[9f5ecf5] | 1 | // |
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo |
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| 3 | // |
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| 4 | // The contents of this file are covered under the licence agreement in the |
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| 5 | // file "LICENCE" distributed with Cforall. |
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| 6 | // |
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| 7 | // Waitfor.cc -- |
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| 8 | // |
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| 9 | // Author : Thierry Delisle |
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| 10 | // Created On : Mon Aug 28 11:06:52 2017 |
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| 11 | // Last Modified By : |
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| 12 | // Last Modified On : |
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| 13 | // Update Count : 5 |
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| 14 | // |
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| 15 | |
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| 16 | #include "Concurrency/Keywords.h" |
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| 17 | |
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| 18 | #include <cassert> // for assert |
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| 19 | #include <string> // for string, operator== |
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| 20 | |
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| 21 | using namespace std::string_literals; |
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| 22 | |
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| 23 | #include "Common/PassVisitor.h" // for PassVisitor |
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| 24 | #include "Common/SemanticError.h" // for SemanticError |
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| 25 | #include "Common/utility.h" // for deleteAll, map_range |
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| 26 | #include "CodeGen/OperatorTable.h" // for isConstructor |
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| 27 | #include "InitTweak/InitTweak.h" // for getPointerBase |
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| 28 | #include "Parser/LinkageSpec.h" // for Cforall |
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| 29 | #include "SymTab/AddVisit.h" // for acceptAndAdd |
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| 30 | #include "SynTree/Constant.h" // for Constant |
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| 31 | #include "SynTree/Declaration.h" // for StructDecl, FunctionDecl, ObjectDecl |
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| 32 | #include "SynTree/Expression.h" // for VariableExpr, ConstantExpr, Untype... |
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| 33 | #include "SynTree/Initializer.h" // for SingleInit, ListInit, Initializer ... |
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| 34 | #include "SynTree/Label.h" // for Label |
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| 35 | #include "SynTree/Statement.h" // for CompoundStmt, DeclStmt, ExprStmt |
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| 36 | #include "SynTree/Type.h" // for StructInstType, Type, PointerType |
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| 37 | #include "SynTree/Visitor.h" // for Visitor, acceptAll |
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| 38 | |
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| 39 | class Attribute; |
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| 40 | /* |
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| 41 | void foo() { |
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| 42 | while( true ) { |
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| 43 | when( a < 1 ) waitfor( f, a ) { bar(); } |
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| 44 | or timeout( swagl() ); |
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| 45 | or waitfor( g, a ) { baz(); } |
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| 46 | or waitfor( ^?{}, a ) { break; } |
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| 47 | or waitfor( ^?{} ) { break; } |
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| 48 | } |
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| 49 | } |
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| 50 | |
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| 51 | void f(int i, float f, A & mutex b, struct foo * ); |
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| 52 | void f(int ); |
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| 53 | |
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| 54 | |
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| 55 | | | |
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| 56 | | | |
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| 57 | | | |
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| 58 | | | |
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| 59 | | | |
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| 60 | \ | | / |
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| 61 | \ / |
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| 62 | \ / |
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| 63 | \/ |
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| 64 | |
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| 65 | |
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| 66 | void foo() { |
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| 67 | while( true ) { |
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| 68 | |
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| 69 | acceptable_t acceptables[3]; |
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| 70 | if( a < 1 ) { |
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| 71 | acceptables[0].func = f; |
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| 72 | acceptables[0].mon = a; |
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| 73 | } |
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| 74 | acceptables[1].func = g; |
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| 75 | acceptables[1].mon = a; |
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| 76 | |
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| 77 | acceptables[2].func = f; |
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| 78 | acceptables[2].mon = a; |
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| 79 | acceptables[2].is_dtor = true; |
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| 80 | |
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| 81 | int ret = waitfor_internal( acceptables, swagl() ); |
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| 82 | |
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| 83 | switch( ret ) { |
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| 84 | case 0: |
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| 85 | { |
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| 86 | bar(); |
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| 87 | } |
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| 88 | case 1: |
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| 89 | { |
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| 90 | baz(); |
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| 91 | } |
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| 92 | case 2: |
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| 93 | signal(a); |
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| 94 | { |
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| 95 | break; |
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| 96 | } |
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| 97 | } |
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| 98 | } |
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| 99 | }*/ |
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| 100 | |
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| 101 | namespace Concurrency { |
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| 102 | |
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| 103 | namespace { |
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| 104 | const std::list<Label> noLabels; |
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| 105 | const std::list< Attribute * > noAttributes; |
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| 106 | Type::StorageClasses noStorage; |
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| 107 | Type::Qualifiers noQualifiers; |
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| 108 | } |
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| 109 | |
