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source: src/Concurrency/Keywords.cc@ 1b033b8

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ADT arm-eh ast-experimental enum forall-pointer-decay jacob/cs343-translation new-ast-unique-expr pthread-emulation qualifiedEnum

Last change on this file since 1b033b8 was ab8c6a6, checked in by Andrew Beach <ajbeach@…>, 5 years ago
Thread Cancellation, a test for it and a required fix to Specialization.
Property mode set to `100644`
File size: 34.9 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 :
[07de76b]	13	// Update Count : 10
[64adb03]	14	//
	15
	16	#include "Concurrency/Keywords.h"
	17
[427854b]	18	#include <cassert> // for assert
	19	#include <string> // for string, operator==
	20
[1c01c58]	21	#include <iostream>
	22
	23	#include "Common/Examine.h" // for isMainFor
[427854b]	24	#include "Common/PassVisitor.h" // for PassVisitor
	25	#include "Common/SemanticError.h" // for SemanticError
	26	#include "Common/utility.h" // for deleteAll, map_range
	27	#include "CodeGen/OperatorTable.h" // for isConstructor
	28	#include "ControlStruct/LabelGenerator.h" // for LebelGenerator
	29	#include "InitTweak/InitTweak.h" // for getPointerBase
	30	#include "SynTree/LinkageSpec.h" // for Cforall
	31	#include "SynTree/Constant.h" // for Constant
	32	#include "SynTree/Declaration.h" // for StructDecl, FunctionDecl, ObjectDecl
	33	#include "SynTree/Expression.h" // for VariableExpr, ConstantExpr, Untype...
	34	#include "SynTree/Initializer.h" // for SingleInit, ListInit, Initializer ...
	35	#include "SynTree/Label.h" // for Label
	36	#include "SynTree/Statement.h" // for CompoundStmt, DeclStmt, ExprStmt
	37	#include "SynTree/Type.h" // for StructInstType, Type, PointerType
	38	#include "SynTree/Visitor.h" // for Visitor, acceptAll
[1c01c58]	39	#include "Virtual/Tables.h"
[bf2438c]	40
	41	class Attribute;
[64adb03]	42
	43	namespace Concurrency {
[1c01c58]	44	inline static std::string getVTableName( std::string const & exception_name ) {
	45	return exception_name.empty() ? std::string() : Virtual::vtableTypeName(exception_name);
	46	}
	47
[ab8c6a6]	48	// Only detects threads constructed with the keyword thread.
	49	inline static bool isThread( DeclarationWithType * decl ) {
	50	Type * baseType = decl->get_type()->stripDeclarator();
	51	StructInstType * instType = dynamic_cast<StructInstType *>( baseType );
	52	if ( nullptr == instType ) { return false; }
	53	return instType->baseStruct->is_thread();
	54	}
	55
[64adb03]	56	//=============================================================================================
[2065609]	57	// Pass declarations
[64adb03]	58	//=============================================================================================
	59
[bcda04c]	60	//-----------------------------------------------------------------------------
	61	//Handles sue type declarations :
	62	// sue MyType { struct MyType {
	63	// int data; int data;
	64	// a_struct_t more_data; a_struct_t more_data;
	65	// => NewField_t newField;
	66	// }; };
	67	// static inline NewField_t * getter_name( MyType * this ) { return &this->newField; }
	68	//
[2065609]	69	class ConcurrentSueKeyword : public WithDeclsToAdd {
[bcda04c]	70	public:
	71
[1c01c58]	72	ConcurrentSueKeyword( std::string&& type_name, std::string&& field_name,
	73	std::string&& getter_name, std::string&& context_error, std::string&& exception_name,
	74	bool needs_main, AggregateDecl::Aggregate cast_target ) :
	75	type_name( type_name ), field_name( field_name ), getter_name( getter_name ),
[69c5c00]	76	context_error( context_error ), exception_name( exception_name ),
	77	vtable_name( getVTableName( exception_name ) ),
[1c01c58]	78	needs_main( needs_main ), cast_target( cast_target ) {}
[bcda04c]	79
	80	virtual ~ConcurrentSueKeyword() {}
	81
[9a705dc8]	82	Declaration * postmutate( StructDecl * decl );
[6c3a5ac1]	83	DeclarationWithType * postmutate( FunctionDecl * decl );
[bcda04c]	84
	85	void handle( StructDecl * );
[1c01c58]	86	void addVtableForward( StructDecl * );
[bcda04c]	87	FunctionDecl * forwardDeclare( StructDecl * );
	88	ObjectDecl * addField( StructDecl * );
[2f9a722]	89	void addRoutines( ObjectDecl , FunctionDecl );
[bcda04c]	90
	91	virtual bool is_target( StructDecl * decl ) = 0;
	92
[9a705dc8]	93	Expression * postmutate( KeywordCastExpr * cast );
	94
[bcda04c]	95	private:
	96	const std::string type_name;
	97	const std::string field_name;
	98	const std::string getter_name;
	99	const std::string context_error;
[69c5c00]	100	const std::string exception_name;
[1c01c58]	101	const std::string vtable_name;
[bd4d011]	102	bool needs_main;
[312029a]	103	AggregateDecl::Aggregate cast_target;
[bcda04c]	104
[6c3a5ac1]	105	StructDecl * type_decl = nullptr;
	106	FunctionDecl * dtor_decl = nullptr;
[69c5c00]	107	StructDecl * except_decl = nullptr;
[1c01c58]	108	StructDecl * vtable_decl = nullptr;
[bcda04c]	109	};
	110
	111
[64adb03]	112	//-----------------------------------------------------------------------------
	113	//Handles thread type declarations :
	114	// thread Mythread { struct MyThread {
	115	// int data; int data;
	116	// a_struct_t more_data; a_struct_t more_data;
[ac2b598]	117	// => $thread __thrd_d;
[64adb03]	118	// }; };
