[c8f5f7d] | 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 | // WaitforNew.cpp -- Expand waitfor clauses into code. |
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| 8 | // |
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| 9 | // Author : Andrew Beach |
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| 10 | // Created On : Fri May 27 10:31:00 2022 |
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| 11 | // Last Modified By : Andrew Beach |
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| 12 | // Last Modified On : Tue Jun 13 13:30:00 2022 |
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| 13 | // Update Count : 0 |
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| 14 | // |
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| 15 | |
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| 16 | #include "Waitfor.h" |
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| 17 | |
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| 18 | #include <string> |
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| 19 | |
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| 20 | #include "AST/Pass.hpp" |
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| 21 | #include "Common/UniqueName.h" |
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| 22 | #include "InitTweak/InitTweak.h" |
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| 23 | #include "ResolvExpr/Resolver.h" |
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| 24 | |
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| 25 | #include "AST/Print.hpp" |
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| 26 | |
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| 27 | using namespace std::string_literals; |
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| 28 | using ResolvExpr::ResolveContext; |
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| 29 | |
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| 30 | /* So this is what this file dones: |
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| 31 | |
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| 32 | void f(int i, float f, A & mutex b, struct foo * ); |
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| 33 | void f(int ); |
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| 34 | |
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| 35 | ...{ |
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| 36 | when ( a < 1 ) waitfor( f : a ) { fee(); } |
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| 37 | or timeout( getWaitTime() ) { fy(); } |
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| 38 | or waitfor( g : a ) { foe(); } |
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| 39 | or waitfor( ^?{} : a ) { break; } |
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| 40 | or waitfor( ^?{} ) { break; } |
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| 41 | or when ( a < 1 ) else { fum(); } |
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| 42 | }... |
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| 43 | |
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| 44 | || |
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| 45 | || |
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| 46 | \||/ |
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| 47 | \/ |
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| 48 | |
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| 49 | ...{ |
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| 50 | { |
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| 51 | __acceptable_t __acceptables_#[4 <num-clauses>]; |
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| 52 | bool __do_run_# = false; |
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| 53 | |
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| 54 | monitor$ * __monitors_#[1 <num-monitors>] = { a }; |
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| 55 | if ( a < 1) { |
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| 56 | void (*__function_#)() = <casts> f; |
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| 57 | __acceptables_#[0].is_dtor = false; |
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| 58 | __acceptables_#[0].func = __function_#; |
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| 59 | __acceptables_#[0].data = __monitors_#; |
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| 60 | __acceptables_#[0].size = 1; |
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| 61 | __do_run_# = true; |
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| 62 | } |
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| 63 | |
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| 64 | // Remaining waitfor clauses go here. |
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| 65 | |
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| 66 | long long unsigned int __timeout_# = -1; |
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| 67 | if ( true ) { |
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| 68 | __timeout_# = getWaitTime(); |
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| 69 | __do_run_# = true; |
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| 70 | } |
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| 71 | |
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| 72 | if ( a < 1 ) { |
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| 73 | __timeout_# = 0 |
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| 74 | __do_run_# = true; |
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| 75 | } |
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| 76 | |
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| 77 | short int __index_# = -1; |
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| 78 | __waitfor_mask_t __mask_# = {&__index_#, {__acceptables_#, ?}}; |
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| 79 | __waitfor_internal((__waitfor_mask_t&)__mask_#, __timeout_#); |
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| 80 | |
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| 81 | switch (__index_#) { |
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| 82 | case 0: |
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| 83 | { { fee(); } break; } |
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| 84 | case 1: |
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| 85 | { { foe(); } break; } |
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| 86 | case 2: |
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| 87 | { <modified-break> break; } |
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| 88 | case 3: |
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| 89 | { <modified-break> break; } |
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| 90 | case -2: |
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| 91 | { { fy(); } break; } |
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| 92 | case -1: |
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| 93 | { { foe(); } break; } |
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| 94 | } |
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| 95 | } |
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| 96 | }... |
