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source: src/Concurrency/Keywords.cc@ 6fa409e

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Last change on this file since 6fa409e was 28f3a19, checked in by Aaron Moss <a3moss@…>, 7 years ago
Merge branch 'master' into with_gc
Property mode set to `100644`
File size: 21.9 KB

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[64adb03]	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 :
[6b0b624]	13	// Update Count : 5
[64adb03]	14	//
	15
	16	#include "Concurrency/Keywords.h"
	17
[bf2438c]	18	#include <cassert> // for assert
	19	#include <string> // for string, operator==
	20
[bd06384]	21	#include "Common/GC.h" // for new_static_root
[2065609]	22	#include "Common/PassVisitor.h" // for PassVisitor
[bf2438c]	23	#include "Common/SemanticError.h" // for SemanticError
	24	#include "Common/utility.h" // for deleteAll, map_range
[bff227f]	25	#include "CodeGen/OperatorTable.h" // for isConstructor
	26	#include "InitTweak/InitTweak.h" // for getPointerBase
[bf2438c]	27	#include "Parser/LinkageSpec.h" // for Cforall
	28	#include "SynTree/Constant.h" // for Constant
	29	#include "SynTree/Declaration.h" // for StructDecl, FunctionDecl, ObjectDecl
	30	#include "SynTree/Expression.h" // for VariableExpr, ConstantExpr, Untype...
	31	#include "SynTree/Initializer.h" // for SingleInit, ListInit, Initializer ...
	32	#include "SynTree/Label.h" // for Label
	33	#include "SynTree/Statement.h" // for CompoundStmt, DeclStmt, ExprStmt
	34	#include "SynTree/Type.h" // for StructInstType, Type, PointerType
	35	#include "SynTree/Visitor.h" // for Visitor, acceptAll
	36
	37	class Attribute;
[64adb03]	38
	39	namespace Concurrency {
	40	//=============================================================================================
[2065609]	41	// Pass declarations
[64adb03]	42	//=============================================================================================
	43
[bcda04c]	44	//-----------------------------------------------------------------------------
	45	//Handles sue type declarations :
	46	// sue MyType { struct MyType {
	47	// int data; int data;
	48	// a_struct_t more_data; a_struct_t more_data;
	49	// => NewField_t newField;
	50	// }; };
	51	// static inline NewField_t * getter_name( MyType * this ) { return &this->newField; }
	52	//
[2065609]	53	class ConcurrentSueKeyword : public WithDeclsToAdd {
[bcda04c]	54	public:
	55
[9a705dc8]	56	ConcurrentSueKeyword( std::string&& type_name, std::string&& field_name, std::string&& getter_name, std::string&& context_error, bool needs_main, KeywordCastExpr::Target cast_target ) :
	57	type_name( type_name ), field_name( field_name ), getter_name( getter_name ), context_error( context_error ), needs_main( needs_main ), cast_target( cast_target ) {}
[bcda04c]	58
	59	virtual ~ConcurrentSueKeyword() {}
	60
[9a705dc8]	61	Declaration * postmutate( StructDecl * decl );
[bcda04c]	62
	63	void handle( StructDecl * );
	64	FunctionDecl * forwardDeclare( StructDecl * );
	65	ObjectDecl * addField( StructDecl * );
[2f9a722]	66	void addRoutines( ObjectDecl , FunctionDecl );
[bcda04c]	67
	68	virtual bool is_target( StructDecl * decl ) = 0;
	69
[9a705dc8]	70	Expression * postmutate( KeywordCastExpr * cast );
	71
[bcda04c]	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;
[bd4d011]	77	bool needs_main;
[9a705dc8]	78	KeywordCastExpr::Target cast_target;
[bcda04c]	79
	80	StructDecl* type_decl = nullptr;
	81	};
	82
	83
[64adb03]	84	//-----------------------------------------------------------------------------
	85	//Handles thread type declarations :
	86	// thread Mythread { struct MyThread {
	87	// int data; int data;
	88	// a_struct_t more_data; a_struct_t more_data;
	89	// => thread_desc __thrd_d;
	90	// }; };
