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source: src/Concurrency/Waitfor.cc @ 2f98fb2

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

Last change on this file since 2f98fb2 was e15853c, checked in by Peter A. Buhr <pabuhr@…>, 6 years ago
remove leading underscores in enums for _FloatNN and _Bool
Property mode set to `100644`
File size: 15.3 KB

Rev	Line
[9f5ecf5]	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	// Waitfor.cc --
	8	//
	9	// Author : Thierry Delisle
	10	// Created On : Mon Aug 28 11:06:52 2017
	11	// Last Modified By :
	12	// Last Modified On :
[e15853c]	13	// Update Count : 7
[9f5ecf5]	14	//
	15
	16	#include "Concurrency/Keywords.h"
	17
	18	#include <cassert> // for assert
	19	#include <string> // for string, operator==
	20
	21	using namespace std::string_literals;
	22
	23	#include "Common/PassVisitor.h" // for PassVisitor
	24	#include "Common/SemanticError.h" // for SemanticError
	25	#include "Common/utility.h" // for deleteAll, map_range
	26	#include "CodeGen/OperatorTable.h" // for isConstructor
	27	#include "InitTweak/InitTweak.h" // for getPointerBase
	28	#include "Parser/LinkageSpec.h" // for Cforall
[1dcd9554]	29	#include "ResolvExpr/Resolver.h" // for findVoidExpression
[9f5ecf5]	30	#include "SynTree/Constant.h" // for Constant
	31	#include "SynTree/Declaration.h" // for StructDecl, FunctionDecl, ObjectDecl
	32	#include "SynTree/Expression.h" // for VariableExpr, ConstantExpr, Untype...
	33	#include "SynTree/Initializer.h" // for SingleInit, ListInit, Initializer ...
	34	#include "SynTree/Label.h" // for Label
	35	#include "SynTree/Statement.h" // for CompoundStmt, DeclStmt, ExprStmt
	36	#include "SynTree/Type.h" // for StructInstType, Type, PointerType
	37	#include "SynTree/Visitor.h" // for Visitor, acceptAll
	38
	39	class Attribute;
	40	/*
	41	void foo() {
	42	while( true ) {
	43	when( a < 1 ) waitfor( f, a ) { bar(); }
	44	or timeout( swagl() );
	45	or waitfor( g, a ) { baz(); }
	46	or waitfor( ^?{}, a ) { break; }
	47	or waitfor( ^?{} ) { break; }
	48	}
	49	}
	50
	51	void f(int i, float f, A & mutex b, struct foo * );
	52	void f(int );
	53
	54
	55	\| \|
	56	\| \|
	57	\| \|
	58	\| \|
	59	\| \|
	60	\ \| \| /
	61	\ /
	62	\ /
	63	\/
	64
	65
	66	void foo() {
	67	while( true ) {
[42506e1]	68	{
	69	acceptable_t acceptables[3];
	70	if( a < 1 ) {
	71	acceptables[0].func = f;
	72	acceptables[0].mon = a;
	73	}
	74	acceptables[1].func = g;
	75	acceptables[1].mon = a;
[9f5ecf5]	76
[42506e1]	77	acceptables[2].func = f;
	78	acceptables[2].mon = a;
	79	acceptables[2].is_dtor = true;
[9f5ecf5]	80
[42506e1]	81	int ret = waitfor_internal( acceptables, swagl() );
[9f5ecf5]	82
[42506e1]	83	switch( ret ) {
	84	case 0:
	85	{
	86	bar();
	87	}
	88	case 1:
[9f5ecf5]	89	{
[42506e1]	90	baz();
[9f5ecf5]	91	}
[42506e1]	92	case 2:
	93	signal(a);
	94	{
	95	break;
	96	}
	97	}
[9f5ecf5]	98	}
	99	}
	100	}*/
	101
	102	namespace Concurrency {
	103	//=============================================================================================
	104	// Pass declarations
