiter">-></span>alloc <= Current_routine<span class="Delimiter">-></span>alloc_max<span class="Delimiter">);</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="CommentedCode">//? :(before "End Globals") //? 1</span>
<span class="CommentedCode">//? long long int Total_alloc = 0; //? 1</span>
<span class="CommentedCode">//? long long int Num_alloc = 0; //? 1</span>
<span class="CommentedCode">//? long long int Total_free = 0; //? 1</span>
<span class="CommentedCode">//? long long int Num_free = 0; //? 1</span>
<span class="CommentedCode">//? :(before "End Setup") //? 1</span>
<span class="CommentedCode">//? Total_alloc = Num_alloc = Total_free = Num_free = 0; //? 1</span>
<span class="CommentedCode">//? :(before "End Teardown") //? 1</span>
<span class="CommentedCode">//? cerr << Total_alloc << "/" << Num_alloc //? 1</span>
<span class="CommentedCode">//? << " vs " << Total_free << "/" << Num_free << '\n'; //? 1</span>
<span class="CommentedCode">//? cerr << SIZE(Memory) << '\n'; //? 1</span>
<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> ensure_space<span class="Delimiter">(</span><span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> size<span class="Delimiter">)</span> <span class="Delimiter">{</span>
assert<span class="Delimiter">(</span>size <= Initial_memory_per_routine<span class="Delimiter">);</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>Current_routine<span class="Delimiter">-></span>alloc + size > Current_routine<span class="Delimiter">-></span>alloc_max<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Comment">// waste the remaining space and create a new chunk</span>
Current_routine<span class="Delimiter">-></span>alloc = Memory_allocated_until<span class="Delimiter">;</span>
Memory_allocated_until += Initial_memory_per_routine<span class="Delimiter">;</span>
Current_routine<span class="Delimiter">-></span>alloc_max = Memory_allocated_until<span class="Delimiter">;</span>
trace<span class="Delimiter">(</span>Primitive_recipe_depth<span class="Delimiter">,</span> <span class="Constant">"new"</span><span class="Delimiter">)</span> << <span class="Constant">"routine allocated memory from "</span> << Current_routine<span class="Delimiter">-></span>alloc << <span class="Constant">" to "</span> << Current_routine<span class="Delimiter">-></span>alloc_max << end<span class="Delimiter">();</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(scenario new_initializes)</span>
<span class="Special">% Memory_allocated_until = 10;</span>
<span class="Special">% Memory[Memory_allocated_until] = 1;</span>
recipe main [
<span class="Constant">1</span>:address:number<span class="Special"> <- </span><span class="Normal">new</span> number:type
<span class="Constant">2</span>:number<span class="Special"> <- </span>copy *<span class="Constant">1</span>:address:number
]
<span class="traceContains">+mem: storing 0 in location 2</span>
<span class="Delimiter">:(scenario new_array)</span>
recipe main [
<span class="Constant">1</span>:address:array:number/<span class="Special">raw <- </span><span class="Normal">new</span> number:type<span class="Delimiter">,</span> <span class="Constant">5</span>
<span class="Constant">2</span>:address:number/<span class="Special">raw <- </span><span class="Normal">new</span> number:type
<span class="Constant">3</span>:number/<span class="Special">raw <- </span>subtract <span class="Constant">2</span>:address:number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">1</span>:address:array:number/<span class="Special">raw</span>
]
<span class="traceContains">+run: 1:address:array:number/raw <- new number:type, 5</span>
<span class="traceContains">+mem: array size is 5</span>
<span class="Comment"># don't forget the extra location for array size</span>
<span class="traceContains">+mem: storing 6 in location 3</span>
<span class="Delimiter">:(scenario new_empty_array)</span>
recipe main [
<span class="Constant">1</span>:address:array:number/<span class="Special">raw <- </span><span class="Normal">new</span> number:type<span class="Delimiter">,</span> <span class="Constant">0</span>
<span class="Constant">2</span>:address:number/<span class="Special">raw <- </span><span class="Normal">new</span> number:type
<span class="Constant">3</span>:number/<span class="Special">raw <- </span>subtract <span class="Constant">2</span>:address:number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">1</span>:address:array:number/<span class="Special">raw</span>
]
<span class="traceContains">+run: 1:address:array:number/raw <- new number:type, 0</span>
<span class="traceContains">+mem: array size is 0</span>
<span class="traceContains">+mem: storing 1 in location 3</span>
<span class="Comment">//: Make sure that each routine gets a different alloc to start.</span>
<span class="Delimiter">:(scenario new_concurrent)</span>
recipe f1 [
start-running f2:recipe
<span class="Constant">1</span>:address:number/<span class="Special">raw <- </span><span class="Normal">new</span> number:type
<span class="Comment"># wait for f2 to complete</span>
<span class="Delimiter">{</span>
loop-unless <span class="Constant">4</span>:number/<span class="Special">raw</span>
<span class="Delimiter">}</span>
]
recipe f2 [
