[2cf3b87] | 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 | // KeywordsNew.cpp -- Implement concurrency constructs from their keywords. |
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| 8 | // |
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| 9 | // Author : Andrew Beach |
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| 10 | // Created On : Tue Nov 16 9:53:00 2021 |
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| 11 | // Last Modified By : Andrew Beach |
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[56f519b] | 12 | // Last Modified On : Wed Dec 1 11:24:00 2021 |
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| 13 | // Update Count : 1 |
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[2cf3b87] | 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 "AST/Copy.hpp" |
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| 19 | #include "AST/Decl.hpp" |
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| 20 | #include "AST/Pass.hpp" |
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| 21 | #include "AST/Stmt.hpp" |
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| 22 | #include "AST/TranslationUnit.hpp" |
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| 23 | #include "CodeGen/OperatorTable.h" |
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| 24 | #include "Common/utility.h" |
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| 25 | #include "InitTweak/InitTweak.h" |
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| 26 | |
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| 27 | namespace Concurrency { |
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| 28 | |
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| 29 | namespace { |
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| 30 | |
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| 31 | inline static bool isThread( const ast::DeclWithType * decl ) { |
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| 32 | auto baseType = decl->get_type()->stripDeclarator(); |
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| 33 | auto instType = dynamic_cast<const ast::StructInstType *>( baseType ); |
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| 34 | if ( nullptr == instType ) { return false; } |
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| 35 | return instType->base->is_thread(); |
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| 36 | } |
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| 37 | |
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| 38 | // -------------------------------------------------------------------------- |
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| 39 | struct MutexKeyword final { |
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| 40 | const ast::FunctionDecl * postvisit( const ast::FunctionDecl * decl ); |
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| 41 | void postvisit( const ast::StructDecl * decl ); |
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| 42 | const ast::Stmt * postvisit( const ast::MutexStmt * stmt ); |
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| 43 | |
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[56f519b] | 44 | static std::vector<const ast::DeclWithType *> findMutexArgs( |
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[2cf3b87] | 45 | const ast::FunctionDecl * decl, bool & first ); |
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[56f519b] | 46 | static void validate( const ast::DeclWithType * decl ); |
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| 47 | |
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[2cf3b87] | 48 | ast::CompoundStmt * addDtorStatements( const ast::FunctionDecl* func, const ast::CompoundStmt *, const std::vector<const ast::DeclWithType *> &); |
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| 49 | ast::CompoundStmt * addStatements( const ast::FunctionDecl* func, const ast::CompoundStmt *, const std::vector<const ast::DeclWithType *> &); |
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| 50 | ast::CompoundStmt * addStatements( const ast::CompoundStmt * body, const std::vector<ast::ptr<ast::Expr>> & args ); |
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| 51 | ast::CompoundStmt * addThreadDtorStatements( const ast::FunctionDecl* func, const ast::CompoundStmt * body, const std::vector<const ast::DeclWithType *> & args ); |
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| 52 | |
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[56f519b] | 53 | private: |
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[2cf3b87] | 54 | const ast::StructDecl * monitor_decl = nullptr; |
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| 55 | const ast::StructDecl * guard_decl = nullptr; |
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| 56 | const ast::StructDecl * dtor_guard_decl = nullptr; |
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| 57 | const ast::StructDecl * thread_guard_decl = nullptr; |
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| 58 | const ast::StructDecl * lock_guard_decl = nullptr; |
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| 59 | |
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| 60 | static ast::ptr<ast::Type> generic_func; |
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| 61 | }; |
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| 62 | |
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| 63 | const ast::FunctionDecl * MutexKeyword::postvisit( |
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| 64 | const ast::FunctionDecl * decl ) { |
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| 65 | bool is_first_argument_mutex = false; |
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| 66 | const std::vector<const ast::DeclWithType *> mutexArgs = |
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| 67 | findMutexArgs( decl, is_first_argument_mutex ); |
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| 68 | bool const isDtor = CodeGen::isDestructor( decl->name ); |
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| 69 | |
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| 70 | // Does this function have any mutex arguments that connect to monitors? |
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| 71 | if ( mutexArgs.empty() ) { |
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| 72 | // If this is the destructor for a monitor it must be mutex. |
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| 73 | if ( isDtor ) { |
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| 74 | // This reflects MutexKeyword::validate, but no error messages. |
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| 75 | const ast::Type * type = decl->type->params.front(); |
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| 76 | |
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| 77 | // If it's a copy, it's not a mutex. |
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| 78 | const ast::ReferenceType * refType = dynamic_cast<const ast::ReferenceType *>( type ); |
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| 79 | if ( nullptr == refType ) { |
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| 80 | return decl; |
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| 81 | } |
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| 82 | |