[ac2b598]	119	// static inline $thread * get_thread( MyThread * this ) { return &this->__thrd_d; }
[64adb03]	120	//
[bcda04c]	121	class ThreadKeyword final : public ConcurrentSueKeyword {
[64adb03]	122	public:
	123
[bcda04c]	124	ThreadKeyword() : ConcurrentSueKeyword(
[ac2b598]	125	"$thread",
[bcda04c]	126	"__thrd",
	127	"get_thread",
[6c3a5ac1]	128	"thread keyword requires threads to be in scope, add #include <thread.hfa>\n",
[ab8c6a6]	129	"ThreadCancelled",
[9a705dc8]	130	true,
[312029a]	131	AggregateDecl::Thread
[bcda04c]	132	)
	133	{}
	134
	135	virtual ~ThreadKeyword() {}
	136
	137	virtual bool is_target( StructDecl * decl ) override final { return decl->is_thread(); }
	138
	139	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	140	PassVisitor< ThreadKeyword > impl;
[9a705dc8]	141	mutateAll( translationUnit, impl );
[bcda04c]	142	}
[64adb03]	143	};
	144
	145	//-----------------------------------------------------------------------------
	146	//Handles coroutine type declarations :
	147	// coroutine MyCoroutine { struct MyCoroutine {
	148	// int data; int data;
	149	// a_struct_t more_data; a_struct_t more_data;
[ac2b598]	150	// => $coroutine __cor_d;
[64adb03]	151	// }; };
[ac2b598]	152	// static inline $coroutine * get_coroutine( MyCoroutine * this ) { return &this->__cor_d; }
[64adb03]	153	//
[bcda04c]	154	class CoroutineKeyword final : public ConcurrentSueKeyword {
[64adb03]	155	public:
	156
[bcda04c]	157	CoroutineKeyword() : ConcurrentSueKeyword(
[ac2b598]	158	"$coroutine",
[bcda04c]	159	"__cor",
	160	"get_coroutine",
[6c3a5ac1]	161	"coroutine keyword requires coroutines to be in scope, add #include <coroutine.hfa>\n",
[1c01c58]	162	"CoroutineCancelled",
[9a705dc8]	163	true,
[312029a]	164	AggregateDecl::Coroutine
[bcda04c]	165	)
	166	{}
[b32ada31]	167
[bcda04c]	168	virtual ~CoroutineKeyword() {}
	169
	170	virtual bool is_target( StructDecl * decl ) override final { return decl->is_coroutine(); }
[b32ada31]	171
	172	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	173	PassVisitor< CoroutineKeyword > impl;
[9a705dc8]	174	mutateAll( translationUnit, impl );
[b32ada31]	175	}
[64adb03]	176	};
	177
[427854b]	178
	179
[64adb03]	180	//-----------------------------------------------------------------------------
	181	//Handles monitor type declarations :
	182	// monitor MyMonitor { struct MyMonitor {
	183	// int data; int data;
	184	// a_struct_t more_data; a_struct_t more_data;
[ac2b598]	185	// => $monitor __mon_d;
[64adb03]	186	// }; };
[ac2b598]	187	// static inline $monitor * get_coroutine( MyMonitor * this ) { return &this->__cor_d; }
[64adb03]	188	//
[bcda04c]	189	class MonitorKeyword final : public ConcurrentSueKeyword {
[64adb03]	190	public:
	191
[bcda04c]	192	MonitorKeyword() : ConcurrentSueKeyword(
[ac2b598]	193	"$monitor",
[bcda04c]	194	"__mon",
	195	"get_monitor",
[6c3a5ac1]	196	"monitor keyword requires monitors to be in scope, add #include <monitor.hfa>\n",
[1c01c58]	197	"",
[9a705dc8]	198	false,
[312029a]	199	AggregateDecl::Monitor
[bcda04c]	200	)
	201	{}
	202
	203	virtual ~MonitorKeyword() {}
	204
	205	virtual bool is_target( StructDecl * decl ) override final { return decl->is_monitor(); }
	206
	207	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	208	PassVisitor< MonitorKeyword > impl;
[9a705dc8]	209	mutateAll( translationUnit, impl );
[bcda04c]	210	}
[64adb03]	211	};
	212
[427854b]	213	//-----------------------------------------------------------------------------
	214	//Handles generator type declarations :
	215	// generator MyGenerator { struct MyGenerator {
	216	// int data; int data;
	217	// a_struct_t more_data; a_struct_t more_data;
	218	// => int __gen_next;
	219	// }; };
	220	//
	221	class GeneratorKeyword final : public ConcurrentSueKeyword {
	222	public:
	223
	224	GeneratorKeyword() : ConcurrentSueKeyword(
	225	"$generator",
	226	"__generator_state",
	227	"get_generator",
	228	"Unable to find builtin type $generator\n",
[1c01c58]	229	"",
[427854b]	230	true,
	231	AggregateDecl::Generator
	232	)
	233	{}
	234
	235	virtual ~GeneratorKeyword() {}
	236
	237	virtual bool is_target( StructDecl * decl ) override final { return decl->is_generator(); }
	238
	239	static void implement( std::list< Declaration * > & translationUnit ) {
	240	PassVisitor< GeneratorKeyword > impl;
	241	mutateAll( translationUnit, impl );
	242	}
	243	};
	244
	245
	246	//-----------------------------------------------------------------------------
	247	class SuspendKeyword final : public WithStmtsToAdd, public WithGuards {
	248	public:
	249	SuspendKeyword() = default;
	250	virtual ~SuspendKeyword() = default;
	251
	252	void premutate( FunctionDecl * );
	253	DeclarationWithType * postmutate( FunctionDecl * );
	254
	255	Statement * postmutate( SuspendStmt * );
	256
	257	static void implement( std::list< Declaration * > & translationUnit ) {
	258	PassVisitor< SuspendKeyword > impl;
	259	mutateAll( translationUnit, impl );
	260	}
	261
	262	private:
	263	bool is_real_suspend( FunctionDecl * );
	264
	265	Statement * make_generator_suspend( SuspendStmt * );
	266	Statement * make_coroutine_suspend( SuspendStmt * );
	267
	268	struct LabelPair {
	269	Label obj;
	270	int idx;
	271	};
	272
	273	LabelPair make_label() {
