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