tenfourfox/dom/camera/AutoRwLock.h
Cameron Kaiser c9b2922b70 hello FPR
2017-04-19 00:56:45 -07:00

50 lines
899 B
C++

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef RWLOCK_AUTO_ENTER_H
#define RWLOCK_AUTO_ENTER_H
#include "prrwlock.h"
#include "mozilla/Assertions.h"
class RwLockAutoEnterRead
{
public:
explicit RwLockAutoEnterRead(PRRWLock* aRwLock)
: mRwLock(aRwLock)
{
MOZ_ASSERT(mRwLock);
PR_RWLock_Rlock(mRwLock);
}
~RwLockAutoEnterRead()
{
PR_RWLock_Unlock(mRwLock);
}
protected:
PRRWLock* mRwLock;
};
class RwLockAutoEnterWrite
{
public:
explicit RwLockAutoEnterWrite(PRRWLock* aRwLock)
: mRwLock(aRwLock)
{
MOZ_ASSERT(mRwLock);
PR_RWLock_Wlock(mRwLock);
}
~RwLockAutoEnterWrite()
{
PR_RWLock_Unlock(mRwLock);
}
protected:
PRRWLock* mRwLock;
};
#endif // RWLOCK_AUTO_ENTER_H