	274	labels.push_back( gen.newLabel("generator") );
	275	return { labels.back(), int(labels.size()) };
	276	}
	277
	278	DeclarationWithType * in_generator = nullptr;
	279	FunctionDecl * decl_suspend = nullptr;
	280	std::vector<Label> labels;
	281	ControlStruct::LabelGenerator & gen = *ControlStruct::LabelGenerator::getGenerator();
	282	};
	283
[64adb03]	284	//-----------------------------------------------------------------------------
	285	//Handles mutex routines definitions :
	286	// void foo( A * mutex a, B * mutex b, int i ) { void foo( A * a, B * b, int i ) {
[ac2b598]	287	// $monitor * __monitors[] = { get_monitor(a), get_monitor(b) };
[64adb03]	288	// monitor_guard_t __guard = { __monitors, 2 };
	289	// /Some code/ => /Some code/
	290	// } }
	291	//
[2065609]	292	class MutexKeyword final {
[64adb03]	293	public:
	294
[2065609]	295	void postvisit( FunctionDecl * decl );
	296	void postvisit( StructDecl * decl );
[64adb03]	297
[db4d8e3]	298	std::list<DeclarationWithType> findMutexArgs( FunctionDecl, bool & first );
[64adb03]	299	void validate( DeclarationWithType * );
[ab8c6a6]	300	void addDtorStatements( FunctionDecl* func, CompoundStmt , const std::list<DeclarationWithType > &);
	301	void addStatements( FunctionDecl* func, CompoundStmt , const std::list<DeclarationWithType > &);
	302	void addThreadDtorStatements( FunctionDecl* func, CompoundStmt * body, const std::list<DeclarationWithType * > & args );
[64adb03]	303
	304	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	305	PassVisitor< MutexKeyword > impl;
[64adb03]	306	acceptAll( translationUnit, impl );
	307	}
[9243cc91]	308
	309	private:
	310	StructDecl* monitor_decl = nullptr;
[ef42b143]	311	StructDecl* guard_decl = nullptr;
[549c006]	312	StructDecl* dtor_guard_decl = nullptr;
[ab8c6a6]	313	StructDecl* thread_guard_decl = nullptr;
[97e3296]	314
	315	static std::unique_ptr< Type > generic_func;
[64adb03]	316	};
	317
[97e3296]	318	std::unique_ptr< Type > MutexKeyword::generic_func = std::unique_ptr< Type >(
	319	new FunctionType(
	320	noQualifiers,
	321	true
	322	)
	323	);
	324
[bd4d011]	325	//-----------------------------------------------------------------------------
	326	//Handles mutex routines definitions :
	327	// void foo( A * mutex a, B * mutex b, int i ) { void foo( A * a, B * b, int i ) {
[ac2b598]	328	// $monitor * __monitors[] = { get_monitor(a), get_monitor(b) };
[bd4d011]	329	// monitor_guard_t __guard = { __monitors, 2 };
	330	// /Some code/ => /Some code/
	331	// } }
	332	//
[2065609]	333	class ThreadStarter final {
[bd4d011]	334	public:
	335
[2065609]	336	void postvisit( FunctionDecl * decl );
[549c006]	337	void previsit ( StructDecl * decl );
[bd4d011]	338
	339	void addStartStatement( FunctionDecl * decl, DeclarationWithType * param );
	340
	341	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	342	PassVisitor< ThreadStarter > impl;
[bd4d011]	343	acceptAll( translationUnit, impl );
	344	}
[549c006]	345
	346	private :
	347	bool thread_ctor_seen = false;
	348	StructDecl * thread_decl = nullptr;
[bd4d011]	349	};
	350
[64adb03]	351	//=============================================================================================
	352	// General entry routine
	353	//=============================================================================================
	354	void applyKeywords( std::list< Declaration * > & translationUnit ) {
	355	ThreadKeyword ::implement( translationUnit );
	356	CoroutineKeyword ::implement( translationUnit );
	357	MonitorKeyword ::implement( translationUnit );
[427854b]	358	GeneratorKeyword ::implement( translationUnit );
	359	SuspendKeyword ::implement( translationUnit );
[bcda04c]	360	}
	361
	362	void implementMutexFuncs( std::list< Declaration * > & translationUnit ) {
[64adb03]	363	MutexKeyword ::implement( translationUnit );
	364	}
	365
[bcda04c]	366	void implementThreadStarter( std::list< Declaration * > & translationUnit ) {
[bd4d011]	367	ThreadStarter ::implement( translationUnit );
[bcda04c]	368	}
	369
[b32ada31]	370	//=============================================================================================
[bcda04c]	371	// Generic keyword implementation
[b32ada31]	372	//=============================================================================================
[2db79e5]	373	void fixupGenerics(FunctionType * func, StructDecl * decl) {
	374	cloneAll(decl->parameters, func->forall);
	375	for ( TypeDecl * td : func->forall ) {
	376	strict_dynamic_cast<StructInstType*>(
	377	func->parameters.front()->get_type()->stripReferences()
	378	)->parameters.push_back(
	379	new TypeExpr( new TypeInstType( noQualifiers, td->name, td ) )
	380	);
	381	}
	382	}
	383
[9a705dc8]	384	Declaration * ConcurrentSueKeyword::postmutate(StructDecl * decl) {
[9f5ecf5]	385	if( decl->name == type_name && decl->body ) {
[bcda04c]	386	assert( !type_decl );
	387	type_decl = decl;
[b32ada31]	388	}
[bcda04c]	389	else if ( is_target(decl) ) {
[b32ada31]	390	handle( decl );
	391	}
[69c5c00]	392	else if ( !except_decl && exception_name == decl->name && decl->body ) {
	393	except_decl = decl;
	394	}
[1c01c58]	395	else if ( !vtable_decl && vtable_name == decl->name && decl->body ) {
	396	vtable_decl = decl;
	397	}
	398	// Might be able to get ride of is target.