	91	// static inline thread_desc * get_thread( MyThread * this ) { return &this->__thrd_d; }
	92	//
[bcda04c]	93	class ThreadKeyword final : public ConcurrentSueKeyword {
[64adb03]	94	public:
	95
[bcda04c]	96	ThreadKeyword() : ConcurrentSueKeyword(
	97	"thread_desc",
	98	"__thrd",
	99	"get_thread",
[bd4d011]	100	"thread keyword requires threads to be in scope, add #include <thread>",
[9a705dc8]	101	true,
	102	KeywordCastExpr::Thread
[bcda04c]	103	)
	104	{}
	105
	106	virtual ~ThreadKeyword() {}
	107
	108	virtual bool is_target( StructDecl * decl ) override final { return decl->is_thread(); }
	109
	110	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	111	PassVisitor< ThreadKeyword > impl;
[9a705dc8]	112	mutateAll( translationUnit, impl );
[bcda04c]	113	}
[64adb03]	114	};
	115
	116	//-----------------------------------------------------------------------------
	117	//Handles coroutine type declarations :
	118	// coroutine MyCoroutine { struct MyCoroutine {
	119	// int data; int data;
	120	// a_struct_t more_data; a_struct_t more_data;
	121	// => coroutine_desc __cor_d;
	122	// }; };
	123	// static inline coroutine_desc * get_coroutine( MyCoroutine * this ) { return &this->__cor_d; }
	124	//
[bcda04c]	125	class CoroutineKeyword final : public ConcurrentSueKeyword {
[64adb03]	126	public:
	127
[bcda04c]	128	CoroutineKeyword() : ConcurrentSueKeyword(
	129	"coroutine_desc",
	130	"__cor",
	131	"get_coroutine",
[bd4d011]	132	"coroutine keyword requires coroutines to be in scope, add #include <coroutine>",
[9a705dc8]	133	true,
	134	KeywordCastExpr::Coroutine
[bcda04c]	135	)
	136	{}
[b32ada31]	137
[bcda04c]	138	virtual ~CoroutineKeyword() {}
	139
	140	virtual bool is_target( StructDecl * decl ) override final { return decl->is_coroutine(); }
[b32ada31]	141
	142	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	143	PassVisitor< CoroutineKeyword > impl;
[9a705dc8]	144	mutateAll( translationUnit, impl );
[b32ada31]	145	}
[64adb03]	146	};
	147
	148	//-----------------------------------------------------------------------------
	149	//Handles monitor type declarations :
	150	// monitor MyMonitor { struct MyMonitor {
	151	// int data; int data;
	152	// a_struct_t more_data; a_struct_t more_data;
	153	// => monitor_desc __mon_d;
	154	// }; };
	155	// static inline monitor_desc * get_coroutine( MyMonitor * this ) { return &this->__cor_d; }
	156	//
[bcda04c]	157	class MonitorKeyword final : public ConcurrentSueKeyword {
[64adb03]	158	public:
	159
[bcda04c]	160	MonitorKeyword() : ConcurrentSueKeyword(
	161	"monitor_desc",
	162	"__mon",
	163	"get_monitor",
[bd4d011]	164	"monitor keyword requires monitors to be in scope, add #include <monitor>",
[9a705dc8]	165	false,
	166	KeywordCastExpr::Monitor
[bcda04c]	167	)
	168	{}
	169
	170	virtual ~MonitorKeyword() {}
	171
	172	virtual bool is_target( StructDecl * decl ) override final { return decl->is_monitor(); }
	173
	174	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	175	PassVisitor< MonitorKeyword > impl;
[9a705dc8]	176	mutateAll( translationUnit, impl );
[bcda04c]	177	}
[64adb03]	178	};
	179
	180	//-----------------------------------------------------------------------------
	181	//Handles mutex routines definitions :
	182	// void foo( A * mutex a, B * mutex b, int i ) { void foo( A * a, B * b, int i ) {
[9243cc91]	183	// monitor_desc * __monitors[] = { get_monitor(a), get_monitor(b) };
[64adb03]	184	// monitor_guard_t __guard = { __monitors, 2 };
	185	// /Some code/ => /Some code/
	186	// } }
	187	//
[2065609]	188	class MutexKeyword final {
[64adb03]	189	public:
	190
[2065609]	191	void postvisit( FunctionDecl * decl );
	192	void postvisit( StructDecl * decl );
[64adb03]	193
[db4d8e3]	194	std::list<DeclarationWithType> findMutexArgs( FunctionDecl, bool & first );
