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source: src/Concurrency/Keywords.cc@ f47f887

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Last change on this file since f47f887 was 2bf7ef6, checked in by Thierry Delisle <tdelisle@…>, 7 years ago
Small changes to comments in Keywords.cc
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File size: 22.1 KB

Rev	Line
[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
[2065609]	21	#include "Common/PassVisitor.h" // for PassVisitor
[bf2438c]	22	#include "Common/SemanticError.h" // for SemanticError
	23	#include "Common/utility.h" // for deleteAll, map_range
[bff227f]	24	#include "CodeGen/OperatorTable.h" // for isConstructor
	25	#include "InitTweak/InitTweak.h" // for getPointerBase
[bf2438c]	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
	36	class Attribute;
[64adb03]	37
	38	namespace Concurrency {
	39	//=============================================================================================
[2065609]	40	// Pass declarations
[64adb03]	41	//=============================================================================================
	42
[bcda04c]	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	//
[2065609]	52	class ConcurrentSueKeyword : public WithDeclsToAdd {
[bcda04c]	53	public:
	54
[9a705dc8]	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 ) {}
[bcda04c]	57
	58	virtual ~ConcurrentSueKeyword() {}
	59
[9a705dc8]	60	Declaration * postmutate( StructDecl * decl );
[bcda04c]	61
	62	void handle( StructDecl * );
	63	FunctionDecl * forwardDeclare( StructDecl * );
	64	ObjectDecl * addField( StructDecl * );
[2f9a722]	65	void addRoutines( ObjectDecl , FunctionDecl );
[bcda04c]	66
	67	virtual bool is_target( StructDecl * decl ) = 0;
	68
[9a705dc8]	69	Expression * postmutate( KeywordCastExpr * cast );
	70
[bcda04c]	71	private:
	72	const std::string type_name;
	73	const std::string field_name;
	74	const std::string getter_name;
	75	const std::string context_error;
[bd4d011]	76	bool needs_main;
[9a705dc8]	77	KeywordCastExpr::Target cast_target;
[bcda04c]	78
	79	StructDecl* type_decl = nullptr;
	80	};
	81
	82
[64adb03]	83	//-----------------------------------------------------------------------------
	84	//Handles thread type declarations :
	85	// thread Mythread { struct MyThread {
	86	// int data; int data;
	87	// a_struct_t more_data; a_struct_t more_data;
	88	// => thread_desc __thrd_d;
	89	// }; };
	90	// static inline thread_desc * get_thread( MyThread * this ) { return &this->__thrd_d; }
	91	//
[bcda04c]	92	class ThreadKeyword final : public ConcurrentSueKeyword {
[64adb03]	93	public:
	94
[bcda04c]	95	ThreadKeyword() : ConcurrentSueKeyword(
	96	"thread_desc",
	97	"__thrd",
	98	"get_thread",
[73abe95]	99	"thread keyword requires threads to be in scope, add #include <thread.hfa>",
[9a705dc8]	100	true,
	101	KeywordCastExpr::Thread
[bcda04c]	102	)
	103	{}
	104
	105	virtual ~ThreadKeyword() {}
	106
	107	virtual bool is_target( StructDecl * decl ) override final { return decl->is_thread(); }
	108
	109	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	110	PassVisitor< ThreadKeyword > impl;
[9a705dc8]	111	mutateAll( translationUnit, impl );
[bcda04c]	112	}
[64adb03]	113	};
	114
	115	//-----------------------------------------------------------------------------
	116	//Handles coroutine type declarations :