	105	//=============================================================================================
	106
[1dcd9554]	107	class GenerateWaitForPass final : public WithIndexer {
[9f5ecf5]	108	public:
	109
	110	void premutate( FunctionDecl * decl );
	111	void premutate( StructDecl * decl );
	112
	113	Statement * postmutate( WaitForStmt * stmt );
	114
	115	static void generate( std::list< Declaration * > & translationUnit ) {
	116	PassVisitor< GenerateWaitForPass > impl;
	117	acceptAll( translationUnit, impl );
	118	}
	119
	120	ObjectDecl * declare( unsigned long count, CompoundStmt * stmt );
[aaa4f93]	121	ObjectDecl * declareFlag( CompoundStmt * stmt );
	122	Statement * makeSetter( ObjectDecl * flag );
[9f5ecf5]	123	ObjectDecl * declMon( WaitForStmt::Clause & clause, CompoundStmt * stmt );
[aaa4f93]	124	void init( ObjectDecl * acceptables, int index, WaitForStmt::Clause & clause, Statement * settter, CompoundStmt * stmt );
	125	Expression * init_timeout( Expression & time, Expression & time_cond, bool has_else, Expression & else_cond, Statement settter, CompoundStmt * stmt );
[1dcd9554]	126	Expression * call(size_t count, ObjectDecl * acceptables, Expression * timeout, CompoundStmt * stmt);
	127	void choose( WaitForStmt * waitfor, Expression * result, CompoundStmt * stmt );
[9f5ecf5]	128
	129	static void implement( std::list< Declaration * > & translationUnit ) {
	130	PassVisitor< GenerateWaitForPass > impl;
	131	mutateAll( translationUnit, impl );
	132	}
	133
	134
	135	private:
	136	FunctionDecl * decl_waitfor = nullptr;
[aaa4f93]	137	StructDecl * decl_mask = nullptr;
[9f5ecf5]	138	StructDecl * decl_acceptable = nullptr;
	139	StructDecl * decl_monitor = nullptr;
	140
	141	static std::unique_ptr< Type > generic_func;
	142
	143	UniqueName namer_acc = "__acceptables_"s;
[aaa4f93]	144	UniqueName namer_idx = "__index_"s;
	145	UniqueName namer_flg = "__do_run_"s;
	146	UniqueName namer_msk = "__mask_"s;
	147	UniqueName namer_mon = "__monitors_"s;
[9f5ecf5]	148	UniqueName namer_tim = "__timeout_"s;
	149	};
	150
	151	//=============================================================================================
	152	// General entry routine
	153	//=============================================================================================
	154	void generateWaitFor( std::list< Declaration * > & translationUnit ) {
	155	GenerateWaitForPass ::implement( translationUnit );
	156	}
	157
	158	//=============================================================================================
	159	// Generic helper routine
	160	//=============================================================================================
	161
	162	namespace {
	163	Expression * makeOpIndex( DeclarationWithType * array, unsigned long index ) {
[1dcd9554]	164	return new UntypedExpr(
[9f5ecf5]	165	new NameExpr( "?[?]" ),
	166	{
	167	new VariableExpr( array ),
	168	new ConstantExpr( Constant::from_ulong( index ) )
	169	}
	170	);
	171	}
	172
	173	Expression * makeOpAssign( Expression * lhs, Expression * rhs ) {