	399	assert( is_target(decl) == (cast_target == decl->kind) );
[9a705dc8]	400	return decl;
[b32ada31]	401	}
	402
[6c3a5ac1]	403	DeclarationWithType * ConcurrentSueKeyword::postmutate( FunctionDecl * decl ) {
[1c01c58]	404	if ( type_decl && isDestructorFor( decl, type_decl ) )
	405	dtor_decl = decl;
	406	else if ( vtable_name.empty() )
	407	;
	408	else if ( auto param = isMainFor( decl, cast_target ) ) {
	409	// This should never trigger.
	410	assert( vtable_decl );
	411	// Should be safe because of isMainFor.
	412	StructInstType * struct_type = static_cast<StructInstType *>(
	413	static_cast<ReferenceType *>( param->get_type() )->base );
	414	assert( struct_type );
	415
[69c5c00]	416	std::list< Expression * > poly_args = { new TypeExpr( struct_type->clone() ) };
	417	ObjectDecl * vtable_object = Virtual::makeVtableInstance(
	418	vtable_decl->makeInst( poly_args ), struct_type, nullptr );
	419	declsToAddAfter.push_back( vtable_object );
	420	declsToAddAfter.push_back( Virtual::makeGetExceptionFunction(
	421	vtable_object, except_decl->makeInst( std::move( poly_args ) )
	422	) );
[1c01c58]	423	}
[6c3a5ac1]	424
	425	return decl;
	426	}
	427
[9a705dc8]	428	Expression * ConcurrentSueKeyword::postmutate( KeywordCastExpr * cast ) {
	429	if ( cast_target == cast->target ) {
[ac2b598]	430	// convert (thread &)t to ($thread &)*get_thread(t), etc.
[9a705dc8]	431	if( !type_decl ) SemanticError( cast, context_error );
[6c3a5ac1]	432	if( !dtor_decl ) SemanticError( cast, context_error );
[3b0c8cb]	433	assert( cast->result == nullptr );
	434	cast->set_result( new ReferenceType( noQualifiers, new StructInstType( noQualifiers, type_decl ) ) );
	435	cast->concrete_target.field = field_name;
	436	cast->concrete_target.getter = getter_name;
[9a705dc8]	437	}
	438	return cast;
	439	}
	440
	441
[bcda04c]	442	void ConcurrentSueKeyword::handle( StructDecl * decl ) {
[9f5ecf5]	443	if( ! decl->body ) return;
[b32ada31]	444
[a16764a6]	445	if( !type_decl ) SemanticError( decl, context_error );
[6c3a5ac1]	446	if( !dtor_decl ) SemanticError( decl, context_error );
[b32ada31]	447
[1c01c58]	448	addVtableForward( decl );
[bcda04c]	449	FunctionDecl * func = forwardDeclare( decl );
	450	ObjectDecl * field = addField( decl );
[2f9a722]	451	addRoutines( field, func );
[b32ada31]	452	}
	453
[1c01c58]	454	void ConcurrentSueKeyword::addVtableForward( StructDecl * decl ) {
	455	if ( vtable_decl ) {
[69c5c00]	456	std::list< Expression * > poly_args = {
[1c01c58]	457	new TypeExpr( new StructInstType( noQualifiers, decl ) ),
[69c5c00]	458	};
	459	declsToAddBefore.push_back( Virtual::makeGetExceptionForward(
	460	vtable_decl->makeInst( poly_args ),
	461	except_decl->makeInst( poly_args )
	462	) );
	463	declsToAddBefore.push_back( Virtual::makeVtableForward(
	464	vtable_decl->makeInst( move( poly_args ) ) ) );
[1c01c58]	465	// Its only an error if we want a vtable and don't have one.
	466	} else if ( ! vtable_name.empty() ) {
	467	SemanticError( decl, context_error );
	468	}
	469	}
	470
[bcda04c]	471	FunctionDecl * ConcurrentSueKeyword::forwardDeclare( StructDecl * decl ) {
	472
	473	StructDecl * forward = decl->clone();
	474	forward->set_body( false );
	475	deleteAll( forward->get_members() );
	476	forward->get_members().clear();
	477
[bd4d011]	478	FunctionType * get_type = new FunctionType( noQualifiers, false );
[bcda04c]	479	ObjectDecl * this_decl = new ObjectDecl(
	480	"this",
[ba3706f]	481	noStorageClasses,
[b32ada31]	482	LinkageSpec::Cforall,
	483	nullptr,
[83a071f9]	484	new ReferenceType(
[b32ada31]	485	noQualifiers,
[bcda04c]	486	new StructInstType(
	487	noQualifiers,
	488	decl
	489	)
[b32ada31]	490	),
	491	nullptr
	492	);
	493
[2db79e5]	494	get_type->get_parameters().push_back( this_decl->clone() );
[bd4d011]	495	get_type->get_returnVals().push_back(
[e04b636]	496	new ObjectDecl(
	497	"ret",
[ba3706f]	498	noStorageClasses,
[e04b636]	499	LinkageSpec::Cforall,
	500	nullptr,
	501	new PointerType(
	502	noQualifiers,
	503	new StructInstType(
	504	noQualifiers,
[bcda04c]	505	type_decl
[e04b636]	506	)
	507	),
	508	nullptr
	509	)
	510	);
[2db79e5]	511	fixupGenerics(get_type, decl);
[b32ada31]	512
[bcda04c]	513	FunctionDecl * get_decl = new FunctionDecl(
	514	getter_name,
	515	Type::Static,
	516	LinkageSpec::Cforall,
[bd4d011]	517	get_type,
[bcda04c]	518	nullptr,
[a8078eef]	519	{ new Attribute("const") },
[bcda04c]	520	Type::Inline
	521	);
	522
[bd4d011]	523	FunctionDecl * main_decl = nullptr;
	524
	525	if( needs_main ) {
	526	FunctionType * main_type = new FunctionType( noQualifiers, false );
[bf2438c]	527
[bd4d011]	528	main_type->get_parameters().push_back( this_decl->clone() );
	529
	530	main_decl = new FunctionDecl(
	531	"main",
[ba3706f]	532	noStorageClasses,
[bd4d011]	533	LinkageSpec::Cforall,
	534	main_type,
	535	nullptr
	536	);
[2db79e5]	537	fixupGenerics(main_type, decl);
[bd4d011]	538	}
	539
[2db79e5]	540	delete this_decl;
	541
[2065609]	542	declsToAddBefore.push_back( forward );
	543	if( needs_main ) declsToAddBefore.push_back( main_decl );