	117	// coroutine MyCoroutine { struct MyCoroutine {
	118	// int data; int data;
	119	// a_struct_t more_data; a_struct_t more_data;
	120	// => coroutine_desc __cor_d;
	121	// }; };
	122	// static inline coroutine_desc * get_coroutine( MyCoroutine * this ) { return &this->__cor_d; }
	123	//
[bcda04c]	124	class CoroutineKeyword final : public ConcurrentSueKeyword {
[64adb03]	125	public:
	126
[bcda04c]	127	CoroutineKeyword() : ConcurrentSueKeyword(
	128	"coroutine_desc",
	129	"__cor",
	130	"get_coroutine",
[73abe95]	131	"coroutine keyword requires coroutines to be in scope, add #include <coroutine.hfa>",
[9a705dc8]	132	true,
	133	KeywordCastExpr::Coroutine
[bcda04c]	134	)
	135	{}
[b32ada31]	136
[bcda04c]	137	virtual ~CoroutineKeyword() {}
	138
	139	virtual bool is_target( StructDecl * decl ) override final { return decl->is_coroutine(); }
[b32ada31]	140
	141	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	142	PassVisitor< CoroutineKeyword > impl;
[9a705dc8]	143	mutateAll( translationUnit, impl );
[b32ada31]	144	}
[64adb03]	145	};
	146
	147	//-----------------------------------------------------------------------------
	148	//Handles monitor type declarations :
	149	// monitor MyMonitor { struct MyMonitor {
	150	// int data; int data;
	151	// a_struct_t more_data; a_struct_t more_data;
	152	// => monitor_desc __mon_d;
	153	// }; };
	154	// static inline monitor_desc * get_coroutine( MyMonitor * this ) { return &this->__cor_d; }
	155	//
[bcda04c]	156	class MonitorKeyword final : public ConcurrentSueKeyword {
[64adb03]	157	public:
	158
[bcda04c]	159	MonitorKeyword() : ConcurrentSueKeyword(
	160	"monitor_desc",
	161	"__mon",
	162	"get_monitor",
[73abe95]	163	"monitor keyword requires monitors to be in scope, add #include <monitor.hfa>",
[9a705dc8]	164	false,
	165	KeywordCastExpr::Monitor
[bcda04c]	166	)
	167	{}
	168
	169	virtual ~MonitorKeyword() {}
	170
	171	virtual bool is_target( StructDecl * decl ) override final { return decl->is_monitor(); }
	172
	173	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	174	PassVisitor< MonitorKeyword > impl;
[9a705dc8]	175	mutateAll( translationUnit, impl );
[bcda04c]	176	}
[64adb03]	177	};
	178
	179	//-----------------------------------------------------------------------------
	180	//Handles mutex routines definitions :
	181	// void foo( A * mutex a, B * mutex b, int i ) { void foo( A * a, B * b, int i ) {
[9243cc91]	182	// monitor_desc * __monitors[] = { get_monitor(a), get_monitor(b) };
[64adb03]	183	// monitor_guard_t __guard = { __monitors, 2 };
	184	// /Some code/ => /Some code/
	185	// } }
	186	//
[2065609]	187	class MutexKeyword final {
[64adb03]	188	public:
	189
[2065609]	190	void postvisit( FunctionDecl * decl );
	191	void postvisit( StructDecl * decl );
[64adb03]	192
[db4d8e3]	193	std::list<DeclarationWithType> findMutexArgs( FunctionDecl, bool & first );
[64adb03]	194	void validate( DeclarationWithType * );
[549c006]	195	void addDtorStatments( FunctionDecl* func, CompoundStmt , const std::list<DeclarationWithType > &);
[97e3296]	196	void addStatments( FunctionDecl* func, CompoundStmt , const std::list<DeclarationWithType > &);
[64adb03]	197
	198	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	199	PassVisitor< MutexKeyword > impl;
[64adb03]	200	acceptAll( translationUnit, impl );
	201	}
[9243cc91]	202
	203	private:
	204	StructDecl* monitor_decl = nullptr;