[1dcd9554]	174	return new UntypedExpr(
[9f5ecf5]	175	new NameExpr( "?=?" ),
	176	{ lhs, rhs }
	177	);
	178	}
	179
[1dcd9554]	180	Expression * makeOpMember( Expression * sue, const std::string & mem ) {
	181	return new UntypedMemberExpr( new NameExpr( mem ), sue );
[9f5ecf5]	182	}
	183
[1dcd9554]	184	Statement * makeAccStatement( DeclarationWithType * object, unsigned long index, const std::string & member, Expression * value, const SymTab::Indexer & indexer ) {
[08da53d]	185	Expression * expr = makeOpAssign(
[1dcd9554]	186	makeOpMember(
	187	makeOpIndex(
	188	object,
	189	index
[9f5ecf5]	190	),
[1dcd9554]	191	member
	192	),
	193	value
[08da53d]	194	);
	195
	196	ResolvExpr::findVoidExpression( expr, indexer );
[1dcd9554]	197
[ba3706f]	198	return new ExprStmt( expr );
[9f5ecf5]	199	}
	200
	201	Expression * safeCond( Expression * expr, bool ifnull = true ) {
	202	if( expr ) return expr;
	203
	204	return new ConstantExpr( Constant::from_bool( ifnull ) );
	205	}
[310e5b7]	206
	207	VariableExpr * extractVariable( Expression * func ) {
	208	if( VariableExpr * var = dynamic_cast< VariableExpr * >( func ) ) {
	209	return var;
	210	}
	211
	212	CastExpr * cast = strict_dynamic_cast< CastExpr * >( func );
	213	return strict_dynamic_cast< VariableExpr * >( cast->arg );
	214	}
	215
[8f98b78]	216	Expression * detectIsDtor( Expression * func ) {
[310e5b7]	217	VariableExpr * typed_func = extractVariable( func );
	218	bool is_dtor = InitTweak::isDestructor( typed_func->var );
	219	return new ConstantExpr( Constant::from_bool( is_dtor ) );
	220	}
[9f5ecf5]	221	};
	222
	223
	224	//=============================================================================================
	225	// Generate waitfor implementation
	226	//=============================================================================================
	227
	228	void GenerateWaitForPass::premutate( FunctionDecl * decl) {
[310e5b7]	229	if( decl->name != "__waitfor_internal" ) return;
[9f5ecf5]	230
	231	decl_waitfor = decl;
	232	}
	233
	234	void GenerateWaitForPass::premutate( StructDecl * decl ) {
	235	if( ! decl->body ) return;
	236
	237	if( decl->name == "__acceptable_t" ) {
	238	assert( !decl_acceptable );
	239	decl_acceptable = decl;
	240	}
[aaa4f93]	241	else if( decl->name == "__waitfor_mask_t" ) {
	242	assert( !decl_mask );
	243	decl_mask = decl;
	244	}
[9f5ecf5]	245	else if( decl->name == "monitor_desc" ) {
	246	assert( !decl_monitor );
	247	decl_monitor = decl;
	248	}
	249	}
	250
	251	Statement * GenerateWaitForPass::postmutate( WaitForStmt * waitfor ) {
[d55d7a6]	252	if( !decl_monitor \|\| !decl_acceptable \|\| !decl_mask )
[73abe95]	253	SemanticError( waitfor, "waitfor keyword requires monitors to be in scope, add #include <monitor.hfa>" );
[9f5ecf5]	254
[ba3706f]	255	CompoundStmt * stmt = new CompoundStmt();
[9f5ecf5]	256
	257	ObjectDecl * acceptables = declare( waitfor->clauses.size(), stmt );
[aaa4f93]	258	ObjectDecl * flag = declareFlag( stmt );
	259	Statement * setter = makeSetter( flag );
[9f5ecf5]	260
	261	int index = 0;
