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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>new number:type
<span class="Constant">2</span>:address:number/<span class="Special">raw <- </span>new 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>
long long int Memory_allocated_until = Reserved_for_tests<span class="Delimiter">;</span>
long long int 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>
long long int 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><span class="Constant">9999</span><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">//:: 'new' takes a weird 'type' as its first ingredient; don't error on it</span>
<span class="Delimiter">:(before "End Mu Types Initialization")</span>
put<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">"type"</span><span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">);</span>
<span class="SalientComment">//:: typecheck 'new' instructions</span>
<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span>
NEW<span class="Delimiter">,</span>
<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span>
put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">"new"</span><span class="Delimiter">,</span> NEW<span class="Delimiter">);</span>
<span class="Delimiter">:(before "End Primitive Recipe Checks")</span>
case NEW: <span class="Delimiter">{</span>
if <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>empty<span class="Delimiter">()</span> || SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> > <span class="Constant">2</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise_error << maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> << <span class="Constant">"'new' requires one or two ingredients, but got "</span> << inst<span class="Delimiter">.</span>to_string<span class="Delimiter">()</span> << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Comment">// End NEW Check Special-cases</span>
reagent type = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
if <span class="Delimiter">(</span>!is_mu_type_literal<span class="Delimiter">(</span>type<span class="Delimiter">))</span> <span class="Delimiter">{</span>
raise_error << maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> << <span class="Constant">"first ingredient of 'new' should be a type, but got "</span> << type<span class="Delimiter">.</span>original_string << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="SalientComment">//:: translate 'new' to 'allocate' instructions that take a size instead of a type</span>
<span class="Delimiter">:(after "Transform.push_back(check_instruction)")</span> <span class="Comment">// check_instruction will guard against direct 'allocate' instructions below</span>
Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>transform_new_to_allocate<span class="Delimiter">);</span> <span class="Comment">// idempotent</span>
<span class="Delimiter">:(code)</span>
void transform_new_to_allocate<span class="Delimiter">(</span>const recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
trace<span class="Delimiter">(</span><span class="Constant">9991</span><span class="Delimiter">,</span> <span class="Constant">"transform"</span><span class="Delimiter">)</span> << <span class="Constant">"--- convert 'new' to 'allocate' for recipe "</span> << get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name << end<span class="Delimiter">();</span>
<span class="CommentedCode">//? cerr << "--- convert 'new' to 'allocate' for recipe " << get(Recipe, r).name << '\n';</span>
for <span class="Delimiter">(</span>long long int i = <span class="Constant">0</span><span class="Delimiter">;</span> i < SIZE<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>steps<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
instruction& inst = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
<span class="Comment">// Convert 'new' To 'allocate'</span>
if <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>name == <span class="Constant">"new"</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
inst<span class="Delimiter">.</span>operation = ALLOCATE<span class="Delimiter">;</span>
string_tree* type_name = new string_tree<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>
<span class="Comment">// End Post-processing(type_name) When Converting 'new'</span>
type_tree* type = new_type_tree<span class="Delimiter">(</span>type_name<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>size_of<span class="Delimiter">(</span>type<span class="Delimiter">));</span>
trace<span class="Delimiter">(</span><span class="Constant">9992</span><span class="Delimiter">,</span> <span class="Constant">"new"</span><span class="Delimiter">)</span> << <span class="Constant">"size of "</span> << debug_string<span class="Delimiter">(</span>type_name<span class="Delimiter">)</span> << <span class="Constant">" is "</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>value << end<span class="Delimiter">();</span>
delete type<span class="Delimiter">;</span>
delete type_name<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
<span class="Delimiter">}</span>
<span class="SalientComment">//:: implement 'allocate' based on size</span>
<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span>
ALLOCATE<span class="Delimiter">,</span>
<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span>
put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">"allocate"</span><span class="Delimiter">,</span> ALLOCATE<span class="Delimiter">);</span>
