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source: src/Concurrency/Keywords.cc @ aaf92de

ADTarm-ehast-experimentalenumforall-pointer-decayjacob/cs343-translationnew-ast-unique-exprpthread-emulationqualifiedEnum

Last change on this file since aaf92de was b583113, checked in by Andrew Beach <ajbeach@…>, 3 years ago
Recovered the polymorphic CoroutineCancelled? exception. The interface might need a bit of polish.
Property mode set to `100644`
File size: 36.4 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 {
[ecfd758]	44	inline static std::string getTypeIdName( std::string const & exception_name ) {
	45	return exception_name.empty() ? std::string() : Virtual::typeIdType( exception_name );
	46	}
[1c01c58]	47	inline static std::string getVTableName( std::string const & exception_name ) {
[ecfd758]	48	return exception_name.empty() ? std::string() : Virtual::vtableTypeName( exception_name );
[1c01c58]	49	}
	50
[ab8c6a6]	51	// Only detects threads constructed with the keyword thread.
	52	inline static bool isThread( DeclarationWithType * decl ) {
	53	Type * baseType = decl->get_type()->stripDeclarator();
	54	StructInstType * instType = dynamic_cast<StructInstType *>( baseType );
	55	if ( nullptr == instType ) { return false; }
	56	return instType->baseStruct->is_thread();
	57	}
	58
[64adb03]	59	//=============================================================================================
[2065609]	60	// Pass declarations
[64adb03]	61	//=============================================================================================
	62
[bcda04c]	63	//-----------------------------------------------------------------------------
	64	//Handles sue type declarations :
	65	// sue MyType { struct MyType {
	66	// int data; int data;
	67	// a_struct_t more_data; a_struct_t more_data;
	68	// => NewField_t newField;
	69	// }; };
	70	// static inline NewField_t * getter_name( MyType * this ) { return &this->newField; }
	71	//
[2065609]	72	class ConcurrentSueKeyword : public WithDeclsToAdd {
[bcda04c]	73	public:
	74
[1c01c58]	75	ConcurrentSueKeyword( std::string&& type_name, std::string&& field_name,
	76	std::string&& getter_name, std::string&& context_error, std::string&& exception_name,
	77	bool needs_main, AggregateDecl::Aggregate cast_target ) :
	78	type_name( type_name ), field_name( field_name ), getter_name( getter_name ),
[69c5c00]	79	context_error( context_error ), exception_name( exception_name ),
[ecfd758]	80	typeid_name( getTypeIdName( exception_name ) ),
[69c5c00]	81	vtable_name( getVTableName( exception_name ) ),
[1c01c58]	82	needs_main( needs_main ), cast_target( cast_target ) {}
[bcda04c]	83
	84	virtual ~ConcurrentSueKeyword() {}
	85
[9a705dc8]	86	Declaration * postmutate( StructDecl * decl );
[6c3a5ac1]	87	DeclarationWithType * postmutate( FunctionDecl * decl );
[bcda04c]	88
	89	void handle( StructDecl * );
[ecfd758]	90	void addTypeId( StructDecl * );
[1c01c58]	91	void addVtableForward( StructDecl * );
[bcda04c]	92	FunctionDecl * forwardDeclare( StructDecl * );
	93	ObjectDecl * addField( StructDecl * );
[2f9a722]	94	void addRoutines( ObjectDecl , FunctionDecl );
[bcda04c]	95
	96	virtual bool is_target( StructDecl * decl ) = 0;
	97
[9a705dc8]	98	Expression * postmutate( KeywordCastExpr * cast );
	99
[bcda04c]	100	private:
	101	const std::string type_name;
	102	const std::string field_name;
	103	const std::string getter_name;
	104	const std::string context_error;
[69c5c00]	105	const std::string exception_name;
[ecfd758]	106	const std::string typeid_name;
[1c01c58]	107	const std::string vtable_name;
[bd4d011]	108	bool needs_main;
[312029a]	109	AggregateDecl::Aggregate cast_target;
[bcda04c]	110
[6c3a5ac1]	111	StructDecl * type_decl = nullptr;
	112	FunctionDecl * dtor_decl = nullptr;
[69c5c00]	113	StructDecl * except_decl = nullptr;
[ecfd758]	114	StructDecl * typeid_decl = nullptr;
[1c01c58]	115	StructDecl * vtable_decl = nullptr;
[bcda04c]	116	};
	117
	118
[64adb03]	119	//-----------------------------------------------------------------------------
	120	//Handles thread type declarations :
	121	// thread Mythread { struct MyThread {
	122	// int data; int data;
	123	// a_struct_t more_data; a_struct_t more_data;
[ac2b598]	124	// => $thread __thrd_d;
[64adb03]	125	// }; };
[ac2b598]	126	// static inline $thread * get_thread( MyThread * this ) { return &this->__thrd_d; }
[64adb03]	127	//
[bcda04c]	128	class ThreadKeyword final : public ConcurrentSueKeyword {
[64adb03]	129	public:
	130
[bcda04c]	131	ThreadKeyword() : ConcurrentSueKeyword(
[ac2b598]	132	"$thread",
[bcda04c]	133	"__thrd",
	134	"get_thread",
[6c3a5ac1]	135	"thread keyword requires threads to be in scope, add #include <thread.hfa>\n",
[ab8c6a6]	136	"ThreadCancelled",
[9a705dc8]	137	true,
[312029a]	138	AggregateDecl::Thread
[bcda04c]	139	)
	140	{}
	141
	142	virtual ~ThreadKeyword() {}
	143
	144	virtual bool is_target( StructDecl * decl ) override final { return decl->is_thread(); }
	145
	146	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	147	PassVisitor< ThreadKeyword > impl;
[9a705dc8]	148	mutateAll( translationUnit, impl );
[bcda04c]	149	}
[64adb03]	150	};
	151