[64adb03]	195	void validate( DeclarationWithType * );
[549c006]	196	void addDtorStatments( FunctionDecl* func, CompoundStmt , const std::list<DeclarationWithType > &);
[97e3296]	197	void addStatments( FunctionDecl* func, CompoundStmt , const std::list<DeclarationWithType > &);
[64adb03]	198
	199	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	200	PassVisitor< MutexKeyword > impl;
[64adb03]	201	acceptAll( translationUnit, impl );
	202	}
[9243cc91]	203
	204	private:
	205	StructDecl* monitor_decl = nullptr;
[ef42b143]	206	StructDecl* guard_decl = nullptr;
[549c006]	207	StructDecl* dtor_guard_decl = nullptr;
[97e3296]	208
[8d7bef2]	209	static Type* generic_func;
[64adb03]	210	};
	211
[bd06384]	212	Type* MutexKeyword::generic_func = new_static_root<FunctionType>( noQualifiers, true );
[97e3296]	213
[bd4d011]	214	//-----------------------------------------------------------------------------
	215	//Handles mutex routines definitions :
	216	// void foo( A * mutex a, B * mutex b, int i ) { void foo( A * a, B * b, int i ) {
	217	// monitor_desc * __monitors[] = { get_monitor(a), get_monitor(b) };
	218	// monitor_guard_t __guard = { __monitors, 2 };
	219	// /Some code/ => /Some code/
	220	// } }
	221	//
[2065609]	222	class ThreadStarter final {
[bd4d011]	223	public:
	224
[2065609]	225	void postvisit( FunctionDecl * decl );
[549c006]	226	void previsit ( StructDecl * decl );
[bd4d011]	227
	228	void addStartStatement( FunctionDecl * decl, DeclarationWithType * param );
	229
	230	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	231	PassVisitor< ThreadStarter > impl;
[bd4d011]	232	acceptAll( translationUnit, impl );
	233	}
[549c006]	234
	235	private :
	236	bool thread_ctor_seen = false;
	237	StructDecl * thread_decl = nullptr;
[bd4d011]	238	};
	239
[64adb03]	240	//=============================================================================================
	241	// General entry routine
	242	//=============================================================================================
	243	void applyKeywords( std::list< Declaration * > & translationUnit ) {
	244	ThreadKeyword ::implement( translationUnit );
	245	CoroutineKeyword ::implement( translationUnit );
	246	MonitorKeyword ::implement( translationUnit );
[bcda04c]	247	}
	248
	249	void implementMutexFuncs( std::list< Declaration * > & translationUnit ) {
[64adb03]	250	MutexKeyword ::implement( translationUnit );
	251	}
	252
[bcda04c]	253	void implementThreadStarter( std::list< Declaration * > & translationUnit ) {
[bd4d011]	254	ThreadStarter ::implement( translationUnit );
[bcda04c]	255	}
	256
[b32ada31]	257	//=============================================================================================
[bcda04c]	258	// Generic keyword implementation
[b32ada31]	259	//=============================================================================================
[2db79e5]	260	void fixupGenerics(FunctionType * func, StructDecl * decl) {
	261	cloneAll(decl->parameters, func->forall);
	262	for ( TypeDecl * td : func->forall ) {
	263	strict_dynamic_cast<StructInstType*>(
	264	func->parameters.front()->get_type()->stripReferences()
	265	)->parameters.push_back(
	266	new TypeExpr( new TypeInstType( noQualifiers, td->name, td ) )
	267	);
	268	}
	269	}
	270
[9a705dc8]	271	Declaration * ConcurrentSueKeyword::postmutate(StructDecl * decl) {
[9f5ecf5]	272	if( decl->name == type_name && decl->body ) {
[bcda04c]	273	assert( !type_decl );
	274	type_decl = decl;
[b32ada31]	275	}
[bcda04c]	276	else if ( is_target(decl) ) {
[b32ada31]	277	handle( decl );
	278	}
[9a705dc8]	279	return decl;
[b32ada31]	280	}
	281
[9a705dc8]	282	Expression * ConcurrentSueKeyword::postmutate( KeywordCastExpr * cast ) {
	283	if ( cast_target == cast->target ) {
	284	// convert (thread &)t to (thread_desc &)*get_thread(t), etc.