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| 83 | // If it is not pointing directly to a type, it's not a mutex. |
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| 84 | auto base = refType->base; |
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| 85 | if ( base.as<ast::ReferenceType>() ) return decl; |
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| 86 | if ( base.as<ast::PointerType>() ) return decl; |
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| 87 | |
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| 88 | // If it is not a struct, it's not a mutex. |
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| 89 | auto baseStruct = base.as<ast::StructInstType>(); |
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| 90 | if ( nullptr == baseStruct ) return decl; |
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| 91 | |
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| 92 | // If it is a monitor, then it is a monitor. |
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| 93 | if( baseStruct->base->is_monitor() || baseStruct->base->is_thread() ) { |
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| 94 | SemanticError( decl, "destructors for structures declared as \"monitor\" must use mutex parameters\n" ); |
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| 95 | } |
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| 96 | } |
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| 97 | return decl; |
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| 98 | } |
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| 99 | |
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| 100 | // Monitors can't be constructed with mutual exclusion. |
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[56f519b] | 101 | if ( CodeGen::isConstructor( decl->name ) && is_first_argument_mutex ) { |
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| 102 | SemanticError( decl, "constructors cannot have mutex parameters\n" ); |
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[2cf3b87] | 103 | } |
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| 104 | |
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| 105 | // It makes no sense to have multiple mutex parameters for the destructor. |
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| 106 | if ( isDtor && mutexArgs.size() != 1 ) { |
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[56f519b] | 107 | SemanticError( decl, "destructors can only have 1 mutex argument\n" ); |
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[2cf3b87] | 108 | } |
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| 109 | |
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| 110 | // Make sure all the mutex arguments are monitors. |
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| 111 | for ( auto arg : mutexArgs ) { |
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| 112 | validate( arg ); |
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| 113 | } |
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| 114 | |
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| 115 | // Check to see if the body needs to be instrument the body. |
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| 116 | const ast::CompoundStmt * body = decl->stmts; |
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| 117 | if ( !body ) return decl; |
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| 118 | |
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| 119 | // Check to if the required headers have been seen. |
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| 120 | if ( !monitor_decl || !guard_decl || !dtor_guard_decl ) { |
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| 121 | SemanticError( decl, "mutex keyword requires monitors to be in scope, add #include <monitor.hfa>\n" ); |
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| 122 | } |
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| 123 | |
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| 124 | // Instrument the body. |
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| 125 | ast::CompoundStmt * newBody = nullptr; |
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| 126 | if ( isDtor && isThread( mutexArgs.front() ) ) { |
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| 127 | if ( !thread_guard_decl ) { |
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| 128 | SemanticError( decl, "thread destructor requires threads to be in scope, add #include <thread.hfa>\n" ); |
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| 129 | } |
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| 130 | newBody = addThreadDtorStatements( decl, body, mutexArgs ); |
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| 131 | } else if ( isDtor ) { |
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| 132 | newBody = addDtorStatements( decl, body, mutexArgs ); |
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| 133 | } else { |
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| 134 | newBody = addStatements( decl, body, mutexArgs ); |
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| 135 | } |
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| 136 | assert( newBody ); |
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| 137 | return ast::mutate_field( decl, &ast::FunctionDecl::stmts, newBody ); |
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| 138 | } |
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| 139 | |
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| 140 | void MutexKeyword::postvisit( const ast::StructDecl * decl ) { |
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| 141 | if ( !decl->body ) { |
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| 142 | return; |
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| 143 | } else if ( decl->name == "monitor$" ) { |
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| 144 | assert( !monitor_decl ); |
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| 145 | monitor_decl = decl; |
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| 146 | } else if ( decl->name == "monitor_guard_t" ) { |
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| 147 | assert( !guard_decl ); |
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| 148 | guard_decl = decl; |
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| 149 | } else if ( decl->name == "monitor_dtor_guard_t" ) { |
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| 150 | assert( !dtor_guard_decl ); |
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| 151 | dtor_guard_decl = decl; |
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| 152 | } else if ( decl->name == "thread_dtor_guard_t" ) { |
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| 153 | assert( !thread_guard_decl ); |
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| 154 | thread_guard_decl = decl; |
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| 155 | } else if ( decl->name == "__mutex_stmt_lock_guard" ) { |
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| 156 | assert( !lock_guard_decl ); |
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| 157 | lock_guard_decl = decl; |
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| 158 | } |
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| 159 | } |
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| 160 | |
