libstdc++-v3/src/condition_variable.cc

   1 // condition_variable -*- C++ -*-
   2
   3 // Copyright (C) 2008, 2009, 2010 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 <condition_variable>
  26
  27 #if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)
  28
  29 namespace std _GLIBCXX_VISIBILITY(default)
  30 {
  31 _GLIBCXX_BEGIN_NAMESPACE_VERSION
  32
  33 #ifdef __GTHREAD_COND_INIT
  34   condition_variable::condition_variable() noexcept = default;
  35   condition_variable::~condition_variable() noexcept = default;
  36 #else
  37   condition_variable::condition_variable() noexcept
  38   {
  39     int __e = __gthread_cond_init(&_M_cond, 0);
  40
  41     if (__e)
  42       __throw_system_error(__e);
  43   }
  44
  45   condition_variable::~condition_variable() noexcept
  46   {
  47     // XXX no thread blocked
  48     /* int __e = */ __gthread_cond_destroy(&_M_cond);
  49     // if __e == EBUSY then blocked
  50   }
  51 #endif
  52
  53   void
  54   condition_variable::wait(unique_lock<mutex>& __lock)
  55   {
  56     int __e = __gthread_cond_wait(&_M_cond, __lock.mutex()->native_handle());
  57
  58     if (__e)
  59       __throw_system_error(__e);
  60   }
  61
  62   void
  63   condition_variable::notify_one() noexcept
  64   {
  65     int __e = __gthread_cond_signal(&_M_cond);
  66
  67     // XXX not in spec
  68     // EINVAL
  69     if (__e)
  70       __throw_system_error(__e);
  71   }
  72
  73   void
  74   condition_variable::notify_all() noexcept
  75   {
  76     int __e = __gthread_cond_broadcast(&_M_cond);
  77
  78     // XXX not in spec
  79     // EINVAL
  80     if (__e)
  81       __throw_system_error(__e);
  82   }
  83
  84   condition_variable_any::condition_variable_any() noexcept = default;
  85
  86   condition_variable_any::~condition_variable_any() noexcept = default;
  87
  88 _GLIBCXX_END_NAMESPACE_VERSION
  89 } // namespace
  90
  91 #endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1