	262	for( auto & clause : waitfor->clauses ) {
[aaa4f93]	263	init( acceptables, index, clause, setter, stmt );
[9f5ecf5]	264
	265	index++;
	266	}
	267
	268	Expression * timeout = init_timeout(
	269	waitfor->timeout.time,
	270	waitfor->timeout.condition,
	271	waitfor->orelse .statement,
	272	waitfor->orelse .condition,
[aaa4f93]	273	setter,
[9f5ecf5]	274	stmt
	275	);
	276
[ba3706f]	277	CompoundStmt * compound = new CompoundStmt();
[aaa4f93]	278	stmt->push_back( new IfStmt(
	279	safeCond( new VariableExpr( flag ) ),
	280	compound,
	281	nullptr
	282	));
	283
	284	Expression * result = call( waitfor->clauses.size(), acceptables, timeout, compound );
[9f5ecf5]	285
[aaa4f93]	286	choose( waitfor, result, compound );
[9f5ecf5]	287
	288	return stmt;
	289	}
	290
	291	ObjectDecl * GenerateWaitForPass::declare( unsigned long count, CompoundStmt * stmt )
	292	{
[1dcd9554]	293	ObjectDecl * acceptables = ObjectDecl::newObject(
[9f5ecf5]	294	namer_acc.newName(),
	295	new ArrayType(
	296	noQualifiers,
	297	new StructInstType(
	298	noQualifiers,
	299	decl_acceptable
	300	),
	301	new ConstantExpr( Constant::from_ulong( count ) ),
	302	false,
	303	false
	304	),
	305	nullptr
	306	);
	307
[ba3706f]	308	stmt->push_back( new DeclStmt( acceptables) );
[9f5ecf5]	309
[08da53d]	310	Expression * set = new UntypedExpr(
[aaa4f93]	311	new NameExpr( "__builtin_memset" ),
	312	{
	313	new VariableExpr( acceptables ),
	314	new ConstantExpr( Constant::from_int( 0 ) ),
	315	new SizeofExpr( new VariableExpr( acceptables ) )
	316	}
	317	);
	318
[08da53d]	319	ResolvExpr::findVoidExpression( set, indexer );
[aaa4f93]	320
[ba3706f]	321	stmt->push_back( new ExprStmt( set ) );
[aaa4f93]	322
[9f5ecf5]	323	return acceptables;
	324	}
	325
[aaa4f93]	326	ObjectDecl * GenerateWaitForPass::declareFlag( CompoundStmt * stmt ) {
	327	ObjectDecl * flag = ObjectDecl::newObject(
	328	namer_flg.newName(),
	329	new BasicType(
	330	noQualifiers,
[e15853c]	331	BasicType::Bool
[aaa4f93]	332	),
	333	new SingleInit( new ConstantExpr( Constant::from_ulong( 0 ) ) )
	334	);
	335
[ba3706f]	336	stmt->push_back( new DeclStmt( flag) );
[aaa4f93]	337
	338	return flag;
	339	}
	340
	341	Statement * GenerateWaitForPass::makeSetter( ObjectDecl * flag ) {
[08da53d]	342	Expression * expr = new UntypedExpr(
[aaa4f93]	343	new NameExpr( "?=?" ),
	344	{
	345	new VariableExpr( flag ),
	346	new ConstantExpr( Constant::from_ulong( 1 ) )
	347	}
	348	);
	349
[08da53d]	350	ResolvExpr::findVoidExpression( expr, indexer );
[aaa4f93]	351
[ba3706f]	352	return new ExprStmt( expr );
[aaa4f93]	353	}
	354
[9f5ecf5]	355	ObjectDecl * GenerateWaitForPass::declMon( WaitForStmt::Clause & clause, CompoundStmt * stmt ) {
	356
[1dcd9554]	357	ObjectDecl * mon = ObjectDecl::newObject(
[9f5ecf5]	358	namer_mon.newName(),
	359	new ArrayType(
	360	noQualifiers,
[8f98b78]	361	new PointerType(
[9f5ecf5]	362	noQualifiers,
[8f98b78]	363	new StructInstType(
	364	noQualifiers,
	365	decl_monitor
	366	)
[9f5ecf5]	367	),
	368	new ConstantExpr( Constant::from_ulong( clause.target.arguments.size() ) ),
