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source: src/Concurrency/Keywords.cc @ 9e63a2b

ADTarm-ehast-experimentalenumforall-pointer-decayjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprpthread-emulationqualifiedEnum

Last change on this file since 9e63a2b was 07de76b, checked in by Peter A. Buhr <pabuhr@…>, 5 years ago
remove file TypeVar?.h* and put TypeVar::Kind into TypeDecl?, move LinkageSpec?.* from directory Parse to SynTree?
Property mode set to `100644`
File size: 22.8 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 : 10
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 "SynTree/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
36	class Attribute;
37
38	namespace 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, AggregateDecl::Aggregate 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	AggregateDecl::Aggregate 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	AggregateDecl::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	AggregateDecl::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	AggregateDecl::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	assert( cast->result == nullptr );
312	cast->set_result( new ReferenceType( noQualifiers, new StructInstType( noQualifiers, type_decl ) ) );
313	cast->concrete_target.field = field_name;
314	cast->concrete_target.getter = getter_name;
315	}
316	return cast;
317	}
318
319
320	void ConcurrentSueKeyword::handle( StructDecl * decl ) {
321	if( ! decl->body ) return;
322
323	if( !type_decl ) SemanticError( decl, context_error );
324	if( !dtor_decl ) SemanticError( decl, context_error );
325
326	FunctionDecl * func = forwardDeclare( decl );
327	ObjectDecl * field = addField( decl );
328	addRoutines( field, func );
329	}
330
331	FunctionDecl * ConcurrentSueKeyword::forwardDeclare( StructDecl * decl ) {
332
333	StructDecl * forward = decl->clone();
334	forward->set_body( false );
335	deleteAll( forward->get_members() );
336	forward->get_members().clear();
337
338	FunctionType * get_type = new FunctionType( noQualifiers, false );
339	ObjectDecl * this_decl = new ObjectDecl(
340	"this",
341	noStorageClasses,
342	LinkageSpec::Cforall,
343	nullptr,
344	new ReferenceType(
345	noQualifiers,
346	new StructInstType(
347	noQualifiers,
348	decl
349	)
350	),
351	nullptr
352	);
353
354	get_type->get_parameters().push_back( this_decl->clone() );
355	get_type->get_returnVals().push_back(
356	new ObjectDecl(
357	"ret",
358	noStorageClasses,
359	LinkageSpec::Cforall,
360	nullptr,
361	new PointerType(
362	noQualifiers,
363	new StructInstType(
364	noQualifiers,
365	type_decl
366	)
367	),
368	nullptr
369	)
370	);
371	fixupGenerics(get_type, decl);
372
373	FunctionDecl * get_decl = new FunctionDecl(
374	getter_name,
375	Type::Static,
376	LinkageSpec::Cforall,
377	get_type,
378	nullptr,
379	noAttributes,
380	Type::Inline
381	);
382
383	FunctionDecl * main_decl = nullptr;
384
385	if( needs_main ) {
386	FunctionType * main_type = new FunctionType( noQualifiers, false );
387
388	main_type->get_parameters().push_back( this_decl->clone() );
389
390	main_decl = new FunctionDecl(
391	"main",
392	noStorageClasses,
393	LinkageSpec::Cforall,
394	main_type,
395	nullptr
396	);
397	fixupGenerics(main_type, decl);
398	}
399
400	delete this_decl;
401
402	declsToAddBefore.push_back( forward );
403	if( needs_main ) declsToAddBefore.push_back( main_decl );
404	declsToAddBefore.push_back( get_decl );
405
406	return get_decl;
407	}
408
409	ObjectDecl * ConcurrentSueKeyword::addField( StructDecl * decl ) {
410	ObjectDecl * field = new ObjectDecl(
411	field_name,
412	noStorageClasses,
413	LinkageSpec::Cforall,
414	nullptr,
415	new StructInstType(
416	noQualifiers,
417	type_decl
418	),
419	nullptr
420	);
421
422	decl->get_members().push_back( field );
423
424	return field;
425	}
426
427	void ConcurrentSueKeyword::addRoutines( ObjectDecl * field, FunctionDecl * func ) {
428	CompoundStmt * statement = new CompoundStmt();
429	statement->push_back(
430	new ReturnStmt(
431	new AddressExpr(
432	new MemberExpr(
433	field,
434	new CastExpr(
435	new VariableExpr( func->get_functionType()->get_parameters().front() ),
436	func->get_functionType()->get_parameters().front()->get_type()->stripReferences()->clone()
437	)
438	)
439	)
440	)
441	);
442
443	FunctionDecl * get_decl = func->clone();
444
445	get_decl->set_statements( statement );
446
447	declsToAddAfter.push_back( get_decl );
