[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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[1dcd9554] | 29 | #include "ResolvExpr/Resolver.h" // for findVoidExpression |
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[9f5ecf5] | 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 | // Pass declarations |
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| 104 | //============================================================================================= |
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| 105 | |
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[1dcd9554] | 106 | class GenerateWaitForPass final : public WithIndexer { |
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[9f5ecf5] | 107 | public: |
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| 108 | |
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| 109 | void premutate( FunctionDecl * decl ); |
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| 110 | void premutate( StructDecl * decl ); |
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| 111 | |
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| 112 | Statement * postmutate( WaitForStmt * stmt ); |
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| 113 | |
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| 114 | static void generate( std::list< Declaration * > & translationUnit ) { |
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| 115 | PassVisitor< GenerateWaitForPass > impl; |
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| 116 | acceptAll( translationUnit, impl ); |
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| 117 | } |
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| 118 | |
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| 119 | ObjectDecl * declare( unsigned long count, CompoundStmt * stmt ); |
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[aaa4f93] | 120 | ObjectDecl * declareFlag( CompoundStmt * stmt ); |
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| 121 | Statement * makeSetter( ObjectDecl * flag ); |
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[9f5ecf5] | 122 | ObjectDecl * declMon( WaitForStmt::Clause & clause, CompoundStmt * stmt ); |
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[aaa4f93] | 123 | void init( ObjectDecl * acceptables, int index, WaitForStmt::Clause & clause, Statement * settter, CompoundStmt * stmt ); |
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| 124 | Expression * init_timeout( Expression *& time, Expression *& time_cond, bool has_else, Expression *& else_cond, Statement * settter, CompoundStmt * stmt ); |
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[1dcd9554] | 125 | Expression * call(size_t count, ObjectDecl * acceptables, Expression * timeout, CompoundStmt * stmt); |
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| 126 | void choose( WaitForStmt * waitfor, Expression * result, CompoundStmt * stmt ); |
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[9f5ecf5] | 127 | |
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| 128 | static void implement( std::list< Declaration * > & translationUnit ) { |
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| 129 | PassVisitor< GenerateWaitForPass > impl; |
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| 130 | mutateAll( translationUnit, impl ); |
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| 131 | } |
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| 132 | |
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| 133 | |
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| 134 | private: |
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| 135 | FunctionDecl * decl_waitfor = nullptr; |
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[aaa4f93] | 136 | StructDecl * decl_mask = nullptr; |
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[9f5ecf5] | 137 | StructDecl * decl_acceptable = nullptr; |
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| 138 | StructDecl * decl_monitor = nullptr; |
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| 139 | |
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| 140 | UniqueName namer_acc = "__acceptables_"s; |
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[aaa4f93] | 141 | UniqueName namer_idx = "__index_"s; |
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| 142 | UniqueName namer_flg = "__do_run_"s; |
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| 143 | UniqueName namer_msk = "__mask_"s; |
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| 144 | UniqueName namer_mon = "__monitors_"s; |
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[9f5ecf5] | 145 | UniqueName namer_tim = "__timeout_"s; |
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| 146 | }; |
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| 147 | |
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| 148 | //============================================================================================= |
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| 149 | // General entry routine |
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| 150 | //============================================================================================= |
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| 151 | void generateWaitFor( std::list< Declaration * > & translationUnit ) { |
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| 152 | GenerateWaitForPass ::implement( translationUnit ); |
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| 153 | } |
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| 154 | |
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| 155 | //============================================================================================= |
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| 156 | // Generic helper routine |
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| 157 | //============================================================================================= |
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| 158 | |
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| 159 | namespace { |
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| 160 | Expression * makeOpIndex( DeclarationWithType * array, unsigned long index ) { |
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[1dcd9554] | 161 | return new UntypedExpr( |
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[9f5ecf5] | 162 | new NameExpr( "?[?]" ), |
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| 163 | { |
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| 164 | new VariableExpr( array ), |
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| 165 | new ConstantExpr( Constant::from_ulong( index ) ) |
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| 166 | } |
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| 167 | ); |
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| 168 | } |
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| 169 | |
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| 170 | Expression * makeOpAssign( Expression * lhs, Expression * rhs ) { |
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[1dcd9554] | 171 | return new UntypedExpr( |
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[9f5ecf5] | 172 | new NameExpr( "?=?" ), |