<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span>
case ALLOCATE: <span class="Delimiter">{</span>
<span class="Comment">// compute the space we need</span>
long long int size = 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>
if <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>
<span class="Comment">// array</span>
trace<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">"array size is "</span> << 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> << end<span class="Delimiter">();</span>
size = <span class="Comment">/*</span><span class="Comment">space for length</span><span class="Comment">*/</span><span class="Constant">1</span> + size*ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="CommentedCode">//? Total_alloc += size;</span>
<span class="CommentedCode">//? Num_alloc++;</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>
const long long int result = Current_routine<span class="Delimiter">-></span>alloc<span class="Delimiter">;</span>
trace<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: "</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>
for <span class="Delimiter">(</span>long long int address = result<span class="Delimiter">;</span> address < result+size<span class="Delimiter">;</span> ++address<span class="Delimiter">)</span>
put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> address<span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">);</span>
<span class="Comment">// initialize array length</span>
if <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>
put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> result<span class="Delimiter">,</span> ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">));</span>
<span class="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="SalientComment">//:: ensure we never call 'allocate' directly; its types are not checked</span>
<span class="Delimiter">:(before "End Primitive Recipe Checks")</span>
case ALLOCATE: <span class="Delimiter">{</span>
raise << <span class="Constant">"never call 'allocate' directly'; always use 'new'</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="SalientComment">//:: ensure we never call 'new' without translating it (unless we add special-cases later)</span>
<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span>
case NEW: <span class="Delimiter">{</span>
raise << <span class="Constant">"no implementation for 'new'; why wasn't it translated to 'allocate'?</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="CommentedCode">//? :(before "End Globals")</span>
<span class="CommentedCode">//? long long int Total_alloc = 0;</span>
<span class="CommentedCode">//? long long int Num_alloc = 0;</span>
<span class="CommentedCode">//? long long int Total_free = 0;</span>
<span class="CommentedCode">//? long long int Num_free = 0;</span>
<span class="CommentedCode">//? :(before "End Setup")</span>
<span class="CommentedCode">//? Total_alloc = Num_alloc = Total_free = Num_free = 0;</span>
<span class="CommentedCode">//? :(before "End Teardown")</span>
<span class="CommentedCode">//? cerr << Total_alloc << "/" << Num_alloc</span>
<span class="CommentedCode">//? << " vs " << Total_free << "/" << Num_free << '\n';</span>
<span class="CommentedCode">//? cerr << SIZE(Memory) << '\n';</span>
<span class="Delimiter">:(code)</span>
void ensure_space<span class="Delimiter">(</span>long long int size<span class="Delimiter">)</span> <span class="Delimiter">{</span>
if <span class="Delimiter">(</span>size > Initial_memory_per_routine<span class="Delimiter">)</span> <span class="Delimiter">{</span>
tb_shutdown<span class="Delimiter">();</span>
cerr << <span class="Constant">"can't allocate "</span> << size << <span class="Constant">" locations, that's too much.</span><span class="cSpecial">\n</span><span class="Constant">"</span><span class="Delimiter">;</span>
exit<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
<span class="Delimiter">}</span>
if <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><span class="Constant">9999</span><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">% put(Memory, Memory_allocated_until, 1);</span>
recipe main [
<span class="Constant">1</span>:address:number<span class="Special"> <- </span>new 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>new number:type<span class="Delimiter">,</span> <span class="Constant">5</span>
<span class="Constant">2</span>:address:number/<span class="Special">raw <- </span>new 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>new number:type<span class="Delimiter">,</span> <span class="Constant">0</span>
<span class="Constant">2</span>:address:number/<span class="Special">raw <- </span>new 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>new 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>new 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>new number:type
<span class="Constant">2</span>:address:point/<span class="Special">raw <- </span>new 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>new number:type
abandon <span class="Constant">1</span>:address:number
<span class="Constant">2</span>:address:number<span class="Special"> <- </span>new 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<long long int<span class="Delimiter">,</span> long long int> 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>