<span class="Constant">2</span>:address:number/<span class="Special">raw <- </span><span class="Normal">new</span> number:type
<span class="Comment"># hack: assumes scheduler implementation</span>
<span class="Constant">3</span>:boolean/<span class="Special">raw <- </span>equal <span class="Constant">1</span>:address:number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">2</span>:address:number/<span class="Special">raw</span>
<span class="Comment"># signal f2 complete</span>
<span class="Constant">4</span>:number/<span class="Special">raw <- </span>copy <span class="Constant">1</span>
]
<span class="traceContains">+mem: storing 0 in location 3</span>
<span class="Comment">//: If a routine runs out of its initial allocation, it should allocate more.</span>
<span class="Delimiter">:(scenario new_overflow)</span>
<span class="Special">% Initial_memory_per_routine = 2;</span>
recipe main [
<span class="Constant">1</span>:address:number/<span class="Special">raw <- </span><span class="Normal">new</span> number:type
<span class="Constant">2</span>:address:point/<span class="Special">raw <- </span><span class="Normal">new</span> point:type <span class="Comment"># not enough room in initial page</span>
]
<span class="traceContains">+new: routine allocated memory from 1000 to 1002</span>
<span class="traceContains">+new: routine allocated memory from 1002 to 1004</span>
<span class="Comment">//: We also provide a way to return memory, and to reuse reclaimed memory.</span>
<span class="Comment">//: todo: custodians, etc. Following malloc/free is a temporary hack.</span>
<span class="Delimiter">:(scenario new_reclaim)</span>
recipe main [
<span class="Constant">1</span>:address:number<span class="Special"> <- </span><span class="Normal">new</span> number:type
abandon <span class="Constant">1</span>:address:number
<span class="Constant">2</span>:address:number<span class="Special"> <- </span><span class="Normal">new</span> number:type <span class="Comment"># must be same size as abandoned memory to reuse</span>
<span class="Constant">3</span>:boolean<span class="Special"> <- </span>equal <span class="Constant">1</span>:address:number<span class="Delimiter">,</span> <span class="Constant">2</span>:address:number
]
<span class="Comment"># both allocations should have returned the same address</span>
<span class="traceContains">+mem: storing 1 in location 3</span>
<span class="Delimiter">:(before "End Globals")</span>
map<<span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span><span class="Delimiter">,</span> <span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span>> Free_list<span class="Delimiter">;</span>
<span class="Delimiter">:(before "End Setup")</span>
Free_list<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span>
ABANDON<span class="Delimiter">,</span>
<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span>
Recipe_ordinal[<span class="Constant">"abandon"</span>] = ABANDON<span class="Delimiter">;</span>
<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span>
<span class="Normal">case</span> ABANDON: <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << current_recipe_name<span class="Delimiter">()</span> << <span class="Constant">": 'abandon' requires one ingredient, but got '"</span> << current_instruction<span class="Delimiter">().</span>to_string<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>!scalar<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 << current_recipe_name<span class="Delimiter">()</span> << <span class="Constant">": first ingredient of 'abandon' should be an address, but got "</span> << 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>original_string << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> address = 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>
reagent types = canonize<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">));</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>types<span class="Delimiter">.</span>types<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> != Type_ordinal[<span class="Constant">"address"</span>]<span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << current_recipe_name<span class="Delimiter">()</span> << <span class="Constant">": first ingredient of 'abandon' should be an address, but got "</span> << 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>original_string << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
reagent target_type = lookup_memory<span class="Delimiter">(</span>types<span class="Delimiter">);</span>
abandon<span class="Delimiter">(</span>address<span class="Delimiter">,</span> size_of<span class="Delimiter">(</span>target_type<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">void</span> abandon<span class="Delimiter">(</span><span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> address<span class="Delimiter">,</span> <span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> size<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="CommentedCode">//? Total_free += size; //? 1</span>
<span class="CommentedCode">//? Num_free++; //? 1</span>
<span class="CommentedCode">//? cerr << "abandon: " << size << '\n'; //? 2</span>
<span class="Comment">// clear memory</span>
