libstdc++-v3/src/condition_variable.cc

   1 // mutex -*- 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 namespace std
  33 {
  34   condition_variable::condition_variable()
  35   {
  36 #if __GTHREAD_HAS_COND
  37 # if defined __GTHREAD_COND_INIT
  38     native_handle_type __tmp = __GTHREAD_COND_INIT;
  39     _M_cond = __tmp;
  40 # else
  41     int __e = __gthread_cond_init(&_M_cond, NULL);
  42     if ( __e)
  43       __throw_system_error(__e);
  44 # endif
  45 #endif
  46   }
  47
  48   condition_variable::~condition_variable()
  49   {
  50 #if __GTHREAD_HAS_COND
  51     // XXX no thread blocked
  52     int __e = pthread_cond_destroy(&_M_cond);
  53     // if __e == EBUSY then blocked
  54 #endif
  55   }
  56
  57   void
  58   condition_variable::notify_one()
  59   {
  60 #if __GTHREAD_HAS_COND
  61     int __e = pthread_cond_signal(&_M_cond);
  62
  63     // XXX not in spec
  64     // EINVAL
  65     if ( __e)
  66       __throw_system_error(__e);
  67 #endif
  68   }
  69
  70   void
  71   condition_variable::notify_all()
  72   {
  73 #if __GTHREAD_HAS_COND
  74     int __e = pthread_cond_broadcast(&_M_cond);
  75
  76     // XXX not in spec
  77     // EINVAL
  78     if ( __e)
  79       __throw_system_error(__e);
  80 #endif
  81   }
  82
  83 }
  84