[ef42b143]	205	StructDecl* guard_decl = nullptr;
[549c006]	206	StructDecl* dtor_guard_decl = nullptr;
[97e3296]	207
	208	static std::unique_ptr< Type > generic_func;
[64adb03]	209	};
	210
[97e3296]	211	std::unique_ptr< Type > MutexKeyword::generic_func = std::unique_ptr< Type >(
	212	new FunctionType(
	213	noQualifiers,
	214	true
	215	)
	216	);
	217
[bd4d011]	218	//-----------------------------------------------------------------------------
	219	//Handles mutex routines definitions :
	220	// void foo( A * mutex a, B * mutex b, int i ) { void foo( A * a, B * b, int i ) {
	221	// monitor_desc * __monitors[] = { get_monitor(a), get_monitor(b) };
	222	// monitor_guard_t __guard = { __monitors, 2 };
	223	// /Some code/ => /Some code/
	224	// } }
	225	//
[2065609]	226	class ThreadStarter final {
[bd4d011]	227	public:
	228
[2065609]	229	void postvisit( FunctionDecl * decl );
[549c006]	230	void previsit ( StructDecl * decl );
[bd4d011]	231
	232	void addStartStatement( FunctionDecl * decl, DeclarationWithType * param );
	233
	234	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	235	PassVisitor< ThreadStarter > impl;
[bd4d011]	236	acceptAll( translationUnit, impl );
	237	}
[549c006]	238
	239	private :
	240	bool thread_ctor_seen = false;
	241	StructDecl * thread_decl = nullptr;
[bd4d011]	242	};
	243
[64adb03]	244	//=============================================================================================
	245	// General entry routine
	246	//=============================================================================================
	247	void applyKeywords( std::list< Declaration * > & translationUnit ) {
	248	ThreadKeyword ::implement( translationUnit );
	249	CoroutineKeyword ::implement( translationUnit );
	250	MonitorKeyword ::implement( translationUnit );
[bcda04c]	251	}
	252
	253	void implementMutexFuncs( std::list< Declaration * > & translationUnit ) {
[64adb03]	254	MutexKeyword ::implement( translationUnit );
	255	}
	256
[bcda04c]	257	void implementThreadStarter( std::list< Declaration * > & translationUnit ) {
[bd4d011]	258	ThreadStarter ::implement( translationUnit );
[bcda04c]	259	}
	260
[b32ada31]	261	//=============================================================================================
[bcda04c]	262	// Generic keyword implementation
[b32ada31]	263	//=============================================================================================
[2db79e5]	264	void fixupGenerics(FunctionType * func, StructDecl * decl) {
	265	cloneAll(decl->parameters, func->forall);
	266	for ( TypeDecl * td : func->forall ) {
	267	strict_dynamic_cast<StructInstType*>(
	268	func->parameters.front()->get_type()->stripReferences()
	269	)->parameters.push_back(
	270	new TypeExpr( new TypeInstType( noQualifiers, td->name, td ) )
	271	);
	272	}
	273	}
	274
[9a705dc8]	275	Declaration * ConcurrentSueKeyword::postmutate(StructDecl * decl) {
[9f5ecf5]	276	if( decl->name == type_name && decl->body ) {
[bcda04c]	277	assert( !type_decl );
	278	type_decl = decl;
[b32ada31]	279	}
[bcda04c]	280	else if ( is_target(decl) ) {
[b32ada31]	281	handle( decl );
	282	}
[9a705dc8]	283	return decl;
[b32ada31]	284	}
	285
[9a705dc8]	286	Expression * ConcurrentSueKeyword::postmutate( KeywordCastExpr * cast ) {
	287	if ( cast_target == cast->target ) {
	288	// convert (thread &)t to (thread_desc &)*get_thread(t), etc.
