source: src/Concurrency/Keywords.cc@ 09d4b22

ADT arm-eh ast-experimental enum forall-pointer-decay jacob/cs343-translation jenkins-sandbox new-ast new-ast-unique-expr pthread-emulation qualifiedEnum
Last change on this file since 09d4b22 was 6c3a5ac1, checked in by Thierry Delisle <tdelisle@…>, 6 years ago

Added better check to guarantee proper includes are present when using concurrency keywords
  • Property mode set to 100644
File size: 22.9 KB
Line 
1//
2// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// Keywords.cc --
8//
9// Author : Thierry Delisle
10// Created On : Mon Mar 13 12:41:22 2017
11// Last Modified By :
12// Last Modified On :
13// Update Count : 5
14//
15
16#include "Concurrency/Keywords.h"
17
18#include <cassert> // for assert
19#include <string> // for string, operator==
20
21#include "Common/PassVisitor.h" // for PassVisitor
22#include "Common/SemanticError.h" // for SemanticError
23#include "Common/utility.h" // for deleteAll, map_range
24#include "CodeGen/OperatorTable.h" // for isConstructor
25#include "InitTweak/InitTweak.h" // for getPointerBase
26#include "Parser/LinkageSpec.h" // for Cforall
27#include "SynTree/Constant.h" // for Constant
28#include "SynTree/Declaration.h" // for StructDecl, FunctionDecl, ObjectDecl
29#include "SynTree/Expression.h" // for VariableExpr, ConstantExpr, Untype...
30#include "SynTree/Initializer.h" // for SingleInit, ListInit, Initializer ...
31#include "SynTree/Label.h" // for Label
32#include "SynTree/Statement.h" // for CompoundStmt, DeclStmt, ExprStmt
33#include "SynTree/Type.h" // for StructInstType, Type, PointerType
34#include "SynTree/Visitor.h" // for Visitor, acceptAll
35
36class Attribute;
37
38namespace Concurrency {
39 //=============================================================================================
40 // Pass declarations
41 //=============================================================================================
42
43 //-----------------------------------------------------------------------------
44 //Handles sue type declarations :
45 // sue MyType { struct MyType {
46 // int data; int data;
47 // a_struct_t more_data; a_struct_t more_data;
48 // => NewField_t newField;
49 // }; };
50 // static inline NewField_t * getter_name( MyType * this ) { return &this->newField; }
51 //
52 class ConcurrentSueKeyword : public WithDeclsToAdd {
53 public:
54
55 ConcurrentSueKeyword( std::string&& type_name, std::string&& field_name, std::string&& getter_name, std::string&& context_error, bool needs_main, KeywordCastExpr::Target cast_target ) :
56 type_name( type_name ), field_name( field_name ), getter_name( getter_name ), context_error( context_error ), needs_main( needs_main ), cast_target( cast_target ) {}
57
58 virtual ~ConcurrentSueKeyword() {}
59
60 Declaration * postmutate( StructDecl * decl );
61 DeclarationWithType * postmutate( FunctionDecl * decl );
62
63 void handle( StructDecl * );
64 FunctionDecl * forwardDeclare( StructDecl * );
65 ObjectDecl * addField( StructDecl * );
66 void addRoutines( ObjectDecl *, FunctionDecl * );
67
68 virtual bool is_target( StructDecl * decl ) = 0;
69
70 Expression * postmutate( KeywordCastExpr * cast );
71
72 private:
73 const std::string type_name;
74 const std::string field_name;
75 const std::string getter_name;
76 const std::string context_error;
77 bool needs_main;
78 KeywordCastExpr::Target cast_target;
79
80 StructDecl * type_decl = nullptr;
81 FunctionDecl * dtor_decl = nullptr;
82 };
83
84
85 //-----------------------------------------------------------------------------
86 //Handles thread type declarations :
87 // thread Mythread { struct MyThread {
88 // int data; int data;
89 // a_struct_t more_data; a_struct_t more_data;