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| 110 | //============================================================================================= |
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| 111 | // Pass declarations |
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| 112 | //============================================================================================= |
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| 113 | |
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| 114 | class GenerateWaitForPass final : public WithStmtsToAdd { |
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| 115 | public: |
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| 116 | |
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| 117 | void premutate( FunctionDecl * decl ); |
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| 118 | void premutate( StructDecl * decl ); |
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| 119 | |
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| 120 | Statement * postmutate( WaitForStmt * stmt ); |
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| 121 | |
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| 122 | static void generate( std::list< Declaration * > & translationUnit ) { |
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| 123 | PassVisitor< GenerateWaitForPass > impl; |
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| 124 | acceptAll( translationUnit, impl ); |
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| 125 | } |
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| 126 | |
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| 127 | ObjectDecl * declare( unsigned long count, CompoundStmt * stmt ); |
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| 128 | ObjectDecl * declMon( WaitForStmt::Clause & clause, CompoundStmt * stmt ); |
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| 129 | void init( ObjectDecl * acceptables, int index, WaitForStmt::Clause & clause, CompoundStmt * stmt ); |
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| 130 | Expression * init_timeout( Expression *& time, Expression *& time_cond, bool has_else, Expression *& else_cond, CompoundStmt * stmt ); |
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| 131 | Expression * call(); |
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| 132 | void choose(); |
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| 133 | |
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| 134 | static void implement( std::list< Declaration * > & translationUnit ) { |
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| 135 | PassVisitor< GenerateWaitForPass > impl; |
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| 136 | mutateAll( translationUnit, impl ); |
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| 137 | } |
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| 138 | |
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| 139 | |
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| 140 | private: |
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| 141 | FunctionDecl * decl_waitfor = nullptr; |
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| 142 | StructDecl * decl_acceptable = nullptr; |
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| 143 | StructDecl * decl_monitor = nullptr; |
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| 144 | DeclarationWithType * decl_m_func = nullptr; |
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| 145 | DeclarationWithType * decl_m_count = nullptr; |
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| 146 | DeclarationWithType * decl_m_monitors = nullptr; |
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| 147 | DeclarationWithType * decl_m_isdtor = nullptr; |
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| 148 | |
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| 149 | static std::unique_ptr< Type > generic_func; |
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| 150 | |
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| 151 | UniqueName namer_mon = "__monitors_"s; |
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| 152 | UniqueName namer_acc = "__acceptables_"s; |
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| 153 | UniqueName namer_tim = "__timeout_"s; |
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| 154 | }; |
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| 155 | |
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| 156 | //============================================================================================= |
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| 157 | // General entry routine |
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| 158 | //============================================================================================= |
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| 159 | void generateWaitFor( std::list< Declaration * > & translationUnit ) { |
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| 160 | GenerateWaitForPass ::implement( translationUnit ); |
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| 161 | } |
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| 162 | |
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| 163 | //============================================================================================= |
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| 164 | // Generic helper routine |
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| 165 | //============================================================================================= |
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| 166 | |
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| 167 | namespace { |
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| 168 | Expression * makeOpIndex( DeclarationWithType * array, unsigned long index ) { |
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| 169 | return new ApplicationExpr( |
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| 170 | new NameExpr( "?[?]" ), |
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| 171 | { |
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| 172 | new VariableExpr( array ), |
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| 173 | new ConstantExpr( Constant::from_ulong( index ) ) |
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| 174 | } |
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| 175 | ); |
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| 176 | } |
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| 177 | |
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| 178 | Expression * makeOpAssign( Expression * lhs, Expression * rhs ) { |
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| 179 | return new ApplicationExpr( |
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| 180 | new NameExpr( "?=?" ), |
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| 181 | { lhs, rhs } |
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| 182 | ); |
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| 183 | } |
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| 184 | |
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| 185 | Expression * makeOpMember( Expression * sue, DeclarationWithType * mem ) { |
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| 186 | return new MemberExpr( mem, sue ); |
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| 187 | } |
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| 188 | |
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| 189 | Statement * makeAccStatement( DeclarationWithType * object, unsigned long index, DeclarationWithType * member, Expression * value ) { |
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| 190 | return new ExprStmt( |
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| 191 | noLabels, |
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| 192 | makeOpAssign( |
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| 193 | makeOpMember( |
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| 194 | makeOpIndex( |
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| 195 | object, |
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| 196 | index |
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| 197 | ), |
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| 198 | member |
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| 199 | ), |
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| 200 | value |
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| 201 | ) |
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| 202 | ); |
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| 203 | } |
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| 204 | |
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| 205 | Expression * safeCond( Expression * expr, bool ifnull = true ) { |
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| 206 | if( expr ) return expr; |
