1 // Compatibility symbols for previous versions, C++0x bits -*- C++ -*- 2 3 // Copyright (C) 2009-2018 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(); 102 virtual void _M_run_deferred() { } 103 }; 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(); 111 virtual void _M_run_deferred() { _M_join(); } 112 void _M_join() { std::call_once(_M_once, &thread::join, ref(_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-4.8.0 118 __future_base::_Async_state_common::~_Async_state_common() { _M_join(); } 119 120 template<typename _Tp> 121 struct _Maybe_wrap_member_pointer; 122 123 template<typename _Tp, typename _Class> 124 struct _Maybe_wrap_member_pointer<_Tp _Class::*> 125 { 126 typedef _Mem_fn<_Tp _Class::*> type; 127 128 static constexpr type 129 __do_wrap(_Tp _Class::* __pm) 130 { return type(__pm); } 131 }; 132 133 template<typename _Signature> 134 struct _Bind_simple; 135 136 template<typename _Callable, typename... _Args> 137 struct _Bind_simple<_Callable(_Args...)> 138 { 139 typedef typename result_of<_Callable(_Args...)>::type result_type; 140 141 template<typename _Tp, typename... _Up> 142 explicit 143 _Bind_simple(_Tp&& __f, _Up&&... __args) 144 : _M_bound(std::forward<_Tp>(__f), std::forward<_Up>(__args)...) 145 { } 146 147 _Bind_simple(const _Bind_simple&) = default; 148 _Bind_simple(_Bind_simple&&) = default; 149 150 result_type 151 operator()() 152 { 153 typedef typename _Build_index_tuple<sizeof...(_Args)>::__type _Indices; 154 return _M_invoke(_Indices()); 155 } 156 157 private: 158 template<std::size_t... _Indices> 159 typename result_of<_Callable(_Args...)>::type 160 _M_invoke(_Index_tuple<_Indices...>) 161 { 162 // std::bind always forwards bound arguments as lvalues, 163 // but this type can call functions which only accept rvalues. 164 return std::forward<_Callable>(std::get<0>(_M_bound))( 165 std::forward<_Args>(std::get<_Indices+1>(_M_bound))...); 166 } 167 168 std::tuple<_Callable, _Args...> _M_bound; 169 }; 170 171 template<typename _Func, typename... _BoundArgs> 172 struct _Bind_simple_helper 173 { 174 typedef _Maybe_wrap_member_pointer<typename decay<_Func>::type> 175 __maybe_type; 176 typedef typename __maybe_type::type __func_type; 177 typedef _Bind_simple<__func_type(typename decay<_BoundArgs>::type...)> 178 __type; 179 }; 180 181 // Simplified version of std::bind for internal use, without support for 182 // unbound arguments, placeholders or nested bind expressions. 183 template<typename _Callable, typename... _Args> 184 typename _Bind_simple_helper<_Callable, _Args...>::__type 185 __bind_simple(_Callable&& __callable, _Args&&... __args) 186 { 187 typedef _Bind_simple_helper<_Callable, _Args...> __helper_type; 188 typedef typename __helper_type::__maybe_type __maybe_type; 189 typedef typename __helper_type::__type __result_type; 190 return __result_type( 191 __maybe_type::__do_wrap( std::forward<_Callable>(__callable)), 192 std::forward<_Args>(__args)...); 193 } 194 195 // Explicit instantiation due to -fno-implicit-instantiation. 196 template void call_once(once_flag&, void (thread::*&&)(), reference_wrapper<thread>&&); 197 template _Bind_simple_helper<void (thread::*)(), reference_wrapper<thread>>::__type __bind_simple(void (thread::*&&)(), reference_wrapper<thread>&&); 198 #endif // _GLIBCXX_HAVE_TLS 199 _GLIBCXX_END_NAMESPACE_VERSION 200 } // namespace std 201 #endif // _GLIBCXX_SHARED 202 #endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1 203