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| 97 | */ |
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| 98 | |
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| 99 | namespace Concurrency { |
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| 100 | |
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| 101 | namespace { |
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| 102 | |
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| 103 | class GenerateWaitForCore : |
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| 104 | public ast::WithSymbolTable, public ast::WithConstTranslationUnit { |
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| 105 | const ast::FunctionDecl * decl_waitfor = nullptr; |
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| 106 | const ast::StructDecl * decl_mask = nullptr; |
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| 107 | const ast::StructDecl * decl_acceptable = nullptr; |
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| 108 | const ast::StructDecl * decl_monitor = nullptr; |
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| 109 | |
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| 110 | UniqueName namer_acc = "__acceptables_"s; |
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| 111 | UniqueName namer_idx = "__index_"s; |
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| 112 | UniqueName namer_flg = "__do_run_"s; |
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| 113 | UniqueName namer_msk = "__mask_"s; |
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| 114 | UniqueName namer_mon = "__monitors_"s; |
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| 115 | UniqueName namer_tim = "__timeout_"s; |
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| 116 | UniqueName namer_fun = "__function_"s; |
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| 117 | |
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| 118 | ast::ObjectDecl * declareAcceptables( ast::CompoundStmt * out, |
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| 119 | const CodeLocation & location, unsigned long numClauses ); |
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| 120 | ast::ObjectDecl * declareFlag( |
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| 121 | ast::CompoundStmt * out, const CodeLocation & location ); |
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| 122 | ast::ExprStmt * makeSetter( |
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| 123 | const CodeLocation & location, ast::ObjectDecl * flag ); |
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| 124 | ast::ObjectDecl * declMonitors( |
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| 125 | ast::CompoundStmt * out, const ast::WaitForClause * clause ); |
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| 126 | void init_clause( ast::CompoundStmt * out, ast::ObjectDecl * acceptables, |
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| 127 | int index, const ast::WaitForClause * clause, ast::Stmt * setter ); |
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| 128 | ast::Expr * init_timeout( |
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| 129 | ast::CompoundStmt * out, const CodeLocation & topLocation, |
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| 130 | const ast::Expr * timeout_time, const ast::Expr * timeout_cond, |
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| 131 | const ast::Stmt * else_stmt, const ast::Expr * else_cond, |
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| 132 | const ast::Stmt * setter ); |
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| 133 | ast::Expr * call( |
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| 134 | ast::CompoundStmt * out, const CodeLocation & location, |
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| 135 | size_t numClauses, ast::ObjectDecl * acceptables, |
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| 136 | ast::Expr * timeout ); |
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| 137 | public: |
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| 138 | void previsit( const ast::FunctionDecl * decl ); |
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| 139 | void previsit( const ast::StructDecl * decl ); |
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| 140 | ast::Stmt * postvisit( const ast::WaitForStmt * stmt ); |
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| 141 | }; |
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| 142 | |
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| 143 | ast::Expr * makeOpIndex( const CodeLocation & location, |
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| 144 | const ast::DeclWithType * array, unsigned long index ) { |
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| 145 | return new ast::UntypedExpr( location, |
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| 146 | new ast::NameExpr( location, "?[?]" ), |
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| 147 | { |
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| 148 | new ast::VariableExpr( location, array ), |
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| 149 | ast::ConstantExpr::from_ulong( location, index ), |
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| 150 | } |
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| 151 | ); |
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| 152 | } |
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| 153 | |
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| 154 | ast::Expr * makeOpAssign( const CodeLocation & location, |
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| 155 | const ast::Expr * lhs, const ast::Expr * rhs ) { |
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| 156 | return new ast::UntypedExpr( location, |
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| 157 | new ast::NameExpr( location, "?=?" ), |
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| 158 | { lhs, rhs } |
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| 159 | ); |
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| 160 | } |
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| 161 | |
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| 162 | ast::Expr * makeOpMember( const CodeLocation & location, |
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| 163 | const std::string & mem, const ast::Expr * sue ) { |
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| 164 | return new ast::UntypedMemberExpr( location, |
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| 165 | new ast::NameExpr( location, mem ), |
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| 166 | sue |
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| 167 | ); |
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| 168 | } |
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| 169 | |
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| 170 | ast::Stmt * makeAccStmt( |
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| 171 | const CodeLocation & location, ast::DeclWithType * object, |
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| 172 | unsigned long index, const std::string & member, |