	152	//-----------------------------------------------------------------------------
	153	//Handles coroutine type declarations :
	154	// coroutine MyCoroutine { struct MyCoroutine {
	155	// int data; int data;
	156	// a_struct_t more_data; a_struct_t more_data;
[ac2b598]	157	// => $coroutine __cor_d;
[64adb03]	158	// }; };
[ac2b598]	159	// static inline $coroutine * get_coroutine( MyCoroutine * this ) { return &this->__cor_d; }
[64adb03]	160	//
[bcda04c]	161	class CoroutineKeyword final : public ConcurrentSueKeyword {
[64adb03]	162	public:
	163
[bcda04c]	164	CoroutineKeyword() : ConcurrentSueKeyword(
[ac2b598]	165	"$coroutine",
[bcda04c]	166	"__cor",
	167	"get_coroutine",
[6c3a5ac1]	168	"coroutine keyword requires coroutines to be in scope, add #include <coroutine.hfa>\n",
[1c01c58]	169	"CoroutineCancelled",
[9a705dc8]	170	true,
[312029a]	171	AggregateDecl::Coroutine
[bcda04c]	172	)
	173	{}
[b32ada31]	174
[bcda04c]	175	virtual ~CoroutineKeyword() {}
	176
	177	virtual bool is_target( StructDecl * decl ) override final { return decl->is_coroutine(); }
[b32ada31]	178
	179	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	180	PassVisitor< CoroutineKeyword > impl;
[9a705dc8]	181	mutateAll( translationUnit, impl );
[b32ada31]	182	}
[64adb03]	183	};
	184
[427854b]	185
	186
[64adb03]	187	//-----------------------------------------------------------------------------
	188	//Handles monitor type declarations :
	189	// monitor MyMonitor { struct MyMonitor {
	190	// int data; int data;
	191	// a_struct_t more_data; a_struct_t more_data;
[ac2b598]	192	// => $monitor __mon_d;
[64adb03]	193	// }; };
[ac2b598]	194	// static inline $monitor * get_coroutine( MyMonitor * this ) { return &this->__cor_d; }
[64adb03]	195	//
[bcda04c]	196	class MonitorKeyword final : public ConcurrentSueKeyword {
[64adb03]	197	public:
	198
[bcda04c]	199	MonitorKeyword() : ConcurrentSueKeyword(
[ac2b598]	200	"$monitor",
[bcda04c]	201	"__mon",
	202	"get_monitor",
[6c3a5ac1]	203	"monitor keyword requires monitors to be in scope, add #include <monitor.hfa>\n",
[1c01c58]	204	"",
[9a705dc8]	205	false,
[312029a]	206	AggregateDecl::Monitor
[bcda04c]	207	)
	208	{}
	209
	210	virtual ~MonitorKeyword() {}
	211
	212	virtual bool is_target( StructDecl * decl ) override final { return decl->is_monitor(); }
	213
	214	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	215	PassVisitor< MonitorKeyword > impl;
[9a705dc8]	216	mutateAll( translationUnit, impl );
[bcda04c]	217	}
[64adb03]	218	};
	219
[427854b]	220	//-----------------------------------------------------------------------------
	221	//Handles generator type declarations :
	222	// generator MyGenerator { struct MyGenerator {
	223	// int data; int data;
	224	// a_struct_t more_data; a_struct_t more_data;
	225	// => int __gen_next;
	226	// }; };
	227	//
	228	class GeneratorKeyword final : public ConcurrentSueKeyword {
	229	public:
	230
	231	GeneratorKeyword() : ConcurrentSueKeyword(
	232	"$generator",
	233	"__generator_state",
	234	"get_generator",
	235	"Unable to find builtin type $generator\n",
[1c01c58]	236	"",
[427854b]	237	true,
	238	AggregateDecl::Generator
	239	)
	240	{}
	241
	242	virtual ~GeneratorKeyword() {}
	243
	244	virtual bool is_target( StructDecl * decl ) override final { return decl->is_generator(); }
	245
	246	static void implement( std::list< Declaration * > & translationUnit ) {
	247	PassVisitor< GeneratorKeyword > impl;
	248	mutateAll( translationUnit, impl );
	249	}
	250	};
	251
	252
	253	//-----------------------------------------------------------------------------
	254	class SuspendKeyword final : public WithStmtsToAdd, public WithGuards {
	255	public:
	256	SuspendKeyword() = default;
	257	virtual ~SuspendKeyword() = default;
	258
	259	void premutate( FunctionDecl * );
	260	DeclarationWithType * postmutate( FunctionDecl * );
	261
	262	Statement * postmutate( SuspendStmt * );
	263
	264	static void implement( std::list< Declaration * > & translationUnit ) {
	265	PassVisitor< SuspendKeyword > impl;
	266	mutateAll( translationUnit, impl );
	267	}
	268
	269	private:
	270	bool is_real_suspend( FunctionDecl * );
	271
	272	Statement * make_generator_suspend( SuspendStmt * );
	273	Statement * make_coroutine_suspend( SuspendStmt * );
	274
	275	struct LabelPair {
	276	Label obj;
	277	int idx;
	278	};
	279
	280	LabelPair make_label() {
	281	labels.push_back( gen.newLabel("generator") );
	282	return { labels.back(), int(labels.size()) };
	283	}
	284
	285	DeclarationWithType * in_generator = nullptr;
	286	FunctionDecl * decl_suspend = nullptr;
	287	std::vector<Label> labels;
	288	ControlStruct::LabelGenerator & gen = *ControlStruct::LabelGenerator::getGenerator();
	289	};
	290
[64adb03]	291	//-----------------------------------------------------------------------------
	292	//Handles mutex routines definitions :
	293	// void foo( A * mutex a, B * mutex b, int i ) { void foo( A * a, B * b, int i ) {
[ac2b598]	294	// $monitor * __monitors[] = { get_monitor(a), get_monitor(b) };
[64adb03]	295	// monitor_guard_t __guard = { __monitors, 2 };
	296	// /Some code/ => /Some code/
	297	// } }
	298	//
[2065609]	299	class MutexKeyword final {