	544	declsToAddBefore.push_back( get_decl );
[bcda04c]	545
	546	return get_decl;
	547	}
	548
	549	ObjectDecl * ConcurrentSueKeyword::addField( StructDecl * decl ) {
	550	ObjectDecl * field = new ObjectDecl(
	551	field_name,
[ba3706f]	552	noStorageClasses,
[bcda04c]	553	LinkageSpec::Cforall,
	554	nullptr,
	555	new StructInstType(
	556	noQualifiers,
	557	type_decl
	558	),
	559	nullptr
	560	);
	561
	562	decl->get_members().push_back( field );
	563
	564	return field;
	565	}
	566
[2f9a722]	567	void ConcurrentSueKeyword::addRoutines( ObjectDecl * field, FunctionDecl * func ) {
[ba3706f]	568	CompoundStmt * statement = new CompoundStmt();
[bf2438c]	569	statement->push_back(
[b32ada31]	570	new ReturnStmt(
[e04b636]	571	new AddressExpr(
[bcda04c]	572	new MemberExpr(
	573	field,
[2db79e5]	574	new CastExpr(
	575	new VariableExpr( func->get_functionType()->get_parameters().front() ),
[b81fd95]	576	func->get_functionType()->get_parameters().front()->get_type()->stripReferences()->clone(),
	577	false
[2db79e5]	578	)
[e04b636]	579	)
[b32ada31]	580	)
	581	)
	582	);
	583
[bcda04c]	584	FunctionDecl * get_decl = func->clone();
	585
	586	get_decl->set_statements( statement );
[e04b636]	587
	588	declsToAddAfter.push_back( get_decl );
[427854b]	589	}
	590
	591	//=============================================================================================
	592	// Suspend keyword implementation
	593	//=============================================================================================
	594	bool SuspendKeyword::is_real_suspend( FunctionDecl * func ) {
	595	if(isMangled(func->linkage)) return false; // the real suspend isn't mangled
	596	if(func->name != "__cfactx_suspend") return false; // the real suspend has a specific name
	597	if(func->type->parameters.size() != 0) return false; // Too many parameters
	598	if(func->type->returnVals.size() != 0) return false; // Too many return values
	599
	600	return true;
[b32ada31]	601	}
	602
[427854b]	603	void SuspendKeyword::premutate( FunctionDecl * func ) {
	604	GuardValue(in_generator);
	605	in_generator = nullptr;
	606
	607	// Is this the real suspend?
	608	if(is_real_suspend(func)) {
	609	decl_suspend = decl_suspend ? decl_suspend : func;
	610	return;
	611	}
	612
	613	// Is this the main of a generator?
[1c01c58]	614	auto param = isMainFor( func, AggregateDecl::Aggregate::Generator );
[427854b]	615	if(!param) return;
	616
	617	if(func->type->returnVals.size() != 0) SemanticError(func->location, "Generator main must return void");
	618
	619	in_generator = param;
	620	GuardValue(labels);
	621	labels.clear();
	622	}
	623
	624	DeclarationWithType * SuspendKeyword::postmutate( FunctionDecl * func ) {
	625	if( !func->statements ) return func; // Not the actual definition, don't do anything
	626	if( !in_generator ) return func; // Not in a generator, don't do anything
	627	if( labels.empty() ) return func; // Generator has no states, nothing to do, could throw a warning
	628
	629	// This is a generator main, we need to add the following code to the top
	630	// static void * __generator_labels[] = {&&s0, &&s1, ...};
	631	// goto * __generator_labels[gen.__generator_state];
	632	const auto & loc = func->location;
	633
	634	const auto first_label = gen.newLabel("generator");
	635
	636	// for each label add to declaration
	637	std::list<Initializer*> inits = { new SingleInit( new LabelAddressExpr( first_label ) ) };
	638	for(const auto & label : labels) {
	639	inits.push_back(
	640	new SingleInit(
	641	new LabelAddressExpr( label )
	642	)
	643	);
	644	}
	645	auto init = new ListInit(std::move(inits), noDesignators, true);
	646	labels.clear();
	647
	648	// create decl
	649	auto decl = new ObjectDecl(
	650	"__generator_labels",
	651	Type::StorageClasses( Type::Static ),
	652	LinkageSpec::AutoGen,
	653	nullptr,
	654	new ArrayType(
	655	Type::Qualifiers(),
	656	new PointerType(
	657	Type::Qualifiers(),
	658	new VoidType( Type::Qualifiers() )
	659	),
	660	nullptr,
	661	false, false
	662	),
	663	init
	664	);
	665
	666	// create the goto
	667	assert(in_generator);
	668
	669	auto go_decl = new ObjectDecl(
	670	"__generator_label",
	671	noStorageClasses,
	672	LinkageSpec::AutoGen,
	673	nullptr,
	674	new PointerType(
	675	Type::Qualifiers(),
	676	new VoidType( Type::Qualifiers() )
	677	),
	678	new SingleInit(
	679	new UntypedExpr(
	680	new NameExpr("?[?]"),
	681	{
	682	new NameExpr("__generator_labels"),
	683	new UntypedMemberExpr(
	684	new NameExpr("__generator_state"),
	685	new VariableExpr( in_generator )
	686	)
	687	}
	688	)
	689	)
	690	);
	691	go_decl->location = loc;
	692
	693	auto go = new BranchStmt(
	694	new VariableExpr( go_decl ),
	695	BranchStmt::Goto
	696	);
	697	go->location = loc;
	698	go->computedTarget->location = loc;
	699
	700	auto noop = new NullStmt({ first_label });
	701	noop->location = loc;
	702
	703	// wrap everything in a nice compound
	704	auto body = new CompoundStmt({
	705	new DeclStmt( decl ),
	706	new DeclStmt( go_decl ),
