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source: src/Concurrency/Keywords.cc@ e8c52cf

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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 e8c52cf 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

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 );
[6c3a5ac1]	61	DeclarationWithType * postmutate( FunctionDecl * 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
[6c3a5ac1]	80	StructDecl * type_decl = nullptr;
	81	FunctionDecl * dtor_decl = nullptr;
[bcda04c]	82	};
	83
	84
[64adb03]	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	//
[bcda04c]	94	class ThreadKeyword final : public ConcurrentSueKeyword {
[64adb03]	95	public:
	96
[bcda04c]	97	ThreadKeyword() : ConcurrentSueKeyword(
	98	"thread_desc",
	99	"__thrd",
	100	"get_thread",
[6c3a5ac1]	101	"thread keyword requires threads to be in scope, add #include <thread.hfa>\n",
[9a705dc8]	102	true,
	103	KeywordCastExpr::Thread
[bcda04c]	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 ) {
[2065609]	112	PassVisitor< ThreadKeyword > impl;
[9a705dc8]	113	mutateAll( translationUnit, impl );
[bcda04c]	114	}
[64adb03]	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	//
[bcda04c]	126	class CoroutineKeyword final : public ConcurrentSueKeyword {
[64adb03]	127	public:
	128
[bcda04c]	129	CoroutineKeyword() : ConcurrentSueKeyword(
	130	"coroutine_desc",
	131	"__cor",
	132	"get_coroutine",
[6c3a5ac1]	133	"coroutine keyword requires coroutines to be in scope, add #include <coroutine.hfa>\n",
[9a705dc8]	134	true,
	135	KeywordCastExpr::Coroutine
[bcda04c]	136	)
	137	{}
[b32ada31]	138
[bcda04c]	139	virtual ~CoroutineKeyword() {}
	140
	141	virtual bool is_target( StructDecl * decl ) override final { return decl->is_coroutine(); }
[b32ada31]	142
	143	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	144	PassVisitor< CoroutineKeyword > impl;
[9a705dc8]	145	mutateAll( translationUnit, impl );
[b32ada31]	146	}
[64adb03]	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	//
[bcda04c]	158	class MonitorKeyword final : public ConcurrentSueKeyword {
[64adb03]	159	public:
	160
[bcda04c]	161	MonitorKeyword() : ConcurrentSueKeyword(
	162	"monitor_desc",
	163	"__mon",
	164	"get_monitor",
[6c3a5ac1]	165	"monitor keyword requires monitors to be in scope, add #include <monitor.hfa>\n",
[9a705dc8]	166	false,
	167	KeywordCastExpr::Monitor
[bcda04c]	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 ) {
[2065609]	176	PassVisitor< MonitorKeyword > impl;
[9a705dc8]	177	mutateAll( translationUnit, impl );
[bcda04c]	178	}
[64adb03]	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 ) {
[9243cc91]	184	// monitor_desc * __monitors[] = { get_monitor(a), get_monitor(b) };
[64adb03]	185	// monitor_guard_t __guard = { __monitors, 2 };
	186	// /Some code/ => /Some code/
	187	// } }
	188	//
[2065609]	189	class MutexKeyword final {
[64adb03]	190	public:
	191
[2065609]	192	void postvisit( FunctionDecl * decl );
	193	void postvisit( StructDecl * decl );
[64adb03]	194
[db4d8e3]	195	std::list<DeclarationWithType> findMutexArgs( FunctionDecl, bool & first );
[64adb03]	196	void validate( DeclarationWithType * );
[549c006]	197	void addDtorStatments( FunctionDecl* func, CompoundStmt , const std::list<DeclarationWithType > &);
[97e3296]	198	void addStatments( FunctionDecl* func, CompoundStmt , const std::list<DeclarationWithType > &);
[64adb03]	199
	200	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	201	PassVisitor< MutexKeyword > impl;
[64adb03]	202	acceptAll( translationUnit, impl );
	203	}
[9243cc91]	204
	205	private:
	206	StructDecl* monitor_decl = nullptr;
[ef42b143]	207	StructDecl* guard_decl = nullptr;
[549c006]	208	StructDecl* dtor_guard_decl = nullptr;
[97e3296]	209
	210	static std::unique_ptr< Type > generic_func;
[64adb03]	211	};
	212
[97e3296]	213	std::unique_ptr< Type > MutexKeyword::generic_func = std::unique_ptr< Type >(
	214	new FunctionType(
	215	noQualifiers,
	216	true
	217	)
	218	);
	219
[bd4d011]	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	//
[2065609]	228	class ThreadStarter final {
