1 // Compatibility symbols for previous versions, C++0x bits -*- C++ -*- 2 3 // Copyright (C) 2009-2022 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 #if _GLIBCXX_INLINE_VERSION 39 # error "compatibility-thread-c++0x.cc is not needed for gnu-versioned-namespace" 40 #endif 41 42 #ifdef _GLIBCXX_COMPAT_ 43 #define _GLIBCXX_ASM_SYMVER(cur, old, version) \ 44 asm (".symver " #cur "," #old "@@@" #version); 45 #else 46 #define _GLIBCXX_ASM_SYMVER(cur, old, version) 47 #endif 48 49 // XXX GLIBCXX_ABI Deprecated 50 // gcc-4.6.0 51 // <future> export changes 52 #if defined(_GLIBCXX_SYMVER_GNU) && defined(_GLIBCXX_SHARED) \ 53 && defined(_GLIBCXX_HAVE_AS_SYMVER_DIRECTIVE) \ 54 && defined(_GLIBCXX_HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT) 55 56 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) 57 { 58 const std::error_category* future_category = &std::future_category(); 59 } 60 61 _GLIBCXX_ASM_SYMVER(_ZN9__gnu_cxx15future_categoryE, _ZSt15future_category, GLIBCXX_3.4.14) 62 63 #endif 64 65 // XXX GLIBCXX_ABI Deprecated 66 // gcc-4.6.0 67 // <mutex> export changes 68 #if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1) 69 #if defined(_GLIBCXX_SYMVER_GNU) && defined(_GLIBCXX_SHARED) \ 70 && defined(_GLIBCXX_HAVE_AS_SYMVER_DIRECTIVE) \ 71 && defined(_GLIBCXX_HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT) 72 73 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) 74 { 75 std::defer_lock_t defer_lock; 76 std::try_to_lock_t try_to_lock; 77 std::adopt_lock_t adopt_lock; 78 } 79 80 _GLIBCXX_ASM_SYMVER(_ZN9__gnu_cxx10adopt_lockE, _ZSt10adopt_lock, GLIBCXX_3.4.11) 81 _GLIBCXX_ASM_SYMVER(_ZN9__gnu_cxx10defer_lockE, _ZSt10defer_lock, GLIBCXX_3.4.11) 82 _GLIBCXX_ASM_SYMVER(_ZN9__gnu_cxx11try_to_lockE, _ZSt11try_to_lock, GLIBCXX_3.4.11) 83 84 85 #endif 86 #endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1 87 88 89 // XXX GLIBCXX_ABI Deprecated 90 // gcc-4.7.0, gcc-4.9.0 91 // <future> export changes 92 #if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1) \ 93 && (ATOMIC_INT_LOCK_FREE > 1) 94 #if defined(_GLIBCXX_SHARED) 95 namespace std _GLIBCXX_VISIBILITY(default) 96 { 97 _GLIBCXX_BEGIN_NAMESPACE_VERSION 98 // Replaced by _State_baseV2 in gcc-4.9.0 99 class __future_base::_State_base 100 { 101 typedef _Ptr<_Result_base> _Ptr_type; 102 103 _Ptr_type _M_result; 104 mutex _M_mutex; 105 condition_variable _M_cond; 106 atomic_flag _M_retrieved; 107 once_flag _M_once; 108 public: 109 virtual ~_State_base(); _M_run_deferred()110 virtual void _M_run_deferred() { } 111 }; ~_State_base()112 __future_base::_State_base::~_State_base() { } 113 114 // Replaced by _Async_state_commonV2 in gcc-4.9.0 115 class __future_base::_Async_state_common : public __future_base::_State_base 116 { 117 protected: 118 ~_Async_state_common(); _M_run_deferred()119 virtual void _M_run_deferred() { _M_join(); } _M_join()120 void _M_join() { std::call_once(_M_once, &thread::join, &_M_thread); } 121 thread _M_thread; 122 once_flag _M_once; 123 }; 124 #if defined(_GLIBCXX_HAVE_TLS) 125 // Replaced with inline definition in gcc-4.8.0 ~_Async_state_common()126 __future_base::_Async_state_common::~_Async_state_common() { _M_join(); } 127 128 // Explicit instantiation due to -fno-implicit-templates. 129 template void call_once(once_flag&, void (thread::*&&)(), thread*&&); 130 #endif // _GLIBCXX_HAVE_TLS 131 _GLIBCXX_END_NAMESPACE_VERSION 132 } // namespace std 133 #endif // _GLIBCXX_SHARED 134 #endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1 135