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144 lines
3.5 KiB
C++
144 lines
3.5 KiB
C++
//
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// Event.h
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//
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// $Id: //poco/Main/Foundation/include/Poco/Event.h#3 $
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//
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// Library: Foundation
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// Package: Threading
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// Module: Event
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//
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// Definition of the Event class.
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//
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// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#ifndef Foundation_Event_INCLUDED
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#define Foundation_Event_INCLUDED
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#include "Poco/Foundation.h"
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#include "Poco/Exception.h"
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#if defined(POCO_OS_FAMILY_WINDOWS)
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#include "Poco/Event_WIN32.h"
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#else
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#include "Poco/Event_POSIX.h"
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#endif
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namespace Poco {
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class Foundation_API Event: private EventImpl
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/// An Event is a synchronization object that
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/// allows one thread to signal one or more
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/// other threads that a certain event
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/// has happened.
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/// Usually, one thread signals an event,
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/// while one or more other threads wait
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/// for an event to become signalled.
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{
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public:
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Event(bool autoReset = true);
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/// Creates the event. If autoReset is true,
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/// the event is automatically reset after
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/// a wait() successfully returns.
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~Event();
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/// Destroys the event.
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void set();
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/// Signals the event. If autoReset is true,
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/// only one thread waiting for the event
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/// can resume execution.
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/// If autoReset is false, all waiting threads
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/// can resume execution.
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void wait();
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/// Waits for the event to become signalled.
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void wait(long milliseconds);
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/// Waits for the event to become signalled.
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/// Throws a TimeoutException if the event
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/// does not become signalled within the specified
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/// time interval.
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bool tryWait(long milliseconds);
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/// Waits for the event to become signalled.
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/// Returns true if the event
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/// became signalled within the specified
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/// time interval, false otherwise.
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void reset();
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/// Resets the event to unsignalled state.
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private:
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Event(const Event&);
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Event& operator = (const Event&);
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};
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//
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// inlines
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//
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inline void Event::set()
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{
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setImpl();
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}
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inline void Event::wait()
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{
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waitImpl();
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}
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inline void Event::wait(long milliseconds)
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{
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if (!waitImpl(milliseconds))
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throw TimeoutException();
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}
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inline bool Event::tryWait(long milliseconds)
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{
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return waitImpl(milliseconds);
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}
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inline void Event::reset()
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{
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resetImpl();
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}
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} // namespace Poco
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#endif // Foundation_Event_INCLUDED
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