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| 173 | { lhs, rhs } |
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| 174 | ); |
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| 175 | } |
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| 176 | |
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[1dcd9554] | 177 | Expression * makeOpMember( Expression * sue, const std::string & mem ) { |
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| 178 | return new UntypedMemberExpr( new NameExpr( mem ), sue ); |
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[9f5ecf5] | 179 | } |
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| 180 | |
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[1dcd9554] | 181 | Statement * makeAccStatement( DeclarationWithType * object, unsigned long index, const std::string & member, Expression * value, const SymTab::Indexer & indexer ) { |
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[08da53d] | 182 | Expression * expr = makeOpAssign( |
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[1dcd9554] | 183 | makeOpMember( |
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| 184 | makeOpIndex( |
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| 185 | object, |
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| 186 | index |
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[9f5ecf5] | 187 | ), |
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[1dcd9554] | 188 | member |
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| 189 | ), |
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| 190 | value |
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[08da53d] | 191 | ); |
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| 192 | |
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| 193 | ResolvExpr::findVoidExpression( expr, indexer ); |
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[1dcd9554] | 194 | |
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[ba3706f] | 195 | return new ExprStmt( expr ); |
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[9f5ecf5] | 196 | } |
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| 197 | |
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| 198 | Expression * safeCond( Expression * expr, bool ifnull = true ) { |
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| 199 | if( expr ) return expr; |
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| 200 | |
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| 201 | return new ConstantExpr( Constant::from_bool( ifnull ) ); |
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| 202 | } |
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[310e5b7] | 203 | |
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| 204 | VariableExpr * extractVariable( Expression * func ) { |
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| 205 | if( VariableExpr * var = dynamic_cast< VariableExpr * >( func ) ) { |
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| 206 | return var; |
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| 207 | } |
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| 208 | |
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| 209 | CastExpr * cast = strict_dynamic_cast< CastExpr * >( func ); |
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| 210 | return strict_dynamic_cast< VariableExpr * >( cast->arg ); |
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| 211 | } |
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| 212 | |
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[8f98b78] | 213 | Expression * detectIsDtor( Expression * func ) { |
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[310e5b7] | 214 | VariableExpr * typed_func = extractVariable( func ); |
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| 215 | bool is_dtor = InitTweak::isDestructor( typed_func->var ); |
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| 216 | return new ConstantExpr( Constant::from_bool( is_dtor ) ); |
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| 217 | } |
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[9f5ecf5] | 218 | }; |
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| 219 | |
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| 220 | |
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| 221 | //============================================================================================= |
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| 222 | // Generate waitfor implementation |
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| 223 | //============================================================================================= |
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| 224 | |
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| 225 | void GenerateWaitForPass::premutate( FunctionDecl * decl) { |
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[310e5b7] | 226 | if( decl->name != "__waitfor_internal" ) return; |
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[9f5ecf5] | 227 | |
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| 228 | decl_waitfor = decl; |
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| 229 | } |
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| 230 | |
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| 231 | void GenerateWaitForPass::premutate( StructDecl * decl ) { |
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| 232 | if( ! decl->body ) return; |
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| 233 | |
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| 234 | if( decl->name == "__acceptable_t" ) { |
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| 235 | assert( !decl_acceptable ); |
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| 236 | decl_acceptable = decl; |
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| 237 | } |
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[aaa4f93] | 238 | else if( decl->name == "__waitfor_mask_t" ) { |
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| 239 | assert( !decl_mask ); |
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| 240 | decl_mask = decl; |
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| 241 | } |
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[9f5ecf5] | 242 | else if( decl->name == "monitor_desc" ) { |
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| 243 | assert( !decl_monitor ); |
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| 244 | decl_monitor = decl; |
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| 245 | } |
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| 246 | } |
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| 247 | |
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| 248 | Statement * GenerateWaitForPass::postmutate( WaitForStmt * waitfor ) { |
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[d55d7a6] | 249 | if( !decl_monitor || !decl_acceptable || !decl_mask ) |
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[a16764a6] | 250 | SemanticError( waitfor, "waitfor keyword requires monitors to be in scope, add #include <monitor>" ); |
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[9f5ecf5] | 251 | |
