compatibility-thread-c++0x.cc revision 1.1.1.4 
1// Compatibility symbols for previous versions, C++0x bits -*- C++ -*-
2
3// Copyright (C) 2009-2017 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
48namespace __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
65namespace __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)
87namespace 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