[64adb03]	300	public:
	301
[2065609]	302	void postvisit( FunctionDecl * decl );
	303	void postvisit( StructDecl * decl );
[64adb03]	304
[db4d8e3]	305	std::list<DeclarationWithType> findMutexArgs( FunctionDecl, bool & first );
[64adb03]	306	void validate( DeclarationWithType * );
[ab8c6a6]	307	void addDtorStatements( FunctionDecl* func, CompoundStmt , const std::list<DeclarationWithType > &);
	308	void addStatements( FunctionDecl* func, CompoundStmt , const std::list<DeclarationWithType > &);
	309	void addThreadDtorStatements( FunctionDecl* func, CompoundStmt * body, const std::list<DeclarationWithType * > & args );
[64adb03]	310
	311	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	312	PassVisitor< MutexKeyword > impl;
[64adb03]	313	acceptAll( translationUnit, impl );
	314	}
[9243cc91]	315
	316	private:
	317	StructDecl* monitor_decl = nullptr;
[ef42b143]	318	StructDecl* guard_decl = nullptr;
[549c006]	319	StructDecl* dtor_guard_decl = nullptr;
[ab8c6a6]	320	StructDecl* thread_guard_decl = nullptr;
[97e3296]	321
	322	static std::unique_ptr< Type > generic_func;
[64adb03]	323	};
	324
[97e3296]	325	std::unique_ptr< Type > MutexKeyword::generic_func = std::unique_ptr< Type >(
	326	new FunctionType(
	327	noQualifiers,
	328	true
	329	)
	330	);
	331
[bd4d011]	332	//-----------------------------------------------------------------------------
	333	//Handles mutex routines definitions :
	334	// void foo( A * mutex a, B * mutex b, int i ) { void foo( A * a, B * b, int i ) {
[ac2b598]	335	// $monitor * __monitors[] = { get_monitor(a), get_monitor(b) };
[bd4d011]	336	// monitor_guard_t __guard = { __monitors, 2 };
	337	// /Some code/ => /Some code/
	338	// } }
	339	//
[2065609]	340	class ThreadStarter final {
[bd4d011]	341	public:
	342
[2065609]	343	void postvisit( FunctionDecl * decl );
[549c006]	344	void previsit ( StructDecl * decl );
[bd4d011]	345
	346	void addStartStatement( FunctionDecl * decl, DeclarationWithType * param );
	347
	348	static void implement( std::list< Declaration * > & translationUnit ) {
[2065609]	349	PassVisitor< ThreadStarter > impl;
[bd4d011]	350	acceptAll( translationUnit, impl );
	351	}
[549c006]	352
	353	private :
	354	bool thread_ctor_seen = false;
	355	StructDecl * thread_decl = nullptr;
[bd4d011]	356	};
	357
[64adb03]	358	//=============================================================================================
	359	// General entry routine
	360	//=============================================================================================
	361	void applyKeywords( std::list< Declaration * > & translationUnit ) {
	362	ThreadKeyword ::implement( translationUnit );
	363	CoroutineKeyword ::implement( translationUnit );
	364	MonitorKeyword ::implement( translationUnit );
[427854b]	365	GeneratorKeyword ::implement( translationUnit );
	366	SuspendKeyword ::implement( translationUnit );
[bcda04c]	367	}
	368
	369	void implementMutexFuncs( std::list< Declaration * > & translationUnit ) {
[64adb03]	370	MutexKeyword ::implement( translationUnit );
	371	}
	372
[bcda04c]	373	void implementThreadStarter( std::list< Declaration * > & translationUnit ) {
[bd4d011]	374	ThreadStarter ::implement( translationUnit );
[bcda04c]	375	}
	376
[b32ada31]	377	//=============================================================================================
[bcda04c]	378	// Generic keyword implementation
[b32ada31]	379	//=============================================================================================
[2db79e5]	380	void fixupGenerics(FunctionType * func, StructDecl * decl) {
	381	cloneAll(decl->parameters, func->forall);
	382	for ( TypeDecl * td : func->forall ) {
	383	strict_dynamic_cast<StructInstType*>(
	384	func->parameters.front()->get_type()->stripReferences()
	385	)->parameters.push_back(
	386	new TypeExpr( new TypeInstType( noQualifiers, td->name, td ) )
	387	);
	388	}
	389	}
	390
[9a705dc8]	391	Declaration * ConcurrentSueKeyword::postmutate(StructDecl * decl) {
[9f5ecf5]	392	if( decl->name == type_name && decl->body ) {
[bcda04c]	393	assert( !type_decl );
	394	type_decl = decl;
[b32ada31]	395	}
[bcda04c]	396	else if ( is_target(decl) ) {
[b32ada31]	397	handle( decl );
	398	}
[69c5c00]	399	else if ( !except_decl && exception_name == decl->name && decl->body ) {
	400	except_decl = decl;
	401	}
[ecfd758]	402	else if ( !typeid_decl && typeid_name == decl->name && decl->body ) {
	403	typeid_decl = decl;
	404	}
[1c01c58]	405	else if ( !vtable_decl && vtable_name == decl->name && decl->body ) {
	406	vtable_decl = decl;
	407	}
	408	// Might be able to get ride of is target.
	409	assert( is_target(decl) == (cast_target == decl->kind) );
[9a705dc8]	410	return decl;
[b32ada31]	411	}
	412
[6c3a5ac1]	413	DeclarationWithType * ConcurrentSueKeyword::postmutate( FunctionDecl * decl ) {
[1c01c58]	414	if ( type_decl && isDestructorFor( decl, type_decl ) )
	415	dtor_decl = decl;
[b583113]	416	else if ( vtable_name.empty() \|\| !decl->has_body() )
[43cedfb1]	417	;
[1c01c58]	418	else if ( auto param = isMainFor( decl, cast_target ) ) {
	419	// This should never trigger.
	420	assert( vtable_decl );
	421	// Should be safe because of isMainFor.