	289	if( !type_decl ) SemanticError( cast, context_error );
	290	Expression * arg = cast->arg;
	291	cast->arg = nullptr;
	292	delete cast;
	293	return new CastExpr(
	294	UntypedExpr::createDeref(
	295	new UntypedExpr( new NameExpr( getter_name ), { arg } )
	296	),
	297	new ReferenceType(
	298	noQualifiers,
	299	new StructInstType( noQualifiers, type_decl ) )
	300	);
	301	}
	302	return cast;
	303	}
	304
	305
[bcda04c]	306	void ConcurrentSueKeyword::handle( StructDecl * decl ) {
[9f5ecf5]	307	if( ! decl->body ) return;
[b32ada31]	308
[a16764a6]	309	if( !type_decl ) SemanticError( decl, context_error );
[b32ada31]	310
[bcda04c]	311	FunctionDecl * func = forwardDeclare( decl );
	312	ObjectDecl * field = addField( decl );
[2f9a722]	313	addRoutines( field, func );
[b32ada31]	314	}
	315
[bcda04c]	316	FunctionDecl * ConcurrentSueKeyword::forwardDeclare( StructDecl * decl ) {
	317
	318	StructDecl * forward = decl->clone();
	319	forward->set_body( false );
	320	deleteAll( forward->get_members() );
	321	forward->get_members().clear();
	322
[bd4d011]	323	FunctionType * get_type = new FunctionType( noQualifiers, false );
[bcda04c]	324	ObjectDecl * this_decl = new ObjectDecl(
	325	"this",
[ba3706f]	326	noStorageClasses,
[b32ada31]	327	LinkageSpec::Cforall,
	328	nullptr,
[83a071f9]	329	new ReferenceType(
[b32ada31]	330	noQualifiers,
[bcda04c]	331	new StructInstType(
	332	noQualifiers,
	333	decl
	334	)
[b32ada31]	335	),
	336	nullptr
	337	);
	338
[2db79e5]	339	get_type->get_parameters().push_back( this_decl->clone() );
[bd4d011]	340	get_type->get_returnVals().push_back(
[e04b636]	341	new ObjectDecl(
	342	"ret",
[ba3706f]	343	noStorageClasses,
[e04b636]	344	LinkageSpec::Cforall,
	345	nullptr,
	346	new PointerType(
	347	noQualifiers,
	348	new StructInstType(
	349	noQualifiers,
[bcda04c]	350	type_decl
[e04b636]	351	)
	352	),
	353	nullptr
	354	)
	355	);
[2db79e5]	356	fixupGenerics(get_type, decl);
[b32ada31]	357
[bcda04c]	358	FunctionDecl * get_decl = new FunctionDecl(
	359	getter_name,
	360	Type::Static,
	361	LinkageSpec::Cforall,
[bd4d011]	362	get_type,
[bcda04c]	363	nullptr,
	364	noAttributes,
	365	Type::Inline
	366	);
	367
[bd4d011]	368	FunctionDecl * main_decl = nullptr;
	369
	370	if( needs_main ) {
	371	FunctionType * main_type = new FunctionType( noQualifiers, false );
[bf2438c]	372
[bd4d011]	373	main_type->get_parameters().push_back( this_decl->clone() );
	374
	375	main_decl = new FunctionDecl(
	376	"main",
[ba3706f]	377	noStorageClasses,
[bd4d011]	378	LinkageSpec::Cforall,
	379	main_type,
	380	nullptr
	381	);
[2db79e5]	382	fixupGenerics(main_type, decl);
[bd4d011]	383	}
	384
[2db79e5]	385	delete this_decl;
	386
[2065609]	387	declsToAddBefore.push_back( forward );
	388	if( needs_main ) declsToAddBefore.push_back( main_decl );
	389	declsToAddBefore.push_back( get_decl );
[bcda04c]	390
	391	return get_decl;
	392	}
	393
	394	ObjectDecl * ConcurrentSueKeyword::addField( StructDecl * decl ) {
	395	ObjectDecl * field = new ObjectDecl(
	396	field_name,
[ba3706f]	397	noStorageClasses,
[bcda04c]	398	LinkageSpec::Cforall,
	399	nullptr,
	400	new StructInstType(
	401	noQualifiers,
	402	type_decl
	403	),
	404	nullptr
	405	);
	406
	407	decl->get_members().push_back( field );
	408
	409	return field;
	410	}
	411
[2f9a722]	412	void ConcurrentSueKeyword::addRoutines( ObjectDecl * field, FunctionDecl * func ) {
[ba3706f]	413	CompoundStmt * statement = new CompoundStmt();
[bf2438c]	414	statement->push_back(
[b32ada31]	415	new ReturnStmt(
[e04b636]	416	new AddressExpr(