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| 161 | const ast::Stmt * MutexKeyword::postvisit( const ast::MutexStmt * stmt ) { |
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| 162 | ast::CompoundStmt * body = |
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| 163 | new ast::CompoundStmt( stmt->location, { stmt->stmt } ); |
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| 164 | addStatements( body, stmt->mutexObjs ); |
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| 165 | return body; |
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| 166 | } |
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| 167 | |
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| 168 | std::vector<const ast::DeclWithType *> MutexKeyword::findMutexArgs( |
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| 169 | const ast::FunctionDecl * decl, bool & first ) { |
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| 170 | std::vector<const ast::DeclWithType *> mutexArgs; |
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| 171 | |
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| 172 | bool once = true; |
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| 173 | for ( auto arg : decl->params ) { |
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| 174 | const ast::Type * type = arg->get_type(); |
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[56f519b] | 175 | if ( type->is_mutex() ) { |
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| 176 | if ( once ) first = true; |
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| 177 | mutexArgs.push_back( arg.get() ); |
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[2cf3b87] | 178 | } |
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[56f519b] | 179 | once = false; |
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[2cf3b87] | 180 | } |
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| 181 | return mutexArgs; |
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| 182 | } |
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| 183 | |
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| 184 | void MutexKeyword::validate( const ast::DeclWithType * decl ) { |
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| 185 | const ast::Type * type = decl->get_type(); |
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| 186 | |
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| 187 | // If it's a copy, it's not a mutex. |
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| 188 | const ast::ReferenceType * refType = dynamic_cast<const ast::ReferenceType *>( type ); |
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| 189 | if ( nullptr == refType ) { |
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| 190 | SemanticError( decl, "Mutex argument must be of reference type " ); |
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| 191 | } |
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| 192 | |
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| 193 | // If it is not pointing directly to a type, it's not a mutex. |
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| 194 | auto base = refType->base; |
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| 195 | if ( base.as<ast::ReferenceType>() || base.as<ast::PointerType>() ) { |
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| 196 | SemanticError( decl, "Mutex argument have exactly one level of indirection " ); |
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| 197 | } |
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| 198 | |
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| 199 | // If it is not a struct, it's not a mutex. |
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| 200 | auto baseStruct = base.as<ast::StructInstType>(); |
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| 201 | if ( nullptr == baseStruct ) return; |
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| 202 | |
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| 203 | // Make sure that only the outer reference is mutex. |
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| 204 | if( baseStruct->is_mutex() ) { |
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| 205 | SemanticError( decl, "mutex keyword may only appear once per argument " ); |
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| 206 | } |
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| 207 | } |
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| 208 | |
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| 209 | ast::CompoundStmt * MutexKeyword::addDtorStatements( |
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| 210 | const ast::FunctionDecl* func, const ast::CompoundStmt * body, |
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| 211 | const std::vector<const ast::DeclWithType *> & args ) { |
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| 212 | ast::Type * argType = ast::shallowCopy( args.front()->get_type() ); |
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| 213 | argType->set_mutex( false ); |
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| 214 | |
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| 215 | ast::CompoundStmt * mutBody = ast::mutate( body ); |
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| 216 | |
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| 217 | // Generated code goes near the beginning of body: |
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| 218 | const CodeLocation & location = mutBody->location; |
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| 219 | |
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| 220 | const ast::ObjectDecl * monitor = new ast::ObjectDecl( |
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| 221 | location, |
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| 222 | "__monitor", |
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| 223 | new ast::PointerType( new ast::StructInstType( monitor_decl ) ), |
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| 224 | new ast::SingleInit( |
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| 225 | location, |
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| 226 | new ast::UntypedExpr( |
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| 227 | location, |
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| 228 | new ast::NameExpr( location, "get_monitor" ), |
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| 229 | { new ast::CastExpr( |
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| 230 | location, |
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| 231 | new ast::VariableExpr( location, args.front() ), |
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| 232 | argType, ast::ExplicitCast |
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| 233 | ) } |
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| 234 | ) |
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| 235 | ), |
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| 236 | ast::Storage::Classes(), |
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| 237 | ast::Linkage::Cforall |
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| 238 | ); |
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| 239 | |
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| 240 | assert( generic_func ); |
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| 241 | |
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| 242 | // In reverse order: |