90 // => thread_desc __thrd_d;
91 // }; };
92 // static inline thread_desc * get_thread( MyThread * this ) { return &this->__thrd_d; }
93 //
94 class ThreadKeyword final : public ConcurrentSueKeyword {
95 public:
96
97 ThreadKeyword() : ConcurrentSueKeyword(
98 "thread_desc",
99 "__thrd",
100 "get_thread",
101 "thread keyword requires threads to be in scope, add #include <thread.hfa>\n",
102 true,
103 KeywordCastExpr::Thread
104 )
105 {}
106
107 virtual ~ThreadKeyword() {}
108
109 virtual bool is_target( StructDecl * decl ) override final { return decl->is_thread(); }
110
111 static void implement( std::list< Declaration * > & translationUnit ) {
112 PassVisitor< ThreadKeyword > impl;
113 mutateAll( translationUnit, impl );
114 }
115 };
116
117 //-----------------------------------------------------------------------------
118 //Handles coroutine type declarations :
119 // coroutine MyCoroutine { struct MyCoroutine {
120 // int data; int data;
121 // a_struct_t more_data; a_struct_t more_data;
122 // => coroutine_desc __cor_d;
123 // }; };
124 // static inline coroutine_desc * get_coroutine( MyCoroutine * this ) { return &this->__cor_d; }
125 //
126 class CoroutineKeyword final : public ConcurrentSueKeyword {
127 public:
128
129 CoroutineKeyword() : ConcurrentSueKeyword(
130 "coroutine_desc",
131 "__cor",
132 "get_coroutine",
133 "coroutine keyword requires coroutines to be in scope, add #include <coroutine.hfa>\n",
134 true,
135 KeywordCastExpr::Coroutine
136 )
137 {}
138
139 virtual ~CoroutineKeyword() {}
140
141 virtual bool is_target( StructDecl * decl ) override final { return decl->is_coroutine(); }
142
143 static void implement( std::list< Declaration * > & translationUnit ) {
144 PassVisitor< CoroutineKeyword > impl;
145 mutateAll( translationUnit, impl );
146 }
147 };
148
149 //-----------------------------------------------------------------------------
150 //Handles monitor type declarations :
151 // monitor MyMonitor { struct MyMonitor {
152 // int data; int data;
153 // a_struct_t more_data; a_struct_t more_data;
154 // => monitor_desc __mon_d;
155 // }; };
156 // static inline monitor_desc * get_coroutine( MyMonitor * this ) { return &this->__cor_d; }
157 //
158 class MonitorKeyword final : public ConcurrentSueKeyword {
159 public:
160
161 MonitorKeyword() : ConcurrentSueKeyword(
162 "monitor_desc",
163 "__mon",
164 "get_monitor",
165 "monitor keyword requires monitors to be in scope, add #include <monitor.hfa>\n",
166 false,
167 KeywordCastExpr::Monitor
168 )
169 {}
170
171 virtual ~MonitorKeyword() {}
172
173 virtual bool is_target( StructDecl * decl ) override final { return decl->is_monitor(); }
174
175 static void implement( std::list< Declaration * > & translationUnit ) {
176 PassVisitor< MonitorKeyword > impl;
177 mutateAll( translationUnit, impl );
178 }
179 };
180
181 //-----------------------------------------------------------------------------
182 //Handles mutex routines definitions :
183 // void foo( A * mutex a, B * mutex b, int i ) { void foo( A * a, B * b, int i ) {
184 // monitor_desc * __monitors[] = { get_monitor(a), get_monitor(b) };
185 // monitor_guard_t __guard = { __monitors, 2 };
186 // /*Some code*/ => /*Some code*/
187 // } }
188 //
189 class MutexKeyword final {
190 public:
191
192 void postvisit( FunctionDecl * decl );
193 void postvisit( StructDecl * decl );
194
195 std::list<DeclarationWithType*> findMutexArgs( FunctionDecl*, bool & first );
196 void validate( DeclarationWithType * );
197 void addDtorStatments( FunctionDecl* func, CompoundStmt *, const std::list<DeclarationWithType * > &);
198 void addStatments( FunctionDecl* func, CompoundStmt *, const std::list<DeclarationWithType * > &);
199
200 static void implement( std::list< Declaration * > & translationUnit ) {
