source: xplcommon/src/xplcommon/win32/WaitableEvent.h@ 21:eb59943050c9

// Copyright (c) 2012 by István Váradi

// This file is part of libxplcommon, a common utility library for
// development related to X-Plane

// 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.

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// The views and conclusions contained in the software and documentation are those
// of the authors and should not be interpreted as representing official policies,
// either expressed or implied, of the FreeBSD Project.

#ifndef XPLCOMMON_WIN32_WAITABLEEVENT_H
#define XPLCOMMON_WIN32_WAITABLEEVENT_H
//------------------------------------------------------------------------------

#include "Event.h"
#include "EventFailable.h"

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

namespace xplcommon { namespace win32 {

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

/**
 * An event which can be waited for.
 */
class WaitableEvent : public Event, public EventFailable
{
public:
    /**
     * Construct the event.
     */
    WaitableEvent(Waiter* waiter = 0);

    /**
     * Check if the event is fired or not. If so, the fired status
     * will be cleared.
     */
    bool check();
};

//------------------------------------------------------------------------------
// Inline definitions
//------------------------------------------------------------------------------

inline WaitableEvent::WaitableEvent(Waiter* waiter) :
    Event(static_cast<EventFailable&>(*this))
{
    if (waiter!=0) addTo(*waiter);
}

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

inline bool WaitableEvent::check()
{
    if (isFired()) {
        clear();
        return true;
    } else {
        return false;
    }
}

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

} /* namespace xplcommon::win32 */ } /* namespace xplcommon */

//------------------------------------------------------------------------------
#endif // XPLCOMMON_WIN32_WAITABLEEVENT_H

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