[bd4d011]	229	public:
	230
[2065609]	231	void postvisit( FunctionDecl * decl );
[549c006]	232	void previsit ( StructDecl * decl );
[bd4d011]	233
	234	void addStartStatement( FunctionDecl * decl, DeclarationWithType * param );
	235
	236	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	237	PassVisitor< ThreadStarter > impl;
[bd4d011]	238	acceptAll( translationUnit, impl );
	239	}
[549c006]	240
	241	private :
	242	bool thread_ctor_seen = false;
	243	StructDecl * thread_decl = nullptr;
[bd4d011]	244	};
	245
[64adb03]	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 );
[bcda04c]	253	}
	254
	255	void implementMutexFuncs( std::list< Declaration * > & translationUnit ) {
[64adb03]	256	MutexKeyword ::implement( translationUnit );
	257	}
	258
[bcda04c]	259	void implementThreadStarter( std::list< Declaration * > & translationUnit ) {
[bd4d011]	260	ThreadStarter ::implement( translationUnit );
[bcda04c]	261	}
	262
[b32ada31]	263	//=============================================================================================
[bcda04c]	264	// Generic keyword implementation
[b32ada31]	265	//=============================================================================================
[2db79e5]	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
[9a705dc8]	277	Declaration * ConcurrentSueKeyword::postmutate(StructDecl * decl) {
[9f5ecf5]	278	if( decl->name == type_name && decl->body ) {
[bcda04c]	279	assert( !type_decl );
	280	type_decl = decl;
[b32ada31]	281	}
[bcda04c]	282	else if ( is_target(decl) ) {
[b32ada31]	283	handle( decl );
	284	}
[9a705dc8]	285	return decl;
[b32ada31]	286	}
	287
[6c3a5ac1]	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
[9a705dc8]	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 );
[6c3a5ac1]	310	if( !dtor_decl ) SemanticError( cast, context_error );
[9a705dc8]	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
[bcda04c]	327	void ConcurrentSueKeyword::handle( StructDecl * decl ) {
[9f5ecf5]	328	if( ! decl->body ) return;
[b32ada31]	329
[a16764a6]	330	if( !type_decl ) SemanticError( decl, context_error );
[6c3a5ac1]	331	if( !dtor_decl ) SemanticError( decl, context_error );
[b32ada31]	332
[bcda04c]	333	FunctionDecl * func = forwardDeclare( decl );
	334	ObjectDecl * field = addField( decl );
[2f9a722]	335	addRoutines( field, func );
[b32ada31]	336	}
	337
[bcda04c]	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
[bd4d011]	345	FunctionType * get_type = new FunctionType( noQualifiers, false );
[bcda04c]	346	ObjectDecl * this_decl = new ObjectDecl(
	347	"this",
[ba3706f]	348	noStorageClasses,
[b32ada31]	349	LinkageSpec::Cforall,
	350	nullptr,
[83a071f9]	351	new ReferenceType(
[b32ada31]	352	noQualifiers,
[bcda04c]	353	new StructInstType(
	354	noQualifiers,
	355	decl
	356	)
[b32ada31]	357	),
	358	nullptr
	359	);
	360
[2db79e5]	361	get_type->get_parameters().push_back( this_decl->clone() );
[bd4d011]	362	get_type->get_returnVals().push_back(
[e04b636]	363	new ObjectDecl(
	364	"ret",
[ba3706f]	365	noStorageClasses,
[e04b636]	366	LinkageSpec::Cforall,
	367	nullptr,
	368	new PointerType(
	369	noQualifiers,
	370	new StructInstType(
	371	noQualifiers,
[bcda04c]	372	type_decl
[e04b636]	373	)
	374	),
	375	nullptr
	376	)
	377	);
[2db79e5]	378	fixupGenerics(get_type, decl);
[b32ada31]	379
[bcda04c]	380	FunctionDecl * get_decl = new FunctionDecl(
	381	getter_name,
	382	Type::Static,
	383	LinkageSpec::Cforall,
[bd4d011]	384	get_type,
[bcda04c]	385	nullptr,
	386	noAttributes,
	387	Type::Inline
	388	);
	389
[bd4d011]	390	FunctionDecl * main_decl = nullptr;
	391
	392	if( needs_main ) {
	393	FunctionType * main_type = new FunctionType( noQualifiers, false );
[bf2438c]	394
[bd4d011]	395	main_type->get_parameters().push_back( this_decl->clone() );
	396
	397	main_decl = new FunctionDecl(
	398	"main",
[ba3706f]	399	noStorageClasses,
[bd4d011]	400	LinkageSpec::Cforall,
	401	main_type,
	402	nullptr
	403	);
[2db79e5]	404	fixupGenerics(main_type, decl);
[bd4d011]	405	}
	406
[2db79e5]	407	delete this_decl;
	408
[2065609]	409	declsToAddBefore.push_back( forward );
