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// future -*- C++ -*-
 
// Copyright (C) 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
 
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
 
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.
 
#include <future>
 
namespace
{
  struct future_error_category : public std::error_category
  {
    virtual const char*
    name() const noexcept
    { return "future"; }
 
    virtual std::string message(int __ec) const
    {
      std::string __msg;
      switch (std::future_errc(__ec))
      {
      case std::future_errc::broken_promise:
          __msg = "Broken promise";
          break;
      case std::future_errc::future_already_retrieved:
          __msg = "Future already retrieved";
          break;
      case std::future_errc::promise_already_satisfied:
          __msg = "Promise already satisfied";
          break;
      case std::future_errc::no_state:
          __msg = "No associated state";
          break;
      default:
          __msg = "Unknown error";
          break;
      }
      return __msg;
    }
  };
 
  const future_error_category&
  __future_category_instance() noexcept
  {
    static const future_error_category __fec;
    return __fec;
  }
}
 
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
 
  const error_category& future_category() noexcept
  { return __future_category_instance(); }
 
  future_error::~future_error() noexcept { }
 
  const char*
  future_error::what() const noexcept { return _M_code.message().c_str(); }
 
#if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1) \
  && (ATOMIC_INT_LOCK_FREE > 1)
  __future_base::_Result_base::_Result_base() = default;
 
  __future_base::_Result_base::~_Result_base() = default;
 
  __future_base::_State_base::~_State_base() = default;
 
#ifdef _GLIBCXX_HAVE_TLS
  __future_base::_Async_state_common::~_Async_state_common() { _M_join(); }
 
  // Explicit instantiation due to -fno-implicit-instantiation.
  template void call_once(once_flag&, void (thread::*&&)(), reference_wrapper<thread>&&);
  template _Bind_simple_helper<void (thread::*)(), reference_wrapper<thread>>::__type __bind_simple(void (thread::*&&)(), reference_wrapper<thread>&&);
#endif
#endif
 
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
 
// XXX GLIBCXX_ABI Deprecated
// gcc-4.6.0
// <future> export changes
#if defined(_GLIBCXX_SYMVER_GNU) && defined(PIC) \
    && defined(_GLIBCXX_HAVE_AS_SYMVER_DIRECTIVE) \
    && defined(_GLIBCXX_HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT)
 
namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
{
  const std::error_category* future_category = &__future_category_instance();
}
 
#define _GLIBCXX_ASM_SYMVER(cur, old, version) \
   asm (".symver " #cur "," #old "@@@" #version);
 
_GLIBCXX_ASM_SYMVER(_ZN9__gnu_cxx15future_categoryE, _ZSt15future_category, GLIBCXX_3.4.14)
 
#endif