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/* ccapi/common/win/OldCC/autolock.hxx */
/*
* Copyright (C) 1998 by Danilo Almeida. 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.
*
* 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 __AUTOLOCK_HXX__
#define __AUTOLOCK_HXX__
#include <windows.h>
class CcOsLock {
CRITICAL_SECTION cs;
bool valid;
public:
CcOsLock() {InitializeCriticalSection(&cs); valid = true; }
~CcOsLock() {DeleteCriticalSection(&cs); valid = false;}
void lock() {if (valid) EnterCriticalSection(&cs);}
void unlock() {if (valid) LeaveCriticalSection(&cs);}
bool trylock() {return valid ? (TryEnterCriticalSection(&cs) ? true : false)
: false; }
};
class CcAutoLock {
CcOsLock& m_lock;
public:
static void Start(CcAutoLock*& a, CcOsLock& lock) { a = new CcAutoLock(lock); };
static void Stop (CcAutoLock*& a) { delete a; a = 0; };
CcAutoLock(CcOsLock& lock):m_lock(lock) { m_lock.lock(); }
~CcAutoLock() { m_lock.unlock(); }
};
class CcAutoTryLock {
CcOsLock& m_lock;
bool m_locked;
public:
CcAutoTryLock(CcOsLock& lock):m_lock(lock) { m_locked = m_lock.trylock(); }
~CcAutoTryLock() { if (m_locked) m_lock.unlock(); m_locked = false; }
bool IsLocked() const { return m_locked; }
};
#endif /* __AUTOLOCK_HXX */
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