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| 173 | const ast::Expr * value, const ResolveContext & context |
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| 174 | ) { |
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| 175 | ast::Expr * expr = makeOpAssign( location, |
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| 176 | makeOpMember( location, |
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| 177 | member, |
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| 178 | makeOpIndex( location, |
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| 179 | object, |
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| 180 | index |
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| 181 | ) |
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| 182 | ), |
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| 183 | value |
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| 184 | ); |
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| 185 | |
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| 186 | auto result = ResolvExpr::findVoidExpression( expr, context ); |
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| 187 | return new ast::ExprStmt( location, result.get() ); |
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| 188 | } |
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| 189 | |
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| 190 | const ast::Stmt * maybeCond( const CodeLocation & location, |
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| 191 | const ast::Expr * cond, std::list<ast::ptr<ast::Stmt>> && stmts ) { |
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| 192 | ast::Stmt * block = new ast::CompoundStmt( location, std::move( stmts ) ); |
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| 193 | return (cond) ? new ast::IfStmt( location, cond, block ) : block; |
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| 194 | } |
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| 195 | |
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| 196 | const ast::VariableExpr * extractVariable( const ast::Expr * func ) { |
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| 197 | if ( auto var = dynamic_cast<const ast::VariableExpr *>( func ) ) { |
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| 198 | return var; |
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| 199 | } |
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| 200 | auto cast = strict_dynamic_cast<const ast::CastExpr *>( func ); |
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| 201 | return cast->arg.strict_as<ast::VariableExpr>(); |
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| 202 | } |
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| 203 | |
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| 204 | const ast::Expr * detectIsDtor( |
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| 205 | const CodeLocation & location, const ast::Expr * func ) { |
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| 206 | const ast::VariableExpr * typed_func = extractVariable( func ); |
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| 207 | bool is_dtor = InitTweak::isDestructor( |
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| 208 | typed_func->var.strict_as<ast::FunctionDecl>() ); |
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| 209 | return ast::ConstantExpr::from_bool( location, is_dtor ); |
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| 210 | } |
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| 211 | |
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| 212 | ast::ObjectDecl * GenerateWaitForCore::declareAcceptables( |
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| 213 | ast::CompoundStmt * out, |
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| 214 | const CodeLocation & location, unsigned long numClauses ) { |
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| 215 | ast::ObjectDecl * acceptables = new ast::ObjectDecl( location, |
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| 216 | namer_acc.newName(), |
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| 217 | new ast::ArrayType( |
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| 218 | new ast::StructInstType( decl_acceptable ), |
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| 219 | ast::ConstantExpr::from_ulong( location, numClauses ), |
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| 220 | ast::FixedLen, |
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| 221 | ast::DynamicDim |
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| 222 | ) |
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| 223 | ); |
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| 224 | out->push_back( new ast::DeclStmt( location, acceptables ) ); |
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| 225 | |
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| 226 | ast::Expr * set = new ast::UntypedExpr( location, |
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| 227 | new ast::NameExpr( location, "__builtin_memset" ), |
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| 228 | { |
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| 229 | new ast::VariableExpr( location, acceptables ), |
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| 230 | ast::ConstantExpr::from_int( location, 0 ), |
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| 231 | new ast::SizeofExpr( location, |
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| 232 | new ast::VariableExpr( location, acceptables ) ), |
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| 233 | } |
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| 234 | ); |
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| 235 | ResolveContext context{ symtab, transUnit().global }; |
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| 236 | auto result = ResolvExpr::findVoidExpression( set, context ); |
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| 237 | out->push_back( new ast::ExprStmt( location, result.get() ) ); |
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| 238 | |
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| 239 | return acceptables; |
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| 240 | } |
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| 241 | |
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| 242 | ast::ObjectDecl * GenerateWaitForCore::declareFlag( |
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| 243 | ast::CompoundStmt * out, const CodeLocation & location ) { |
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| 244 | ast::ObjectDecl * flag = new ast::ObjectDecl( location, |
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| 245 | namer_flg.newName(), |
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| 246 | new ast::BasicType( ast::BasicType::Bool ), |
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| 247 | new ast::SingleInit( location, |
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| 248 | ast::ConstantExpr::from_ulong( location, 0 ) |
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| 249 | ) |
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| 250 | ); |
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| 251 | out->push_back( new ast::DeclStmt( location, flag ) ); |
