1 // Compatibility symbols for previous versions, C++0x bits -*- C++ -*- 2 3 // Copyright (C) 2009-2014 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 33 #if __cplusplus < 201103L 34 # error "compatibility-thread-c++0x.cc must be compiled with -std=gnu++0x" 35 #endif 36 37 #define _GLIBCXX_ASM_SYMVER(cur, old, version) \ 38 asm (".symver " #cur "," #old "@@@" #version); 39 40 // XXX GLIBCXX_ABI Deprecated 41 // gcc-4.6.0 42 // <future> export changes 43 #if defined(_GLIBCXX_SYMVER_GNU) && defined(_GLIBCXX_SHARED) \ 44 && defined(_GLIBCXX_HAVE_AS_SYMVER_DIRECTIVE) \ 45 && defined(_GLIBCXX_HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT) 46 47 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) 48 { 49 const std::error_category* future_category = &std::future_category(); 50 } 51 52 _GLIBCXX_ASM_SYMVER(_ZN9__gnu_cxx15future_categoryE, _ZSt15future_category, GLIBCXX_3.4.14) 53 54 #endif 55 56 // XXX GLIBCXX_ABI Deprecated 57 // gcc-4.6.0 58 // <mutex> export changes 59 #if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1) 60 #if defined(_GLIBCXX_SYMVER_GNU) && defined(_GLIBCXX_SHARED) \ 61 && defined(_GLIBCXX_HAVE_AS_SYMVER_DIRECTIVE) \ 62 && defined(_GLIBCXX_HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT) 63 64 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) 65 { 66 std::defer_lock_t defer_lock; 67 std::try_to_lock_t try_to_lock; 68 std::adopt_lock_t adopt_lock; 69 } 70 71 _GLIBCXX_ASM_SYMVER(_ZN9__gnu_cxx10adopt_lockE, _ZSt10adopt_lock, GLIBCXX_3.4.11) 72 _GLIBCXX_ASM_SYMVER(_ZN9__gnu_cxx10defer_lockE, _ZSt10defer_lock, GLIBCXX_3.4.11) 73 _GLIBCXX_ASM_SYMVER(_ZN9__gnu_cxx11try_to_lockE, _ZSt11try_to_lock, GLIBCXX_3.4.11) 74 75 76 #endif 77 #endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1 78 79 80 // XXX GLIBCXX_ABI Deprecated 81 // gcc-4.7.0, gcc-4.9.0 82 // <future> export changes 83 #if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1) \ 84 && (ATOMIC_INT_LOCK_FREE > 1) 85 #if defined(_GLIBCXX_SHARED) 86 namespace std _GLIBCXX_VISIBILITY(default) 87 { 88 _GLIBCXX_BEGIN_NAMESPACE_VERSION 89 // Replaced by _State_baseV2 in gcc-4.9.0 90 class __future_base::_State_base 91 { 92 typedef _Ptr<_Result_base> _Ptr_type; 93 94 _Ptr_type _M_result; 95 mutex _M_mutex; 96 condition_variable _M_cond; 97 atomic_flag _M_retrieved; 98 once_flag _M_once; 99 public: 100 virtual ~_State_base(); _M_run_deferred()101 virtual void _M_run_deferred() { } 102 }; ~_State_base()103 __future_base::_State_base::~_State_base() { } 104 105 // Replaced by _Async_state_commonV2 in gcc-4.9.0 106 class __future_base::_Async_state_common : public __future_base::_State_base 107 { 108 protected: 109 ~_Async_state_common(); _M_run_deferred()110 virtual void _M_run_deferred() { _M_join(); } _M_join()111 void _M_join() { std::call_once(_M_once, &thread::join, ref(_M_thread)); } 112 thread _M_thread; 113 once_flag _M_once; 114 }; 115 #if defined(_GLIBCXX_HAVE_TLS) 116 // Replaced with inline definition in gcc-4.8.0 ~_Async_state_common()117 __future_base::_Async_state_common::~_Async_state_common() { _M_join(); } 118 119 // Explicit instantiation due to -fno-implicit-instantiation. 120 template void call_once(once_flag&, void (thread::*&&)(), reference_wrapper<thread>&&); 121 template _Bind_simple_helper<void (thread::*)(), reference_wrapper<thread>>::__type __bind_simple(void (thread::*&&)(), reference_wrapper<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