201 PassVisitor< MutexKeyword > impl;
202 acceptAll( translationUnit, impl );
203 }
204
205 private:
206 StructDecl* monitor_decl = nullptr;
207 StructDecl* guard_decl = nullptr;
208 StructDecl* dtor_guard_decl = nullptr;
209
210 static std::unique_ptr< Type > generic_func;
211 };
212
213 std::unique_ptr< Type > MutexKeyword::generic_func = std::unique_ptr< Type >(
214 new FunctionType(
215 noQualifiers,
216 true
217 )
218 );
219
220 //-----------------------------------------------------------------------------
221 //Handles mutex routines definitions :
222 // void foo( A * mutex a, B * mutex b, int i ) { void foo( A * a, B * b, int i ) {
223 // monitor_desc * __monitors[] = { get_monitor(a), get_monitor(b) };
224 // monitor_guard_t __guard = { __monitors, 2 };
225 // /*Some code*/ => /*Some code*/
226 // } }
227 //
228 class ThreadStarter final {
229 public:
230
231 void postvisit( FunctionDecl * decl );
232 void previsit ( StructDecl * decl );
233
234 void addStartStatement( FunctionDecl * decl, DeclarationWithType * param );
235
236 static void implement( std::list< Declaration * > & translationUnit ) {
237 PassVisitor< ThreadStarter > impl;
238 acceptAll( translationUnit, impl );
239 }
240
241 private :
242 bool thread_ctor_seen = false;
243 StructDecl * thread_decl = nullptr;
244 };
245
246 //=============================================================================================
247 // General entry routine
248 //=============================================================================================
249 void applyKeywords( std::list< Declaration * > & translationUnit ) {
250 ThreadKeyword ::implement( translationUnit );
251 CoroutineKeyword ::implement( translationUnit );
252 MonitorKeyword ::implement( translationUnit );
253 }
254
255 void implementMutexFuncs( std::list< Declaration * > & translationUnit ) {
256 MutexKeyword ::implement( translationUnit );
257 }
258
259 void implementThreadStarter( std::list< Declaration * > & translationUnit ) {
260 ThreadStarter ::implement( translationUnit );
261 }
262
263 //=============================================================================================
264 // Generic keyword implementation
265 //=============================================================================================
266 void fixupGenerics(FunctionType * func, StructDecl * decl) {
267 cloneAll(decl->parameters, func->forall);
268 for ( TypeDecl * td : func->forall ) {
269 strict_dynamic_cast<StructInstType*>(
270 func->parameters.front()->get_type()->stripReferences()
271 )->parameters.push_back(
272 new TypeExpr( new TypeInstType( noQualifiers, td->name, td ) )
273 );
274 }
275 }
276
277 Declaration * ConcurrentSueKeyword::postmutate(StructDecl * decl) {
278 if( decl->name == type_name && decl->body ) {
279 assert( !type_decl );
280 type_decl = decl;
281 }
282 else if ( is_target(decl) ) {
283 handle( decl );
284 }
285 return decl;
286 }
287
288 DeclarationWithType * ConcurrentSueKeyword::postmutate( FunctionDecl * decl ) {
289 if( !type_decl ) return decl;
290 if( !CodeGen::isDestructor( decl->name ) ) return decl;
291
292 auto params = decl->type->parameters;
293 if( params.size() != 1 ) return decl;
294
295 auto type = dynamic_cast<ReferenceType*>( params.front()->get_type() );
296 if( !type ) return decl;
297
298 auto stype = dynamic_cast<StructInstType*>( type->base );
299 if( !stype ) return decl;
300 if( stype->baseStruct != type_decl ) return decl;
301
302 if( !dtor_decl ) dtor_decl = decl;
303 return decl;
304 }
305
306 Expression * ConcurrentSueKeyword::postmutate( KeywordCastExpr * cast ) {
307 if ( cast_target == cast->target ) {
308 // convert (thread &)t to (thread_desc &)*get_thread(t), etc.