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| 243 | // monitor_dtor_guard_t __guard = { __monitor, func, false }; |
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| 244 | mutBody->push_front( |
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| 245 | new ast::DeclStmt( location, new ast::ObjectDecl( |
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| 246 | location, |
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| 247 | "__guard", |
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| 248 | new ast::StructInstType( dtor_guard_decl ), |
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| 249 | new ast::ListInit( |
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| 250 | location, |
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| 251 | { |
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| 252 | new ast::SingleInit( location, |
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| 253 | new ast::AddressExpr( |
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| 254 | new ast::VariableExpr( location, monitor ) ) ), |
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| 255 | new ast::SingleInit( location, |
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| 256 | new ast::CastExpr( location, |
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| 257 | new ast::VariableExpr( location, func ), |
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| 258 | generic_func, |
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| 259 | ast::ExplicitCast ) ), |
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| 260 | new ast::SingleInit( location, |
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| 261 | ast::ConstantExpr::from_bool( location, false ) ), |
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| 262 | }, |
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| 263 | {}, |
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| 264 | ast::MaybeConstruct |
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| 265 | ), |
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| 266 | ast::Storage::Classes(), |
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| 267 | ast::Linkage::Cforall |
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| 268 | )) |
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| 269 | ); |
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| 270 | |
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| 271 | // monitor$ * __monitor = get_monitor(a); |
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| 272 | mutBody->push_front( new ast::DeclStmt( location, monitor ) ); |
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| 273 | |
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| 274 | return mutBody; |
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| 275 | } |
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| 276 | |
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| 277 | ast::CompoundStmt * MutexKeyword::addStatements( |
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| 278 | const ast::FunctionDecl* func, const ast::CompoundStmt * body, |
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| 279 | const std::vector<const ast::DeclWithType * > & args ) { |
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| 280 | ast::CompoundStmt * mutBody = ast::mutate( body ); |
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| 281 | |
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| 282 | // Code is generated near the beginning of the compound statement. |
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| 283 | const CodeLocation & location = mutBody->location; |
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| 284 | |
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| 285 | // Make pointer to the monitors. |
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| 286 | ast::ObjectDecl * monitors = new ast::ObjectDecl( |
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| 287 | location, |
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| 288 | "__monitors", |
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| 289 | new ast::ArrayType( |
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| 290 | new ast::PointerType( |
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| 291 | new ast::StructInstType( monitor_decl ) |
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| 292 | ), |
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| 293 | ast::ConstantExpr::from_ulong( location, args.size() ), |
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| 294 | ast::FixedLen, |
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| 295 | ast::DynamicDim |
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| 296 | ), |
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| 297 | new ast::ListInit( |
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| 298 | location, |
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| 299 | map_range<std::vector<ast::ptr<ast::Init>>>( |
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| 300 | args, |
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| 301 | []( const ast::DeclWithType * decl ) { |
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| 302 | return new ast::SingleInit( |
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| 303 | decl->location, |
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| 304 | new ast::UntypedExpr( |
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| 305 | decl->location, |
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| 306 | new ast::NameExpr( decl->location, "get_monitor" ), |
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| 307 | { |
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| 308 | new ast::CastExpr( |
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| 309 | decl->location, |
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| 310 | new ast::VariableExpr( decl->location, decl ), |
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| 311 | decl->get_type(), |
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| 312 | ast::ExplicitCast |
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| 313 | ) |
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| 314 | } |
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| 315 | ) |
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| 316 | ); |
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| 317 | } |
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| 318 | ) |
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| 319 | ), |
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| 320 | ast::Storage::Classes(), |
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| 321 | ast::Linkage::Cforall |
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| 322 | ); |
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| 323 | |
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| 324 | assert( generic_func ); |
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| 325 | |
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| 326 | // In Reverse Order: |
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| 327 | mutBody->push_front( |
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| 328 | new ast::DeclStmt( location, new ast::ObjectDecl( |
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| 329 | location, |