	369	false,
	370	false
	371	),
	372	new ListInit(
	373	map_range < std::list<Initializer> > ( clause.target.arguments, [this](Expression expr ){
[08da53d]	374	Expression * init = new CastExpr(
[8f98b78]	375	new UntypedExpr(
	376	new NameExpr( "get_monitor" ),
	377	{ expr }
	378	),
	379	new PointerType(
	380	noQualifiers,
	381	new StructInstType(
	382	noQualifiers,
	383	decl_monitor
	384	)
	385	)
	386	);
	387
[08da53d]	388	ResolvExpr::findSingleExpression( init, indexer );
[8f98b78]	389	return new SingleInit( init );
[9f5ecf5]	390	})
	391	)
	392	);
	393
[ba3706f]	394	stmt->push_back( new DeclStmt( mon) );
[9f5ecf5]	395
	396	return mon;
	397	}
	398
[aaa4f93]	399	void GenerateWaitForPass::init( ObjectDecl * acceptables, int index, WaitForStmt::Clause & clause, Statement * setter, CompoundStmt * stmt ) {
[9f5ecf5]	400
	401	ObjectDecl * monitors = declMon( clause, stmt );
	402
[1dcd9554]	403	Type * fptr_t = new PointerType( noQualifiers, new FunctionType( noQualifiers, true ) );
	404
[9f5ecf5]	405	stmt->push_back( new IfStmt(
	406	safeCond( clause.condition ),
[aaa4f93]	407	new CompoundStmt({
	408	makeAccStatement( acceptables, index, "is_dtor", detectIsDtor( clause.target.function ) , indexer ),
	409	makeAccStatement( acceptables, index, "func" , new CastExpr( clause.target.function, fptr_t ) , indexer ),
[0cf5b79]	410	makeAccStatement( acceptables, index, "data" , new VariableExpr( monitors ) , indexer ),
[aaa4f93]	411	makeAccStatement( acceptables, index, "size" , new ConstantExpr( Constant::from_ulong( clause.target.arguments.size() ) ), indexer ),
	412	setter->clone()
	413	}),
[9f5ecf5]	414	nullptr
	415	));
	416
	417	clause.target.function = nullptr;
	418	clause.target.arguments.empty();
	419	clause.condition = nullptr;
	420	}
	421
	422	Expression * GenerateWaitForPass::init_timeout(
	423	Expression *& time,
	424	Expression *& time_cond,
	425	bool has_else,
	426	Expression *& else_cond,
[aaa4f93]	427	Statement * setter,
[9f5ecf5]	428	CompoundStmt * stmt
	429	) {
[1dcd9554]	430	ObjectDecl * timeout = ObjectDecl::newObject(
[9f5ecf5]	431	namer_tim.newName(),
	432	new BasicType(
	433	noQualifiers,
	434	BasicType::LongLongUnsignedInt
	435	),
	436	new SingleInit(
	437	new ConstantExpr( Constant::from_int( -1 ) )
	438	)
	439	);
	440
[ba3706f]	441	stmt->push_back( new DeclStmt( timeout ) );
[9f5ecf5]	442
	443	if( time ) {
	444	stmt->push_back( new IfStmt(
[1dcd9554]	445	safeCond( time_cond ),
[aaa4f93]	446	new CompoundStmt({
	447	new ExprStmt(
	448	makeOpAssign(
	449	new VariableExpr( timeout ),
	450	time
	451	)
	452	),
	453	setter->clone()
	454	}),
[9f5ecf5]	455	nullptr
	456	));
	457
	458	time = time_cond = nullptr;
	459	}
	460
	461	if( has_else ) {
	462	stmt->push_back( new IfStmt(
	463	safeCond( else_cond ),
[aaa4f93]	464	new CompoundStmt({
	465	new ExprStmt(
	466	makeOpAssign(
	467	new VariableExpr( timeout ),
	468	new ConstantExpr( Constant::from_ulong( 0 ) )
	469	)
	470	),
	471	setter->clone()
	472	}),
[9f5ecf5]	473	nullptr
	474	));
	475
	476	else_cond = nullptr;
	477	}