309 if( !type_decl ) SemanticError( cast, context_error );
310 if( !dtor_decl ) SemanticError( cast, context_error );
311 Expression * arg = cast->arg;
312 cast->arg = nullptr;
313 delete cast;
314 return new CastExpr(
315 UntypedExpr::createDeref(
316 new UntypedExpr( new NameExpr( getter_name ), { arg } )
317 ),
318 new ReferenceType(
319 noQualifiers,
320 new StructInstType( noQualifiers, type_decl ) )
321 );
322 }
323 return cast;
324 }
325
326
327 void ConcurrentSueKeyword::handle( StructDecl * decl ) {
328 if( ! decl->body ) return;
329
330 if( !type_decl ) SemanticError( decl, context_error );
331 if( !dtor_decl ) SemanticError( decl, context_error );
332
333 FunctionDecl * func = forwardDeclare( decl );
334 ObjectDecl * field = addField( decl );
335 addRoutines( field, func );
336 }
337
338 FunctionDecl * ConcurrentSueKeyword::forwardDeclare( StructDecl * decl ) {
339
340 StructDecl * forward = decl->clone();
341 forward->set_body( false );
342 deleteAll( forward->get_members() );
343 forward->get_members().clear();
344
345 FunctionType * get_type = new FunctionType( noQualifiers, false );
346 ObjectDecl * this_decl = new ObjectDecl(
347 "this",
348 noStorageClasses,
349 LinkageSpec::Cforall,
350 nullptr,
351 new ReferenceType(
352 noQualifiers,
353 new StructInstType(
354 noQualifiers,
355 decl
356 )
357 ),
358 nullptr
359 );
360
361 get_type->get_parameters().push_back( this_decl->clone() );
362 get_type->get_returnVals().push_back(
363 new ObjectDecl(
364 "ret",
365 noStorageClasses,
366 LinkageSpec::Cforall,
367 nullptr,
368 new PointerType(
369 noQualifiers,
370 new StructInstType(
371 noQualifiers,
372 type_decl
373 )
374 ),
375 nullptr
376 )
377 );
378 fixupGenerics(get_type, decl);
379
380 FunctionDecl * get_decl = new FunctionDecl(
381 getter_name,
382 Type::Static,
383 LinkageSpec::Cforall,
384 get_type,
385 nullptr,
386 noAttributes,
387 Type::Inline
388 );
389
390 FunctionDecl * main_decl = nullptr;
391
392 if( needs_main ) {
393 FunctionType * main_type = new FunctionType( noQualifiers, false );
394
395 main_type->get_parameters().push_back( this_decl->clone() );
396
397 main_decl = new FunctionDecl(
398 "main",
399 noStorageClasses,
400 LinkageSpec::Cforall,
401 main_type,
402 nullptr
403 );
404 fixupGenerics(main_type, decl);
405 }
406
407 delete this_decl;
408
409 declsToAddBefore.push_back( forward );
410 if( needs_main ) declsToAddBefore.push_back( main_decl );
411 declsToAddBefore.push_back( get_decl );
412
413 return get_decl;
414 }
415
416 ObjectDecl * ConcurrentSueKeyword::addField( StructDecl * decl ) {
417 ObjectDecl * field = new ObjectDecl(
418 field_name,
419 noStorageClasses,
420 LinkageSpec::Cforall,
421 nullptr,
422 new StructInstType(
423 noQualifiers,
424 type_decl
425 ),
426 nullptr
427 );
428
429 decl->get_members().push_back( field );
430
431 return field;
432 }
433
434 void ConcurrentSueKeyword::addRoutines( ObjectDecl * field, FunctionDecl * func ) {
435 CompoundStmt * statement = new CompoundStmt();
436 statement->push_back(
437 new ReturnStmt(
438 new AddressExpr(
439 new MemberExpr(
440 field,
441 new CastExpr(
442 new VariableExpr( func->get_functionType()->get_parameters().front() ),
443 func->get_functionType()->get_parameters().front()->get_type()->stripReferences()->clone()
444 )
445 )
446 )
447 )
448 );
449
450 FunctionDecl * get_decl = func->clone();
451
452 get_decl->set_statements( statement );
453
454 declsToAddAfter.push_back( get_decl );
455
456 // get_decl->fixUniqueId();
457 }
458
459 //=============================================================================================
460 // Mutex keyword implementation
461 //=============================================================================================
462
463 void MutexKeyword::postvisit(FunctionDecl* decl) {
464
465 bool first = false;
466 std::list<DeclarationWithType*> mutexArgs = findMutexArgs( decl, first );
467 bool isDtor = CodeGen::isDestructor( decl->name );
468
469 // Is this function relevant to monitors
470 if( mutexArgs.empty() ) {
471 // If this is the destructor for a monitor it must be mutex