	422	StructInstType * struct_type = static_cast<StructInstType *>(
	423	static_cast<ReferenceType *>( param->get_type() )->base );
	424	assert( struct_type );
	425
[69c5c00]	426	std::list< Expression * > poly_args = { new TypeExpr( struct_type->clone() ) };
	427	ObjectDecl * vtable_object = Virtual::makeVtableInstance(
[b583113]	428	"_default_vtable_object_declaration",
[69c5c00]	429	vtable_decl->makeInst( poly_args ), struct_type, nullptr );
	430	declsToAddAfter.push_back( vtable_object );
[b583113]	431	declsToAddAfter.push_back(
	432	new ObjectDecl(
	433	Virtual::concurrentDefaultVTableName(),
	434	Type::Const,
	435	LinkageSpec::Cforall,
	436	/* bitfieldWidth */ nullptr,
	437	new ReferenceType( Type::Const, vtable_object->type->clone() ),
	438	new SingleInit( new VariableExpr( vtable_object ) )
	439	)
	440	);
[69c5c00]	441	declsToAddAfter.push_back( Virtual::makeGetExceptionFunction(
	442	vtable_object, except_decl->makeInst( std::move( poly_args ) )
	443	) );
[1c01c58]	444	}
[6c3a5ac1]	445
	446	return decl;
	447	}
	448
[9a705dc8]	449	Expression * ConcurrentSueKeyword::postmutate( KeywordCastExpr * cast ) {
	450	if ( cast_target == cast->target ) {
[ac2b598]	451	// convert (thread &)t to ($thread &)*get_thread(t), etc.
[9a705dc8]	452	if( !type_decl ) SemanticError( cast, context_error );
[6c3a5ac1]	453	if( !dtor_decl ) SemanticError( cast, context_error );
[3b0c8cb]	454	assert( cast->result == nullptr );
	455	cast->set_result( new ReferenceType( noQualifiers, new StructInstType( noQualifiers, type_decl ) ) );
	456	cast->concrete_target.field = field_name;
	457	cast->concrete_target.getter = getter_name;
[9a705dc8]	458	}
	459	return cast;
	460	}
	461
	462
[bcda04c]	463	void ConcurrentSueKeyword::handle( StructDecl * decl ) {
[9f5ecf5]	464	if( ! decl->body ) return;
[b32ada31]	465
[a16764a6]	466	if( !type_decl ) SemanticError( decl, context_error );
[6c3a5ac1]	467	if( !dtor_decl ) SemanticError( decl, context_error );
[b32ada31]	468
[ecfd758]	469	if ( !exception_name.empty() ) {
	470	if( !typeid_decl ) SemanticError( decl, context_error );
	471	if( !vtable_decl ) SemanticError( decl, context_error );
	472
	473	addTypeId( decl );
	474	addVtableForward( decl );
	475	}
[bcda04c]	476	FunctionDecl * func = forwardDeclare( decl );
	477	ObjectDecl * field = addField( decl );
[2f9a722]	478	addRoutines( field, func );
[b32ada31]	479	}
	480
[ecfd758]	481	void ConcurrentSueKeyword::addTypeId( StructDecl * decl ) {
	482	assert( typeid_decl );
	483	StructInstType typeid_type( Type::Const, typeid_decl );
	484	typeid_type.parameters.push_back( new TypeExpr(
	485	new StructInstType( noQualifiers, decl )
[69c5c00]	486	) );
[ecfd758]	487	declsToAddBefore.push_back( Virtual::makeTypeIdInstance( &typeid_type ) );
	488	}
	489
	490	void ConcurrentSueKeyword::addVtableForward( StructDecl * decl ) {
	491	assert( vtable_decl );
	492	std::list< Expression * > poly_args = {
	493	new TypeExpr( new StructInstType( noQualifiers, decl ) ),
	494	};
	495	declsToAddBefore.push_back( Virtual::makeGetExceptionForward(
	496	vtable_decl->makeInst( poly_args ),
	497	except_decl->makeInst( poly_args )
	498	) );
[b583113]	499	ObjectDecl * vtable_object = Virtual::makeVtableForward(
	500	"_default_vtable_object_declaration",
	501	vtable_decl->makeInst( move( poly_args ) ) );
	502	declsToAddBefore.push_back( vtable_object );
	503	declsToAddAfter.push_back(
	504	new ObjectDecl(
	505	Virtual::concurrentDefaultVTableName(),
	506	Type::Const,
	507	LinkageSpec::Cforall,
	508	/* bitfieldWidth */ nullptr,
	509	new ReferenceType( Type::Const, vtable_object->type->clone() ),
	510	/* init */ nullptr
	511	)
	512	);
[1c01c58]	513	}
	514
[bcda04c]	515	FunctionDecl * ConcurrentSueKeyword::forwardDeclare( StructDecl * decl ) {
	516
	517	StructDecl * forward = decl->clone();
	518	forward->set_body( false );
	519	deleteAll( forward->get_members() );
	520	forward->get_members().clear();
	521
[bd4d011]	522	FunctionType * get_type = new FunctionType( noQualifiers, false );
[bcda04c]	523	ObjectDecl * this_decl = new ObjectDecl(
	524	"this",
[ba3706f]	525	noStorageClasses,
[b32ada31]	526	LinkageSpec::Cforall,
	527	nullptr,
[83a071f9]	528	new ReferenceType(
[b32ada31]	529	noQualifiers,
[bcda04c]	530	new StructInstType(
	531	noQualifiers,
	532	decl
	533	)
[b32ada31]	534	),
	535	nullptr
	536	);
	537
[2db79e5]	538	get_type->get_parameters().push_back( this_decl->clone() );
[bd4d011]	539	get_type->get_returnVals().push_back(
[e04b636]	540	new ObjectDecl(
	541	"ret",
[ba3706f]	542	noStorageClasses,
[e04b636]	543	LinkageSpec::Cforall,
	544	nullptr,
	545	new PointerType(
	546	noQualifiers,
	547	new StructInstType(
	548	noQualifiers,
[bcda04c]	549	type_decl
[e04b636]	550	)
	551	),
	552	nullptr
	553	)
	554	);
[2db79e5]	555	fixupGenerics(get_type, decl);
[b32ada31]	556
[bcda04c]	557	FunctionDecl * get_decl = new FunctionDecl(
	558	getter_name,
	559	Type::Static,
	560	LinkageSpec::Cforall,
[bd4d011]	561	get_type,
[bcda04c]	562	nullptr,
[a8078ee]	563	{ new Attribute("const") },
[bcda04c]	564	Type::Inline
	565	);
	566
[bd4d011]	567	FunctionDecl * main_decl = nullptr;
	568
	569	if( needs_main ) {