put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">"abandon"</span><span class="Delimiter">,</span> ABANDON<span class="Delimiter">);</span>
<span class="Delimiter">:(before "End Primitive Recipe Checks")</span>
case ABANDON: <span class="Delimiter">{</span>
if <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
raise_error << maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> << <span class="Constant">"'abandon' requires one ingredient, but got '"</span> << inst<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>
reagent types = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
canonize_type<span class="Delimiter">(</span>types<span class="Delimiter">);</span>
if <span class="Delimiter">(</span>!types<span class="Delimiter">.</span>type || types<span class="Delimiter">.</span>type<span class="Delimiter">-></span>value != get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">"address"</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
raise_error << maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> << <span class="Constant">"first ingredient of 'abandon' should be an address, but got "</span> << inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string << <span class="cSpecial">'\n'</span> << end<span class="Delimiter">();</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span>
case ABANDON: <span class="Delimiter">{</span>
long long int 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 = current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
canonize<span class="Delimiter">(</span>types<span class="Delimiter">);</span>
<span class="Comment">// lookup_memory without drop_one_lookup {</span>
types<span class="Delimiter">.</span>set_value<span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> types<span class="Delimiter">.</span>value<span class="Delimiter">));</span>
drop_address_from_type<span class="Delimiter">(</span>types<span class="Delimiter">);</span>
<span class="Comment">// }</span>
abandon<span class="Delimiter">(</span>address<span class="Delimiter">,</span> size_of<span class="Delimiter">(</span>types<span class="Delimiter">));</span>
<span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(code)</span>
void abandon<span class="Delimiter">(</span>long long int address<span class="Delimiter">,</span> long long int size<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="CommentedCode">//? Total_free += size;</span>
<span class="CommentedCode">//? Num_free++;</span>
<span class="CommentedCode">//? cerr << "abandon: " << size << '\n';</span>
<span class="Comment">// clear memory</span>
for <span class="Delimiter">(</span>long long int curr = address<span class="Delimiter">;</span> curr < address+size<span class="Delimiter">;</span> ++curr<span class="Delimiter">)</span>
put<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="Comment">// append existing free list to address</span>
put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> address<span class="Delimiter">,</span> 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 ALLOCATE")</span>
if <span class="Delimiter">(</span>Free_list[size]<span class="Delimiter">)</span> <span class="Delimiter">{</span>
long long int result = Free_list[size]<span class="Delimiter">;</span>
Free_list[size] = get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> result<span class="Delimiter">);</span>
for <span class="Delimiter">(</span>long long int 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>
if <span class="Delimiter">(</span>get_or_insert<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>
raise_error << maybe<span class="Delimiter">(</span>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>
if <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>
put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> result<span class="Delimiter">,</span> 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>
else
put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> result<span class="Delimiter">,</span> <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>new number:type
abandon <span class="Constant">1</span>:address:number
<span class="Constant">2</span>:address:number<span class="Special"> <- </span>new 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>new 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>new 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>new [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>new [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 Check Special-cases")</span>
if <span class="Delimiter">(</span>is_literal_string<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">:(before "Convert 'new' To 'allocate'")</span>
if <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>name == <span class="Constant">"new"</span> && is_literal_string<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span class="Delimiter">:(after "case NEW" following "Primitive Recipe Implementations")</span>
if <span class="Delimiter">(</span>is_literal_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> <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>
long long int new_mu_string<span class="Delimiter">(</span>const string& contents<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="Comment">// allocate an array just large enough for it</span>
long long int string_length = unicode_length<span class="Delimiter">(</span>contents<span class="Delimiter">);</span>