	285	if( !type_decl ) SemanticError( cast, context_error );
	286	return new CastExpr(
	287	UntypedExpr::createDeref(
[42107b4]	288	new UntypedExpr( new NameExpr( getter_name ), { cast->arg } )
[9a705dc8]	289	),
	290	new ReferenceType(
	291	noQualifiers,
	292	new StructInstType( noQualifiers, type_decl ) )
	293	);
	294	}
	295	return cast;
	296	}
	297
	298
[bcda04c]	299	void ConcurrentSueKeyword::handle( StructDecl * decl ) {
[9f5ecf5]	300	if( ! decl->body ) return;
[b32ada31]	301
[a16764a6]	302	if( !type_decl ) SemanticError( decl, context_error );
[b32ada31]	303
[bcda04c]	304	FunctionDecl * func = forwardDeclare( decl );
	305	ObjectDecl * field = addField( decl );
[2f9a722]	306	addRoutines( field, func );
[b32ada31]	307	}
	308
[bcda04c]	309	FunctionDecl * ConcurrentSueKeyword::forwardDeclare( StructDecl * decl ) {
	310
	311	StructDecl * forward = decl->clone();
	312	forward->set_body( false );
	313	forward->get_members().clear();
	314
[bd4d011]	315	FunctionType * get_type = new FunctionType( noQualifiers, false );
[bcda04c]	316	ObjectDecl * this_decl = new ObjectDecl(
	317	"this",
[ba3706f]	318	noStorageClasses,
[b32ada31]	319	LinkageSpec::Cforall,
	320	nullptr,
[83a071f9]	321	new ReferenceType(
[b32ada31]	322	noQualifiers,
[bcda04c]	323	new StructInstType(
	324	noQualifiers,
	325	decl
	326	)
[b32ada31]	327	),
	328	nullptr
	329	);
	330
[2db79e5]	331	get_type->get_parameters().push_back( this_decl->clone() );
[bd4d011]	332	get_type->get_returnVals().push_back(
[e04b636]	333	new ObjectDecl(
	334	"ret",
[ba3706f]	335	noStorageClasses,
[e04b636]	336	LinkageSpec::Cforall,
	337	nullptr,
	338	new PointerType(
	339	noQualifiers,
	340	new StructInstType(
	341	noQualifiers,
[bcda04c]	342	type_decl
[e04b636]	343	)
	344	),
	345	nullptr
	346	)
	347	);
[2db79e5]	348	fixupGenerics(get_type, decl);
[b32ada31]	349
[bcda04c]	350	FunctionDecl * get_decl = new FunctionDecl(
	351	getter_name,
	352	Type::Static,
	353	LinkageSpec::Cforall,
[bd4d011]	354	get_type,
[bcda04c]	355	nullptr,
	356	noAttributes,
	357	Type::Inline
	358	);
	359
[bd4d011]	360	FunctionDecl * main_decl = nullptr;
	361
	362	if( needs_main ) {
	363	FunctionType * main_type = new FunctionType( noQualifiers, false );
[bf2438c]	364
[bd4d011]	365	main_type->get_parameters().push_back( this_decl->clone() );
	366
	367	main_decl = new FunctionDecl(
	368	"main",
[ba3706f]	369	noStorageClasses,
[bd4d011]	370	LinkageSpec::Cforall,
	371	main_type,
	372	nullptr
	373	);
[2db79e5]	374	fixupGenerics(main_type, decl);
[bd4d011]	375	}
	376
[2065609]	377	declsToAddBefore.push_back( forward );
	378	if( needs_main ) declsToAddBefore.push_back( main_decl );
	379	declsToAddBefore.push_back( get_decl );
[bcda04c]	380
	381	return get_decl;
	382	}
	383
	384	ObjectDecl * ConcurrentSueKeyword::addField( StructDecl * decl ) {
	385	ObjectDecl * field = new ObjectDecl(
	386	field_name,
[ba3706f]	387	noStorageClasses,
[bcda04c]	388	LinkageSpec::Cforall,
	389	nullptr,
	390	new StructInstType(
	391	noQualifiers,
	392	type_decl
	393	),
	394	nullptr
	395	);
	396
	397	decl->get_members().push_back( field );
	398
	399	return field;
	400	}
	401
[2f9a722]	402	void ConcurrentSueKeyword::addRoutines( ObjectDecl * field, FunctionDecl * func ) {
[ba3706f]	403	CompoundStmt * statement = new CompoundStmt();
[bf2438c]	404	statement->push_back(
[b32ada31]	405	new ReturnStmt(
[e04b636]	406	new AddressExpr(
[bcda04c]	407	new MemberExpr(
	408	field,
[2db79e5]	409	new CastExpr(
