1 // Compatibility symbols for previous versions, C++0x bits -*- C++ -*- 2 3 // Copyright (C) 2009-2021 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 #define _GLIBCXX_ASM_SYMVER(cur, old, version) \ 39 asm (".symver " #cur "," #old "@@@" #version); 40 41 // XXX GLIBCXX_ABI Deprecated 42 // gcc-4.6.0 43 // <future> export changes 44 #if defined(_GLIBCXX_SYMVER_GNU) && defined(_GLIBCXX_SHARED) \ 45 && defined(_GLIBCXX_HAVE_AS_SYMVER_DIRECTIVE) \ 46 && defined(_GLIBCXX_HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT) 47 48 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) 49 { 50 const std::error_category* future_category = &std::future_category(); 51 } 52 53 _GLIBCXX_ASM_SYMVER(_ZN9__gnu_cxx15future_categoryE, _ZSt15future_category, GLIBCXX_3.4.14) 54 55 #endif 56 57 // XXX GLIBCXX_ABI Deprecated 58 // gcc-4.6.0 59 // <mutex> export changes 60 #if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1) 61 #if defined(_GLIBCXX_SYMVER_GNU) && defined(_GLIBCXX_SHARED) \ 62 && defined(_GLIBCXX_HAVE_AS_SYMVER_DIRECTIVE) \ 63 && defined(_GLIBCXX_HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT) 64 65 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) 66 { 67 std::defer_lock_t defer_lock; 68 std::try_to_lock_t try_to_lock; 69 std::adopt_lock_t adopt_lock; 70 } 71 72 _GLIBCXX_ASM_SYMVER(_ZN9__gnu_cxx10adopt_lockE, _ZSt10adopt_lock, GLIBCXX_3.4.11) 73 _GLIBCXX_ASM_SYMVER(_ZN9__gnu_cxx10defer_lockE, _ZSt10defer_lock, GLIBCXX_3.4.11) 74 _GLIBCXX_ASM_SYMVER(_ZN9__gnu_cxx11try_to_lockE, _ZSt11try_to_lock, GLIBCXX_3.4.11) 75 76 77 #endif 78 #endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1 79 80 81 // XXX GLIBCXX_ABI Deprecated 82 // gcc-4.7.0, gcc-4.9.0 83 // <future> export changes 84 #if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1) \ 85 && (ATOMIC_INT_LOCK_FREE > 1) 86 #if defined(_GLIBCXX_SHARED) 87 namespace std _GLIBCXX_VISIBILITY(default) 88 { 89 _GLIBCXX_BEGIN_NAMESPACE_VERSION 90 // Replaced by _State_baseV2 in gcc-4.9.0 91 class __future_base::_State_base 92 { 93 typedef _Ptr<_Result_base> _Ptr_type; 94 95 _Ptr_type _M_result; 96 mutex _M_mutex; 97 condition_variable _M_cond; 98 atomic_flag _M_retrieved; 99 once_flag _M_once; 100 public: 101 virtual ~_State_base(); _M_run_deferred()102 virtual void _M_run_deferred() { } 103 }; ~_State_base()104 __future_base::_State_base::~_State_base() { } 105 106 // Replaced by _Async_state_commonV2 in gcc-4.9.0 107 class __future_base::_Async_state_common : public __future_base::_State_base 108 { 109 protected: 110 ~_Async_state_common(); _M_run_deferred()111 virtual void _M_run_deferred() { _M_join(); } _M_join()112 void _M_join() { std::call_once(_M_once, &thread::join, &_M_thread); } 113 thread _M_thread; 114 once_flag _M_once; 115 }; 116 #if defined(_GLIBCXX_HAVE_TLS) 117 // Replaced with inline definition in gcc-4.8.0 ~_Async_state_common()118 __future_base::_Async_state_common::~_Async_state_common() { _M_join(); } 119 120 // Explicit instantiation due to -fno-implicit-templates. 121 template void call_once(once_flag&, void (thread::*&&)(), thread*&&); 122 #endif // _GLIBCXX_HAVE_TLS 123 _GLIBCXX_END_NAMESPACE_VERSION 124 } // namespace std 125 #endif // _GLIBCXX_SHARED 126 #endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1 127