[bcda04c]	417	new MemberExpr(
	418	field,
[2db79e5]	419	new CastExpr(
	420	new VariableExpr( func->get_functionType()->get_parameters().front() ),
	421	func->get_functionType()->get_parameters().front()->get_type()->stripReferences()->clone()
	422	)
[e04b636]	423	)
[b32ada31]	424	)
	425	)
	426	);
	427
[bcda04c]	428	FunctionDecl * get_decl = func->clone();
	429
	430	get_decl->set_statements( statement );
[e04b636]	431
	432	declsToAddAfter.push_back( get_decl );
	433
[bcda04c]	434	// get_decl->fixUniqueId();
[b32ada31]	435	}
	436
[64adb03]	437	//=============================================================================================
	438	// Mutex keyword implementation
	439	//=============================================================================================
[97e3296]	440
[2065609]	441	void MutexKeyword::postvisit(FunctionDecl* decl) {
[102a58b]	442
[db4d8e3]	443	bool first = false;
	444	std::list<DeclarationWithType*> mutexArgs = findMutexArgs( decl, first );
[ceedde6]	445	bool isDtor = CodeGen::isDestructor( decl->name );
[64adb03]	446
[ceedde6]	447	// Is this function relevant to monitors
	448	if( mutexArgs.empty() ) {
	449	// If this is the destructor for a monitor it must be mutex
	450	if(isDtor) {
	451	Type* ty = decl->get_functionType()->get_parameters().front()->get_type();
	452
	453	// If it's a copy, it's not a mutex
	454	ReferenceType* rty = dynamic_cast< ReferenceType * >( ty );
	455	if( ! rty ) return;
	456
	457	// If we are not pointing directly to a type, it's not a mutex
	458	Type* base = rty->get_base();
	459	if( dynamic_cast< ReferenceType * >( base ) ) return;
	460	if( dynamic_cast< PointerType * >( base ) ) return;
	461
	462	// Check if its a struct
	463	StructInstType * baseStruct = dynamic_cast< StructInstType * >( base );
	464	if( !baseStruct ) return;
	465
	466	// Check if its a monitor
	467	if(baseStruct->baseStruct->is_monitor() \|\| baseStruct->baseStruct->is_thread())
	468	SemanticError( decl, "destructors for structures declared as \"monitor\" must use mutex parameters\n" );
	469	}
	470	return;
	471	}
[549c006]	472
[ceedde6]	473	// Monitors can't be constructed with mutual exclusion
	474	if( CodeGen::isConstructor(decl->name) && !first ) SemanticError( decl, "constructors cannot have mutex parameters" );
[549c006]	475
[ceedde6]	476	// It makes no sense to have multiple mutex parameters for the destructor
[a16764a6]	477	if( isDtor && mutexArgs.size() != 1 ) SemanticError( decl, "destructors can only have 1 mutex argument" );
[549c006]	478
[ceedde6]	479	// Make sure all the mutex arguments are monitors
[64adb03]	480	for(auto arg : mutexArgs) {
	481	validate( arg );
	482	}
	483
[ceedde6]	484	// Check if we need to instrument the body
[64adb03]	485	CompoundStmt* body = decl->get_statements();
	486	if( ! body ) return;
	487
[ceedde6]	488	// Do we have the required headers
[a16764a6]	489	if( !monitor_decl \|\| !guard_decl \|\| !dtor_guard_decl )
[73abe95]	490	SemanticError( decl, "mutex keyword requires monitors to be in scope, add #include <monitor.hfa>\n" );
[b32ada31]	491
[ceedde6]	492	// Instrument the body
[549c006]	493	if( isDtor ) {
	494	addDtorStatments( decl, body, mutexArgs );
	495	}
	496	else {
	497	addStatments( decl, body, mutexArgs );
	498	}
[64adb03]	499	}
	500
[2065609]	501	void MutexKeyword::postvisit(StructDecl* decl) {
[102a58b]	502
[88d955f]	503	if( decl->name == "monitor_desc" && decl->body ) {
[9243cc91]	504	assert( !monitor_decl );
	505	monitor_decl = decl;
	506	}