	707	go,
	708	noop,
	709	func->statements
	710	});
	711	body->location = loc;
	712	func->statements = body;
	713
	714	return func;
	715	}
	716
	717	Statement * SuspendKeyword::postmutate( SuspendStmt * stmt ) {
	718	SuspendStmt::Type type = stmt->type;
	719	if(type == SuspendStmt::None) {
	720	// This suspend has a implicit target, find it
	721	type = in_generator ? SuspendStmt::Generator : SuspendStmt::Coroutine;
	722	}
	723
	724	// Check that the target makes sense
	725	if(!in_generator && type == SuspendStmt::Generator) SemanticError( stmt->location, "'suspend generator' must be used inside main of generator type.");
	726
	727	// Act appropriately
	728	switch(type) {
	729	case SuspendStmt::Generator: return make_generator_suspend(stmt);
	730	case SuspendStmt::Coroutine: return make_coroutine_suspend(stmt);
	731	default: abort();
	732	}
	733	}
	734
	735	Statement * SuspendKeyword::make_generator_suspend( SuspendStmt * stmt ) {
	736	assert(in_generator);
	737	// Target code is :
	738	// gen.__generator_state = X;
	739	// { THEN }
	740	// return;
	741	// __gen_X:;
	742
	743	// Save the location and delete the old statement, we only need the location from this point on
	744	auto loc = stmt->location;
	745
	746	// Build the label and get its index
	747	auto label = make_label();
	748
	749	// Create the context saving statement
	750	auto save = new ExprStmt( new UntypedExpr(
	751	new NameExpr( "?=?" ),
	752	{
	753	new UntypedMemberExpr(
	754	new NameExpr("__generator_state"),
	755	new VariableExpr( in_generator )
	756	),
	757	new ConstantExpr(
	758	Constant::from_int( label.idx )
	759	)
	760	}
	761	));
	762	assert(save->expr);
	763	save->location = loc;
	764	stmtsToAddBefore.push_back( save );
	765
	766	// if we have a then add it here
	767	auto then = stmt->then;
	768	stmt->then = nullptr;
	769	delete stmt;
	770	if(then) stmtsToAddBefore.push_back( then );
	771
	772	// Create the return statement
	773	auto ret = new ReturnStmt( nullptr );
	774	ret->location = loc;
	775	stmtsToAddBefore.push_back( ret );
	776
	777	// Create the null statement with the created label
	778	auto noop = new NullStmt({ label.obj });
	779	noop->location = loc;
	780
	781	// Return the null statement to take the place of the previous statement
	782	return noop;
	783	}
	784
	785	Statement * SuspendKeyword::make_coroutine_suspend( SuspendStmt * stmt ) {
	786	if(stmt->then) SemanticError( stmt->location, "Compound statement following coroutines is not implemented.");
	787
	788	// Save the location and delete the old statement, we only need the location from this point on
	789	auto loc = stmt->location;
	790	delete stmt;
	791
	792	// Create the call expression
	793	if(!decl_suspend) SemanticError( loc, "suspend keyword applied to coroutines requires coroutines to be in scope, add #include <coroutine.hfa>\n");
	794	auto expr = new UntypedExpr( VariableExpr::functionPointer( decl_suspend ) );
[e6cfa8ff]	795	expr->location = loc;
[427854b]	796
	797	// Change this statement into a regular expr
	798	assert(expr);
	799	auto nstmt = new ExprStmt( expr );
[e6cfa8ff]	800	nstmt->location = loc;
[427854b]	801	return nstmt;
	802	}
	803
	804
[64adb03]	805	//=============================================================================================
	806	// Mutex keyword implementation
	807	//=============================================================================================
[97e3296]	808
[2065609]	809	void MutexKeyword::postvisit(FunctionDecl* decl) {
[102a58b]	810
[db4d8e3]	811	bool first = false;
	812	std::list<DeclarationWithType*> mutexArgs = findMutexArgs( decl, first );
[ab8c6a6]	813	bool const isDtor = CodeGen::isDestructor( decl->name );
[64adb03]	814
[ceedde6]	815	// Is this function relevant to monitors
	816	if( mutexArgs.empty() ) {
	817	// If this is the destructor for a monitor it must be mutex
	818	if(isDtor) {
	819	Type* ty = decl->get_functionType()->get_parameters().front()->get_type();
	820
	821	// If it's a copy, it's not a mutex
	822	ReferenceType* rty = dynamic_cast< ReferenceType * >( ty );
	823	if( ! rty ) return;
	824
	825	// If we are not pointing directly to a type, it's not a mutex
	826	Type* base = rty->get_base();
	827	if( dynamic_cast< ReferenceType * >( base ) ) return;
	828	if( dynamic_cast< PointerType * >( base ) ) return;
	829
	830	// Check if its a struct
	831	StructInstType * baseStruct = dynamic_cast< StructInstType * >( base );
	832	if( !baseStruct ) return;
	833
	834	// Check if its a monitor
	835	if(baseStruct->baseStruct->is_monitor() \|\| baseStruct->baseStruct->is_thread())
	836	SemanticError( decl, "destructors for structures declared as \"monitor\" must use mutex parameters\n" );
	837	}
	838	return;
	839	}
[549c006]	840
[ceedde6]	841	// Monitors can't be constructed with mutual exclusion
	842	if( CodeGen::isConstructor(decl->name) && !first ) SemanticError( decl, "constructors cannot have mutex parameters" );
[549c006]	843