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| 330 | "__guard", |
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| 331 | new ast::StructInstType( guard_decl ), |
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| 332 | new ast::ListInit( |
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| 333 | location, |
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| 334 | { |
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| 335 | new ast::SingleInit( location, |
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| 336 | new ast::VariableExpr( location, monitors ) ), |
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| 337 | new ast::SingleInit( location, |
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| 338 | ast::ConstantExpr::from_ulong( location, args.size() ) ), |
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| 339 | new ast::SingleInit( location, new ast::CastExpr( |
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| 340 | location, |
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| 341 | new ast::VariableExpr( location, func ), |
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| 342 | generic_func, |
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| 343 | ast::ExplicitCast |
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| 344 | ) ), |
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| 345 | }, |
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| 346 | {}, |
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| 347 | ast::MaybeConstruct |
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| 348 | ), |
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| 349 | ast::Storage::Classes(), |
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| 350 | ast::Linkage::Cforall |
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| 351 | )) |
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| 352 | ); |
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| 353 | |
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| 354 | // monitor$ * __monitors[] = { get_monitor(a), get_monitor(b) }; |
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| 355 | mutBody->push_front( new ast::DeclStmt( location, monitors ) ); |
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| 356 | |
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| 357 | return mutBody; |
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| 358 | } |
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| 359 | |
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| 360 | ast::CompoundStmt * MutexKeyword::addStatements( |
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| 361 | const ast::CompoundStmt * body, |
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| 362 | const std::vector<ast::ptr<ast::Expr>> & args ) { |
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| 363 | ast::CompoundStmt * mutBody = ast::mutate( body ); |
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| 364 | |
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| 365 | // Code is generated near the beginning of the compound statement. |
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| 366 | const CodeLocation & location = mutBody->location; |
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| 367 | |
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| 368 | // Make pointer to the monitors. |
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| 369 | ast::ObjectDecl * monitors = new ast::ObjectDecl( |
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| 370 | location, |
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| 371 | "__monitors", |
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| 372 | new ast::ArrayType( |
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| 373 | new ast::PointerType( |
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| 374 | new ast::TypeofType( |
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| 375 | new ast::UntypedExpr( |
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| 376 | location, |
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| 377 | new ast::NameExpr( location, "__get_type" ), |
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| 378 | { args.front() } |
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| 379 | ) |
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| 380 | ) |
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| 381 | ), |
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| 382 | ast::ConstantExpr::from_ulong( location, args.size() ), |
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| 383 | ast::FixedLen, |
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| 384 | ast::DynamicDim |
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| 385 | ), |
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| 386 | new ast::ListInit( |
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| 387 | location, |
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| 388 | map_range<std::vector<ast::ptr<ast::Init>>>( |
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| 389 | args, [](const ast::Expr * expr) { |
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| 390 | return new ast::SingleInit( |
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| 391 | expr->location, |
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| 392 | new ast::UntypedExpr( |
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| 393 | expr->location, |
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| 394 | new ast::NameExpr( expr->location, "__get_ptr" ), |
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| 395 | { expr } |
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| 396 | ) |
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| 397 | ); |
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| 398 | } |
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| 399 | ) |
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| 400 | ), |
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| 401 | ast::Storage::Classes(), |
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| 402 | ast::Linkage::Cforall |
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| 403 | ); |
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| 404 | |
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| 405 | ast::StructInstType * lock_guard_struct = |
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| 406 | new ast::StructInstType( lock_guard_decl ); |
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| 407 | ast::TypeExpr * lock_type_expr = new ast::TypeExpr( |
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| 408 | location, |
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| 409 | new ast::TypeofType( |
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| 410 | new ast::UntypedExpr( |
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| 411 | location, |
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| 412 | new ast::NameExpr( location, "__get_type" ), |
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| 413 | { args.front() } |
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| 414 | ) |
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| 415 | ) |
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| 416 | ); |
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| 417 | |
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| 418 | lock_guard_struct->params.push_back( lock_type_expr ); |