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[ba3706f] | 252 | CompoundStmt * stmt = new CompoundStmt(); |
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[9f5ecf5] | 253 | |
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| 254 | ObjectDecl * acceptables = declare( waitfor->clauses.size(), stmt ); |
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[aaa4f93] | 255 | ObjectDecl * flag = declareFlag( stmt ); |
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| 256 | Statement * setter = makeSetter( flag ); |
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[9f5ecf5] | 257 | |
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| 258 | int index = 0; |
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| 259 | for( auto & clause : waitfor->clauses ) { |
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[aaa4f93] | 260 | init( acceptables, index, clause, setter, stmt ); |
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[9f5ecf5] | 261 | |
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| 262 | index++; |
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| 263 | } |
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| 264 | |
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| 265 | Expression * timeout = init_timeout( |
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| 266 | waitfor->timeout.time, |
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| 267 | waitfor->timeout.condition, |
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| 268 | waitfor->orelse .statement, |
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| 269 | waitfor->orelse .condition, |
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[aaa4f93] | 270 | setter, |
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[9f5ecf5] | 271 | stmt |
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| 272 | ); |
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| 273 | |
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[ba3706f] | 274 | CompoundStmt * compound = new CompoundStmt(); |
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[aaa4f93] | 275 | stmt->push_back( new IfStmt( |
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| 276 | safeCond( new VariableExpr( flag ) ), |
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| 277 | compound, |
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| 278 | nullptr |
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| 279 | )); |
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| 280 | |
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| 281 | Expression * result = call( waitfor->clauses.size(), acceptables, timeout, compound ); |
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[9f5ecf5] | 282 | |
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[aaa4f93] | 283 | choose( waitfor, result, compound ); |
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[9f5ecf5] | 284 | |
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| 285 | return stmt; |
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| 286 | } |
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| 287 | |
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| 288 | ObjectDecl * GenerateWaitForPass::declare( unsigned long count, CompoundStmt * stmt ) |
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| 289 | { |
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[1dcd9554] | 290 | ObjectDecl * acceptables = ObjectDecl::newObject( |
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[9f5ecf5] | 291 | namer_acc.newName(), |
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| 292 | new ArrayType( |
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| 293 | noQualifiers, |
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| 294 | new StructInstType( |
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| 295 | noQualifiers, |
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| 296 | decl_acceptable |
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| 297 | ), |
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| 298 | new ConstantExpr( Constant::from_ulong( count ) ), |
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| 299 | false, |
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| 300 | false |
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| 301 | ), |
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| 302 | nullptr |
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| 303 | ); |
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| 304 | |
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[ba3706f] | 305 | stmt->push_back( new DeclStmt( acceptables) ); |
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[9f5ecf5] | 306 | |
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[08da53d] | 307 | Expression * set = new UntypedExpr( |
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[aaa4f93] | 308 | new NameExpr( "__builtin_memset" ), |
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| 309 | { |
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| 310 | new VariableExpr( acceptables ), |
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| 311 | new ConstantExpr( Constant::from_int( 0 ) ), |
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| 312 | new SizeofExpr( new VariableExpr( acceptables ) ) |
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| 313 | } |
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| 314 | ); |
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| 315 | |
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[08da53d] | 316 | ResolvExpr::findVoidExpression( set, indexer ); |
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[aaa4f93] | 317 | |
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[ba3706f] | 318 | stmt->push_back( new ExprStmt( set ) ); |
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[aaa4f93] | 319 | |
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[9f5ecf5] | 320 | return acceptables; |
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| 321 | } |
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| 322 | |
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[aaa4f93] | 323 | ObjectDecl * GenerateWaitForPass::declareFlag( CompoundStmt * stmt ) { |
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| 324 | ObjectDecl * flag = ObjectDecl::newObject( |
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| 325 | namer_flg.newName(), |
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| 326 | new BasicType( |
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| 327 | noQualifiers, |
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| 328 | BasicType::Bool |
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| 329 | ), |
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| 330 | new SingleInit( new ConstantExpr( Constant::from_ulong( 0 ) ) ) |
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| 331 | ); |
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| 332 | |
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[ba3706f] | 333 | stmt->push_back( new DeclStmt( flag) ); |
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[aaa4f93] | 334 | |
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| 335 | return flag; |
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| 336 | } |
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| 337 | |
