Ejemplo n.º 1
0
ECWAsyncReader::ECWAsyncReader()

{
    hMutex = CPLCreateMutex();
    CPLReleaseMutex( hMutex );

    poFileView = NULL;
    bUpdateReady = FALSE;
    bComplete = FALSE;
}
Ejemplo n.º 2
0
int CPLCreateOrAcquireMutex( void **phMutex, double dfWaitInSeconds )

{
    int bSuccess = FALSE;

#ifndef MUTEX_NONE
    static void *hCOAMutex = NULL;

    /*
    ** ironically, creation of this initial mutex is not threadsafe
    ** even though we use it to ensure that creation of other mutexes
    ** is threadsafe. 
    */
    if( hCOAMutex == NULL )
    {
        hCOAMutex = CPLCreateMutex();
        if (hCOAMutex == NULL)
        {
            *phMutex = NULL;
            return FALSE;
        }
    }
    else
    {
        CPLAcquireMutex( hCOAMutex, dfWaitInSeconds );
    }

    if( *phMutex == NULL )
    {
        *phMutex = CPLCreateMutex();
        bSuccess = *phMutex != NULL;
        CPLReleaseMutex( hCOAMutex );
    }
    else
    {
        CPLReleaseMutex( hCOAMutex );

        bSuccess = CPLAcquireMutex( *phMutex, dfWaitInSeconds );
    }
#endif /* ndef MUTEX_NONE */

    return bSuccess;
}
GDALAbstractBandBlockCache::GDALAbstractBandBlockCache(GDALRasterBand* poBandIn) :
    hSpinLock(CPLCreateLock(LOCK_SPIN)),
    psListBlocksToFree(NULL),
    hCond(CPLCreateCond()),
    hCondMutex(CPLCreateMutex()),
    nKeepAliveCounter(0)
{
    poBand = poBandIn;
    if( hCondMutex )
        CPLReleaseMutex(hCondMutex);
}
Ejemplo n.º 4
0
void  *CPLCreateCond()
{
    Win32Cond* psCond = (Win32Cond*) malloc(sizeof(Win32Cond));
    if (psCond == NULL)
        return NULL;
    psCond->hInternalMutex = CPLCreateMutex();
    if (psCond->hInternalMutex == NULL)
    {
        free(psCond);
        return NULL;
    }
    CPLReleaseMutex(psCond->hInternalMutex);
    psCond->psWaiterList = NULL;
    return psCond;
}
Ejemplo n.º 5
0
VSICurlStreamingHandle::VSICurlStreamingHandle(VSICurlStreamingFSHandler* poFS, const char* pszURL)
{
    this->poFS = poFS;
    this->pszURL = CPLStrdup(pszURL);

#ifdef notdef
    nRecomputedChecksumOfFirst1024Bytes = 0;
#endif
    curOffset = 0;

    poFS->AcquireMutex();
    CachedFileProp* cachedFileProp = poFS->GetCachedFileProp(pszURL);
    eExists = cachedFileProp->eExists;
    fileSize = cachedFileProp->fileSize;
    bHastComputedFileSize = cachedFileProp->bHastComputedFileSize;
    bIsDirectory = cachedFileProp->bIsDirectory;
    poFS->ReleaseMutex();

    bCanTrustCandidateFileSize = TRUE;
    bHasCandidateFileSize = FALSE;
    nCandidateFileSize = 0;

    nCachedSize = 0;
    pCachedData = NULL;

    bEOF = FALSE;

    hCurlHandle = NULL;

    hThread = NULL;
    hRingBufferMutex = CPLCreateMutex();
    ReleaseMutex();
    hCondProducer = CPLCreateCond();
    hCondConsumer = CPLCreateCond();

    bDownloadInProgress = FALSE;
    bDownloadStopped = FALSE;
    bAskDownloadEnd = FALSE;
    nRingBufferFileOffset = 0;

    pabyHeaderData = NULL;
    nHeaderSize = 0;
    nBodySize = 0;
    nHTTPCode = 0;
}
Ejemplo n.º 6
0
int CPLCreateOrAcquireMutex( void **phMutex, double dfWaitInSeconds )

{
    int bSuccess = FALSE;
    static pthread_mutex_t global_mutex = PTHREAD_MUTEX_INITIALIZER;

    pthread_mutex_lock(&global_mutex);
    if( *phMutex == NULL )
    {
        *phMutex = CPLCreateMutex();
        bSuccess = *phMutex != NULL;
        pthread_mutex_unlock(&global_mutex);
    }
    else
    {
        pthread_mutex_unlock(&global_mutex);

        bSuccess = CPLAcquireMutex( *phMutex, dfWaitInSeconds );
    }

    return bSuccess;
}
Ejemplo n.º 7
0
VSICurlStreamingFSHandler::VSICurlStreamingFSHandler()
{
    hMutex = CPLCreateMutex();
    CPLReleaseMutex(hMutex);
}
Ejemplo n.º 8
0
int main( int argc, char ** argv )

{
    int iArg;

/* -------------------------------------------------------------------- */
/*      Process arguments.                                              */
/* -------------------------------------------------------------------- */
    argc = GDALGeneralCmdLineProcessor( argc, &argv, 0 );
    if( argc < 1 )
        exit( -argc );

    for( iArg = 1; iArg < argc; iArg++ )
    {
        if( EQUAL(argv[iArg],"-i") && iArg < argc-1 )
            nIterations = atoi(argv[++iArg]);
        else if( EQUAL(argv[iArg],"-oi") && iArg < argc-1 )
            nOpenIterations = atoi(argv[++iArg]);
        else if( EQUAL(argv[iArg],"-t") && iArg < argc-1 )
            nThreadCount = atoi(argv[++iArg]);
        else if( EQUAL(argv[iArg],"-nlo") )
            bLockOnOpen = FALSE;
        else if( pszFilename == NULL )
            pszFilename = argv[iArg];
        else
        {
            printf( "Unrecognised argument: %s\n", argv[iArg] );
            Usage();
        }
    }

    if( pszFilename == NULL )
    {
        printf( "Need a file to operate on.\n" );
        Usage();
        exit( 1 );
    }

    if( nOpenIterations > 0 )
        bLockOnOpen = FALSE;

