CPLMutexHolder::CPLMutexHolder( void **phMutex, double dfWaitInSeconds,
const char *pszFileIn,
int nLineIn )
{
#ifndef MUTEX_NONE
pszFile = pszFileIn;
nLine = nLineIn;
#ifdef DEBUG_MUTEX
CPLDebug( "MH", "Request %p for pid %ld at %d/%s",
*phMutex, (long) CPLGetPID(), nLine, pszFile );
#endif
if( !CPLCreateOrAcquireMutex( phMutex, dfWaitInSeconds ) )
{
CPLDebug( "CPLMutexHolder", "failed to acquire mutex!" );
hMutex = NULL;
}
else
{
#ifdef DEBUG_MUTEX
CPLDebug( "MH", "Acquired %p for pid %ld at %d/%s",
*phMutex, (long) CPLGetPID(), nLine, pszFile );
#endif
hMutex = *phMutex;
}
#endif /* ndef MUTEX_NONE */
}
CPLMutexHolder::CPLMutexHolder( void **phMutex, double dfWaitInSeconds,
const char *pszFileIn,
int nLineIn )
{
#ifndef MUTEX_NONE
pszFile = pszFileIn;
nLine = nLineIn;
#ifdef DEBUG_MUTEX
/*
* XXX: There is no way to use CPLDebug() here because it works with
* mutexes itself so we will fall in infinite recursion. Good old
* fprintf() will do the job right.
*/
fprintf( stderr,
"CPLMutexHolder: Request %p for pid %ld at %d/%s.\n",
*phMutex, (long) CPLGetPID(), nLine, pszFile );
#endif
if( !CPLCreateOrAcquireMutex( phMutex, dfWaitInSeconds ) )
{
fprintf( stderr, "CPLMutexHolder: Failed to acquire mutex!\n" );
hMutex = NULL;
}
else
{
#ifdef DEBUG_MUTEX
fprintf( stderr,
"CPLMutexHolder: Acquired %p for pid %ld at %d/%s.\n",
*phMutex, (long) CPLGetPID(), nLine, pszFile );
#endif
hMutex = *phMutex;
}
#endif /* ndef MUTEX_NONE */
}