	570	FunctionType * main_type = new FunctionType( noQualifiers, false );
[bf2438c]	571
[bd4d011]	572	main_type->get_parameters().push_back( this_decl->clone() );
	573
	574	main_decl = new FunctionDecl(
	575	"main",
[ba3706f]	576	noStorageClasses,
[bd4d011]	577	LinkageSpec::Cforall,
	578	main_type,
	579	nullptr
	580	);
[2db79e5]	581	fixupGenerics(main_type, decl);
[bd4d011]	582	}
	583
[2db79e5]	584	delete this_decl;
	585
[2065609]	586	declsToAddBefore.push_back( forward );
	587	if( needs_main ) declsToAddBefore.push_back( main_decl );
	588	declsToAddBefore.push_back( get_decl );
[bcda04c]	589
	590	return get_decl;
	591	}
	592
	593	ObjectDecl * ConcurrentSueKeyword::addField( StructDecl * decl ) {
	594	ObjectDecl * field = new ObjectDecl(
	595	field_name,
[ba3706f]	596	noStorageClasses,
[bcda04c]	597	LinkageSpec::Cforall,
	598	nullptr,
	599	new StructInstType(
	600	noQualifiers,
	601	type_decl
	602	),
	603	nullptr
	604	);
	605
	606	decl->get_members().push_back( field );
	607
	608	return field;
	609	}
	610
[2f9a722]	611	void ConcurrentSueKeyword::addRoutines( ObjectDecl * field, FunctionDecl * func ) {
[ba3706f]	612	CompoundStmt * statement = new CompoundStmt();
[bf2438c]	613	statement->push_back(
[b32ada31]	614	new ReturnStmt(
[e04b636]	615	new AddressExpr(
[bcda04c]	616	new MemberExpr(
	617	field,
[2db79e5]	618	new CastExpr(
	619	new VariableExpr( func->get_functionType()->get_parameters().front() ),
[b81fd95]	620	func->get_functionType()->get_parameters().front()->get_type()->stripReferences()->clone(),
	621	false
[2db79e5]	622	)
[e04b636]	623	)
[b32ada31]	624	)
	625	)
	626	);
	627
[bcda04c]	628	FunctionDecl * get_decl = func->clone();
	629
	630	get_decl->set_statements( statement );
[e04b636]	631
	632	declsToAddAfter.push_back( get_decl );
[427854b]	633	}
	634
	635	//=============================================================================================
	636	// Suspend keyword implementation
	637	//=============================================================================================
	638	bool SuspendKeyword::is_real_suspend( FunctionDecl * func ) {
	639	if(isMangled(func->linkage)) return false; // the real suspend isn't mangled
	640	if(func->name != "__cfactx_suspend") return false; // the real suspend has a specific name
	641	if(func->type->parameters.size() != 0) return false; // Too many parameters
	642	if(func->type->returnVals.size() != 0) return false; // Too many return values
	643
	644	return true;
[b32ada31]	645	}
	646
[427854b]	647	void SuspendKeyword::premutate( FunctionDecl * func ) {
	648	GuardValue(in_generator);
	649	in_generator = nullptr;
	650
	651	// Is this the real suspend?
	652	if(is_real_suspend(func)) {
	653	decl_suspend = decl_suspend ? decl_suspend : func;
	654	return;
	655	}
	656
	657	// Is this the main of a generator?
[1c01c58]	658	auto param = isMainFor( func, AggregateDecl::Aggregate::Generator );
[427854b]	659	if(!param) return;
	660
	661	if(func->type->returnVals.size() != 0) SemanticError(func->location, "Generator main must return void");
	662
	663	in_generator = param;
	664	GuardValue(labels);
	665	labels.clear();
	666	}
	667
	668	DeclarationWithType * SuspendKeyword::postmutate( FunctionDecl * func ) {
	669	if( !func->statements ) return func; // Not the actual definition, don't do anything
	670	if( !in_generator ) return func; // Not in a generator, don't do anything
	671	if( labels.empty() ) return func; // Generator has no states, nothing to do, could throw a warning
	672
	673	// This is a generator main, we need to add the following code to the top
	674	// static void * __generator_labels[] = {&&s0, &&s1, ...};
	675	// goto * __generator_labels[gen.__generator_state];
	676	const auto & loc = func->location;
	677
	678	const auto first_label = gen.newLabel("generator");
	679
	680	// for each label add to declaration
	681	std::list<Initializer*> inits = { new SingleInit( new LabelAddressExpr( first_label ) ) };
	682	for(const auto & label : labels) {
	683	inits.push_back(
	684	new SingleInit(
	685	new LabelAddressExpr( label )
	686	)
	687	);
	688	}
	689	auto init = new ListInit(std::move(inits), noDesignators, true);
	690	labels.clear();
	691
	692	// create decl
	693	auto decl = new ObjectDecl(
	694	"__generator_labels",
	695	Type::StorageClasses( Type::Static ),
	696	LinkageSpec::AutoGen,
	697	nullptr,
	698	new ArrayType(
	699	Type::Qualifiers(),
	700	new PointerType(
	701	Type::Qualifiers(),
	702	new VoidType( Type::Qualifiers() )
	703	),
	704	nullptr,
	705	false, false
	706	),
	707	init
	708	);
	709
	710	// create the goto
	711	assert(in_generator);
	712
	713	auto go_decl = new ObjectDecl(
	714	"__generator_label",
	715	noStorageClasses,
	716	LinkageSpec::AutoGen,
	717	nullptr,
	718	new PointerType(
	719	Type::Qualifiers(),
	720	new VoidType( Type::Qualifiers() )
	721	),
	722	new SingleInit(
	723	new UntypedExpr(
	724	new NameExpr("?[?]"),
	725	{
	726	new NameExpr("__generator_labels"),
	727	new UntypedMemberExpr(
	728	new NameExpr("__generator_state"),
	729	new VariableExpr( in_generator )
	730	)
	731	}
	732	)
	733	)
	734	);
	735	go_decl->location = loc;
