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/*
* Copyright (c) 2014, Ford Motor Company
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 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.
*
* Neither the name of the Ford Motor Company nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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 HOLDER 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.
*/
#ifndef SRC_COMPONENTS_UTILS_INCLUDE_UTILS_RWLOCK_H_
#define SRC_COMPONENTS_UTILS_INCLUDE_UTILS_RWLOCK_H_
#if defined(OS_POSIX)
#include <pthread.h>
#endif
#include "utils/macro.h"
namespace sync_primitives {
namespace impl {
#if defined(OS_POSIX)
typedef pthread_rwlock_t PlatformRWLock;
#else
#error Please implement rwlock for your OS
#endif
} // namespace impl
class RWLock {
public:
RWLock();
~RWLock();
void AcquireForReading();
void AcquireForWriting();
void Release();
private:
impl::PlatformRWLock rwlock_;
};
class AutoReadLock {
public:
explicit AutoReadLock(RWLock& rwlock) : rwlock_(rwlock) {
rwlock_.AcquireForReading();
}
~AutoReadLock() {
rwlock_.Release();
}
private:
RWLock& rwlock_;
DISALLOW_COPY_AND_ASSIGN(AutoReadLock);
};
class AutoWriteLock {
public:
explicit AutoWriteLock(RWLock& rwlock) : rwlock_(rwlock) {
rwlock_.AcquireForWriting();
}
~AutoWriteLock() {
rwlock_.Release();
}
private:
RWLock& rwlock_;
DISALLOW_COPY_AND_ASSIGN(AutoWriteLock);
};
} // namespace sync_primitives
#endif // SRC_COMPONENTS_UTILS_INCLUDE_UTILS_RWLOCK_H_
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