	410	if( needs_main ) declsToAddBefore.push_back( main_decl );
	411	declsToAddBefore.push_back( get_decl );
[bcda04c]	412
	413	return get_decl;
	414	}
	415
	416	ObjectDecl * ConcurrentSueKeyword::addField( StructDecl * decl ) {
	417	ObjectDecl * field = new ObjectDecl(
	418	field_name,
[ba3706f]	419	noStorageClasses,
[bcda04c]	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
[2f9a722]	434	void ConcurrentSueKeyword::addRoutines( ObjectDecl * field, FunctionDecl * func ) {
[ba3706f]	435	CompoundStmt * statement = new CompoundStmt();
[bf2438c]	436	statement->push_back(
[b32ada31]	437	new ReturnStmt(
[e04b636]	438	new AddressExpr(
[bcda04c]	439	new MemberExpr(
	440	field,
[2db79e5]	441	new CastExpr(
	442	new VariableExpr( func->get_functionType()->get_parameters().front() ),
	443	func->get_functionType()->get_parameters().front()->get_type()->stripReferences()->clone()
	444	)
[e04b636]	445	)
[b32ada31]	446	)
	447	)
	448	);
	449
[bcda04c]	450	FunctionDecl * get_decl = func->clone();
	451
	452	get_decl->set_statements( statement );
[e04b636]	453
	454	declsToAddAfter.push_back( get_decl );
	455
[bcda04c]	456	// get_decl->fixUniqueId();
[b32ada31]	457	}
	458
[64adb03]	459	//=============================================================================================
	460	// Mutex keyword implementation
	461	//=============================================================================================
[97e3296]	462
[2065609]	463	void MutexKeyword::postvisit(FunctionDecl* decl) {
[102a58b]	464
[db4d8e3]	465	bool first = false;
	466	std::list<DeclarationWithType*> mutexArgs = findMutexArgs( decl, first );
[ceedde6]	467	bool isDtor = CodeGen::isDestructor( decl->name );
[64adb03]	468
[ceedde6]	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	}
[549c006]	494
[ceedde6]	495	// Monitors can't be constructed with mutual exclusion
	496	if( CodeGen::isConstructor(decl->name) && !first ) SemanticError( decl, "constructors cannot have mutex parameters" );
[549c006]	497
[ceedde6]	498	// It makes no sense to have multiple mutex parameters for the destructor
[a16764a6]	499	if( isDtor && mutexArgs.size() != 1 ) SemanticError( decl, "destructors can only have 1 mutex argument" );
[549c006]	500
[ceedde6]	501	// Make sure all the mutex arguments are monitors
[64adb03]	502	for(auto arg : mutexArgs) {
	503	validate( arg );
	504	}
	505
[ceedde6]	506	// Check if we need to instrument the body
[64adb03]	507	CompoundStmt* body = decl->get_statements();
	508	if( ! body ) return;
	509
[ceedde6]	510	// Do we have the required headers
[a16764a6]	511	if( !monitor_decl \|\| !guard_decl \|\| !dtor_guard_decl )
[73abe95]	512	SemanticError( decl, "mutex keyword requires monitors to be in scope, add #include <monitor.hfa>\n" );
[b32ada31]	513
[ceedde6]	514	// Instrument the body
[549c006]	515	if( isDtor ) {
	516	addDtorStatments( decl, body, mutexArgs );
	517	}
	518	else {
	519	addStatments( decl, body, mutexArgs );
	520	}
[64adb03]	521	}
	522
[2065609]	523	void MutexKeyword::postvisit(StructDecl* decl) {
[102a58b]	524
[88d955f]	525	if( decl->name == "monitor_desc" && decl->body ) {
[9243cc91]	526	assert( !monitor_decl );
	527	monitor_decl = decl;
	528	}
[88d955f]	529	else if( decl->name == "monitor_guard_t" && decl->body ) {
[ef42b143]	530	assert( !guard_decl );
	531	guard_decl = decl;
	532	}
[88d955f]	533	else if( decl->name == "monitor_dtor_guard_t" && decl->body ) {
[549c006]	534	assert( !dtor_guard_decl );
	535	dtor_guard_decl = decl;
	536	}
[9243cc91]	537	}
	538
[db4d8e3]	539	std::list<DeclarationWithType> MutexKeyword::findMutexArgs( FunctionDecl decl, bool & first ) {
[64adb03]	540	std::list<DeclarationWithType*> mutexArgs;
	541
[db4d8e3]	542	bool once = true;
[64adb03]	543	for( auto arg : decl->get_functionType()->get_parameters()) {
	544	//Find mutex arguments
	545	Type* ty = arg->get_type();
[615a096]	546	if( ! ty->get_mutex() ) continue;
[64adb03]	547
[db4d8e3]	548	if(once) {first = true;}
	549	once = false;
	550
[64adb03]	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