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| 338 | Statement * GenerateWaitForPass::makeSetter( ObjectDecl * flag ) { |
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[08da53d] | 339 | Expression * expr = new UntypedExpr( |
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[aaa4f93] | 340 | new NameExpr( "?=?" ), |
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| 341 | { |
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| 342 | new VariableExpr( flag ), |
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| 343 | new ConstantExpr( Constant::from_ulong( 1 ) ) |
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| 344 | } |
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| 345 | ); |
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| 346 | |
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[08da53d] | 347 | ResolvExpr::findVoidExpression( expr, indexer ); |
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[aaa4f93] | 348 | |
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[ba3706f] | 349 | return new ExprStmt( expr ); |
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[aaa4f93] | 350 | } |
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| 351 | |
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[9f5ecf5] | 352 | ObjectDecl * GenerateWaitForPass::declMon( WaitForStmt::Clause & clause, CompoundStmt * stmt ) { |
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| 353 | |
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[1dcd9554] | 354 | ObjectDecl * mon = ObjectDecl::newObject( |
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[9f5ecf5] | 355 | namer_mon.newName(), |
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| 356 | new ArrayType( |
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| 357 | noQualifiers, |
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[8f98b78] | 358 | new PointerType( |
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[9f5ecf5] | 359 | noQualifiers, |
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[8f98b78] | 360 | new StructInstType( |
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| 361 | noQualifiers, |
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| 362 | decl_monitor |
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| 363 | ) |
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[9f5ecf5] | 364 | ), |
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| 365 | new ConstantExpr( Constant::from_ulong( clause.target.arguments.size() ) ), |
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| 366 | false, |
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| 367 | false |
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| 368 | ), |
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| 369 | new ListInit( |
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| 370 | map_range < std::list<Initializer*> > ( clause.target.arguments, [this](Expression * expr ){ |
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[08da53d] | 371 | Expression * init = new CastExpr( |
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[8f98b78] | 372 | new UntypedExpr( |
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| 373 | new NameExpr( "get_monitor" ), |
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| 374 | { expr } |
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| 375 | ), |
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| 376 | new PointerType( |
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| 377 | noQualifiers, |
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| 378 | new StructInstType( |
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| 379 | noQualifiers, |
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| 380 | decl_monitor |
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| 381 | ) |
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| 382 | ) |
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| 383 | ); |
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| 384 | |
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[08da53d] | 385 | ResolvExpr::findSingleExpression( init, indexer ); |
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[8f98b78] | 386 | return new SingleInit( init ); |
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[9f5ecf5] | 387 | }) |
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| 388 | ) |
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| 389 | ); |
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| 390 | |
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[ba3706f] | 391 | stmt->push_back( new DeclStmt( mon) ); |
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[9f5ecf5] | 392 | |
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| 393 | return mon; |
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| 394 | } |
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| 395 | |
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[aaa4f93] | 396 | void GenerateWaitForPass::init( ObjectDecl * acceptables, int index, WaitForStmt::Clause & clause, Statement * setter, CompoundStmt * stmt ) { |
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[9f5ecf5] | 397 | |
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| 398 | ObjectDecl * monitors = declMon( clause, stmt ); |
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| 399 | |
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[1dcd9554] | 400 | Type * fptr_t = new PointerType( noQualifiers, new FunctionType( noQualifiers, true ) ); |
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| 401 | |
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[9f5ecf5] | 402 | stmt->push_back( new IfStmt( |
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| 403 | safeCond( clause.condition ), |
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[aaa4f93] | 404 | new CompoundStmt({ |
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| 405 | makeAccStatement( acceptables, index, "is_dtor", detectIsDtor( clause.target.function ) , indexer ), |
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| 406 | makeAccStatement( acceptables, index, "func" , new CastExpr( clause.target.function, fptr_t ) , indexer ), |
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[0cf5b79] | 407 | makeAccStatement( acceptables, index, "data" , new VariableExpr( monitors ) , indexer ), |
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[aaa4f93] | 408 | makeAccStatement( acceptables, index, "size" , new ConstantExpr( Constant::from_ulong( clause.target.arguments.size() ) ), indexer ), |
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| 409 | setter->clone() |
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| 410 | }), |
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[9f5ecf5] | 411 | nullptr |
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| 412 | )); |
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| 413 | |
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| 414 | clause.target.function = nullptr; |
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| 415 | clause.target.arguments.empty(); |
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| 416 | clause.condition = nullptr; |
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| 417 | } |