	736
	737	auto go = new BranchStmt(
	738	new VariableExpr( go_decl ),
	739	BranchStmt::Goto
	740	);
	741	go->location = loc;
	742	go->computedTarget->location = loc;
	743
	744	auto noop = new NullStmt({ first_label });
	745	noop->location = loc;
	746
	747	// wrap everything in a nice compound
	748	auto body = new CompoundStmt({
	749	new DeclStmt( decl ),
	750	new DeclStmt( go_decl ),
	751	go,
	752	noop,
	753	func->statements
	754	});
	755	body->location = loc;
	756	func->statements = body;
	757
	758	return func;
	759	}
	760
	761	Statement * SuspendKeyword::postmutate( SuspendStmt * stmt ) {
	762	SuspendStmt::Type type = stmt->type;
	763	if(type == SuspendStmt::None) {
	764	// This suspend has a implicit target, find it
	765	type = in_generator ? SuspendStmt::Generator : SuspendStmt::Coroutine;
	766	}
	767
	768	// Check that the target makes sense
	769	if(!in_generator && type == SuspendStmt::Generator) SemanticError( stmt->location, "'suspend generator' must be used inside main of generator type.");
	770
	771	// Act appropriately
	772	switch(type) {
	773	case SuspendStmt::Generator: return make_generator_suspend(stmt);
	774	case SuspendStmt::Coroutine: return make_coroutine_suspend(stmt);
	775	default: abort();
	776	}
	777	}
	778
	779	Statement * SuspendKeyword::make_generator_suspend( SuspendStmt * stmt ) {
	780	assert(in_generator);
	781	// Target code is :
	782	// gen.__generator_state = X;
	783	// { THEN }
	784	// return;
	785	// __gen_X:;
	786
	787	// Save the location and delete the old statement, we only need the location from this point on
	788	auto loc = stmt->location;
	789
	790	// Build the label and get its index
	791	auto label = make_label();
	792
	793	// Create the context saving statement
	794	auto save = new ExprStmt( new UntypedExpr(
	795	new NameExpr( "?=?" ),
	796	{
	797	new UntypedMemberExpr(
	798	new NameExpr("__generator_state"),
	799	new VariableExpr( in_generator )
	800	),
	801	new ConstantExpr(
	802	Constant::from_int( label.idx )
	803	)
	804	}
	805	));
	806	assert(save->expr);
	807	save->location = loc;
	808	stmtsToAddBefore.push_back( save );
	809
	810	// if we have a then add it here
	811	auto then = stmt->then;
	812	stmt->then = nullptr;
	813	delete stmt;
	814	if(then) stmtsToAddBefore.push_back( then );
	815
	816	// Create the return statement
	817	auto ret = new ReturnStmt( nullptr );
	818	ret->location = loc;
	819	stmtsToAddBefore.push_back( ret );
	820
	821	// Create the null statement with the created label
	822	auto noop = new NullStmt({ label.obj });
	823	noop->location = loc;
	824
	825	// Return the null statement to take the place of the previous statement
	826	return noop;
	827	}
	828
	829	Statement * SuspendKeyword::make_coroutine_suspend( SuspendStmt * stmt ) {
	830	if(stmt->then) SemanticError( stmt->location, "Compound statement following coroutines is not implemented.");
	831
	832	// Save the location and delete the old statement, we only need the location from this point on
	833	auto loc = stmt->location;
	834	delete stmt;
	835
	836	// Create the call expression
	837	if(!decl_suspend) SemanticError( loc, "suspend keyword applied to coroutines requires coroutines to be in scope, add #include <coroutine.hfa>\n");
	838	auto expr = new UntypedExpr( VariableExpr::functionPointer( decl_suspend ) );
[e6cfa8ff]	839	expr->location = loc;
[427854b]	840
	841	// Change this statement into a regular expr
	842	assert(expr);
	843	auto nstmt = new ExprStmt( expr );
[e6cfa8ff]	844	nstmt->location = loc;
[427854b]	845	return nstmt;
	846	}
	847
	848
[64adb03]	849	//=============================================================================================
	850	// Mutex keyword implementation
	851	//=============================================================================================
[97e3296]	852
[2065609]	853	void MutexKeyword::postvisit(FunctionDecl* decl) {
[102a58b]	854
[db4d8e3]	855	bool first = false;
	856	std::list<DeclarationWithType*> mutexArgs = findMutexArgs( decl, first );
[ab8c6a6]	857	bool const isDtor = CodeGen::isDestructor( decl->name );
[64adb03]	858
[ceedde6]	859	// Is this function relevant to monitors
	860	if( mutexArgs.empty() ) {
	861	// If this is the destructor for a monitor it must be mutex
	862	if(isDtor) {
	863	Type* ty = decl->get_functionType()->get_parameters().front()->get_type();
	864
	865	// If it's a copy, it's not a mutex
	866	ReferenceType* rty = dynamic_cast< ReferenceType * >( ty );
	867	if( ! rty ) return;
	868
	869	// If we are not pointing directly to a type, it's not a mutex
	870	Type* base = rty->get_base();
	871	if( dynamic_cast< ReferenceType * >( base ) ) return;
	872	if( dynamic_cast< PointerType * >( base ) ) return;
	873
	874	// Check if its a struct
	875	StructInstType * baseStruct = dynamic_cast< StructInstType * >( base );
	876	if( !baseStruct ) return;
	877
	878	// Check if its a monitor
	879	if(baseStruct->baseStruct->is_monitor() \|\| baseStruct->baseStruct->is_thread())
	880	SemanticError( decl, "destructors for structures declared as \"monitor\" must use mutex parameters\n" );
	881	}
	882	return;
	883	}
[549c006]	884