472 if(isDtor) {
473 Type* ty = decl->get_functionType()->get_parameters().front()->get_type();
474
475 // If it's a copy, it's not a mutex
476 ReferenceType* rty = dynamic_cast< ReferenceType * >( ty );
477 if( ! rty ) return;
478
479 // If we are not pointing directly to a type, it's not a mutex
480 Type* base = rty->get_base();
481 if( dynamic_cast< ReferenceType * >( base ) ) return;
482 if( dynamic_cast< PointerType * >( base ) ) return;
483
484 // Check if its a struct
485 StructInstType * baseStruct = dynamic_cast< StructInstType * >( base );
486 if( !baseStruct ) return;
487
488 // Check if its a monitor
489 if(baseStruct->baseStruct->is_monitor() || baseStruct->baseStruct->is_thread())
490 SemanticError( decl, "destructors for structures declared as \"monitor\" must use mutex parameters\n" );
491 }
492 return;
493 }
494
495 // Monitors can't be constructed with mutual exclusion
496 if( CodeGen::isConstructor(decl->name) && !first ) SemanticError( decl, "constructors cannot have mutex parameters" );
497
498 // It makes no sense to have multiple mutex parameters for the destructor
499 if( isDtor && mutexArgs.size() != 1 ) SemanticError( decl, "destructors can only have 1 mutex argument" );
500
501 // Make sure all the mutex arguments are monitors
502 for(auto arg : mutexArgs) {
503 validate( arg );
504 }
505
506 // Check if we need to instrument the body
507 CompoundStmt* body = decl->get_statements();
508 if( ! body ) return;
509
510 // Do we have the required headers
511 if( !monitor_decl || !guard_decl || !dtor_guard_decl )
512 SemanticError( decl, "mutex keyword requires monitors to be in scope, add #include <monitor.hfa>\n" );
513
514 // Instrument the body
515 if( isDtor ) {
516 addDtorStatments( decl, body, mutexArgs );
517 }
518 else {
519 addStatments( decl, body, mutexArgs );
520 }
521 }
522
523 void MutexKeyword::postvisit(StructDecl* decl) {
524
525 if( decl->name == "monitor_desc" && decl->body ) {
526 assert( !monitor_decl );
527 monitor_decl = decl;
528 }
529 else if( decl->name == "monitor_guard_t" && decl->body ) {
530 assert( !guard_decl );
531 guard_decl = decl;
532 }
533 else if( decl->name == "monitor_dtor_guard_t" && decl->body ) {
534 assert( !dtor_guard_decl );
535 dtor_guard_decl = decl;
536 }
537 }
538
539 std::list<DeclarationWithType*> MutexKeyword::findMutexArgs( FunctionDecl* decl, bool & first ) {
540 std::list<DeclarationWithType*> mutexArgs;
541
542 bool once = true;
543 for( auto arg : decl->get_functionType()->get_parameters()) {
544 //Find mutex arguments
545 Type* ty = arg->get_type();
546 if( ! ty->get_mutex() ) continue;
547
548 if(once) {first = true;}
549 once = false;
550
551 //Append it to the list
552 mutexArgs.push_back( arg );
553 }
554
555 return mutexArgs;
556 }
557
558 void MutexKeyword::validate( DeclarationWithType * arg ) {
559 Type* ty = arg->get_type();
560
561 //Makes sure it's not a copy
562 ReferenceType* rty = dynamic_cast< ReferenceType * >( ty );
563 if( ! rty ) SemanticError( arg, "Mutex argument must be of reference type " );
564
565 //Make sure the we are pointing directly to a type
566 Type* base = rty->get_base();
567 if( dynamic_cast< ReferenceType * >( base ) ) SemanticError( arg, "Mutex argument have exactly one level of indirection " );
568 if( dynamic_cast< PointerType * >( base ) ) SemanticError( arg, "Mutex argument have exactly one level of indirection " );
569
570 //Make sure that typed isn't mutex
571 if( base->get_mutex() ) SemanticError( arg, "mutex keyword may only appear once per argument " );
572 }
573
574 void MutexKeyword::addDtorStatments( FunctionDecl* func, CompoundStmt * body, const std::list<DeclarationWithType * > & args ) {
575 Type * arg_type = args.front()->get_type()->clone();
576 arg_type->set_mutex( false );
577
578 ObjectDecl * monitors = new ObjectDecl(
579 "__monitor",
580 noStorageClasses,
581 LinkageSpec::Cforall,
582 nullptr,
583 new PointerType(
584 noQualifiers,
585 new StructInstType(
586 noQualifiers,
587 monitor_decl
588 )
589 ),
590 new SingleInit( new UntypedExpr(
591 new NameExpr( "get_monitor" ),