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| 252 | return flag; |
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| 253 | } |
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| 254 | |
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| 255 | ast::ExprStmt * GenerateWaitForCore::makeSetter( |
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| 256 | const CodeLocation & location, ast::ObjectDecl * flag ) { |
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| 257 | ast::Expr * expr = new ast::UntypedExpr( location, |
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| 258 | new ast::NameExpr( location, "?=?" ), |
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| 259 | { |
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| 260 | new ast::VariableExpr( location, flag ), |
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| 261 | ast::ConstantExpr::from_ulong( location, 1 ), |
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| 262 | } |
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| 263 | ); |
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| 264 | ResolveContext context{ symtab, transUnit().global }; |
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| 265 | auto result = ResolvExpr::findVoidExpression( expr, context ); |
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| 266 | return new ast::ExprStmt( location, result.get() ); |
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| 267 | } |
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| 268 | |
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| 269 | ast::ObjectDecl * GenerateWaitForCore::declMonitors( |
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| 270 | ast::CompoundStmt * out, |
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| 271 | const ast::WaitForClause * clause ) { |
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| 272 | const CodeLocation & location = clause->location; |
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| 273 | ast::ObjectDecl * monitor = new ast::ObjectDecl( location, |
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| 274 | namer_mon.newName(), |
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| 275 | new ast::ArrayType( |
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| 276 | new ast::PointerType( |
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| 277 | new ast::StructInstType( decl_monitor ) |
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| 278 | ), |
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| 279 | ast::ConstantExpr::from_ulong( location, clause->target_args.size() ), |
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| 280 | ast::FixedLen, |
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| 281 | ast::DynamicDim |
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| 282 | ), |
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| 283 | new ast::ListInit( location, |
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| 284 | map_range<std::vector<ast::ptr<ast::Init>>>( |
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| 285 | clause->target_args, |
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| 286 | []( const ast::Expr * expr ){ |
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| 287 | return new ast::SingleInit( expr->location, expr ); } |
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| 288 | ) |
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| 289 | ) |
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| 290 | ); |
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| 291 | out->push_back( new ast::DeclStmt( location, monitor ) ); |
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| 292 | return monitor; |
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| 293 | } |
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| 294 | |
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| 295 | void GenerateWaitForCore::init_clause( |
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| 296 | ast::CompoundStmt * out, |
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| 297 | ast::ObjectDecl * acceptables, |
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| 298 | int index, |
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| 299 | const ast::WaitForClause * clause, |
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| 300 | ast::Stmt * setter ) { |
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| 301 | const CodeLocation & location = clause->location; |
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| 302 | const ast::ObjectDecl * monitors = declMonitors( out, clause ); |
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| 303 | ast::Type * fptr_t = new ast::PointerType( |
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| 304 | new ast::FunctionType( ast::VariableArgs ) ); |
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| 305 | |
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| 306 | const ast::VariableExpr * variableExpr = |
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| 307 | clause->target_func.as<ast::VariableExpr>(); |
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| 308 | ast::Expr * castExpr = new ast::CastExpr( |
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| 309 | location, |
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| 310 | new ast::CastExpr( |
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| 311 | location, |
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| 312 | clause->target_func, |
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| 313 | ast::deepCopy( variableExpr->result.get() ), |
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| 314 | ast::GeneratedCast ), |
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| 315 | fptr_t, |
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| 316 | ast::GeneratedCast ); |
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| 317 | |
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| 318 | ast::ObjectDecl * funcDecl = new ast::ObjectDecl( location, |
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| 319 | namer_fun.newName(), |
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| 320 | ast::deepCopy( fptr_t ), |
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| 321 | new ast::SingleInit( location, castExpr ) |
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| 322 | ); |
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| 323 | ast::Expr * funcExpr = new ast::VariableExpr( location, funcDecl ); |
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| 324 | out->push_back( new ast::DeclStmt( location, funcDecl ) ); |
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| 325 | |
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| 326 | ResolveContext context{ symtab, transUnit().global }; |
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| 327 | out->push_back( maybeCond( location, clause->cond.get(), { |
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| 328 | makeAccStmt( location, acceptables, index, "is_dtor", |
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| 329 | detectIsDtor( location, clause->target_func ), context ), |
