Subversion Repositories Kolibri OS

Rev

Blame | Last modification | View Log | RSS feed

  1. // future -*- C++ -*-
  2.  
  3. // Copyright (C) 2009-2015 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 <future>
  26.  
  27. namespace
  28. {
  29.   struct future_error_category : public std::error_category
  30.   {
  31.     virtual const char*
  32.     name() const noexcept
  33.     { return "future"; }
  34.  
  35.     _GLIBCXX_DEFAULT_ABI_TAG
  36.     virtual std::string message(int __ec) const
  37.     {
  38.       std::string __msg;
  39.       switch (std::future_errc(__ec))
  40.       {
  41.       case std::future_errc::broken_promise:
  42.           __msg = "Broken promise";
  43.           break;
  44.       case std::future_errc::future_already_retrieved:
  45.           __msg = "Future already retrieved";
  46.           break;
  47.       case std::future_errc::promise_already_satisfied:
  48.           __msg = "Promise already satisfied";
  49.           break;
  50.       case std::future_errc::no_state:
  51.           __msg = "No associated state";
  52.           break;
  53.       default:
  54.           __msg = "Unknown error";
  55.           break;
  56.       }
  57.       return __msg;
  58.     }
  59.   };
  60.  
  61.   const future_error_category&
  62.   __future_category_instance() noexcept
  63.   {
  64.     static const future_error_category __fec{};
  65.     return __fec;
  66.   }
  67. }
  68.  
  69. namespace std _GLIBCXX_VISIBILITY(default)
  70. {
  71. _GLIBCXX_BEGIN_NAMESPACE_VERSION
  72.  
  73.   const error_category& future_category() noexcept
  74.   { return __future_category_instance(); }
  75.  
  76.   future_error::~future_error() noexcept { }
  77.  
  78.   const char*
  79.   future_error::what() const noexcept { return logic_error::what(); }
  80.  
  81. #if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1) \
  82.   && (ATOMIC_INT_LOCK_FREE > 1)
  83.   __future_base::_Result_base::_Result_base() = default;
  84.  
  85.   __future_base::_Result_base::~_Result_base() = default;
  86.  
  87.   void
  88.   __future_base::_State_baseV2::_Make_ready::_S_run(void* p)
  89.   {
  90.     unique_ptr<_Make_ready> mr{static_cast<_Make_ready*>(p)};
  91.     if (auto state = mr->_M_shared_state.lock())
  92.       {
  93.         // Use release MO to synchronize with observers of the ready state.
  94.         state->_M_status._M_store_notify_all(_Status::__ready,
  95.             memory_order_release);
  96.       }
  97.   }
  98.  
  99.   // defined in src/c++11/condition_variable.cc
  100.   extern void
  101.   __at_thread_exit(__at_thread_exit_elt* elt);
  102.  
  103.   void
  104.   __future_base::_State_baseV2::_Make_ready::_M_set()
  105.   {
  106.     _M_cb = &_Make_ready::_S_run;
  107.     __at_thread_exit(this);
  108.   }
  109. #endif
  110.  
  111. _GLIBCXX_END_NAMESPACE_VERSION
  112. } // namespace std
  113.