MediumLock.cpp revision 6d6bae86347dd2fc643bbc80829f0fa36aec4f8d
/** @file
*
* Medium lock management helper classes
*/
/*
* Copyright (C) 2010 Sun Microsystems, Inc.
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 USA or visit http://www.sun.com if you need
* additional information or have any questions.
*/
#include "MediumLock.h"
#include "MediumImpl.h"
#include "MediumAttachmentImpl.h"
mIsLocked(false), mLockSkipped(false)
{
}
MediumLock::~MediumLock()
{
Unlock();
}
{
}
mIsLocked(false), mLockSkipped(false)
{
}
{
if (aLockWrite == mLockWrite)
return S_OK;
if (mIsLocked)
{
{
Lock();
return rc;
}
{
mLockWrite = !mLockWrite;
Lock();
return rc;
}
return S_OK;
}
return S_OK;
}
{
return mMedium;
}
bool MediumLock::GetLockRequest() const
{
return mLockWrite;
}
{
if (mIsLocked)
return S_OK;
{
return VBOX_E_INVALID_OBJECT_STATE;
}
{
}
switch (state)
{
case MediumState_NotCreated:
case MediumState_Creating:
case MediumState_Deleting:
mLockSkipped = true;
break;
default:
if (mLockWrite)
else
}
{
mIsLocked = true;
return S_OK;
}
else
{
return VBOX_E_INVALID_OBJECT_STATE;
}
}
{
if (mIsLocked && !mLockSkipped)
{
if (mLockWrite)
else
}
mLockSkipped = false;
mIsLocked = false;
return rc;
}
{
mIsLocked = false;
}
{
Clear();
// rest is done by the list object's destructor
}
bool MediumLockList::IsEmpty()
{
return mMediumLocks.empty();
}
{
if (mIsLocked)
return VBOX_E_INVALID_OBJECT_STATE;
return S_OK;
}
{
if (mIsLocked)
return VBOX_E_INVALID_OBJECT_STATE;
return S_OK;
}
{
it++)
{
}
return VBOX_E_INVALID_OBJECT_STATE;
}
{
return rc;
}
{
return rc;
}
{
return mMediumLocks.begin();
}
{
return mMediumLocks.end();
}
{
if (mIsLocked)
return S_OK;
it++)
{
{
it2++)
{
}
break;
}
}
mIsLocked = true;
return rc;
}
{
if (!mIsLocked)
return S_OK;
it++)
{
}
mIsLocked = false;
return rc;
}
{
mIsLocked = false;
}
{
Clear();
// rest is done by the map object's destructor
}
bool MediumLockListMap::IsEmpty()
{
return mMediumLocks.empty();
}
{
if (mIsLocked)
return VBOX_E_INVALID_OBJECT_STATE;
return S_OK;
}
{
return VBOX_E_INVALID_OBJECT_STATE;
return S_OK;
}
{
return VBOX_E_INVALID_OBJECT_STATE;
return S_OK;
}
{
)
{
// need an incremented iterator as otherwise erasing invalidates it
delete pMediumLockList;
}
return rc;
}
{
{
return VBOX_E_INVALID_OBJECT_STATE;
}
return S_OK;
}
{
if (mIsLocked)
return S_OK;
it++)
{
{
it2++)
{
}
break;
}
}
mIsLocked = true;
return rc;
}
{
if (!mIsLocked)
return S_OK;
it++)
{
}
mIsLocked = false;
return rc;
}