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| 330 | makeAccStmt( location, acceptables, index, "func", |
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| 331 | funcExpr, context ), |
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| 332 | makeAccStmt( location, acceptables, index, "data", |
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| 333 | new ast::VariableExpr( location, monitors ), context ), |
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| 334 | makeAccStmt( location, acceptables, index, "size", |
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| 335 | ast::ConstantExpr::from_ulong( location, |
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| 336 | clause->target_args.size() ), context ), |
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| 337 | ast::deepCopy( setter ), |
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| 338 | } ) ); |
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| 339 | } |
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| 340 | |
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| 341 | ast::Expr * GenerateWaitForCore::init_timeout( |
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| 342 | ast::CompoundStmt * out, |
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| 343 | const CodeLocation & topLocation, |
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| 344 | const ast::Expr * timeout_time, |
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| 345 | const ast::Expr * timeout_cond, |
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| 346 | const ast::Stmt * else_stmt, |
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| 347 | const ast::Expr * else_cond, |
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| 348 | const ast::Stmt * setter ) { |
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| 349 | ast::ObjectDecl * timeout = new ast::ObjectDecl( topLocation, |
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| 350 | namer_tim.newName(), |
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| 351 | new ast::BasicType( ast::BasicType::LongLongUnsignedInt ), |
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| 352 | new ast::SingleInit( topLocation, |
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| 353 | ast::ConstantExpr::from_int( topLocation, -1 ) |
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| 354 | ) |
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| 355 | ); |
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| 356 | out->push_back( new ast::DeclStmt( topLocation, timeout ) ); |
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| 357 | |
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| 358 | if ( timeout_time ) { |
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| 359 | const CodeLocation & location = timeout_time->location; |
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| 360 | out->push_back( maybeCond( location, timeout_cond, { |
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| 361 | new ast::ExprStmt( location, |
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| 362 | makeOpAssign( |
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| 363 | location, |
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| 364 | new ast::VariableExpr( location, timeout ), |
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| 365 | timeout_time |
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| 366 | ) |
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| 367 | ), |
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| 368 | ast::deepCopy( setter ), |
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| 369 | } ) ); |
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| 370 | } |
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| 371 | |
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| 372 | // We only care about the else_stmt's presence and location. |
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| 373 | if ( else_stmt ) { |
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| 374 | const CodeLocation & location = else_stmt->location; |
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| 375 | out->push_back( maybeCond( location, else_cond, { |
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| 376 | new ast::ExprStmt( location, |
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| 377 | makeOpAssign( |
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| 378 | location, |
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| 379 | new ast::VariableExpr( location, timeout ), |
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| 380 | ast::ConstantExpr::from_ulong( location, 0 ) |
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| 381 | ) |
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| 382 | ), |
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| 383 | ast::deepCopy( setter ), |
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| 384 | } ) ); |
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| 385 | } |
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| 386 | |
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| 387 | return new ast::VariableExpr( topLocation, timeout ); |
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| 388 | } |
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| 389 | |
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| 390 | ast::Expr * GenerateWaitForCore::call( |
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| 391 | ast::CompoundStmt * out, |
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| 392 | const CodeLocation & location, |
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| 393 | size_t numClauses, |
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| 394 | ast::ObjectDecl * acceptables, |
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| 395 | ast::Expr * timeout |
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| 396 | ) { |
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| 397 | ast::ObjectDecl * index = new ast::ObjectDecl( location, |
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| 398 | namer_idx.newName(), |
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| 399 | new ast::BasicType( ast::BasicType::ShortSignedInt ), |
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| 400 | new ast::SingleInit( location, |
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| 401 | ast::ConstantExpr::from_int( location, -1 ) |
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| 402 | ) |
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| 403 | ); |
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| 404 | out->push_back( new ast::DeclStmt( location, index ) ); |
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| 405 | |
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| 406 | ast::ObjectDecl * mask = new ast::ObjectDecl( location, |
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| 407 | namer_msk.newName(), |
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| 408 | new ast::StructInstType( decl_mask ), |
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| 409 | new ast::ListInit( location, { |
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| 410 | new ast::SingleInit( location, |
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| 411 | new ast::AddressExpr( location, |
