libstdc++-v3/src/condition_variable.cc

   1 // condition_variable -*- C++ -*-
   2
   3 // Copyright (C) 2008 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 2, 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 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 #include <condition_variable>
  31
  32 #if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)
  33
  34 namespace std
  35 {
  36   condition_variable::condition_variable()
  37   {
  38 #ifdef __GTHREAD_COND_INIT
  39     __gthread_cond_t __tmp = __GTHREAD_COND_INIT;
  40     _M_cond = __tmp;
  41 #else
  42     int __e = __gthread_cond_init(&_M_cond, NULL);
  43
  44     if (__e)
  45       __throw_system_error(__e);
  46 #endif
  47   }
  48
  49   condition_variable::~condition_variable()
  50   {
  51     // XXX no thread blocked
  52     /* int __e = */ __gthread_cond_destroy(&_M_cond);
  53     // if __e == EBUSY then blocked
  54   }
  55
  56   void
  57   condition_variable::wait(unique_lock<mutex>& __lock)
  58   {
  59     int __e = __gthread_cond_wait(&_M_cond, __lock.mutex()->native_handle());
  60
  61     if (__e)
  62       __throw_system_error(__e);
  63   }
  64
  65   void
  66   condition_variable::notify_one()
  67   {
  68     lock_guard<mutex> __lock(_M_internal_mutex);
  69     int __e = __gthread_cond_signal(&_M_cond);
  70
  71     // XXX not in spec
  72     // EINVAL
  73     if (__e)
  74       __throw_system_error(__e);
  75   }
  76
  77   void
  78   condition_variable::notify_all()
  79   {
  80     lock_guard<mutex> __lock(_M_internal_mutex);
  81     int __e = __gthread_cond_broadcast(&_M_cond);
  82
  83     // XXX not in spec
  84     // EINVAL
  85     if (__e)
  86       __throw_system_error(__e);
  87   }
  88
  89   condition_variable_any::condition_variable_any()
  90   {
  91 #ifdef __GTHREAD_COND_INIT
  92     __gthread_cond_t __tmp = __GTHREAD_COND_INIT;
  93     _M_cond = __tmp;
  94 #else
  95     int __e = __gthread_cond_init(&_M_cond, NULL);
  96
  97     if (__e)
  98       __throw_system_error(__e);
  99 #endif
 100   }
 101
 102   condition_variable_any::~condition_variable_any()
 103   {
 104     __gthread_cond_destroy(&_M_cond);
 105   }
 106 }
 107
 108 #endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1