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154 lines
3.9 KiB
C++
154 lines
3.9 KiB
C++
//
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// SynchronizedObject.h
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//
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// $Id: //poco/svn/Foundation/include/Poco/SynchronizedObject.h#2 $
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//
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// Library: Foundation
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// Package: Threading
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// Module: SynchronizedObject
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//
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// Definition of the SynchronizedObject 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_SynchronizedObject_INCLUDED
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#define Foundation_SynchronizedObject_INCLUDED
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#include "Poco/Foundation.h"
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#include "Poco/Mutex.h"
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#include "Poco/Event.h"
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namespace Poco {
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class Foundation_API SynchronizedObject
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/// This class aggregates a Mutex and an Event
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/// and can act as a base class for all objects
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/// requiring synchronization in a multithreaded
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/// scenario.
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{
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public:
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typedef Poco::ScopedLock<SynchronizedObject> ScopedLock;
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SynchronizedObject();
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/// Creates the object.
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virtual ~SynchronizedObject();
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/// Destroys the object.
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void lock() const;
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/// Locks the object. Blocks if the object
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/// is locked by another thread.
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bool tryLock() const;
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/// Tries to lock the object. Returns false immediately
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/// if the object is already locked by another thread
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/// Returns true if the object was successfully locked.
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void unlock() const;
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/// Unlocks the object so that it can be locked by
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/// other threads.
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void notify() const;
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/// Signals the object.
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/// Exactly only one thread waiting for the object
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/// can resume execution.
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void wait() const;
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/// Waits for the object to become signalled.
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void wait(long milliseconds) const;
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/// Waits for the object to become signalled.
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/// Throws a TimeoutException if the object
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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) const;
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/// Waits for the object to become signalled.
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/// Returns true if the object
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/// became signalled within the specified
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/// time interval, false otherwise.
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private:
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mutable Mutex _mutex;
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mutable Event _event;
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};
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//
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// inlines
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//
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inline void SynchronizedObject::lock() const
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{
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_mutex.lock();
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}
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inline bool SynchronizedObject::tryLock() const
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{
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return _mutex.tryLock();
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}
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inline void SynchronizedObject::unlock() const
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{
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_mutex.unlock();
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}
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inline void SynchronizedObject::notify() const
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{
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_event.set();
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}
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inline void SynchronizedObject::wait() const
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{
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_event.wait();
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}
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inline void SynchronizedObject::wait(long milliseconds) const
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{
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_event.wait(milliseconds);
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}
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inline bool SynchronizedObject::tryWait(long milliseconds) const
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{
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return _event.tryWait(milliseconds);
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}
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} // namespace Poco
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#endif // Foundation_SynchronizedObject_INCLUDED
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