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| 412 | new ast::VariableExpr( location, index ) |
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| 413 | ) |
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| 414 | ), |
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| 415 | new ast::ListInit( location, { |
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| 416 | new ast::SingleInit( location, |
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| 417 | new ast::VariableExpr( location, acceptables ) |
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| 418 | ), |
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| 419 | new ast::SingleInit( location, |
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| 420 | ast::ConstantExpr::from_ulong( location, numClauses ) |
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| 421 | ), |
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| 422 | }), |
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| 423 | }) |
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| 424 | ); |
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| 425 | out->push_back( new ast::DeclStmt( location, mask ) ); |
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| 426 | |
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| 427 | ast::ApplicationExpr * waitforMask = new ast::ApplicationExpr( location, |
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| 428 | ast::VariableExpr::functionPointer( location, decl_waitfor ), |
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| 429 | { |
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| 430 | new ast::CastExpr( |
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| 431 | new ast::VariableExpr( location, mask ), |
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| 432 | new ast::ReferenceType( |
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| 433 | new ast::StructInstType( decl_mask ) |
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| 434 | ) |
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| 435 | ), |
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| 436 | timeout |
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| 437 | } |
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| 438 | ); |
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| 439 | out->push_back( new ast::ExprStmt( location, waitforMask ) ); |
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| 440 | |
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| 441 | return new ast::VariableExpr( location, index ); |
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| 442 | } |
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| 443 | |
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| 444 | ast::Stmt * choose( const ast::WaitForStmt * waitfor, ast::Expr * result ) { |
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| 445 | const CodeLocation & location = waitfor->location; |
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| 446 | |
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| 447 | ast::SwitchStmt * theSwitch = new ast::SwitchStmt( location, |
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| 448 | result, |
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| 449 | std::vector<ast::ptr<ast::CaseClause>>() |
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| 450 | ); |
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| 451 | |
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| 452 | // For some reason, enumerate doesn't work here because of references. |
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| 453 | for ( size_t i = 0 ; i < waitfor->clauses.size() ; ++i ) { |
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| 454 | theSwitch->cases.push_back( |
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| 455 | new ast::CaseClause( location, |
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| 456 | ast::ConstantExpr::from_ulong( location, i ), |
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| 457 | { |
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| 458 | new ast::CompoundStmt( location, { |
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| 459 | waitfor->clauses[i]->stmt, |
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| 460 | new ast::BranchStmt( location, |
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| 461 | ast::BranchStmt::Break, |
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| 462 | ast::Label( location ) |
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| 463 | ) |
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| 464 | }) |
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| 465 | } |
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| 466 | ) |
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| 467 | ); |
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| 468 | } |
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| 469 | |
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| 470 | if ( waitfor->timeout_stmt ) { |
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| 471 | theSwitch->cases.push_back( |
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| 472 | new ast::CaseClause( location, |
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| 473 | ast::ConstantExpr::from_int( location, -2 ), |
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| 474 | { |
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| 475 | new ast::CompoundStmt( location, { |
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| 476 | waitfor->timeout_stmt, |
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| 477 | new ast::BranchStmt( location, |
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| 478 | ast::BranchStmt::Break, |
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| 479 | ast::Label( location ) |
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| 480 | ) |
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| 481 | }) |
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| 482 | } |
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| 483 | ) |
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| 484 | ); |
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| 485 | } |
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| 486 | |
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| 487 | if ( waitfor->else_stmt ) { |
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| 488 | theSwitch->cases.push_back( |
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| 489 | new ast::CaseClause( location, |
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| 490 | ast::ConstantExpr::from_int( location, -1 ), |
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| 491 | { |
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| 492 | new ast::CompoundStmt( location, { |
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| 493 | waitfor->else_stmt, |
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| 494 | new ast::BranchStmt( location, |
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| 495 | ast::BranchStmt::Break, |
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| 496 | ast::Label( location ) |
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| 497 | ) |
