//
  // Event_POSIX.h
  //
  // $Id:\; //poco/1.3/Foundation/include/Poco/Event\_POSIX.h\#1$
  //
  // Library: Foundation
  // Package: Threading
  // Module:  Event
  //
  // Definition of the EventImpl class for POSIX Threads.
  //
  // Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
  // and Contributors.
  //
  // Permission is hereby granted, free of charge, to any person or organization
  // obtaining a copy of the software and accompanying documentation covered by
  // this license (the "Software") to use, reproduce, display, distribute,
  // execute, and transmit the Software, and to prepare derivative works of the
  // Software, and to permit third-parties to whom the Software is furnished to
  // do so, all subject to the following:
  // 
  // The copyright notices in the Software and this entire statement, including
  // the above license grant, this restriction and the following disclaimer,
  // must be included in all copies of the Software, in whole or in part, and
  // all derivative works of the Software, unless such copies or derivative
  // works are solely in the form of machine-executable object code generated by
  // a source language processor.
  // 
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
  // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
  // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
  // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  // DEALINGS IN THE SOFTWARE.
  //
  
  ifndef Foundation_Event_POSIX_INCLUDED
  define Foundation_Event_POSIX_INCLUDED
  
  include "Poco/Foundation.h"
  include "Poco/Exception.h"
  include <pthread.h>
  include <errno.h>
  
  namespace Poco {
  
  class Foundation_API EventImpl
  {
  protected:
          EventImpl(bool autoReset);                
          ~EventImpl();
          void setImpl();
          void waitImpl();
          bool waitImpl(long milliseconds);
          void resetImpl();
          
  private:
          bool            _auto;
          volatile bool   _state;
          pthread_mutex_t _mutex;
          pthread_cond_t  _cond;
  };
  
  //
  // inlines
  //
  inline void EventImpl::setImpl()
  {
          if (pthread_mutex_lock(&_mutex))        
                  throw SystemException("cannot signal event (lock)");
          _state = true;
          if (pthread_cond_broadcast(&_cond))
          {
                  pthread_mutex_unlock(&_mutex);
                  throw SystemException("cannot signal event");
          }
          pthread_mutex_unlock(&_mutex);
  }
  
  inline void EventImpl::resetImpl()
  {
          if (pthread_mutex_lock(&_mutex))        
                  throw SystemException("cannot reset event");
          _state = false;
          pthread_mutex_unlock(&_mutex);
  }
  
  } // namespace Poco
  
  endif // Foundation_Event_POSIX_INCLUDED