compatibility-thread-c++0x.cc revision 1.4
1// Compatibility symbols for previous versions, C++0x bits -*- C++ -*- 2 3// Copyright (C) 2009-2019 Free Software Foundation, Inc. 4// 5// This file is part of the GNU ISO C++ Library. This library is free 6// software; you can redistribute it and/or modify it under the 7// terms of the GNU General Public License as published by the 8// Free Software Foundation; either version 3, or (at your option) 9// any later version. 10 11// This library is distributed in the hope that it will be useful, 12// but WITHOUT ANY WARRANTY; without even the implied warranty of 13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14// GNU General Public License for more details. 15 16// Under Section 7 of GPL version 3, you are granted additional 17// permissions described in the GCC Runtime Library Exception, version 18// 3.1, as published by the Free Software Foundation. 19 20// You should have received a copy of the GNU General Public License and 21// a copy of the GCC Runtime Library Exception along with this program; 22// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23// <http://www.gnu.org/licenses/>. 24 25#include <bits/c++config.h> 26#if defined(_GLIBCXX_SHARED) 27#define _GLIBCXX_ASYNC_ABI_COMPAT 28#endif 29 30#include <future> 31#include <mutex> 32#include <functional> 33 34#if __cplusplus < 201103L 35# error "compatibility-thread-c++0x.cc must be compiled with -std=gnu++0x" 36#endif 37 38#ifdef _GLIBCXX_COMPAT_ 39#define _GLIBCXX_ASM_SYMVER(cur, old, version) \ 40 asm (".symver " #cur "," #old "@@@" #version); 41#else 42#define _GLIBCXX_ASM_SYMVER(cur, old, version) 43#endif 44 45// XXX GLIBCXX_ABI Deprecated 46// gcc-4.6.0 47// <future> export changes 48#if defined(_GLIBCXX_SYMVER_GNU) && defined(_GLIBCXX_SHARED) \ 49 && defined(_GLIBCXX_HAVE_AS_SYMVER_DIRECTIVE) \ 50 && defined(_GLIBCXX_HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT) 51 52namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) 53{ 54 const std::error_category* future_category = &std::future_category(); 55} 56 57_GLIBCXX_ASM_SYMVER(_ZN9__gnu_cxx15future_categoryE, _ZSt15future_category, GLIBCXX_3.4.14) 58 59#endif 60 61// XXX GLIBCXX_ABI Deprecated 62// gcc-4.6.0 63// <mutex> export changes 64#if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1) 65#if defined(_GLIBCXX_SYMVER_GNU) && defined(_GLIBCXX_SHARED) \ 66 && defined(_GLIBCXX_HAVE_AS_SYMVER_DIRECTIVE) \ 67 && defined(_GLIBCXX_HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT) 68 69namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) 70{ 71 std::defer_lock_t defer_lock; 72 std::try_to_lock_t try_to_lock; 73 std::adopt_lock_t adopt_lock; 74} 75 76_GLIBCXX_ASM_SYMVER(_ZN9__gnu_cxx10adopt_lockE, _ZSt10adopt_lock, GLIBCXX_3.4.11) 77_GLIBCXX_ASM_SYMVER(_ZN9__gnu_cxx10defer_lockE, _ZSt10defer_lock, GLIBCXX_3.4.11) 78_GLIBCXX_ASM_SYMVER(_ZN9__gnu_cxx11try_to_lockE, _ZSt11try_to_lock, GLIBCXX_3.4.11) 79 80 81#endif 82#endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1 83 84 85// XXX GLIBCXX_ABI Deprecated 86// gcc-4.7.0, gcc-4.9.0 87// <future> export changes 88#if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1) \ 89 && (ATOMIC_INT_LOCK_FREE > 1) 90#if defined(_GLIBCXX_SHARED) 91namespace std _GLIBCXX_VISIBILITY(default) 92{ 93_GLIBCXX_BEGIN_NAMESPACE_VERSION 94 // Replaced by _State_baseV2 in gcc-4.9.0 95 class __future_base::_State_base 96 { 97 typedef _Ptr<_Result_base> _Ptr_type; 98 99 _Ptr_type _M_result; 100 mutex _M_mutex; 101 condition_variable _M_cond; 102 atomic_flag _M_retrieved; 103 once_flag _M_once; 104 public: 105 virtual ~_State_base(); 106 virtual void _M_run_deferred() { } 107 }; 108 __future_base::_State_base::~_State_base() { } 109 110 // Replaced by _Async_state_commonV2 in gcc-4.9.0 111 class __future_base::_Async_state_common : public __future_base::_State_base 112 { 113 protected: 114 ~_Async_state_common(); 115 virtual void _M_run_deferred() { _M_join(); } 116 void _M_join() { std::call_once(_M_once, &thread::join, &_M_thread); } 117 thread _M_thread; 118 once_flag _M_once; 119 }; 120#if defined(_GLIBCXX_HAVE_TLS) 121 // Replaced with inline definition in gcc-4.8.0 122 __future_base::_Async_state_common::~_Async_state_common() { _M_join(); } 123 124 // Explicit instantiation due to -fno-implicit-templates. 125 template void call_once(once_flag&, void (thread::*&&)(), thread*&&); 126#endif // _GLIBCXX_HAVE_TLS 127_GLIBCXX_END_NAMESPACE_VERSION 128} // namespace std 129#endif // _GLIBCXX_SHARED 130#endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1 131