[870d1f0]	562	ReferenceType* rty = dynamic_cast< ReferenceType * >( ty );
[a16764a6]	563	if( ! rty ) SemanticError( arg, "Mutex argument must be of reference type " );
[64adb03]	564
	565	//Make sure the we are pointing directly to a type
[83a071f9]	566	Type* base = rty->get_base();
[a16764a6]	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 " );
[64adb03]	569
	570	//Make sure that typed isn't mutex
[a16764a6]	571	if( base->get_mutex() ) SemanticError( arg, "mutex keyword may only appear once per argument " );
[64adb03]	572	}
	573
[549c006]	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",
[ba3706f]	580	noStorageClasses,
[549c006]	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 :
[2bf7ef6]	599	// monitor_dtor_guard_t __guard = { __monitors, func };
[549c006]	600	body->push_front(
[ba3706f]	601	new DeclStmt( new ObjectDecl(
[549c006]	602	"__guard",
[ba3706f]	603	noStorageClasses,
[549c006]	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) };
[ba3706f]	622	body->push_front( new DeclStmt( monitors) );
[549c006]	623	}
	624
[97e3296]	625	void MutexKeyword::addStatments( FunctionDecl* func, CompoundStmt * body, const std::list<DeclarationWithType * > & args ) {
[9243cc91]	626	ObjectDecl * monitors = new ObjectDecl(
	627	"__monitors",
[ba3706f]	628	noStorageClasses,
[9243cc91]	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(
[bd41764]	645	map_range < std::list<Initializer> > ( args, [](DeclarationWithType var ){
[cb0e6de]	646	Type * type = var->get_type()->clone();
	647	type->set_mutex( false );
[9243cc91]	648	return new SingleInit( new UntypedExpr(
	649	new NameExpr( "get_monitor" ),
[cb0e6de]	650	{ new CastExpr( new VariableExpr( var ), type ) }
[9243cc91]	651	) );
	652	})
	653	)
	654	);
	655
[97e3296]	656	assert(generic_func);
	657
[2bf7ef6]	658	// in reverse order :
[97e3296]	659	// monitor_guard_t __guard = { __monitors, #, func };
[64adb03]	660	body->push_front(
[ba3706f]	661	new DeclStmt( new ObjectDecl(
[64adb03]	662	"__guard",
[ba3706f]	663	noStorageClasses,
[64adb03]	664	LinkageSpec::Cforall,
	665	nullptr,
	666	new StructInstType(
	667	noQualifiers,
[ef42b143]	668	guard_decl
[64adb03]	669	),
	670	new ListInit(
	671	{
[9243cc91]	672	new SingleInit( new VariableExpr( monitors ) ),
[97e3296]	673	new SingleInit( new ConstantExpr( Constant::from_ulong( args.size() ) ) ),
	674	new SingleInit( new CastExpr( new VariableExpr( func ), generic_func->clone() ) )
[ef42b143]	675	},
	676	noDesignators,
	677	true
[64adb03]	678	)
	679	))
	680	);
	681
[ef42b143]	682	//monitor_desc * __monitors[] = { get_monitor(a), get_monitor(b) };
[ba3706f]	683	body->push_front( new DeclStmt( monitors) );
[64adb03]	684	}
[bd4d011]	685
	686	//=============================================================================================
	687	// General entry routine
	688	//=============================================================================================
[549c006]	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
[2065609]	696	void ThreadStarter::postvisit(FunctionDecl * decl) {
[9f5ecf5]	697	if( ! CodeGen::isConstructor(decl->name) ) return;
[bd4d011]	698
[549c006]	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
[bd4d011]	705	DeclarationWithType * param = decl->get_functionType()->get_parameters().front();
[ce8c12f]	706	auto type = dynamic_cast< StructInstType * >( InitTweak::getPointerBase( param->get_type() ) );
[bd4d011]	707	if( type && type->get_baseStruct()->is_thread() ) {
[549c006]	708	if( !thread_decl \|\| !thread_ctor_seen ) {
[73abe95]	709	SemanticError( type->get_baseStruct()->location, "thread keyword requires threads to be in scope, add #include <thread.hfa>");
[549c006]	710	}
	711
[bd4d011]	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
[bf2438c]	721	stmt->push_back(
[bd4d011]	722	new ExprStmt(
	723	new UntypedExpr(
	724	new NameExpr( "__thrd_start" ),
	725	{ new VariableExpr( param ) }
	726	)
	727	)
	728	);
	729	}
[68fe077a]	730	};
[6b0b624]	731
	732	// Local Variables: //
	733	// mode: c //
	734	// tab-width: 4 //
	735	// End: //

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