/* -------------------------------------------------------------------- */
/*      Get the checksum of band1.                                      */
/* -------------------------------------------------------------------- */
    GDALDatasetH hDS;

    GDALAllRegister();
    hDS = GDALOpen( pszFilename, GA_ReadOnly );
    if( hDS == NULL )
        exit( 1 );

    nChecksum = GDALChecksumImage( GDALGetRasterBand( hDS, 1 ), 
                                   0, 0, 
                                   GDALGetRasterXSize( hDS ), 
                                   GDALGetRasterYSize( hDS ) );
    
    GDALClose( hDS );

    printf( "Got checksum %d, launching %d worker threads on %s, %d iterations.\n", 
            nChecksum, nThreadCount, pszFilename, nIterations );

/* -------------------------------------------------------------------- */
/*      Fire off worker threads.                                        */
/* -------------------------------------------------------------------- */
    int iThread;

    pGlobalMutex = CPLCreateMutex();
    CPLReleaseMutex( pGlobalMutex );

    nPendingThreads = nThreadCount;

    for( iThread = 0; iThread < nThreadCount; iThread++ )
    {
        if( CPLCreateThread( WorkerFunc, NULL ) == -1 )
        {
            printf( "CPLCreateThread() failed.\n" );
            exit( 1 );
        }
    }

    while( nPendingThreads > 0 )
        CPLSleep( 0.5 );

    CPLReleaseMutex( pGlobalMutex );

    printf( "All threads complete.\n" );
    
    CSLDestroy( argv );
    
    GDALDestroyDriverManager();
    
    return 0;
}
Ejemplo n.º 9
0
int main( int argc, char ** argv )

{
/* -------------------------------------------------------------------- */
/*      Process arguments.                                              */
/* -------------------------------------------------------------------- */
    argc = GDALGeneralCmdLineProcessor(argc, &argv, 0);
    if( argc < 1 )
        exit(-argc);

    int nThreadCount = 4;
    bool bOpenInThreads = true;

    for( int iArg = 1; iArg < argc; iArg++ )
    {
        if( iArg < argc-1 && EQUAL(argv[iArg], "-i") )
        {
            nIterations = atoi(argv[++iArg]);
        }
        else if( iArg < argc-1 && EQUAL(argv[iArg], "-oi") )
        {
            nOpenIterations = atoi(argv[++iArg]);
        }
        else if( iArg < argc-1 && EQUAL(argv[iArg], "-t") )
        {
            nThreadCount = atoi(argv[++iArg]);
        }
        else if( EQUAL(argv[iArg], "-lock_on_open") )
        {
            bLockOnOpen = true;
        }
        else if( EQUAL(argv[iArg], "-open_in_main") )
        {
            bOpenInThreads = false;
        }
        else if( pszFilename == nullptr )
        {
            pszFilename = argv[iArg];
        }
        else
        {
            printf("Unrecognized argument: %s\n", argv[iArg]);
            Usage();
        }
    }

    if( pszFilename == nullptr )
    {
        printf("Need a file to operate on.\n");
        Usage();
        exit(1);
    }

    if( nOpenIterations > 0 )
        bLockOnOpen = false;

/* -------------------------------------------------------------------- */
/*      Get the checksum of band1.                                      */
/* -------------------------------------------------------------------- */
    GDALDatasetH hDS = nullptr;

    GDALAllRegister();
    for( int i = 0; i < 2; i++ )
    {
        hDS = GDALOpen( pszFilename, GA_ReadOnly );
        if( hDS == nullptr )
            exit( 1 );

        nChecksum = GDALChecksumImage(GDALGetRasterBand(hDS, 1),
                                      0, 0,
                                      GDALGetRasterXSize(hDS),
                                      GDALGetRasterYSize(hDS));

        GDALClose(hDS);
    }

    printf(
        "Got checksum %d, launching %d worker threads on %s, %d iterations.\n",
        nChecksum, nThreadCount, pszFilename, nIterations);

/* -------------------------------------------------------------------- */
/*      Fire off worker threads.                                        */
/* -------------------------------------------------------------------- */
    pGlobalMutex = CPLCreateMutex();
    CPLReleaseMutex(pGlobalMutex);

    nPendingThreads = nThreadCount;

    std::vector<GDALDatasetH> aoDS;
    for( int iThread = 0; iThread < nThreadCount; iThread++ )
    {
        hDS = nullptr;
        if( !bOpenInThreads )
        {
            hDS = GDALOpen(pszFilename, GA_ReadOnly);
            if( !hDS )
            {
                printf("GDALOpen() failed.\n");
                exit(1);
            }
            aoDS.push_back(hDS);
        }
        if( CPLCreateThread(WorkerFunc, hDS) == -1 )
        {
            printf("CPLCreateThread() failed.\n");
            exit(1);
        }
    }

    while( nPendingThreads > 0 )
        CPLSleep(0.5);

    CPLDestroyMutex(pGlobalMutex);

    for( size_t i = 0; i < aoDS.size(); ++i )
        GDALClose(aoDS[i]);

    printf("All threads complete.\n");

    CSLDestroy(argv);

    GDALDestroyDriverManager();

    return 0;
}