DwmConditionVariable.hh

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//===========================================================================
// @(#) $DwmPath: dwm/libDwm/tags/libDwm-0.6.0/include/DwmConditionVariable.hh 8401 $
// @(#) $Id: DwmConditionVariable.hh 8401 2016-04-17 06:44:31Z dwm $
//===========================================================================
//  Copyright (c) Daniel W. McRobb 2004
//  All rights reserved.
//
//  Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions
//  are met:
//
//  1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//  2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//  3. The names of the authors and copyright holders may not be used to
//    endorse or promote products derived from this software without
//    specific prior written permission.
//
//  IN NO EVENT SHALL DANIEL W. MCROBB BE LIABLE TO ANY PARTY FOR
//  DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
//  INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE,
//  EVEN IF DANIEL W. MCROBB HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
//  DAMAGE.
//
//  THE SOFTWARE PROVIDED HEREIN IS ON AN "AS IS" BASIS, AND
//  DANIEL W. MCROBB HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT,
//  UPDATES, ENHANCEMENTS, OR MODIFICATIONS. DANIEL W. MCROBB MAKES NO
//  REPRESENTATIONS AND EXTENDS NO WARRANTIES OF ANY KIND, EITHER 
//  IMPLIED OR EXPRESS, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
//  WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
//  PURPOSE, OR THAT THE USE OF THIS SOFTWARE WILL NOT INFRINGE ANY PATENT,
//  TRADEMARK OR OTHER RIGHTS.
//===========================================================================

//---------------------------------------------------------------------------
//---------------------------------------------------------------------------

#ifndef _DWMCONDITIONVARIABLE_HH_
#define _DWMCONDITIONVARIABLE_HH_

extern "C" {
#include <pthread.h>
}

#include "DwmMutex.hh"

namespace Dwm {

  namespace Pthread {

    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    class ConditionVariable
    {
    public:
      //----------------------------------------------------------------------
      //----------------------------------------------------------------------
      ConditionVariable();

      //----------------------------------------------------------------------
      //----------------------------------------------------------------------
      ~ConditionVariable();

      //----------------------------------------------------------------------
      //----------------------------------------------------------------------
      bool Broadcast();

      //----------------------------------------------------------------------
      //----------------------------------------------------------------------
      bool Signal();

      //----------------------------------------------------------------------
      //----------------------------------------------------------------------
      bool TimedWait(Mutex & mutex, const struct timespec * abstime);

      //----------------------------------------------------------------------
      //----------------------------------------------------------------------
      bool Wait(Mutex & mutex);
     
    protected:
      pthread_cond_t  _cv;
    };
    
  }  // namespace Pthread

}  // namespace Dwm

#endif  // _DWMCONDITIONVARIABLE_HH_

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