windows-nt/Source/XPSP1/NT/com/mobile/syncmgr/sample/critsect.cpp

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2020-09-26 03:20:57 -05:00
//==========================================================================
//
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
// PURPOSE.
//
// Copyright 1998 - 1999 Microsoft Corporation. All Rights Reserved.
//
//--------------------------------------------------------------------------
#include "precomp.h"
//+---------------------------------------------------------------------------
//
// Member: CLockHandler::CLockHandler, public
//
// Synopsis: Constructor
//
// Arguments:
//
// Returns:
//
// Modifies:
//
//----------------------------------------------------------------------------
CLockHandler::CLockHandler()
{
m_dwLockThreadId = 0;
InitializeCriticalSection(&m_CriticalSection);
}
//+---------------------------------------------------------------------------
//
// Member: CLockHandler::~CLockHandler, public
//
// Synopsis: Destructor
//
// Arguments:
//
// Returns:
//
// Modifies:
//
//----------------------------------------------------------------------------
CLockHandler::~CLockHandler()
{
Assert (0 == m_dwLockThreadId);
DeleteCriticalSection(&m_CriticalSection);
}
//+---------------------------------------------------------------------------
//
// Member: CLockHandler::Lock, public
//
// Synopsis: Adds a lock to the specified class
//
// Arguments:
//
// Returns:
//
// Modifies:
//
//----------------------------------------------------------------------------
void CLockHandler::Lock(DWORD dwThreadId)
{
EnterCriticalSection(&m_CriticalSection);
m_dwLockThreadId = dwThreadId;
}
//+---------------------------------------------------------------------------
//
// Member: CLockHandler::UnLock, public
//
// Synopsis: Removes a lock to the specified class
//
// Arguments:
//
// Returns:
//
// Modifies:
//
//----------------------------------------------------------------------------
void CLockHandler::UnLock()
{
m_dwLockThreadId = 0;
LeaveCriticalSection(&m_CriticalSection);
}