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98 lines
1.6 KiB
C++
98 lines
1.6 KiB
C++
//
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// RWLock_Android.h
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//
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// Library: Foundation
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// Package: Threading
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// Module: RWLock
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//
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// Definition of the RWLockImpl class for Android Threads.
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//
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// Copyright (c) 2004-2011, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#ifndef Foundation_RWLock_Android_INCLUDED
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#define Foundation_RWLock_Android_INCLUDED
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#include "Poco/Foundation.h"
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#include "Poco/Exception.h"
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#include <pthread.h>
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#include <errno.h>
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namespace Poco {
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class Foundation_API RWLockImpl
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{
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protected:
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RWLockImpl();
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~RWLockImpl();
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void readLockImpl();
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bool tryReadLockImpl();
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void writeLockImpl();
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bool tryWriteLockImpl();
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void unlockImpl();
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private:
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pthread_mutex_t _mutex;
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};
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//
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// inlines
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//
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inline void RWLockImpl::readLockImpl()
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{
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if (pthread_mutex_lock(&_mutex))
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throw SystemException("cannot lock reader/writer lock");
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}
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inline bool RWLockImpl::tryReadLockImpl()
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{
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int rc = pthread_mutex_trylock(&_mutex);
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if (rc == 0)
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return true;
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else if (rc == EBUSY)
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return false;
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else
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throw SystemException("cannot lock reader/writer lock");
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}
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inline void RWLockImpl::writeLockImpl()
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{
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if (pthread_mutex_lock(&_mutex))
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throw SystemException("cannot lock reader/writer lock");
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}
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inline bool RWLockImpl::tryWriteLockImpl()
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{
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int rc = pthread_mutex_trylock(&_mutex);
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if (rc == 0)
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return true;
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else if (rc == EBUSY)
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return false;
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else
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throw SystemException("cannot lock reader/writer lock");
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}
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inline void RWLockImpl::unlockImpl()
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{
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if (pthread_mutex_unlock(&_mutex))
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throw SystemException("cannot unlock reader/writer lock");
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}
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} // namespace Poco
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#endif // Foundation_RWLock_Android_INCLUDED
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