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| 419 | |
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| 420 | // In reverse order: |
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| 421 | // monitor_guard_t __guard = { __monitors, # }; |
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| 422 | mutBody->push_front( |
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| 423 | new ast::DeclStmt( |
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| 424 | location, |
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| 425 | new ast::ObjectDecl( |
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| 426 | location, |
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| 427 | "__guard", |
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| 428 | lock_guard_struct, |
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| 429 | new ast::ListInit( |
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| 430 | location, |
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| 431 | { |
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| 432 | new ast::SingleInit( |
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| 433 | location, |
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| 434 | new ast::VariableExpr( location, monitors ) ), |
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| 435 | new ast::SingleInit( |
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| 436 | location, |
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| 437 | ast::ConstantExpr::from_ulong( location, args.size() ) ), |
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| 438 | }, |
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| 439 | {}, |
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| 440 | ast::MaybeConstruct |
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| 441 | ), |
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| 442 | ast::Storage::Classes(), |
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| 443 | ast::Linkage::Cforall |
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| 444 | ) |
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| 445 | ) |
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| 446 | ); |
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| 447 | |
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| 448 | // monitor$ * __monitors[] = { get_monitor(a), get_monitor(b) }; |
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| 449 | mutBody->push_front( new ast::DeclStmt( location, monitors ) ); |
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| 450 | |
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| 451 | return mutBody; |
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| 452 | } |
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| 453 | |
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| 454 | ast::CompoundStmt * MutexKeyword::addThreadDtorStatements( |
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| 455 | const ast::FunctionDecl*, const ast::CompoundStmt * body, |
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| 456 | const std::vector<const ast::DeclWithType * > & args ) { |
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| 457 | assert( args.size() == 1 ); |
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| 458 | const ast::DeclWithType * arg = args.front(); |
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| 459 | const ast::Type * argType = arg->get_type(); |
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| 460 | assert( argType->is_mutex() ); |
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| 461 | |
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| 462 | ast::CompoundStmt * mutBody = ast::mutate( body ); |
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| 463 | |
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| 464 | // The code is generated near the front of the body. |
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| 465 | const CodeLocation & location = mutBody->location; |
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| 466 | |
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| 467 | // thread_dtor_guard_t __guard = { this, intptr( 0 ) }; |
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| 468 | mutBody->push_front( new ast::DeclStmt( |
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| 469 | location, |
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| 470 | new ast::ObjectDecl( |
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| 471 | location, |
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| 472 | "__guard", |
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| 473 | new ast::StructInstType( thread_guard_decl ), |
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| 474 | new ast::ListInit( |
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| 475 | location, |
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| 476 | { |
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| 477 | new ast::SingleInit( location, |
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| 478 | new ast::CastExpr( location, |
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| 479 | new ast::VariableExpr( location, arg ), argType ) ), |
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| 480 | new ast::SingleInit( |
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| 481 | location, |
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| 482 | new ast::UntypedExpr( |
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| 483 | location, |
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| 484 | new ast::NameExpr( location, "intptr" ), { |
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| 485 | ast::ConstantExpr::from_int( location, 0 ), |
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| 486 | } |
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| 487 | ) ), |
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| 488 | }, |
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| 489 | {}, |
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| 490 | ast::MaybeConstruct |
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| 491 | ), |
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| 492 | ast::Storage::Classes(), |
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| 493 | ast::Linkage::Cforall |
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| 494 | ) |
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| 495 | )); |
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| 496 | |
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| 497 | return mutBody; |
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| 498 | } |
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| 499 | |
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| 500 | ast::ptr<ast::Type> MutexKeyword::generic_func = |
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| 501 | new ast::FunctionType( ast::VariableArgs ); |
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| 502 | |
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| 503 | // -------------------------------------------------------------------------- |
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| 504 | struct ThreadStarter final { |
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| 505 | void previsit( const ast::StructDecl * decl ); |