<span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> curr = address<span class="Delimiter">;</span> curr < address+size<span class="Delimiter">;</span> ++curr<span class="Delimiter">)</span>
Memory[curr] = <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Comment">// append existing free list to address</span>
Memory[address] = Free_list[size]<span class="Delimiter">;</span>
Free_list[size] = address<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before "ensure_space(size)" following "case NEW")</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>Free_list[size]<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> result = Free_list[size]<span class="Delimiter">;</span>
Free_list[size] = Memory[result]<span class="Delimiter">;</span>
<span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> curr = result+<span class="Constant">1</span><span class="Delimiter">;</span> curr < result+size<span class="Delimiter">;</span> ++curr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>Memory[curr] != <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise << current_recipe_name<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> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span> <span class="Comment">// always fatal</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">)</span> > <span class="Constant">1</span><span class="Delimiter">)</span>
Memory[result] = array_length<span class="Delimiter">;</span>
<span class="Normal">else</span>
Memory[result] = <span class="Constant">0</span><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">:(scenario new_differing_size_no_reclaim)</span>
recipe main [
<span class="Constant">1</span>:address:number<span class="Special"> <- </span><span class="Normal">new</span> number:type
abandon <span class="Constant">1</span>:address:number
<span class="Constant">2</span>:address:number<span class="Special"> <- </span><span class="Normal">new</span> number:type<span class="Delimiter">,</span> <span class="Constant">2</span> <span class="Comment"># different size</span>
<span class="Constant">3</span>:boolean<span class="Special"> <- </span>equal <span class="Constant">1</span>:address:number<span class="Delimiter">,</span> <span class="Constant">2</span>:address:number
]
<span class="Comment"># no reuse</span>
<span class="traceContains">+mem: storing 0 in location 3</span>
<span class="Delimiter">:(scenario new_reclaim_array)</span>
recipe main [
<span class="Constant">1</span>:address:array:number<span class="Special"> <- </span><span class="Normal">new</span> number:type<span class="Delimiter">,</span> <span class="Constant">2</span>
abandon <span class="Constant">1</span>:address:array:number
<span class="Constant">2</span>:address:array:number<span class="Special"> <- </span><span class="Normal">new</span> number:type<span class="Delimiter">,</span> <span class="Constant">2</span>
<span class="Constant">3</span>:boolean<span class="Special"> <- </span>equal <span class="Constant">1</span>:address:array:number<span class="Delimiter">,</span> <span class="Constant">2</span>:address:array:number
]
<span class="Comment"># reuse</span>
<span class="traceContains">+mem: storing 1 in location 3</span>
<span class="SalientComment">//:: Next, extend 'new' to handle a unicode string literal argument.</span>
<span class="Delimiter">:(scenario new_string)</span>
recipe main [
<span class="Constant">1</span>:address:array:character<span class="Special"> <- </span><span class="Normal">new</span> [abc def]
<span class="Constant">2</span>:character<span class="Special"> <- </span>index *<span class="Constant">1</span>:address:array:character<span class="Delimiter">,</span> <span class="Constant">5</span>
]
<span class="Comment"># number code for 'e'</span>
<span class="traceContains">+mem: storing 101 in location 2</span>
<span class="Delimiter">:(scenario new_string_handles_unicode)</span>
recipe main [
<span class="Constant">1</span>:address:array:character<span class="Special"> <- </span><span class="Normal">new</span> [a«c]
<span class="Constant">2</span>:number<span class="Special"> <- </span>length *<span class="Constant">1</span>:address:array:character
<span class="Constant">3</span>:character<span class="Special"> <- </span>index *<span class="Constant">1</span>:address:array:character<span class="Delimiter">,</span> <span class="Constant">1</span>
]
<span class="traceContains">+mem: storing 3 in location 2</span>
<span class="Comment"># unicode for '«'</span>
<span class="traceContains">+mem: storing 171 in location 3</span>
<span class="Delimiter">:(before "End NEW Transform Special-cases")</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>empty<span class="Delimiter">()</span>
&& !inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>properties<span class="Delimiter">.</span>empty<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>properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>second<span class="Delimiter">.</span>empty<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>properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>second<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> == <span class="Constant">"literal-string"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Comment">// skip transform</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>initialized = <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="Identifier">goto</span> end_new_transform<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(after "case NEW" following "Primitive Recipe Implementations")</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>is_literal<span class="Delimiter">(</span>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>