[88d955f]	507	else if( decl->name == "monitor_guard_t" && decl->body ) {
[ef42b143]	508	assert( !guard_decl );
	509	guard_decl = decl;
	510	}
[88d955f]	511	else if( decl->name == "monitor_dtor_guard_t" && decl->body ) {
[549c006]	512	assert( !dtor_guard_decl );
	513	dtor_guard_decl = decl;
	514	}
[9243cc91]	515	}
	516
[db4d8e3]	517	std::list<DeclarationWithType> MutexKeyword::findMutexArgs( FunctionDecl decl, bool & first ) {
[64adb03]	518	std::list<DeclarationWithType*> mutexArgs;
	519
[db4d8e3]	520	bool once = true;
[64adb03]	521	for( auto arg : decl->get_functionType()->get_parameters()) {
	522	//Find mutex arguments
	523	Type* ty = arg->get_type();
[615a096]	524	if( ! ty->get_mutex() ) continue;
[64adb03]	525
[db4d8e3]	526	if(once) {first = true;}
	527	once = false;
	528
[64adb03]	529	//Append it to the list
	530	mutexArgs.push_back( arg );
	531	}
	532
	533	return mutexArgs;
	534	}
	535
	536	void MutexKeyword::validate( DeclarationWithType * arg ) {
	537	Type* ty = arg->get_type();
	538
	539	//Makes sure it's not a copy
[870d1f0]	540	ReferenceType* rty = dynamic_cast< ReferenceType * >( ty );
[a16764a6]	541	if( ! rty ) SemanticError( arg, "Mutex argument must be of reference type " );
[64adb03]	542
	543	//Make sure the we are pointing directly to a type
[83a071f9]	544	Type* base = rty->get_base();
[a16764a6]	545	if( dynamic_cast< ReferenceType * >( base ) ) SemanticError( arg, "Mutex argument have exactly one level of indirection " );
	546	if( dynamic_cast< PointerType * >( base ) ) SemanticError( arg, "Mutex argument have exactly one level of indirection " );
[64adb03]	547
	548	//Make sure that typed isn't mutex
[a16764a6]	549	if( base->get_mutex() ) SemanticError( arg, "mutex keyword may only appear once per argument " );
[64adb03]	550	}
	551
[549c006]	552	void MutexKeyword::addDtorStatments( FunctionDecl* func, CompoundStmt * body, const std::list<DeclarationWithType * > & args ) {
	553	Type * arg_type = args.front()->get_type()->clone();
	554	arg_type->set_mutex( false );
	555
	556	ObjectDecl * monitors = new ObjectDecl(
	557	"__monitor",
[ba3706f]	558	noStorageClasses,
[549c006]	559	LinkageSpec::Cforall,
	560	nullptr,
	561	new PointerType(
	562	noQualifiers,
	563	new StructInstType(
	564	noQualifiers,
	565	monitor_decl
	566	)
	567	),
	568	new SingleInit( new UntypedExpr(
	569	new NameExpr( "get_monitor" ),
	570	{ new CastExpr( new VariableExpr( args.front() ), arg_type ) }
	571	))
	572	);
	573
	574	assert(generic_func);
	575
	576	//in reverse order :
[2bf7ef6]	577	// monitor_dtor_guard_t __guard = { __monitors, func };
[549c006]	578	body->push_front(
[ba3706f]	579	new DeclStmt( new ObjectDecl(
[549c006]	580	"__guard",
[ba3706f]	581	noStorageClasses,
[549c006]	582	LinkageSpec::Cforall,
	583	nullptr,
	584	new StructInstType(
	585	noQualifiers,
	586	dtor_guard_decl
	587	),
	588	new ListInit(
	589	{
	590	new SingleInit( new AddressExpr( new VariableExpr( monitors ) ) ),
	591	new SingleInit( new CastExpr( new VariableExpr( func ), generic_func->clone() ) )
	592	},
	593	noDesignators,
	594	true
	595	)
	596	))
	597	);
	598
	599	//monitor_desc * __monitors[] = { get_monitor(a), get_monitor(b) };
[ba3706f]	600	body->push_front( new DeclStmt( monitors) );
[549c006]	601	}
	602
[97e3296]	603	void MutexKeyword::addStatments( FunctionDecl* func, CompoundStmt * body, const std::list<DeclarationWithType * > & args ) {
[9243cc91]	604	ObjectDecl * monitors = new ObjectDecl(
	605	"__monitors",
[ba3706f]	606	noStorageClasses,
[9243cc91]	607	LinkageSpec::Cforall,
	608	nullptr,
	609	new ArrayType(