	410	new VariableExpr( func->get_functionType()->get_parameters().front() ),
	411	func->get_functionType()->get_parameters().front()->get_type()->stripReferences()->clone()
	412	)
[e04b636]	413	)
[b32ada31]	414	)
	415	)
	416	);
	417
[bcda04c]	418	FunctionDecl * get_decl = func->clone();
	419
	420	get_decl->set_statements( statement );
[e04b636]	421
	422	declsToAddAfter.push_back( get_decl );
	423
[bcda04c]	424	// get_decl->fixUniqueId();
[b32ada31]	425	}
	426
[64adb03]	427	//=============================================================================================
	428	// Mutex keyword implementation
	429	//=============================================================================================
[97e3296]	430
[2065609]	431	void MutexKeyword::postvisit(FunctionDecl* decl) {
[102a58b]	432
[db4d8e3]	433	bool first = false;
	434	std::list<DeclarationWithType*> mutexArgs = findMutexArgs( decl, first );
[ceedde6]	435	bool isDtor = CodeGen::isDestructor( decl->name );
[64adb03]	436
[ceedde6]	437	// Is this function relevant to monitors
	438	if( mutexArgs.empty() ) {
	439	// If this is the destructor for a monitor it must be mutex
	440	if(isDtor) {
	441	Type* ty = decl->get_functionType()->get_parameters().front()->get_type();
	442
	443	// If it's a copy, it's not a mutex
	444	ReferenceType* rty = dynamic_cast< ReferenceType * >( ty );
	445	if( ! rty ) return;
	446
	447	// If we are not pointing directly to a type, it's not a mutex
	448	Type* base = rty->get_base();
	449	if( dynamic_cast< ReferenceType * >( base ) ) return;
	450	if( dynamic_cast< PointerType * >( base ) ) return;
	451
	452	// Check if its a struct
	453	StructInstType * baseStruct = dynamic_cast< StructInstType * >( base );
	454	if( !baseStruct ) return;
	455
	456	// Check if its a monitor
	457	if(baseStruct->baseStruct->is_monitor() \|\| baseStruct->baseStruct->is_thread())
	458	SemanticError( decl, "destructors for structures declared as \"monitor\" must use mutex parameters\n" );
	459	}
	460	return;
	461	}
[549c006]	462
[ceedde6]	463	// Monitors can't be constructed with mutual exclusion
	464	if( CodeGen::isConstructor(decl->name) && !first ) SemanticError( decl, "constructors cannot have mutex parameters" );
[549c006]	465
[ceedde6]	466	// It makes no sense to have multiple mutex parameters for the destructor
[a16764a6]	467	if( isDtor && mutexArgs.size() != 1 ) SemanticError( decl, "destructors can only have 1 mutex argument" );
[549c006]	468
[ceedde6]	469	// Make sure all the mutex arguments are monitors
[64adb03]	470	for(auto arg : mutexArgs) {
	471	validate( arg );
	472	}
	473
[ceedde6]	474	// Check if we need to instrument the body
[64adb03]	475	CompoundStmt* body = decl->get_statements();
	476	if( ! body ) return;
	477
[ceedde6]	478	// Do we have the required headers
[a16764a6]	479	if( !monitor_decl \|\| !guard_decl \|\| !dtor_guard_decl )
[ceedde6]	480	SemanticError( decl, "mutex keyword requires monitors to be in scope, add #include <monitor>\n" );
[b32ada31]	481
[ceedde6]	482	// Instrument the body
[549c006]	483	if( isDtor ) {
	484	addDtorStatments( decl, body, mutexArgs );
	485	}
	486	else {
	487	addStatments( decl, body, mutexArgs );
	488	}
[64adb03]	489	}
	490
[2065609]	491	void MutexKeyword::postvisit(StructDecl* decl) {
[102a58b]	492
[9f5ecf5]	493	if( decl->name == "monitor_desc" ) {
[9243cc91]	494	assert( !monitor_decl );
	495	monitor_decl = decl;
	496	}
[9f5ecf5]	497	else if( decl->name == "monitor_guard_t" ) {