[ceedde6]	885	// Monitors can't be constructed with mutual exclusion
	886	if( CodeGen::isConstructor(decl->name) && !first ) SemanticError( decl, "constructors cannot have mutex parameters" );
[549c006]	887
[ceedde6]	888	// It makes no sense to have multiple mutex parameters for the destructor
[a16764a6]	889	if( isDtor && mutexArgs.size() != 1 ) SemanticError( decl, "destructors can only have 1 mutex argument" );
[549c006]	890
[ceedde6]	891	// Make sure all the mutex arguments are monitors
[64adb03]	892	for(auto arg : mutexArgs) {
	893	validate( arg );
	894	}
	895
[ceedde6]	896	// Check if we need to instrument the body
[64adb03]	897	CompoundStmt* body = decl->get_statements();
	898	if( ! body ) return;
	899
[ceedde6]	900	// Do we have the required headers
[a16764a6]	901	if( !monitor_decl \|\| !guard_decl \|\| !dtor_guard_decl )
[73abe95]	902	SemanticError( decl, "mutex keyword requires monitors to be in scope, add #include <monitor.hfa>\n" );
[b32ada31]	903
[ceedde6]	904	// Instrument the body
[ab8c6a6]	905	if ( isDtor && isThread( mutexArgs.front() ) ) {
	906	if( !thread_guard_decl ) {
	907	SemanticError( decl, "thread destructor requires threads to be in scope, add #include <thread.hfa>\n" );
	908	}
	909	addThreadDtorStatements( decl, body, mutexArgs );
	910	}
	911	else if ( isDtor ) {
	912	addDtorStatements( decl, body, mutexArgs );
[549c006]	913	}
	914	else {
[ab8c6a6]	915	addStatements( decl, body, mutexArgs );
[549c006]	916	}
[64adb03]	917	}
	918
[2065609]	919	void MutexKeyword::postvisit(StructDecl* decl) {
[102a58b]	920
[ac2b598]	921	if( decl->name == "$monitor" && decl->body ) {
[9243cc91]	922	assert( !monitor_decl );
	923	monitor_decl = decl;
	924	}
[88d955f]	925	else if( decl->name == "monitor_guard_t" && decl->body ) {
[ef42b143]	926	assert( !guard_decl );
	927	guard_decl = decl;
	928	}
[88d955f]	929	else if( decl->name == "monitor_dtor_guard_t" && decl->body ) {
[549c006]	930	assert( !dtor_guard_decl );
	931	dtor_guard_decl = decl;
	932	}
[ab8c6a6]	933	else if( decl->name == "thread_dtor_guard_t" && decl->body ) {
	934	assert( !thread_guard_decl );
	935	thread_guard_decl = decl;
	936	}
[9243cc91]	937	}
	938
[db4d8e3]	939	std::list<DeclarationWithType> MutexKeyword::findMutexArgs( FunctionDecl decl, bool & first ) {
[64adb03]	940	std::list<DeclarationWithType*> mutexArgs;
	941
[db4d8e3]	942	bool once = true;
[64adb03]	943	for( auto arg : decl->get_functionType()->get_parameters()) {
	944	//Find mutex arguments
	945	Type* ty = arg->get_type();
[615a096]	946	if( ! ty->get_mutex() ) continue;
[64adb03]	947
[db4d8e3]	948	if(once) {first = true;}
	949	once = false;
	950
[64adb03]	951	//Append it to the list
	952	mutexArgs.push_back( arg );
	953	}
	954
	955	return mutexArgs;
	956	}
	957
	958	void MutexKeyword::validate( DeclarationWithType * arg ) {
	959	Type* ty = arg->get_type();
	960
	961	//Makes sure it's not a copy
[870d1f0]	962	ReferenceType* rty = dynamic_cast< ReferenceType * >( ty );
[a16764a6]	963	if( ! rty ) SemanticError( arg, "Mutex argument must be of reference type " );
[64adb03]	964
	965	//Make sure the we are pointing directly to a type
[83a071f9]	966	Type* base = rty->get_base();
[a16764a6]	967	if( dynamic_cast< ReferenceType * >( base ) ) SemanticError( arg, "Mutex argument have exactly one level of indirection " );
	968	if( dynamic_cast< PointerType * >( base ) ) SemanticError( arg, "Mutex argument have exactly one level of indirection " );
[64adb03]	969
	970	//Make sure that typed isn't mutex
[a16764a6]	971	if( base->get_mutex() ) SemanticError( arg, "mutex keyword may only appear once per argument " );
[64adb03]	972	}
	973
[ab8c6a6]	974	void MutexKeyword::addDtorStatements( FunctionDecl* func, CompoundStmt * body, const std::list<DeclarationWithType * > & args ) {
[549c006]	975	Type * arg_type = args.front()->get_type()->clone();
	976	arg_type->set_mutex( false );
	977
	978	ObjectDecl * monitors = new ObjectDecl(
	979	"__monitor",
[ba3706f]	980	noStorageClasses,
[549c006]	981	LinkageSpec::Cforall,
	982	nullptr,
	983	new PointerType(
	984	noQualifiers,
	985	new StructInstType(
	986	noQualifiers,
	987	monitor_decl
	988	)
	989	),
	990	new SingleInit( new UntypedExpr(
	991	new NameExpr( "get_monitor" ),
[b81fd95]	992	{ new CastExpr( new VariableExpr( args.front() ), arg_type, false ) }
[549c006]	993	))
	994	);
	995
	996	assert(generic_func);
	997
	998	//in reverse order :
[2bf7ef6]	999	// monitor_dtor_guard_t __guard = { __monitors, func };
[549c006]	1000	body->push_front(
[ba3706f]	1001	new DeclStmt( new ObjectDecl(
[549c006]	1002	"__guard",
[ba3706f]	1003	noStorageClasses,
[549c006]	1004	LinkageSpec::Cforall,
	1005	nullptr,
	1006	new StructInstType(
	1007	noQualifiers,
	1008	dtor_guard_decl
	1009	),
	1010	new ListInit(
	1011	{
	1012	new SingleInit( new AddressExpr( new VariableExpr( monitors ) ) ),
[77a2994]	1013	new SingleInit( new CastExpr( new VariableExpr( func ), generic_func->clone(), false ) ),
	1014	new SingleInit( new ConstantExpr( Constant::from_bool( false ) ) )
[549c006]	1015	},
	1016	noDesignators,
	1017	true
	1018	)
	1019	))
	1020	);
	1021
[ac2b598]	1022	//$monitor * __monitors[] = { get_monitor(a), get_monitor(b) };