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| 498 | }) |
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| 499 | } |
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| 500 | ) |
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| 501 | ); |
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| 502 | } |
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| 503 | |
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| 504 | return theSwitch; |
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| 505 | } |
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| 506 | |
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| 507 | void GenerateWaitForCore::previsit( const ast::FunctionDecl * decl ) { |
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| 508 | if ( "__waitfor_internal" == decl->name ) { |
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| 509 | decl_waitfor = decl; |
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| 510 | } |
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| 511 | } |
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| 512 | |
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| 513 | void GenerateWaitForCore::previsit( const ast::StructDecl * decl ) { |
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| 514 | if ( !decl->body ) { |
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| 515 | return; |
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| 516 | } else if ( "__acceptable_t" == decl->name ) { |
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| 517 | assert( !decl_acceptable ); |
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| 518 | decl_acceptable = decl; |
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| 519 | } else if ( "__waitfor_mask_t" == decl->name ) { |
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| 520 | assert( !decl_mask ); |
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| 521 | decl_mask = decl; |
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| 522 | } else if ( "monitor$" == decl->name ) { |
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| 523 | assert( !decl_monitor ); |
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| 524 | decl_monitor = decl; |
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| 525 | } |
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| 526 | } |
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| 527 | |
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| 528 | ast::Stmt * GenerateWaitForCore::postvisit( const ast::WaitForStmt * stmt ) { |
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| 529 | if ( !decl_monitor || !decl_acceptable || !decl_mask ) { |
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| 530 | SemanticError( stmt, "waitfor keyword requires monitors to be in scope, add #include <monitor.hfa>" ); |
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| 531 | } |
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| 532 | |
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| 533 | const CodeLocation & location = stmt->location; |
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| 534 | ast::CompoundStmt * comp = new ast::CompoundStmt( location ); |
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| 535 | |
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| 536 | ast::ObjectDecl * acceptables = declareAcceptables( comp, location, stmt->clauses.size() ); |
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| 537 | ast::ObjectDecl * flag = declareFlag( comp, location ); |
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| 538 | ast::Stmt * setter = makeSetter( location, flag ); |
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| 539 | |
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| 540 | // For some reason, enumerate doesn't work here because of references. |
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| 541 | for ( size_t i = 0 ; i < stmt->clauses.size() ; ++i ) { |
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| 542 | init_clause( comp, acceptables, i, stmt->clauses[i], setter ); |
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| 543 | } |
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| 544 | |
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| 545 | ast::Expr * timeout = init_timeout( |
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| 546 | comp, |
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| 547 | location, |
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| 548 | stmt->timeout_time, |
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| 549 | stmt->timeout_cond, |
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| 550 | stmt->else_stmt, |
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| 551 | stmt->else_cond, |
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| 552 | setter |
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| 553 | ); |
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| 554 | |
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| 555 | ast::CompoundStmt * compound = new ast::CompoundStmt( location ); |
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| 556 | comp->push_back( new ast::IfStmt( location, |
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| 557 | new ast::VariableExpr( location, flag ), |
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| 558 | compound, |
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| 559 | nullptr |
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| 560 | )); |
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| 561 | |
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| 562 | ast::Expr * result = call( |
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| 563 | compound, location, stmt->clauses.size(), acceptables, timeout ); |
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| 564 | compound->push_back( choose( stmt, result ) ); |
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| 565 | return comp; |
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| 566 | } |
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| 567 | |
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| 568 | } // namespace |
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| 569 | |
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| 570 | void generateWaitFor( ast::TranslationUnit & translationUnit ) { |
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| 571 | ast::Pass<GenerateWaitForCore>::run( translationUnit ); |
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| 572 | } |
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| 573 | |
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| 574 | } // namespace Concurrency |
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| 575 | |
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| 576 | // Local Variables: // |
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| 577 | // tab-width: 4 // |
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| 578 | // mode: c++ // |
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| 579 | // compile-command: "make install" // |
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| 580 | // End: // |
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