[ef42b143]	498	assert( !guard_decl );
	499	guard_decl = decl;
	500	}
[549c006]	501	else if( decl->name == "monitor_dtor_guard_t" ) {
	502	assert( !dtor_guard_decl );
	503	dtor_guard_decl = decl;
	504	}
[9243cc91]	505	}
	506
[db4d8e3]	507	std::list<DeclarationWithType> MutexKeyword::findMutexArgs( FunctionDecl decl, bool & first ) {
[64adb03]	508	std::list<DeclarationWithType*> mutexArgs;
	509
[db4d8e3]	510	bool once = true;
[64adb03]	511	for( auto arg : decl->get_functionType()->get_parameters()) {
	512	//Find mutex arguments
	513	Type* ty = arg->get_type();
[615a096]	514	if( ! ty->get_mutex() ) continue;
[64adb03]	515
[db4d8e3]	516	if(once) {first = true;}
	517	once = false;
	518
[64adb03]	519	//Append it to the list
	520	mutexArgs.push_back( arg );
	521	}
	522
	523	return mutexArgs;
	524	}
	525
	526	void MutexKeyword::validate( DeclarationWithType * arg ) {
	527	Type* ty = arg->get_type();
	528
	529	//Makes sure it's not a copy
[870d1f0]	530	ReferenceType* rty = dynamic_cast< ReferenceType * >( ty );
[a16764a6]	531	if( ! rty ) SemanticError( arg, "Mutex argument must be of reference type " );
[64adb03]	532
	533	//Make sure the we are pointing directly to a type
[83a071f9]	534	Type* base = rty->get_base();
[a16764a6]	535	if( dynamic_cast< ReferenceType * >( base ) ) SemanticError( arg, "Mutex argument have exactly one level of indirection " );
	536	if( dynamic_cast< PointerType * >( base ) ) SemanticError( arg, "Mutex argument have exactly one level of indirection " );
[64adb03]	537
	538	//Make sure that typed isn't mutex
[a16764a6]	539	if( base->get_mutex() ) SemanticError( arg, "mutex keyword may only appear once per argument " );
[64adb03]	540	}
	541
[549c006]	542	void MutexKeyword::addDtorStatments( FunctionDecl* func, CompoundStmt * body, const std::list<DeclarationWithType * > & args ) {
	543	Type * arg_type = args.front()->get_type()->clone();
	544	arg_type->set_mutex( false );
	545
	546	ObjectDecl * monitors = new ObjectDecl(
	547	"__monitor",
[ba3706f]	548	noStorageClasses,
[549c006]	549	LinkageSpec::Cforall,
	550	nullptr,
	551	new PointerType(
	552	noQualifiers,
	553	new StructInstType(
	554	noQualifiers,
	555	monitor_decl
	556	)
	557	),
	558	new SingleInit( new UntypedExpr(
	559	new NameExpr( "get_monitor" ),
	560	{ new CastExpr( new VariableExpr( args.front() ), arg_type ) }
	561	))
	562	);
	563
	564	assert(generic_func);
	565
	566	//in reverse order :
	567	// monitor_guard_t __guard = { __monitors, #, func };
	568	body->push_front(
[ba3706f]	569	new DeclStmt( new ObjectDecl(
[549c006]	570	"__guard",
[ba3706f]	571	noStorageClasses,
[549c006]	572	LinkageSpec::Cforall,
	573	nullptr,
	574	new StructInstType(
	575	noQualifiers,
	576	dtor_guard_decl
	577	),
	578	new ListInit(
	579	{
	580	new SingleInit( new AddressExpr( new VariableExpr( monitors ) ) ),
	581	new SingleInit( new CastExpr( new VariableExpr( func ), generic_func->clone() ) )
	582	},
	583	noDesignators,
	584	true
	585	)
	586	))
	587	);
	588
	589	//monitor_desc * __monitors[] = { get_monitor(a), get_monitor(b) };
[ba3706f]	590	body->push_front( new DeclStmt( monitors) );
[549c006]	591	}
	592
[97e3296]	593	void MutexKeyword::addStatments( FunctionDecl* func, CompoundStmt * body, const std::list<DeclarationWithType * > & args ) {
[9243cc91]	594	ObjectDecl * monitors = new ObjectDecl(
	595	"__monitors",
[ba3706f]	596	noStorageClasses,
[9243cc91]	597	LinkageSpec::Cforall,
	598	nullptr,
	599	new ArrayType(
	600	noQualifiers,
	601	new PointerType(