<span class="CommentedCode">//? Total_alloc += string_length+1;</span>
<span class="CommentedCode">//? Num_alloc++;</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>
long long int result = Current_routine<span class="Delimiter">-></span>alloc<span class="Delimiter">;</span>
put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> Current_routine<span class="Delimiter">-></span>alloc++<span class="Delimiter">,</span> string_length<span class="Delimiter">);</span>
long long int curr = <span class="Constant">0</span><span class="Delimiter">;</span>
const char* raw_contents = contents<span class="Delimiter">.</span>c_str<span class="Delimiter">();</span>
for <span class="Delimiter">(</span>long long int 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>
uint32_t 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>
put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> Current_routine<span class="Delimiter">-></span>alloc<span class="Delimiter">,</span> 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">//: pass in commandline args as ingredients to main</span>
<span class="Comment">//: todo: test this</span>
<span class="Delimiter">:(after "Update main_routine")</span>
Current_routine = main_routine<span class="Delimiter">;</span>
for <span class="Delimiter">(</span>long long int i = <span class="Constant">1</span><span class="Delimiter">;</span> i < argc<span class="Delimiter">;</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
vector<double> arg<span class="Delimiter">;</span>
arg<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>new_mu_string<span class="Delimiter">(</span>argv[i]<span class="Delimiter">));</span>
current_call<span class="Delimiter">().</span>ingredient_atoms<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>arg<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Comment">//: stash recognizes strings</span>
<span class="Delimiter">:(scenario stash_string)</span>
recipe main [
x:address:array:character<span class="Special"> <- </span>new [abc]
stash [foo:]<span class="Delimiter">,</span> x:address:array:character
]
<span class="traceContains">+app: foo: abc</span>
<span class="Delimiter">:(before "End print Special-cases(reagent r, data)")</span>
if <span class="Delimiter">(</span>is_mu_string<span class="Delimiter">(</span>r<span class="Delimiter">))</span> <span class="Delimiter">{</span>
assert<span class="Delimiter">(</span>scalar<span class="Delimiter">(</span>data<span class="Delimiter">));</span>
<span class="Identifier">return</span> read_mu_string<span class="Delimiter">(</span>data<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">));</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(scenario unicode_string)</span>
recipe main [
x:address:array:character<span class="Special"> <- </span>new [♠]
stash [foo:]<span class="Delimiter">,</span> x:address:array:character
]
<span class="traceContains">+app: foo: ♠</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>new number:type
<span class="Constant">2</span>:address:array:character/<span class="Special">raw <- </span>new [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>
long long int unicode_length<span class="Delimiter">(</span>const string& s<span class="Delimiter">)</span> <span class="Delimiter">{</span>
const char* in = s<span class="Delimiter">.</span>c_str<span class="Delimiter">();</span>
long long int result = <span class="Constant">0</span><span class="Delimiter">;</span>
long long int curr = <span class="Constant">0</span><span class="Delimiter">;</span>
while <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>
string read_mu_string<span class="Delimiter">(</span>long long int address<span class="Delimiter">)</span> <span class="Delimiter">{</span>
long long int size = get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> address<span class="Delimiter">);</span>
if <span class="Delimiter">(</span>size == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">""</span><span class="Delimiter">;</span>
ostringstream tmp<span class="Delimiter">;</span>
for <span class="Delimiter">(</span>long long int curr = address+<span class="Constant">1</span><span class="Delimiter">;</span> curr <= address+size<span class="Delimiter">;</span> ++curr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
tmp << to_unicode<span class="Delimiter">(</span>static_cast<uint32_t><span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> curr<span class="Delimiter">)));</span>
<span class="Delimiter">}</span>
<span class="Identifier">return</span> tmp<span class="Delimiter">.</span>str<span class="Delimiter">();</span>
<span class="Delimiter">}</span>
bool is_mu_type_literal<span class="Delimiter">(</span>reagent r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="CommentedCode">//? if (!r.properties.empty())</span>
<span class="CommentedCode">//? dump_property(r.properties.at(0).second, cerr);</span>
<span class="Identifier">return</span> is_literal<span class="Delimiter">(</span>r<span class="Delimiter">)</span> && !r<span class="Delimiter">.</span>properties<span class="Delimiter">.</span>empty<span class="Delimiter">()</span> && r<span class="Delimiter">.</span>properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>second && r<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>value == <span class="Constant">"type"</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
</pre>
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