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| 418 | |
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| 419 | Expression * GenerateWaitForPass::init_timeout( |
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| 420 | Expression *& time, |
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| 421 | Expression *& time_cond, |
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| 422 | bool has_else, |
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| 423 | Expression *& else_cond, |
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[aaa4f93] | 424 | Statement * setter, |
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[9f5ecf5] | 425 | CompoundStmt * stmt |
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| 426 | ) { |
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[1dcd9554] | 427 | ObjectDecl * timeout = ObjectDecl::newObject( |
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[9f5ecf5] | 428 | namer_tim.newName(), |
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| 429 | new BasicType( |
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| 430 | noQualifiers, |
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| 431 | BasicType::LongLongUnsignedInt |
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| 432 | ), |
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| 433 | new SingleInit( |
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| 434 | new ConstantExpr( Constant::from_int( -1 ) ) |
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| 435 | ) |
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| 436 | ); |
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| 437 | |
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[ba3706f] | 438 | stmt->push_back( new DeclStmt( timeout ) ); |
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[9f5ecf5] | 439 | |
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| 440 | if( time ) { |
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| 441 | stmt->push_back( new IfStmt( |
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[1dcd9554] | 442 | safeCond( time_cond ), |
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[aaa4f93] | 443 | new CompoundStmt({ |
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| 444 | new ExprStmt( |
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| 445 | makeOpAssign( |
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| 446 | new VariableExpr( timeout ), |
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| 447 | time |
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| 448 | ) |
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| 449 | ), |
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| 450 | setter->clone() |
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| 451 | }), |
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[9f5ecf5] | 452 | nullptr |
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| 453 | )); |
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| 454 | |
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| 455 | time = time_cond = nullptr; |
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| 456 | } |
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| 457 | |
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| 458 | if( has_else ) { |
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| 459 | stmt->push_back( new IfStmt( |
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| 460 | safeCond( else_cond ), |
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[aaa4f93] | 461 | new CompoundStmt({ |
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| 462 | new ExprStmt( |
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| 463 | makeOpAssign( |
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| 464 | new VariableExpr( timeout ), |
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| 465 | new ConstantExpr( Constant::from_ulong( 0 ) ) |
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| 466 | ) |
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| 467 | ), |
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| 468 | setter->clone() |
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| 469 | }), |
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[9f5ecf5] | 470 | nullptr |
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| 471 | )); |
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| 472 | |
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| 473 | else_cond = nullptr; |
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| 474 | } |
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| 475 | |
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| 476 | return new VariableExpr( timeout ); |
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| 477 | } |
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[1dcd9554] | 478 | |
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| 479 | Expression * GenerateWaitForPass::call( |
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| 480 | size_t count, |
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| 481 | ObjectDecl * acceptables, |
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| 482 | Expression * timeout, |
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| 483 | CompoundStmt * stmt |
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| 484 | ) { |
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[aaa4f93] | 485 | ObjectDecl * index = ObjectDecl::newObject( |
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| 486 | namer_idx.newName(), |
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[1dcd9554] | 487 | new BasicType( |
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| 488 | noQualifiers, |
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[aaa4f93] | 489 | BasicType::ShortSignedInt |
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[1dcd9554] | 490 | ), |
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| 491 | new SingleInit( |
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[aaa4f93] | 492 | new ConstantExpr( Constant::from_int( -1 ) ) |
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[1dcd9554] | 493 | ) |
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| 494 | ); |
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| 495 | |
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[ba3706f] | 496 | stmt->push_back( new DeclStmt( index ) ); |
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[aaa4f93] | 497 | |
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| 498 | ObjectDecl * mask = ObjectDecl::newObject( |
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| 499 | namer_msk.newName(), |
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| 500 | new StructInstType( |
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| 501 | noQualifiers, |
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| 502 | decl_mask |
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| 503 | ), |
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| 504 | new ListInit({ |
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| 505 | new SingleInit( new AddressExpr( new VariableExpr( index ) ) ), |
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[d2d50d7] | 506 | new ListInit({ |
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| 507 | new SingleInit( new VariableExpr( acceptables ) ), |
