Leaked source code of windows server 2003
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/*++
Copyright (c) 1999 Microsoft Corporation
Module Name:
mprlock.cxx
Abstract:
Contains code for the MPR provider database manager. This file
contains the following classes:
CMPRProviderLock
Author:
Jonathan Schwartz (jschwart) 19-May-1999
Environment:
User Mode -Win32
Revision History:
19-May-1999 jschwart
Created, converted from \nt\private\windows\screg\sc\server\lock.cxx.
--*/
//
// INCLUDES
//
#include "precomp.hxx"
//
// Macros
//
#define LOCK_LOG(string) MPR_LOG3(LOCKS, " %s" string " level = %ld\n", \
_ShortName, _Name, CurrentLevel())
//
// Globals
//
CProviderLock MPRProviderLock;
/*************************************************************************/
/* CCountingResource methods */
/*************************************************************************/
#if DBG
void
CCountingResource::GetShared()
{
LOCK_LOG(" Asking for %s lock shared...");
ASSERT(!HaveExclusive());
RtlAcquireResourceShared(&_Lock, TRUE);
SetCurrentLevel(CurrentLevel() + 1);
LOCK_LOG("+Acquired %s lock shared,");
}
void
CCountingResource::GetExclusive()
{
LOCK_LOG(" Asking for %s lock exclusive...");
ASSERT(!Have() || HaveExclusive());
RtlAcquireResourceExclusive(&_Lock, TRUE);
SetCurrentLevel(CurrentLevel() - 1);
LOCK_LOG("+Acquired %s lock exclusive,");
}
void
CCountingResource::Release()
{
LOCK_LOG("-Releasing %s lock...");
ASSERT(Have());
RtlReleaseResource( &_Lock );
if (CurrentLevel() > 0)
{
SetCurrentLevel(CurrentLevel() - 1);
}
else
{
SetCurrentLevel(CurrentLevel() + 1);
}
LOCK_LOG(" Released %s lock,");
}
#endif // DBG