[ab8c6a6]	1023	body->push_front( new DeclStmt( monitors ) );
	1024	}
	1025
	1026	void MutexKeyword::addThreadDtorStatements(
	1027	FunctionDecl, CompoundStmt body,
	1028	const std::list<DeclarationWithType * > & args ) {
	1029	assert( args.size() == 1 );
	1030	DeclarationWithType * arg = args.front();
	1031	Type * arg_type = arg->get_type()->clone();
	1032	assert( arg_type->get_mutex() );
	1033	arg_type->set_mutex( false );
	1034
	1035	// thread_dtor_guard_t __guard = { this, intptr( 0 ) };
	1036	body->push_front(
	1037	new DeclStmt( new ObjectDecl(
	1038	"__guard",
	1039	noStorageClasses,
	1040	LinkageSpec::Cforall,
	1041	nullptr,
	1042	new StructInstType(
	1043	noQualifiers,
	1044	thread_guard_decl
	1045	),
	1046	new ListInit(
	1047	{
	1048	new SingleInit( new CastExpr( new VariableExpr( arg ), arg_type ) ),
	1049	new SingleInit( new UntypedExpr(
	1050	new NameExpr( "intptr" ), {
	1051	new ConstantExpr( Constant::from_int( 0 ) ),
	1052	}
	1053	) ),
	1054	},
	1055	noDesignators,
	1056	true
	1057	)
	1058	))
	1059	);
[549c006]	1060	}
	1061
[ab8c6a6]	1062	void MutexKeyword::addStatements( FunctionDecl* func, CompoundStmt * body, const std::list<DeclarationWithType * > & args ) {
[9243cc91]	1063	ObjectDecl * monitors = new ObjectDecl(
	1064	"__monitors",
[ba3706f]	1065	noStorageClasses,
[9243cc91]	1066	LinkageSpec::Cforall,
	1067	nullptr,
	1068	new ArrayType(
	1069	noQualifiers,
	1070	new PointerType(
	1071	noQualifiers,
	1072	new StructInstType(
	1073	noQualifiers,
	1074	monitor_decl
	1075	)
	1076	),
	1077	new ConstantExpr( Constant::from_ulong( args.size() ) ),
	1078	false,
	1079	false
	1080	),
	1081	new ListInit(
[bd41764]	1082	map_range < std::list<Initializer> > ( args, [](DeclarationWithType var ){
[cb0e6de]	1083	Type * type = var->get_type()->clone();
	1084	type->set_mutex( false );
[9243cc91]	1085	return new SingleInit( new UntypedExpr(
	1086	new NameExpr( "get_monitor" ),
[b81fd95]	1087	{ new CastExpr( new VariableExpr( var ), type, false ) }
[9243cc91]	1088	) );
	1089	})
	1090	)
	1091	);
	1092
[97e3296]	1093	assert(generic_func);
	1094
[2bf7ef6]	1095	// in reverse order :
[97e3296]	1096	// monitor_guard_t __guard = { __monitors, #, func };
[64adb03]	1097	body->push_front(
[ba3706f]	1098	new DeclStmt( new ObjectDecl(
[64adb03]	1099	"__guard",
[ba3706f]	1100	noStorageClasses,
[64adb03]	1101	LinkageSpec::Cforall,
	1102	nullptr,
	1103	new StructInstType(
	1104	noQualifiers,
[ef42b143]	1105	guard_decl
[64adb03]	1106	),
	1107	new ListInit(
	1108	{
[9243cc91]	1109	new SingleInit( new VariableExpr( monitors ) ),
[97e3296]	1110	new SingleInit( new ConstantExpr( Constant::from_ulong( args.size() ) ) ),
[b81fd95]	1111	new SingleInit( new CastExpr( new VariableExpr( func ), generic_func->clone(), false ) )
[ef42b143]	1112	},
	1113	noDesignators,
	1114	true
[64adb03]	1115	)
	1116	))
	1117	);
	1118
[ac2b598]	1119	//$monitor * __monitors[] = { get_monitor(a), get_monitor(b) };
[ba3706f]	1120	body->push_front( new DeclStmt( monitors) );
[64adb03]	1121	}
[bd4d011]	1122
	1123	//=============================================================================================
	1124	// General entry routine
	1125	//=============================================================================================
[549c006]	1126	void ThreadStarter::previsit( StructDecl * decl ) {
[ac2b598]	1127	if( decl->name == "$thread" && decl->body ) {
[549c006]	1128	assert( !thread_decl );
	1129	thread_decl = decl;
	1130	}
	1131	}
	1132
[2065609]	1133	void ThreadStarter::postvisit(FunctionDecl * decl) {
[9f5ecf5]	1134	if( ! CodeGen::isConstructor(decl->name) ) return;
[bd4d011]	1135
[549c006]	1136	Type * typeof_this = InitTweak::getTypeofThis(decl->type);
	1137	StructInstType * ctored_type = dynamic_cast< StructInstType * >( typeof_this );
	1138	if( ctored_type && ctored_type->baseStruct == thread_decl ) {
	1139	thread_ctor_seen = true;
	1140	}
	1141
[bd4d011]	1142	DeclarationWithType * param = decl->get_functionType()->get_parameters().front();
[ce8c12f]	1143	auto type = dynamic_cast< StructInstType * >( InitTweak::getPointerBase( param->get_type() ) );
[bd4d011]	1144	if( type && type->get_baseStruct()->is_thread() ) {
[549c006]	1145	if( !thread_decl \|\| !thread_ctor_seen ) {
[73abe95]	1146	SemanticError( type->get_baseStruct()->location, "thread keyword requires threads to be in scope, add #include <thread.hfa>");
[549c006]	1147	}
	1148
[bd4d011]	1149	addStartStatement( decl, param );
	1150	}
	1151	}
	1152
	1153	void ThreadStarter::addStartStatement( FunctionDecl * decl, DeclarationWithType * param ) {
	1154	CompoundStmt * stmt = decl->get_statements();
	1155
	1156	if( ! stmt ) return;
	1157
[bf2438c]	1158	stmt->push_back(
[bd4d011]	1159	new ExprStmt(
	1160	new UntypedExpr(
	1161	new NameExpr( "__thrd_start" ),
[09f357ec]	1162	{ new VariableExpr( param ), new NameExpr("main") }
[bd4d011]	1163	)
	1164	)
	1165	);
	1166	}
[68fe077a]	1167	};
[6b0b624]	1168
	1169	// Local Variables: //
	1170	// mode: c //
	1171	// tab-width: 4 //
	1172	// End: //
[1c01c58]	1173

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