592 { new CastExpr( new VariableExpr( args.front() ), arg_type ) }
593 ))
594 );
595
596 assert(generic_func);
597
598 //in reverse order :
599 // monitor_dtor_guard_t __guard = { __monitors, func };
600 body->push_front(
601 new DeclStmt( new ObjectDecl(
602 "__guard",
603 noStorageClasses,
604 LinkageSpec::Cforall,
605 nullptr,
606 new StructInstType(
607 noQualifiers,
608 dtor_guard_decl
609 ),
610 new ListInit(
611 {
612 new SingleInit( new AddressExpr( new VariableExpr( monitors ) ) ),
613 new SingleInit( new CastExpr( new VariableExpr( func ), generic_func->clone() ) )
614 },
615 noDesignators,
616 true
617 )
618 ))
619 );
620
621 //monitor_desc * __monitors[] = { get_monitor(a), get_monitor(b) };
622 body->push_front( new DeclStmt( monitors) );
623 }
624
625 void MutexKeyword::addStatments( FunctionDecl* func, CompoundStmt * body, const std::list<DeclarationWithType * > & args ) {
626 ObjectDecl * monitors = new ObjectDecl(
627 "__monitors",
628 noStorageClasses,
629 LinkageSpec::Cforall,
630 nullptr,
631 new ArrayType(
632 noQualifiers,
633 new PointerType(
634 noQualifiers,
635 new StructInstType(
636 noQualifiers,
637 monitor_decl
638 )
639 ),
640 new ConstantExpr( Constant::from_ulong( args.size() ) ),
641 false,
642 false
643 ),
644 new ListInit(
645 map_range < std::list<Initializer*> > ( args, [](DeclarationWithType * var ){
646 Type * type = var->get_type()->clone();
647 type->set_mutex( false );
648 return new SingleInit( new UntypedExpr(
649 new NameExpr( "get_monitor" ),
650 { new CastExpr( new VariableExpr( var ), type ) }
651 ) );
652 })
653 )
654 );
655
656 assert(generic_func);
657
658 // in reverse order :
659 // monitor_guard_t __guard = { __monitors, #, func };
660 body->push_front(
661 new DeclStmt( new ObjectDecl(
662 "__guard",
663 noStorageClasses,
664 LinkageSpec::Cforall,
665 nullptr,
666 new StructInstType(
667 noQualifiers,
668 guard_decl
669 ),
670 new ListInit(
671 {
672 new SingleInit( new VariableExpr( monitors ) ),
673 new SingleInit( new ConstantExpr( Constant::from_ulong( args.size() ) ) ),
674 new SingleInit( new CastExpr( new VariableExpr( func ), generic_func->clone() ) )
675 },
676 noDesignators,
677 true
678 )
679 ))
680 );
681
682 //monitor_desc * __monitors[] = { get_monitor(a), get_monitor(b) };
683 body->push_front( new DeclStmt( monitors) );
684 }
685
686 //=============================================================================================
687 // General entry routine
688 //=============================================================================================
689 void ThreadStarter::previsit( StructDecl * decl ) {
690 if( decl->name == "thread_desc" && decl->body ) {
691 assert( !thread_decl );
692 thread_decl = decl;
693 }
694 }
695
696 void ThreadStarter::postvisit(FunctionDecl * decl) {
697 if( ! CodeGen::isConstructor(decl->name) ) return;
698
699 Type * typeof_this = InitTweak::getTypeofThis(decl->type);
700 StructInstType * ctored_type = dynamic_cast< StructInstType * >( typeof_this );
701 if( ctored_type && ctored_type->baseStruct == thread_decl ) {
702 thread_ctor_seen = true;
703 }
704
705 DeclarationWithType * param = decl->get_functionType()->get_parameters().front();
706 auto type = dynamic_cast< StructInstType * >( InitTweak::getPointerBase( param->get_type() ) );
707 if( type && type->get_baseStruct()->is_thread() ) {
708 if( !thread_decl || !thread_ctor_seen ) {
709 SemanticError( type->get_baseStruct()->location, "thread keyword requires threads to be in scope, add #include <thread.hfa>");
710 }
711
712 addStartStatement( decl, param );
713 }
714 }
715
716 void ThreadStarter::addStartStatement( FunctionDecl * decl, DeclarationWithType * param ) {
717 CompoundStmt * stmt = decl->get_statements();
718
719 if( ! stmt ) return;
720
721 stmt->push_back(
722 new ExprStmt(
723 new UntypedExpr(
724 new NameExpr( "__thrd_start" ),
725 { new VariableExpr( param ) }
726 )
727 )
728 );
729 }
730};
731
732// Local Variables: //
733// mode: c //
734// tab-width: 4 //
735// End: //
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