[ceedde6]	844	// It makes no sense to have multiple mutex parameters for the destructor
[a16764a6]	845	if( isDtor && mutexArgs.size() != 1 ) SemanticError( decl, "destructors can only have 1 mutex argument" );
[549c006]	846
[ceedde6]	847	// Make sure all the mutex arguments are monitors
[64adb03]	848	for(auto arg : mutexArgs) {
	849	validate( arg );
	850	}
	851
[ceedde6]	852	// Check if we need to instrument the body
[64adb03]	853	CompoundStmt* body = decl->get_statements();
	854	if( ! body ) return;
	855
[ceedde6]	856	// Do we have the required headers
[a16764a6]	857	if( !monitor_decl \|\| !guard_decl \|\| !dtor_guard_decl )
[73abe95]	858	SemanticError( decl, "mutex keyword requires monitors to be in scope, add #include <monitor.hfa>\n" );
[b32ada31]	859
[ceedde6]	860	// Instrument the body
[ab8c6a6]	861	if ( isDtor && isThread( mutexArgs.front() ) ) {
	862	if( !thread_guard_decl ) {
	863	SemanticError( decl, "thread destructor requires threads to be in scope, add #include <thread.hfa>\n" );
	864	}
	865	addThreadDtorStatements( decl, body, mutexArgs );
	866	}
	867	else if ( isDtor ) {
	868	addDtorStatements( decl, body, mutexArgs );
[549c006]	869	}
	870	else {
[ab8c6a6]	871	addStatements( decl, body, mutexArgs );
[549c006]	872	}
[64adb03]	873	}
	874
[2065609]	875	void MutexKeyword::postvisit(StructDecl* decl) {
[102a58b]	876
[ac2b598]	877	if( decl->name == "$monitor" && decl->body ) {
[9243cc91]	878	assert( !monitor_decl );
	879	monitor_decl = decl;
	880	}
[88d955f]	881	else if( decl->name == "monitor_guard_t" && decl->body ) {
[ef42b143]	882	assert( !guard_decl );
	883	guard_decl = decl;
	884	}
[88d955f]	885	else if( decl->name == "monitor_dtor_guard_t" && decl->body ) {
[549c006]	886	assert( !dtor_guard_decl );
	887	dtor_guard_decl = decl;
	888	}
[ab8c6a6]	889	else if( decl->name == "thread_dtor_guard_t" && decl->body ) {
	890	assert( !thread_guard_decl );
	891	thread_guard_decl = decl;
	892	}
[9243cc91]	893	}
	894
[db4d8e3]	895	std::list<DeclarationWithType> MutexKeyword::findMutexArgs( FunctionDecl decl, bool & first ) {
[64adb03]	896	std::list<DeclarationWithType*> mutexArgs;
	897
[db4d8e3]	898	bool once = true;
[64adb03]	899	for( auto arg : decl->get_functionType()->get_parameters()) {
	900	//Find mutex arguments
	901	Type* ty = arg->get_type();
[615a096]	902	if( ! ty->get_mutex() ) continue;
[64adb03]	903
[db4d8e3]	904	if(once) {first = true;}
	905	once = false;
	906
[64adb03]	907	//Append it to the list
	908	mutexArgs.push_back( arg );
	909	}
	910
	911	return mutexArgs;
	912	}
	913
	914	void MutexKeyword::validate( DeclarationWithType * arg ) {
	915	Type* ty = arg->get_type();
	916
	917	//Makes sure it's not a copy
[870d1f0]	918	ReferenceType* rty = dynamic_cast< ReferenceType * >( ty );
[a16764a6]	919	if( ! rty ) SemanticError( arg, "Mutex argument must be of reference type " );
[64adb03]	920
	921	//Make sure the we are pointing directly to a type
[83a071f9]	922	Type* base = rty->get_base();
[a16764a6]	923	if( dynamic_cast< ReferenceType * >( base ) ) SemanticError( arg, "Mutex argument have exactly one level of indirection " );
	924	if( dynamic_cast< PointerType * >( base ) ) SemanticError( arg, "Mutex argument have exactly one level of indirection " );
[64adb03]	925
	926	//Make sure that typed isn't mutex
[a16764a6]	927	if( base->get_mutex() ) SemanticError( arg, "mutex keyword may only appear once per argument " );
[64adb03]	928	}
	929
[ab8c6a6]	930	void MutexKeyword::addDtorStatements( FunctionDecl* func, CompoundStmt * body, const std::list<DeclarationWithType * > & args ) {
[549c006]	931	Type * arg_type = args.front()->get_type()->clone();
	932	arg_type->set_mutex( false );
	933
	934	ObjectDecl * monitors = new ObjectDecl(
	935	"__monitor",
[ba3706f]	936	noStorageClasses,
[549c006]	937	LinkageSpec::Cforall,
	938	nullptr,
	939	new PointerType(
	940	noQualifiers,
	941	new StructInstType(
	942	noQualifiers,
	943	monitor_decl
	944	)
	945	),
	946	new SingleInit( new UntypedExpr(
	947	new NameExpr( "get_monitor" ),
[b81fd95]	948	{ new CastExpr( new VariableExpr( args.front() ), arg_type, false ) }
[549c006]	949	))
	950	);
	951
	952	assert(generic_func);
	953
	954	//in reverse order :
[2bf7ef6]	955	// monitor_dtor_guard_t __guard = { __monitors, func };
[549c006]	956	body->push_front(
[ba3706f]	957	new DeclStmt( new ObjectDecl(
[549c006]	958	"__guard",
[ba3706f]	959	noStorageClasses,
[549c006]	960	LinkageSpec::Cforall,
	961	nullptr,
	962	new StructInstType(
	963	noQualifiers,
	964	dtor_guard_decl
	965	),
	966	new ListInit(
	967	{
	968	new SingleInit( new AddressExpr( new VariableExpr( monitors ) ) ),
[77a2994]	969	new SingleInit( new CastExpr( new VariableExpr( func ), generic_func->clone(), false ) ),
	970	new SingleInit( new ConstantExpr( Constant::from_bool( false ) ) )
[549c006]	971	},
	972	noDesignators,
	973	true
	974	)
	975	))
	976	);
	977
[ac2b598]	978	//$monitor * __monitors[] = { get_monitor(a), get_monitor(b) };
[ab8c6a6]	979	body->push_front( new DeclStmt( monitors ) );
	980	}
	981