448
449	// get_decl->fixUniqueId();
450	}
451
452	//=============================================================================================
453	// Mutex keyword implementation
454	//=============================================================================================
455
456	void MutexKeyword::postvisit(FunctionDecl* decl) {
457
458	bool first = false;
459	std::list<DeclarationWithType*> mutexArgs = findMutexArgs( decl, first );
460	bool isDtor = CodeGen::isDestructor( decl->name );
461
462	// Is this function relevant to monitors
463	if( mutexArgs.empty() ) {
464	// If this is the destructor for a monitor it must be mutex
465	if(isDtor) {
466	Type* ty = decl->get_functionType()->get_parameters().front()->get_type();
467
468	// If it's a copy, it's not a mutex
469	ReferenceType* rty = dynamic_cast< ReferenceType * >( ty );
470	if( ! rty ) return;
471
472	// If we are not pointing directly to a type, it's not a mutex
473	Type* base = rty->get_base();
474	if( dynamic_cast< ReferenceType * >( base ) ) return;
475	if( dynamic_cast< PointerType * >( base ) ) return;
476
477	// Check if its a struct
478	StructInstType * baseStruct = dynamic_cast< StructInstType * >( base );
479	if( !baseStruct ) return;
480
481	// Check if its a monitor
482	if(baseStruct->baseStruct->is_monitor() \|\| baseStruct->baseStruct->is_thread())
483	SemanticError( decl, "destructors for structures declared as \"monitor\" must use mutex parameters\n" );
484	}
485	return;
486	}
487
488	// Monitors can't be constructed with mutual exclusion
489	if( CodeGen::isConstructor(decl->name) && !first ) SemanticError( decl, "constructors cannot have mutex parameters" );
490
491	// It makes no sense to have multiple mutex parameters for the destructor
492	if( isDtor && mutexArgs.size() != 1 ) SemanticError( decl, "destructors can only have 1 mutex argument" );
493
494	// Make sure all the mutex arguments are monitors
495	for(auto arg : mutexArgs) {
496	validate( arg );
497	}
498
499	// Check if we need to instrument the body
500	CompoundStmt* body = decl->get_statements();
501	if( ! body ) return;
502
503	// Do we have the required headers
504	if( !monitor_decl \|\| !guard_decl \|\| !dtor_guard_decl )
505	SemanticError( decl, "mutex keyword requires monitors to be in scope, add #include <monitor.hfa>\n" );
506
507	// Instrument the body
508	if( isDtor ) {
509	addDtorStatments( decl, body, mutexArgs );
510	}
511	else {
512	addStatments( decl, body, mutexArgs );
513	}
514	}
515
516	void MutexKeyword::postvisit(StructDecl* decl) {
517
518	if( decl->name == "monitor_desc" && decl->body ) {
519	assert( !monitor_decl );
520	monitor_decl = decl;
521	}
522	else if( decl->name == "monitor_guard_t" && decl->body ) {
523	assert( !guard_decl );
524	guard_decl = decl;
525	}
526	else if( decl->name == "monitor_dtor_guard_t" && decl->body ) {
527	assert( !dtor_guard_decl );
528	dtor_guard_decl = decl;
529	}
530	}
531
532	std::list<DeclarationWithType> MutexKeyword::findMutexArgs( FunctionDecl decl, bool & first ) {
533	std::list<DeclarationWithType*> mutexArgs;
534
535	bool once = true;
536	for( auto arg : decl->get_functionType()->get_parameters()) {
537	//Find mutex arguments
538	Type* ty = arg->get_type();
539	if( ! ty->get_mutex() ) continue;
540
541	if(once) {first = true;}
542	once = false;
543
544	//Append it to the list
545	mutexArgs.push_back( arg );
546	}
547
548	return mutexArgs;
549	}
550
551	void MutexKeyword::validate( DeclarationWithType * arg ) {
552	Type* ty = arg->get_type();
553
554	//Makes sure it's not a copy
555	ReferenceType* rty = dynamic_cast< ReferenceType * >( ty );
556	if( ! rty ) SemanticError( arg, "Mutex argument must be of reference type " );
557
558	//Make sure the we are pointing directly to a type
559	Type* base = rty->get_base();
560	if( dynamic_cast< ReferenceType * >( base ) ) SemanticError( arg, "Mutex argument have exactly one level of indirection " );
561	if( dynamic_cast< PointerType * >( base ) ) SemanticError( arg, "Mutex argument have exactly one level of indirection " );
562
563	//Make sure that typed isn't mutex
564	if( base->get_mutex() ) SemanticError( arg, "mutex keyword may only appear once per argument " );
565	}
566
567	void MutexKeyword::addDtorStatments( FunctionDecl* func, CompoundStmt * body, const std::list<DeclarationWithType * > & args ) {
568	Type * arg_type = args.front()->get_type()->clone();