	610	noQualifiers,
	611	new PointerType(
	612	noQualifiers,
	613	new StructInstType(
	614	noQualifiers,
	615	monitor_decl
	616	)
	617	),
	618	new ConstantExpr( Constant::from_ulong( args.size() ) ),
	619	false,
	620	false
	621	),
	622	new ListInit(
[bd41764]	623	map_range < std::list<Initializer> > ( args, [](DeclarationWithType var ){
[cb0e6de]	624	Type * type = var->get_type()->clone();
	625	type->set_mutex( false );
[9243cc91]	626	return new SingleInit( new UntypedExpr(
	627	new NameExpr( "get_monitor" ),
[cb0e6de]	628	{ new CastExpr( new VariableExpr( var ), type ) }
[9243cc91]	629	) );
	630	})
	631	)
	632	);
	633
[97e3296]	634	assert(generic_func);
	635
[2bf7ef6]	636	// in reverse order :
[97e3296]	637	// monitor_guard_t __guard = { __monitors, #, func };
[64adb03]	638	body->push_front(
[ba3706f]	639	new DeclStmt( new ObjectDecl(
[64adb03]	640	"__guard",
[ba3706f]	641	noStorageClasses,
[64adb03]	642	LinkageSpec::Cforall,
	643	nullptr,
	644	new StructInstType(
	645	noQualifiers,
[ef42b143]	646	guard_decl
[64adb03]	647	),
	648	new ListInit(
	649	{
[9243cc91]	650	new SingleInit( new VariableExpr( monitors ) ),
[97e3296]	651	new SingleInit( new ConstantExpr( Constant::from_ulong( args.size() ) ) ),
	652	new SingleInit( new CastExpr( new VariableExpr( func ), generic_func->clone() ) )
[ef42b143]	653	},
	654	noDesignators,
	655	true
[64adb03]	656	)
	657	))
	658	);
	659
[ef42b143]	660	//monitor_desc * __monitors[] = { get_monitor(a), get_monitor(b) };
[ba3706f]	661	body->push_front( new DeclStmt( monitors) );
[64adb03]	662	}
[bd4d011]	663
	664	//=============================================================================================
	665	// General entry routine
	666	//=============================================================================================
[549c006]	667	void ThreadStarter::previsit( StructDecl * decl ) {
	668	if( decl->name == "thread_desc" && decl->body ) {
	669	assert( !thread_decl );
	670	thread_decl = decl;
	671	}
	672	}
	673
[2065609]	674	void ThreadStarter::postvisit(FunctionDecl * decl) {
[9f5ecf5]	675	if( ! CodeGen::isConstructor(decl->name) ) return;
[bd4d011]	676
[549c006]	677	Type * typeof_this = InitTweak::getTypeofThis(decl->type);
	678	StructInstType * ctored_type = dynamic_cast< StructInstType * >( typeof_this );
	679	if( ctored_type && ctored_type->baseStruct == thread_decl ) {
	680	thread_ctor_seen = true;
	681	}
	682
[bd4d011]	683	DeclarationWithType * param = decl->get_functionType()->get_parameters().front();
[ce8c12f]	684	auto type = dynamic_cast< StructInstType * >( InitTweak::getPointerBase( param->get_type() ) );
[bd4d011]	685	if( type && type->get_baseStruct()->is_thread() ) {
[549c006]	686	if( !thread_decl \|\| !thread_ctor_seen ) {
[73abe95]	687	SemanticError( type->get_baseStruct()->location, "thread keyword requires threads to be in scope, add #include <thread.hfa>");
[549c006]	688	}
	689
[bd4d011]	690	addStartStatement( decl, param );
	691	}
	692	}
	693
	694	void ThreadStarter::addStartStatement( FunctionDecl * decl, DeclarationWithType * param ) {
	695	CompoundStmt * stmt = decl->get_statements();
	696
	697	if( ! stmt ) return;
	698
[bf2438c]	699	stmt->push_back(
[bd4d011]	700	new ExprStmt(
	701	new UntypedExpr(
	702	new NameExpr( "__thrd_start" ),
	703	{ new VariableExpr( param ) }
	704	)
	705	)
	706	);
	707	}
[68fe077a]	708	};
[6b0b624]	709
	710	// Local Variables: //
	711	// mode: c //
	712	// tab-width: 4 //
	713	// End: //

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