1 // Compatibility symbols for previous versions, C++0x bits -*- C++ -*- 2 3 // Copyright (C) 2009-2020 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 52 namespace __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 69 namespace __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) 91 namespace 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(); _M_run_deferred()106 virtual void _M_run_deferred() { } 107 }; ~_State_base()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(); _M_run_deferred()115 virtual void _M_run_deferred() { _M_join(); } _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 ~_Async_state_common()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