	602	noQualifiers,
	603	new StructInstType(
	604	noQualifiers,
	605	monitor_decl
	606	)
	607	),
	608	new ConstantExpr( Constant::from_ulong( args.size() ) ),
	609	false,
	610	false
	611	),
	612	new ListInit(
[bd41764]	613	map_range < std::list<Initializer> > ( args, [](DeclarationWithType var ){
[cb0e6de]	614	Type * type = var->get_type()->clone();
	615	type->set_mutex( false );
[9243cc91]	616	return new SingleInit( new UntypedExpr(
	617	new NameExpr( "get_monitor" ),
[cb0e6de]	618	{ new CastExpr( new VariableExpr( var ), type ) }
[9243cc91]	619	) );
	620	})
	621	)
	622	);
	623
[97e3296]	624	assert(generic_func);
	625
[64adb03]	626	//in reverse order :
[97e3296]	627	// monitor_guard_t __guard = { __monitors, #, func };
[64adb03]	628	body->push_front(
[ba3706f]	629	new DeclStmt( new ObjectDecl(
[64adb03]	630	"__guard",
[ba3706f]	631	noStorageClasses,
[64adb03]	632	LinkageSpec::Cforall,
	633	nullptr,
	634	new StructInstType(
	635	noQualifiers,
[ef42b143]	636	guard_decl
[64adb03]	637	),
	638	new ListInit(
	639	{
[9243cc91]	640	new SingleInit( new VariableExpr( monitors ) ),
[97e3296]	641	new SingleInit( new ConstantExpr( Constant::from_ulong( args.size() ) ) ),
	642	new SingleInit( new CastExpr( new VariableExpr( func ), generic_func->clone() ) )
[ef42b143]	643	},
	644	noDesignators,
	645	true
[64adb03]	646	)
	647	))
	648	);
	649
[ef42b143]	650	//monitor_desc * __monitors[] = { get_monitor(a), get_monitor(b) };
[ba3706f]	651	body->push_front( new DeclStmt( monitors) );
[64adb03]	652	}
[bd4d011]	653
	654	//=============================================================================================
	655	// General entry routine
	656	//=============================================================================================
[549c006]	657	void ThreadStarter::previsit( StructDecl * decl ) {
	658	if( decl->name == "thread_desc" && decl->body ) {
	659	assert( !thread_decl );
	660	thread_decl = decl;
	661	}
	662	}
	663
[2065609]	664	void ThreadStarter::postvisit(FunctionDecl * decl) {
[9f5ecf5]	665	if( ! CodeGen::isConstructor(decl->name) ) return;
[bd4d011]	666
[549c006]	667	Type * typeof_this = InitTweak::getTypeofThis(decl->type);
	668	StructInstType * ctored_type = dynamic_cast< StructInstType * >( typeof_this );
	669	if( ctored_type && ctored_type->baseStruct == thread_decl ) {
	670	thread_ctor_seen = true;
	671	}
	672
[bd4d011]	673	DeclarationWithType * param = decl->get_functionType()->get_parameters().front();
[ce8c12f]	674	auto type = dynamic_cast< StructInstType * >( InitTweak::getPointerBase( param->get_type() ) );
[bd4d011]	675	if( type && type->get_baseStruct()->is_thread() ) {
[549c006]	676	if( !thread_decl \|\| !thread_ctor_seen ) {
[a16764a6]	677	SemanticError( type->get_baseStruct()->location, "thread keyword requires threads to be in scope, add #include <thread>");
[549c006]	678	}
	679
[bd4d011]	680	addStartStatement( decl, param );
	681	}
	682	}
	683
	684	void ThreadStarter::addStartStatement( FunctionDecl * decl, DeclarationWithType * param ) {
	685	CompoundStmt * stmt = decl->get_statements();
	686
	687	if( ! stmt ) return;
	688
[bf2438c]	689	stmt->push_back(
[bd4d011]	690	new ExprStmt(
	691	new UntypedExpr(
	692	new NameExpr( "__thrd_start" ),
	693	{ new VariableExpr( param ) }
	694	)
	695	)
	696	);
	697	}
[68fe077a]	698	};
[6b0b624]	699
	700	// Local Variables: //
	701	// mode: c //
	702	// tab-width: 4 //
	703	// End: //

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