You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
157 lines
4.4 KiB
157 lines
4.4 KiB
// -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
|
|
// vim:tabstop=4:shiftwidth=4:expandtab:
|
|
|
|
/*
|
|
* Copyright (C) 2004-2008 Wu Yongwei <adah at users dot sourceforge dot net>
|
|
*
|
|
* This software is provided 'as-is', without any express or implied
|
|
* warranty. In no event will the authors be held liable for any
|
|
* damages arising from the use of this software.
|
|
*
|
|
* Permission is granted to anyone to use this software for any purpose,
|
|
* including commercial applications, and to alter it and redistribute
|
|
* it freely, subject to the following restrictions:
|
|
*
|
|
* 1. The origin of this software must not be misrepresented; you must
|
|
* not claim that you wrote the original software. If you use this
|
|
* software in a product, an acknowledgement in the product
|
|
* documentation would be appreciated but is not required.
|
|
* 2. Altered source versions must be plainly marked as such, and must
|
|
* not be misrepresented as being the original software.
|
|
* 3. This notice may not be removed or altered from any source
|
|
* distribution.
|
|
*
|
|
* This file is part of Stones of Nvwa:
|
|
* http://sourceforge.net/projects/nvwa
|
|
*
|
|
*/
|
|
|
|
/*!
|
|
* \file object_level_lock.h
|
|
* \ingroup QxMemLeak
|
|
*
|
|
* In essence Loki ObjectLevelLockable re-engineered to use a fast_mutex
|
|
* class. Check also Andrei Alexandrescu's article <a
|
|
* href="http://www.awprofessional.com/articles/article.asp?p=25298">
|
|
* "Multithreading and the C++ Type System"</a> for the ideas behind.
|
|
*
|
|
* \version 1.4, 2004/05/09
|
|
* \author Wu Yongwei
|
|
*
|
|
*/
|
|
|
|
#ifndef QT_NO_DEBUG
|
|
#ifndef _QX_MODE_RELEASE
|
|
#if _QX_USE_MEM_LEAK_DETECTION
|
|
|
|
#ifndef _OBJECT_LEVEL_LOCK_H
|
|
#define _OBJECT_LEVEL_LOCK_H
|
|
|
|
#ifdef _MSC_VER
|
|
#pragma once
|
|
#endif
|
|
|
|
#include "fast_mutex.h"
|
|
|
|
namespace qx {
|
|
namespace memory {
|
|
|
|
# ifdef _NOTHREADS
|
|
/**
|
|
* Helper class for object-level locking. This is the
|
|
* single-threaded implementation.
|
|
*/
|
|
template <class _Host>
|
|
class object_level_lock
|
|
{
|
|
public:
|
|
/** Type that provides locking/unlocking semantics. */
|
|
class lock
|
|
{
|
|
#ifndef _QX_MODE_RELEASE
|
|
#ifndef QT_NO_DEBUG
|
|
const object_level_lock& _M_host;
|
|
#endif // QT_NO_DEBUG
|
|
#endif // _QX_MODE_RELEASE
|
|
lock(const lock&);
|
|
lock& operator=(const lock&);
|
|
public:
|
|
explicit lock(const object_level_lock& __host)
|
|
#ifndef _QX_MODE_RELEASE
|
|
#ifndef QT_NO_DEBUG
|
|
: _M_host(__host)
|
|
#endif // QT_NO_DEBUG
|
|
#endif // _QX_MODE_RELEASE
|
|
{}
|
|
#ifndef _QX_MODE_RELEASE
|
|
#ifndef QT_NO_DEBUG
|
|
// The purpose of this method is allow one to write code
|
|
// like "assert(guard.get_locked_object() == this)" to
|
|
// ensure that the locked object is exactly the object being
|
|
// accessed.
|
|
const object_level_lock* get_locked_object() const
|
|
{
|
|
return &_M_host;
|
|
}
|
|
#endif // QT_NO_DEBUG
|
|
#endif // _QX_MODE_RELEASE
|
|
};
|
|
|
|
typedef _Host volatile_type;
|
|
};
|
|
# else
|
|
/**
|
|
* Helper class for class-level locking. This is the multi-threaded
|
|
* implementation.
|
|
*/
|
|
template <class _Host>
|
|
class object_level_lock
|
|
{
|
|
mutable fast_mutex _M_mtx;
|
|
|
|
public:
|
|
class lock;
|
|
friend class lock;
|
|
|
|
/** Type that provides locking/unlocking semantics. */
|
|
class lock
|
|
{
|
|
const object_level_lock& _M_host;
|
|
|
|
lock(const lock&);
|
|
lock& operator=(const lock&);
|
|
public:
|
|
explicit lock(const object_level_lock& __host) : _M_host(__host)
|
|
{
|
|
_M_host._M_mtx.lock();
|
|
}
|
|
~lock()
|
|
{
|
|
_M_host._M_mtx.unlock();
|
|
}
|
|
#ifndef _QX_MODE_RELEASE
|
|
#ifndef QT_NO_DEBUG
|
|
// The purpose of this method is allow one to write code
|
|
// like "assert(guard.get_locked_object() == this)" to
|
|
// ensure that the locked object is exactly the object being
|
|
// accessed.
|
|
const object_level_lock* get_locked_object() const
|
|
{
|
|
return &_M_host;
|
|
}
|
|
#endif // QT_NO_DEBUG
|
|
#endif // _QX_MODE_RELEASE
|
|
};
|
|
|
|
typedef volatile _Host volatile_type;
|
|
};
|
|
# endif // _NOTHREADS
|
|
|
|
} // namespace memory
|
|
} // namespace qx
|
|
|
|
#endif // _OBJECT_LEVEL_LOCK_H
|
|
#endif // _QX_USE_MEM_LEAK_DETECTION
|
|
#endif // _QX_MODE_RELEASE
|
|
#endif // QT_NO_DEBUG
|