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| 508 | new SingleInit( new ConstantExpr( Constant::from_ulong( count ) ) ) |
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| 509 | }) |
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[aaa4f93] | 510 | }) |
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| 511 | ); |
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| 512 | |
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[ba3706f] | 513 | stmt->push_back( new DeclStmt( mask ) ); |
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[aaa4f93] | 514 | |
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| 515 | stmt->push_back( new ExprStmt( |
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| 516 | new ApplicationExpr( |
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| 517 | VariableExpr::functionPointer( decl_waitfor ), |
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| 518 | { |
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| 519 | new CastExpr( |
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| 520 | new VariableExpr( mask ), |
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| 521 | new ReferenceType( |
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| 522 | noQualifiers, |
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| 523 | new StructInstType( |
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| 524 | noQualifiers, |
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| 525 | decl_mask |
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| 526 | ) |
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| 527 | ) |
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| 528 | ), |
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| 529 | timeout |
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| 530 | } |
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| 531 | ) |
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| 532 | )); |
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[1dcd9554] | 533 | |
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[aaa4f93] | 534 | return new VariableExpr( index ); |
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[1dcd9554] | 535 | } |
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| 536 | |
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| 537 | void GenerateWaitForPass::choose( |
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| 538 | WaitForStmt * waitfor, |
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| 539 | Expression * result, |
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| 540 | CompoundStmt * stmt |
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| 541 | ) { |
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| 542 | SwitchStmt * swtch = new SwitchStmt( |
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| 543 | result, |
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| 544 | std::list<Statement *>() |
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| 545 | ); |
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| 546 | |
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| 547 | unsigned long i = 0; |
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| 548 | for( auto & clause : waitfor->clauses ) { |
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| 549 | swtch->statements.push_back( |
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| 550 | new CaseStmt( |
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| 551 | new ConstantExpr( Constant::from_ulong( i++ ) ), |
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| 552 | { |
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| 553 | clause.statement, |
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| 554 | new BranchStmt( |
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| 555 | "", |
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| 556 | BranchStmt::Break |
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| 557 | ) |
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| 558 | } |
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| 559 | ) |
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| 560 | ); |
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| 561 | } |
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| 562 | |
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| 563 | if(waitfor->timeout.statement) { |
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| 564 | swtch->statements.push_back( |
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| 565 | new CaseStmt( |
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[b18830e] | 566 | new ConstantExpr( Constant::from_int( -2 ) ), |
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[1dcd9554] | 567 | { |
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| 568 | waitfor->timeout.statement, |
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| 569 | new BranchStmt( |
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| 570 | "", |
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| 571 | BranchStmt::Break |
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| 572 | ) |
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| 573 | } |
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| 574 | ) |
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| 575 | ); |
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| 576 | } |
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| 577 | |
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| 578 | if(waitfor->orelse.statement) { |
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| 579 | swtch->statements.push_back( |
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| 580 | new CaseStmt( |
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[b18830e] | 581 | new ConstantExpr( Constant::from_int( -1 ) ), |
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[1dcd9554] | 582 | { |
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| 583 | waitfor->orelse.statement, |
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| 584 | new BranchStmt( |
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| 585 | "", |
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| 586 | BranchStmt::Break |
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| 587 | ) |
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| 588 | } |
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| 589 | ) |
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| 590 | ); |
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| 591 | } |
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| 592 | |
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| 593 | stmt->push_back( swtch ); |
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| 594 | } |
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[9f5ecf5] | 595 | }; |
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| 596 | |
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| 597 | // Local Variables: // |
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| 598 | // mode: c // |
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| 599 | // tab-width: 4 // |
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[08da53d] | 600 | // End: // |
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