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| 207 | |
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| 208 | return new ConstantExpr( Constant::from_bool( ifnull ) ); |
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| 209 | } |
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| 210 | }; |
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| 211 | |
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| 212 | |
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| 213 | //============================================================================================= |
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| 214 | // Generate waitfor implementation |
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| 215 | //============================================================================================= |
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| 216 | |
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| 217 | void GenerateWaitForPass::premutate( FunctionDecl * decl) { |
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| 218 | if( decl->name != "__accept_internal" ) return; |
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| 219 | |
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| 220 | decl_waitfor = decl; |
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| 221 | } |
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| 222 | |
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| 223 | void GenerateWaitForPass::premutate( StructDecl * decl ) { |
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| 224 | if( ! decl->body ) return; |
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| 225 | |
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| 226 | if( decl->name == "__acceptable_t" ) { |
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| 227 | assert( !decl_acceptable ); |
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| 228 | decl_acceptable = decl; |
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| 229 | for( Declaration * field : decl_acceptable->members ) { |
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[e3e16bc] | 230 | if( field->name == "func" ) decl_m_func = strict_dynamic_cast< DeclarationWithType * >( field ); |
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| 231 | else if( field->name == "count" ) decl_m_count = strict_dynamic_cast< DeclarationWithType * >( field ); |
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| 232 | else if( field->name == "monitor" ) decl_m_monitors = strict_dynamic_cast< DeclarationWithType * >( field ); |
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| 233 | else if( field->name == "is_dtor" ) decl_m_isdtor = strict_dynamic_cast< DeclarationWithType * >( field ); |
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[9f5ecf5] | 234 | } |
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| 235 | |
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| 236 | } |
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| 237 | else if( decl->name == "monitor_desc" ) { |
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| 238 | assert( !decl_monitor ); |
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| 239 | decl_monitor = decl; |
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| 240 | } |
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| 241 | } |
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| 242 | |
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| 243 | Statement * GenerateWaitForPass::postmutate( WaitForStmt * waitfor ) { |
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| 244 | return waitfor; |
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| 245 | |
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| 246 | if( !decl_monitor || !decl_acceptable ) throw SemanticError( "waitfor keyword requires monitors to be in scope, add #include <monitor>", waitfor ); |
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| 247 | |
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| 248 | CompoundStmt * stmt = new CompoundStmt( noLabels ); |
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| 249 | |
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| 250 | ObjectDecl * acceptables = declare( waitfor->clauses.size(), stmt ); |
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| 251 | |
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| 252 | int index = 0; |
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| 253 | for( auto & clause : waitfor->clauses ) { |
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| 254 | init( acceptables, index, clause, stmt ); |
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| 255 | |
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| 256 | index++; |
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| 257 | } |
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| 258 | |
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| 259 | Expression * timeout = init_timeout( |
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| 260 | waitfor->timeout.time, |
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| 261 | waitfor->timeout.condition, |
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| 262 | waitfor->orelse .statement, |
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| 263 | waitfor->orelse .condition, |
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| 264 | stmt |
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| 265 | ); |
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| 266 | |
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| 267 | // Expression * result = call( acceptables, timeout, orelse, stmt ); |
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| 268 | |
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| 269 | // choose( waitfor, result ); |
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| 270 | |
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| 271 | return stmt; |
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| 272 | } |
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| 273 | |
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| 274 | ObjectDecl * GenerateWaitForPass::declare( unsigned long count, CompoundStmt * stmt ) |
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| 275 | { |
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| 276 | ObjectDecl * acceptables = new ObjectDecl( |
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| 277 | namer_acc.newName(), |
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| 278 | noStorage, |
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| 279 | LinkageSpec::Cforall, |
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| 280 | nullptr, |
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| 281 | new ArrayType( |
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| 282 | noQualifiers, |
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| 283 | new StructInstType( |
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| 284 | noQualifiers, |
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| 285 | decl_acceptable |
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| 286 | ), |
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| 287 | new ConstantExpr( Constant::from_ulong( count ) ), |
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| 288 | false, |
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| 289 | false |
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| 290 | ), |
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| 291 | nullptr |
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| 292 | ); |
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| 293 | |
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| 294 | stmt->push_back( new DeclStmt( noLabels, acceptables) ); |
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| 295 | |
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| 296 | return acceptables; |
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| 297 | } |
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| 298 | |
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| 299 | ObjectDecl * GenerateWaitForPass::declMon( WaitForStmt::Clause & clause, CompoundStmt * stmt ) { |
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| 300 | |
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| 301 | ObjectDecl * mon = new ObjectDecl( |
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| 302 | namer_mon.newName(), |
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| 303 | noStorage, |
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| 304 | LinkageSpec::Cforall, |
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| 305 | nullptr, |
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| 306 | new ArrayType( |
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| 307 | noQualifiers, |