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| 506 | const ast::FunctionDecl * postvisit( const ast::FunctionDecl * decl ); |
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| 507 | |
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| 508 | private: |
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| 509 | bool thread_ctor_seen = false; |
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| 510 | const ast::StructDecl * thread_decl = nullptr; |
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| 511 | }; |
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| 512 | |
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| 513 | void ThreadStarter::previsit( const ast::StructDecl * decl ) { |
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| 514 | if ( decl->body && decl->name == "thread$" ) { |
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| 515 | assert( !thread_decl ); |
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| 516 | thread_decl = decl; |
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| 517 | } |
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| 518 | } |
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| 519 | |
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| 520 | const ast::FunctionDecl * ThreadStarter::postvisit( const ast::FunctionDecl * decl ) { |
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| 521 | if ( !CodeGen::isConstructor( decl->name ) ) return decl; |
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| 522 | |
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| 523 | // Seach for the thread constructor. |
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| 524 | // (Are the "prefixes" of these to blocks the same?) |
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| 525 | const ast::Type * typeof_this = InitTweak::getTypeofThis( decl->type ); |
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| 526 | auto ctored_type = dynamic_cast<const ast::StructInstType *>( typeof_this ); |
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| 527 | if ( ctored_type && ctored_type->base == thread_decl ) { |
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| 528 | thread_ctor_seen = true; |
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| 529 | } |
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| 530 | |
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| 531 | // Modify this declaration, the extra checks to see if we will are first. |
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| 532 | const ast::ptr<ast::DeclWithType> & param = decl->params.front(); |
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| 533 | auto type = dynamic_cast<const ast::StructInstType *>( |
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| 534 | InitTweak::getPointerBase( param->get_type() ) ); |
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| 535 | if ( nullptr == type ) return decl; |
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| 536 | if ( !type->base->is_thread() ) return decl; |
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| 537 | if ( !thread_decl || !thread_ctor_seen ) { |
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| 538 | SemanticError( type->base->location, "thread keyword requires threads to be in scope, add #include <thread.hfa>" ); |
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| 539 | } |
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| 540 | const ast::CompoundStmt * stmt = decl->stmts; |
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| 541 | if ( nullptr == stmt ) return decl; |
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| 542 | |
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| 543 | // Now do the actual modification: |
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| 544 | ast::CompoundStmt * mutStmt = ast::mutate( stmt ); |
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| 545 | const CodeLocation & location = mutStmt->location; |
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| 546 | mutStmt->push_back( |
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| 547 | new ast::ExprStmt( |
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| 548 | location, |
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| 549 | new ast::UntypedExpr( |
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| 550 | location, |
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| 551 | new ast::NameExpr( location, "__thrd_start" ), |
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| 552 | { |
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| 553 | new ast::VariableExpr( location, param ), |
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| 554 | new ast::NameExpr( location, "main" ), |
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| 555 | } |
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| 556 | ) |
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| 557 | ) |
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| 558 | ); |
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| 559 | |
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| 560 | return ast::mutate_field( decl, &ast::FunctionDecl::stmts, mutStmt ); |
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| 561 | } |
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| 562 | |
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| 563 | } // namespace |
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| 564 | |
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| 565 | // -------------------------------------------------------------------------- |
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| 566 | |
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| 567 | void implementKeywords( ast::TranslationUnit & translationUnit ) { |
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| 568 | (void)translationUnit; |
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| 569 | assertf(false, "Apply Keywords not implemented." ); |
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| 570 | } |
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| 571 | |
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| 572 | void implementMutex( ast::TranslationUnit & translationUnit ) { |
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| 573 | ast::Pass<MutexKeyword>::run( translationUnit ); |
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| 574 | } |
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| 575 | |
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| 576 | void implementThreadStarter( ast::TranslationUnit & translationUnit ) { |
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| 577 | ast::Pass<ThreadStarter>::run( translationUnit ); |
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| 578 | } |
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| 579 | |
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| 580 | } |
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| 581 | |
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| 582 | // Local Variables: // |
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| 583 | // tab-width: 4 // |
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| 584 | // mode: c++ // |
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| 585 | // compile-command: "make install" // |
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| 586 | // End: // |
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