	982	void MutexKeyword::addThreadDtorStatements(
	983	FunctionDecl, CompoundStmt body,
	984	const std::list<DeclarationWithType * > & args ) {
	985	assert( args.size() == 1 );
	986	DeclarationWithType * arg = args.front();
	987	Type * arg_type = arg->get_type()->clone();
	988	assert( arg_type->get_mutex() );
	989	arg_type->set_mutex( false );
	990
	991	// thread_dtor_guard_t __guard = { this, intptr( 0 ) };
	992	body->push_front(
	993	new DeclStmt( new ObjectDecl(
	994	"__guard",
	995	noStorageClasses,
	996	LinkageSpec::Cforall,
	997	nullptr,
	998	new StructInstType(
	999	noQualifiers,
	1000	thread_guard_decl
	1001	),
	1002	new ListInit(
	1003	{
	1004	new SingleInit( new CastExpr( new VariableExpr( arg ), arg_type ) ),
	1005	new SingleInit( new UntypedExpr(
	1006	new NameExpr( "intptr" ), {
	1007	new ConstantExpr( Constant::from_int( 0 ) ),
	1008	}
	1009	) ),
	1010	},
	1011	noDesignators,
	1012	true
	1013	)
	1014	))
	1015	);
[549c006]	1016	}
	1017
[ab8c6a6]	1018	void MutexKeyword::addStatements( FunctionDecl* func, CompoundStmt * body, const std::list<DeclarationWithType * > & args ) {
[9243cc91]	1019	ObjectDecl * monitors = new ObjectDecl(
	1020	"__monitors",
[ba3706f]	1021	noStorageClasses,
[9243cc91]	1022	LinkageSpec::Cforall,
	1023	nullptr,
	1024	new ArrayType(
	1025	noQualifiers,
	1026	new PointerType(
	1027	noQualifiers,
	1028	new StructInstType(
	1029	noQualifiers,
	1030	monitor_decl
	1031	)
	1032	),
	1033	new ConstantExpr( Constant::from_ulong( args.size() ) ),
	1034	false,
	1035	false
	1036	),
	1037	new ListInit(
[bd41764]	1038	map_range < std::list<Initializer> > ( args, [](DeclarationWithType var ){
[cb0e6de]	1039	Type * type = var->get_type()->clone();
	1040	type->set_mutex( false );
[9243cc91]	1041	return new SingleInit( new UntypedExpr(
	1042	new NameExpr( "get_monitor" ),
[b81fd95]	1043	{ new CastExpr( new VariableExpr( var ), type, false ) }
[9243cc91]	1044	) );
	1045	})
	1046	)
	1047	);
	1048
[97e3296]	1049	assert(generic_func);
	1050
[2bf7ef6]	1051	// in reverse order :
[97e3296]	1052	// monitor_guard_t __guard = { __monitors, #, func };
[64adb03]	1053	body->push_front(
[ba3706f]	1054	new DeclStmt( new ObjectDecl(
[64adb03]	1055	"__guard",
[ba3706f]	1056	noStorageClasses,
[64adb03]	1057	LinkageSpec::Cforall,
	1058	nullptr,
	1059	new StructInstType(
	1060	noQualifiers,
[ef42b143]	1061	guard_decl
[64adb03]	1062	),
	1063	new ListInit(
	1064	{
[9243cc91]	1065	new SingleInit( new VariableExpr( monitors ) ),
[97e3296]	1066	new SingleInit( new ConstantExpr( Constant::from_ulong( args.size() ) ) ),
[b81fd95]	1067	new SingleInit( new CastExpr( new VariableExpr( func ), generic_func->clone(), false ) )
[ef42b143]	1068	},
	1069	noDesignators,
	1070	true
[64adb03]	1071	)
	1072	))
	1073	);
	1074
[ac2b598]	1075	//$monitor * __monitors[] = { get_monitor(a), get_monitor(b) };
[ba3706f]	1076	body->push_front( new DeclStmt( monitors) );
[64adb03]	1077	}
[bd4d011]	1078
	1079	//=============================================================================================
	1080	// General entry routine
	1081	//=============================================================================================
[549c006]	1082	void ThreadStarter::previsit( StructDecl * decl ) {
[ac2b598]	1083	if( decl->name == "$thread" && decl->body ) {
[549c006]	1084	assert( !thread_decl );
	1085	thread_decl = decl;
	1086	}
	1087	}
	1088
[2065609]	1089	void ThreadStarter::postvisit(FunctionDecl * decl) {
[9f5ecf5]	1090	if( ! CodeGen::isConstructor(decl->name) ) return;
[bd4d011]	1091
[549c006]	1092	Type * typeof_this = InitTweak::getTypeofThis(decl->type);
	1093	StructInstType * ctored_type = dynamic_cast< StructInstType * >( typeof_this );
	1094	if( ctored_type && ctored_type->baseStruct == thread_decl ) {
	1095	thread_ctor_seen = true;
	1096	}
	1097
[bd4d011]	1098	DeclarationWithType * param = decl->get_functionType()->get_parameters().front();
[ce8c12f]	1099	auto type = dynamic_cast< StructInstType * >( InitTweak::getPointerBase( param->get_type() ) );
[bd4d011]	1100	if( type && type->get_baseStruct()->is_thread() ) {
[549c006]	1101	if( !thread_decl \|\| !thread_ctor_seen ) {
[73abe95]	1102	SemanticError( type->get_baseStruct()->location, "thread keyword requires threads to be in scope, add #include <thread.hfa>");
[549c006]	1103	}
	1104
[bd4d011]	1105	addStartStatement( decl, param );
	1106	}
	1107	}
	1108
	1109	void ThreadStarter::addStartStatement( FunctionDecl * decl, DeclarationWithType * param ) {
	1110	CompoundStmt * stmt = decl->get_statements();
	1111
	1112	if( ! stmt ) return;
	1113
[bf2438c]	1114	stmt->push_back(
[bd4d011]	1115	new ExprStmt(
	1116	new UntypedExpr(
	1117	new NameExpr( "__thrd_start" ),
[09f357ec]	1118	{ new VariableExpr( param ), new NameExpr("main") }
[bd4d011]	1119	)
	1120	)
	1121	);
	1122	}
[68fe077a]	1123	};
[6b0b624]	1124
	1125	// Local Variables: //
	1126	// mode: c //
	1127	// tab-width: 4 //
	1128	// End: //
[1c01c58]	1129

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