&& 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>properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>second<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> == <span class="Constant">"literal-string"</span><span class="Delimiter">)</span> <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>new_mu_string<span class="Delimiter">(</span>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>name<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">long</span> <span class="Normal">long</span> <span class="Normal">int</span> new_mu_string<span class="Delimiter">(</span><span class="Normal">const</span> string& contents<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Comment">// allocate an array just large enough for it</span>
<span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> string_length = unicode_length<span class="Delimiter">(</span>contents<span class="Delimiter">);</span>
<span class="CommentedCode">//? cout << "string_length is " << string_length << '\n'; //? 1</span>
<span class="CommentedCode">//? Total_alloc += string_length+1; //? 1</span>
<span class="CommentedCode">//? Num_alloc++; //? 1</span>
ensure_space<span class="Delimiter">(</span>string_length+<span class="Constant">1</span><span class="Delimiter">);</span> <span class="Comment">// don't forget the extra location for array size</span>
<span class="Comment">// initialize string</span>
<span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> result = Current_routine<span class="Delimiter">-></span>alloc<span class="Delimiter">;</span>
Memory[Current_routine<span class="Delimiter">-></span>alloc++] = string_length<span class="Delimiter">;</span>
<span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> curr = <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Normal">const</span> <span class="Normal">char</span>* raw_contents = contents<span class="Delimiter">.</span>c_str<span class="Delimiter">();</span>
<span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i < string_length<span class="Delimiter">;</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">uint32_t</span> curr_character<span class="Delimiter">;</span>
assert<span class="Delimiter">(</span>curr < SIZE<span class="Delimiter">(</span>contents<span class="Delimiter">));</span>
tb_utf8_char_to_unicode<span class="Delimiter">(</span>&curr_character<span class="Delimiter">,</span> &raw_contents[curr]<span class="Delimiter">);</span>
Memory[Current_routine<span class="Delimiter">-></span>alloc] = curr_character<span class="Delimiter">;</span>
curr += tb_utf8_char_length<span class="Delimiter">(</span>raw_contents[curr]<span class="Delimiter">);</span>
++Current_routine<span class="Delimiter">-></span>alloc<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Comment">// mu strings are not null-terminated in memory</span>
<span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Comment">//: Allocate more to routine when initializing a literal string</span>
<span class="Delimiter">:(scenario new_string_overflow)</span>
<span class="Special">% Initial_memory_per_routine = 2;</span>
recipe main [
<span class="Constant">1</span>:address:number/<span class="Special">raw <- </span><span class="Normal">new</span> number:type
<span class="Constant">2</span>:address:array:character/<span class="Special">raw <- </span><span class="Normal">new</span> [a] <span class="Comment"># not enough room in initial page, if you take the array size into account</span>
]
<span class="traceContains">+new: routine allocated memory from 1000 to 1002</span>
<span class="traceContains">+new: routine allocated memory from 1002 to 1004</span>
<span class="Comment">//: helpers</span>
<span class="Delimiter">:(code)</span>
<span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> unicode_length<span class="Delimiter">(</span><span class="Normal">const</span> string& s<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Normal">const</span> <span class="Normal">char</span>* in = s<span class="Delimiter">.</span>c_str<span class="Delimiter">();</span>
<span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> result = <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> curr = <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Normal">while</span> <span class="Delimiter">(</span>curr < SIZE<span class="Delimiter">(</span>s<span class="Delimiter">))</span> <span class="Delimiter">{</span> <span class="Comment">// carefully bounds-check on the string</span>
<span class="Comment">// before accessing its raw pointer</span>
++result<span class="Delimiter">;</span>
curr += tb_utf8_char_length<span class="Delimiter">(</span>in[curr]<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
</pre>
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