	478
[aaa4f93]	479	delete setter;
	480
[9f5ecf5]	481	return new VariableExpr( timeout );
	482	}
[1dcd9554]	483
	484	Expression * GenerateWaitForPass::call(
	485	size_t count,
	486	ObjectDecl * acceptables,
	487	Expression * timeout,
	488	CompoundStmt * stmt
	489	) {
[aaa4f93]	490	ObjectDecl * index = ObjectDecl::newObject(
	491	namer_idx.newName(),
[1dcd9554]	492	new BasicType(
	493	noQualifiers,
[aaa4f93]	494	BasicType::ShortSignedInt
[1dcd9554]	495	),
	496	new SingleInit(
[aaa4f93]	497	new ConstantExpr( Constant::from_int( -1 ) )
[1dcd9554]	498	)
	499	);
	500
[ba3706f]	501	stmt->push_back( new DeclStmt( index ) );
[aaa4f93]	502
	503	ObjectDecl * mask = ObjectDecl::newObject(
	504	namer_msk.newName(),
	505	new StructInstType(
	506	noQualifiers,
	507	decl_mask
	508	),
	509	new ListInit({
	510	new SingleInit( new AddressExpr( new VariableExpr( index ) ) ),
[d2d50d7]	511	new ListInit({
	512	new SingleInit( new VariableExpr( acceptables ) ),
	513	new SingleInit( new ConstantExpr( Constant::from_ulong( count ) ) )
	514	})
[aaa4f93]	515	})
	516	);
	517
[ba3706f]	518	stmt->push_back( new DeclStmt( mask ) );
[aaa4f93]	519
	520	stmt->push_back( new ExprStmt(
	521	new ApplicationExpr(
	522	VariableExpr::functionPointer( decl_waitfor ),
	523	{
	524	new CastExpr(
	525	new VariableExpr( mask ),
	526	new ReferenceType(
	527	noQualifiers,
	528	new StructInstType(
	529	noQualifiers,
	530	decl_mask
	531	)
	532	)
	533	),
	534	timeout
	535	}
	536	)
	537	));
[1dcd9554]	538
[aaa4f93]	539	return new VariableExpr( index );
[1dcd9554]	540	}
	541
	542	void GenerateWaitForPass::choose(
	543	WaitForStmt * waitfor,
	544	Expression * result,
	545	CompoundStmt * stmt
	546	) {
	547	SwitchStmt * swtch = new SwitchStmt(
	548	result,
	549	std::list<Statement *>()
	550	);
	551
	552	unsigned long i = 0;
	553	for( auto & clause : waitfor->clauses ) {
	554	swtch->statements.push_back(
	555	new CaseStmt(
	556	new ConstantExpr( Constant::from_ulong( i++ ) ),
	557	{
[42506e1]	558	new CompoundStmt({
	559	clause.statement,
	560	new BranchStmt(
	561	"",
	562	BranchStmt::Break
	563	)
	564	})
[1dcd9554]	565	}
	566	)
	567	);
	568	}
	569
	570	if(waitfor->timeout.statement) {
	571	swtch->statements.push_back(
	572	new CaseStmt(
[b18830e]	573	new ConstantExpr( Constant::from_int( -2 ) ),
[1dcd9554]	574	{
[42506e1]	575	new CompoundStmt({
	576	waitfor->timeout.statement,
	577	new BranchStmt(
	578	"",
	579	BranchStmt::Break
	580	)
	581	})
[1dcd9554]	582	}
	583	)
	584	);
	585	}
	586
	587	if(waitfor->orelse.statement) {
	588	swtch->statements.push_back(
	589	new CaseStmt(
[b18830e]	590	new ConstantExpr( Constant::from_int( -1 ) ),
[1dcd9554]	591	{
[42506e1]	592	new CompoundStmt({
	593	waitfor->orelse.statement,
	594	new BranchStmt(
	595	"",
	596	BranchStmt::Break
	597	)
	598	})
[1dcd9554]	599	}
	600	)
	601	);
	602	}
	603
	604	stmt->push_back( swtch );
	605	}
[9f5ecf5]	606	};
	607
	608	// Local Variables: //
	609	// mode: c //
	610	// tab-width: 4 //
[08da53d]	611	// End: //

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