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| 308 | new StructInstType( |
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| 309 | noQualifiers, |
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| 310 | decl_monitor |
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| 311 | ), |
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| 312 | new ConstantExpr( Constant::from_ulong( clause.target.arguments.size() ) ), |
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| 313 | false, |
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| 314 | false |
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| 315 | ), |
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| 316 | new ListInit( |
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| 317 | map_range < std::list<Initializer*> > ( clause.target.arguments, [this](Expression * expr ){ |
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| 318 | return new SingleInit( expr ); |
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| 319 | }) |
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| 320 | ) |
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| 321 | ); |
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| 322 | |
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| 323 | stmt->push_back( new DeclStmt( noLabels, mon) ); |
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| 324 | |
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| 325 | return mon; |
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| 326 | } |
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| 327 | |
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| 328 | void GenerateWaitForPass::init( ObjectDecl * acceptables, int index, WaitForStmt::Clause & clause, CompoundStmt * stmt ) { |
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| 329 | |
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| 330 | ObjectDecl * monitors = declMon( clause, stmt ); |
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| 331 | |
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| 332 | CompoundStmt * compound = new CompoundStmt( noLabels ); |
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| 333 | compound->push_back( makeAccStatement( acceptables, index, decl_m_func , clause.target.function ) ); |
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| 334 | compound->push_back( makeAccStatement( acceptables, index, decl_m_count , new ConstantExpr( Constant::from_ulong( clause.target.arguments.size() ) ) ) ); |
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| 335 | compound->push_back( makeAccStatement( acceptables, index, decl_m_monitors, new VariableExpr( monitors ) ) ); |
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| 336 | compound->push_back( makeAccStatement( acceptables, index, decl_m_isdtor , new ConstantExpr( Constant::from_bool( true ) ) ) ); |
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| 337 | |
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| 338 | stmt->push_back( new IfStmt( |
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| 339 | noLabels, |
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| 340 | safeCond( clause.condition ), |
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| 341 | compound, |
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| 342 | nullptr |
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| 343 | )); |
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| 344 | |
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| 345 | clause.target.function = nullptr; |
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| 346 | clause.target.arguments.empty(); |
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| 347 | clause.condition = nullptr; |
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| 348 | } |
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| 349 | |
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| 350 | Expression * GenerateWaitForPass::init_timeout( |
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| 351 | Expression *& time, |
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| 352 | Expression *& time_cond, |
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| 353 | bool has_else, |
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| 354 | Expression *& else_cond, |
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| 355 | CompoundStmt * stmt |
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| 356 | ) { |
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| 357 | ObjectDecl * timeout = new ObjectDecl( |
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| 358 | namer_tim.newName(), |
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| 359 | noStorage, |
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| 360 | LinkageSpec::Cforall, |
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| 361 | nullptr, |
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| 362 | new BasicType( |
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| 363 | noQualifiers, |
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| 364 | BasicType::LongLongUnsignedInt |
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| 365 | ), |
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| 366 | new SingleInit( |
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| 367 | new ConstantExpr( Constant::from_int( -1 ) ) |
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| 368 | ) |
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| 369 | ); |
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| 370 | |
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| 371 | stmt->push_back( new DeclStmt( noLabels, timeout ) ); |
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| 372 | |
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| 373 | if( time ) { |
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| 374 | stmt->push_back( new IfStmt( |
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| 375 | noLabels, |
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| 376 | safeCond( else_cond ), |
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| 377 | new ExprStmt( |
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| 378 | noLabels, |
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| 379 | makeOpAssign( |
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| 380 | new VariableExpr( timeout ), |
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| 381 | time |
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| 382 | ) |
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| 383 | ), |
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| 384 | nullptr |
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| 385 | )); |
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| 386 | |
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| 387 | time = time_cond = nullptr; |
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| 388 | } |
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| 389 | |
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| 390 | if( has_else ) { |
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| 391 | stmt->push_back( new IfStmt( |
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| 392 | noLabels, |
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| 393 | safeCond( else_cond ), |
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| 394 | new ExprStmt( |
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| 395 | noLabels, |
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| 396 | makeOpAssign( |
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| 397 | new VariableExpr( timeout ), |
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| 398 | new ConstantExpr( Constant::from_ulong( 0 ) ) |
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| 399 | ) |
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| 400 | ), |
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| 401 | nullptr |
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| 402 | )); |
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| 403 | |
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| 404 | else_cond = nullptr; |
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| 405 | } |
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| 406 | |
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| 407 | return new VariableExpr( timeout ); |
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| 408 | } |
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| 409 | }; |
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| 410 | |
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| 411 | // Local Variables: // |
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| 412 | // mode: c // |
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| 413 | // tab-width: 4 // |
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| 414 | // End: // |
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