569	arg_type->set_mutex( false );
570
571	ObjectDecl * monitors = new ObjectDecl(
572	"__monitor",
573	noStorageClasses,
574	LinkageSpec::Cforall,
575	nullptr,
576	new PointerType(
577	noQualifiers,
578	new StructInstType(
579	noQualifiers,
580	monitor_decl
581	)
582	),
583	new SingleInit( new UntypedExpr(
584	new NameExpr( "get_monitor" ),
585	{ new CastExpr( new VariableExpr( args.front() ), arg_type ) }
586	))
587	);
588
589	assert(generic_func);
590
591	//in reverse order :
592	// monitor_dtor_guard_t __guard = { __monitors, func };
593	body->push_front(
594	new DeclStmt( new ObjectDecl(
595	"__guard",
596	noStorageClasses,
597	LinkageSpec::Cforall,
598	nullptr,
599	new StructInstType(
600	noQualifiers,
601	dtor_guard_decl
602	),
603	new ListInit(
604	{
605	new SingleInit( new AddressExpr( new VariableExpr( monitors ) ) ),
606	new SingleInit( new CastExpr( new VariableExpr( func ), generic_func->clone() ) )
607	},
608	noDesignators,
609	true
610	)
611	))
612	);
613
614	//monitor_desc * __monitors[] = { get_monitor(a), get_monitor(b) };
615	body->push_front( new DeclStmt( monitors) );
616	}
617
618	void MutexKeyword::addStatments( FunctionDecl* func, CompoundStmt * body, const std::list<DeclarationWithType * > & args ) {
619	ObjectDecl * monitors = new ObjectDecl(
620	"__monitors",
621	noStorageClasses,
622	LinkageSpec::Cforall,
623	nullptr,
624	new ArrayType(
625	noQualifiers,
626	new PointerType(
627	noQualifiers,
628	new StructInstType(
629	noQualifiers,
630	monitor_decl
631	)
632	),
633	new ConstantExpr( Constant::from_ulong( args.size() ) ),
634	false,
635	false
636	),
637	new ListInit(
638	map_range < std::list<Initializer> > ( args, [](DeclarationWithType var ){
639	Type * type = var->get_type()->clone();
640	type->set_mutex( false );
641	return new SingleInit( new UntypedExpr(
642	new NameExpr( "get_monitor" ),
643	{ new CastExpr( new VariableExpr( var ), type ) }
644	) );
645	})
646	)
647	);
648
649	assert(generic_func);
650
651	// in reverse order :
652	// monitor_guard_t __guard = { __monitors, #, func };
653	body->push_front(
654	new DeclStmt( new ObjectDecl(
655	"__guard",
656	noStorageClasses,
657	LinkageSpec::Cforall,
658	nullptr,
659	new StructInstType(
660	noQualifiers,
661	guard_decl
662	),
663	new ListInit(
664	{
665	new SingleInit( new VariableExpr( monitors ) ),
666	new SingleInit( new ConstantExpr( Constant::from_ulong( args.size() ) ) ),
667	new SingleInit( new CastExpr( new VariableExpr( func ), generic_func->clone() ) )
668	},
669	noDesignators,
670	true
671	)
672	))
673	);
674
675	//monitor_desc * __monitors[] = { get_monitor(a), get_monitor(b) };
676	body->push_front( new DeclStmt( monitors) );
677	}
678
679	//=============================================================================================
680	// General entry routine
681	//=============================================================================================
682	void ThreadStarter::previsit( StructDecl * decl ) {
683	if( decl->name == "thread_desc" && decl->body ) {
684	assert( !thread_decl );
685	thread_decl = decl;
686	}
687	}
688
689	void ThreadStarter::postvisit(FunctionDecl * decl) {
690	if( ! CodeGen::isConstructor(decl->name) ) return;
691
692	Type * typeof_this = InitTweak::getTypeofThis(decl->type);
693	StructInstType * ctored_type = dynamic_cast< StructInstType * >( typeof_this );
694	if( ctored_type && ctored_type->baseStruct == thread_decl ) {
695	thread_ctor_seen = true;
696	}
697
698	DeclarationWithType * param = decl->get_functionType()->get_parameters().front();
699	auto type = dynamic_cast< StructInstType * >( InitTweak::getPointerBase( param->get_type() ) );
700	if( type && type->get_baseStruct()->is_thread() ) {
701	if( !thread_decl \|\| !thread_ctor_seen ) {
702	SemanticError( type->get_baseStruct()->location, "thread keyword requires threads to be in scope, add #include <thread.hfa>");
703	}
704
705	addStartStatement( decl, param );
706	}
707	}
708
709	void ThreadStarter::addStartStatement( FunctionDecl * decl, DeclarationWithType * param ) {
710	CompoundStmt * stmt = decl->get_statements();
711
712	if( ! stmt ) return;
713
714	stmt->push_back(
715	new ExprStmt(
716	new UntypedExpr(
717	new NameExpr( "__thrd_start" ),
718	{ new VariableExpr( param ) }
719	)
720	)
721	);
722	}
723	};
724
725	// Local Variables: //
726	// mode: c //
727	// tab-width: 4 //
728	// End: //

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