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NamedEvent.h

//
// NamedEvent.h
//
// $Id: //poco/1.4/Foundation/include/Poco/NamedEvent.h#2 $
//
// Library: Foundation
// Package: Processes
// Module:  NamedEvent
//
// Definition of the NamedEvent class.
//
// 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_NamedEvent_INCLUDED
#define Foundation_NamedEvent_INCLUDED


#include "Poco/Foundation.h"


#if defined(POCO_OS_FAMILY_WINDOWS) && defined(POCO_WIN32_UTF8)
#include "Poco/NamedEvent_WIN32U.h"
#elif defined(POCO_OS_FAMILY_WINDOWS)
#include "Poco/NamedEvent_WIN32.h"
#elif defined(POCO_ANDROID)
#include "Poco/NamedEvent_Android.h"
#elif defined(POCO_OS_FAMILY_UNIX)
#include "Poco/NamedEvent_UNIX.h"
#else
#include "Poco/NamedEvent_VMS.h"
#endif


namespace Poco {


00062 class Foundation_API NamedEvent: public NamedEventImpl
      /// An NamedEvent is a global synchronization object 
      /// that allows one process or thread to signal an
      /// other process or thread that a certain event
      /// has happened.
      ///
      /// Unlike an Event, which itself is the unit of synchronization,
      /// a NamedEvent refers to a named operating system resource being the
      /// unit of synchronization.
      /// In other words, there can be multiple instances of NamedEvent referring
      /// to the same actual synchronization object.
      ///
      /// NamedEvents are always autoresetting.
      ///
      /// There should not be more than one instance of NamedEvent for
      /// a given name in a process. Otherwise, the instances may
      /// interfere with each other.
{
public:
      NamedEvent(const std::string& name);
            /// Creates the event.
            
      ~NamedEvent();
            /// Destroys the event.

      void set();
            /// Signals the event. 
            /// The one thread or process waiting for the event 
            /// can resume execution.

      void wait();
            /// Waits for the event to become signalled.

private:
      NamedEvent();
      NamedEvent(const NamedEvent&);
      NamedEvent& operator = (const NamedEvent&);
};


//
// inlines
//
00105 inline void NamedEvent::set()
{
      setImpl();
}


00111 inline void NamedEvent::wait()
{
      waitImpl();
}


} // namespace Poco


#endif // Foundation_NamedEvent_INCLUDED

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