Function TEST

autotest/cpp/testblockcachelimits.cpp:76–154

// ---------------------------------------------------------------------------

TEST(testblockcachelimits, test)
{
    CPLJoinableThread *hThread;

    // CPLSetConfigOption("CPL_DEBUG", "ON");

    printf("main thread %p\n", (void *)CPLGetPID());

    CPLSetConfigOption("GDAL_CACHEMAX", "0");
    CPLSetConfigOption("GDAL_DEBUG_BLOCK_CACHE", "ON");
    GDALAllRegister();

    GDALDatasetH hDS = GDALOpen(GCORE_DATA_DIR "byte.tif", GA_ReadOnly);

    char buf[20 * 20];
    printf("cache fill\n");
    CPL_IGNORE_RET_VAL(GDALRasterIO(GDALGetRasterBand(hDS, 1), GF_Read, 0, 0,
                                    20, 20, buf, 20, 20, GDT_Byte, 0, 0));
    printf("end of cache fill\n");
    printf("buf[0]=%d\n\n", (int)buf[0]);

    hThread = CPLCreateJoinableThread(thread_func, nullptr);
    CPLSleep(0.3);

    printf("re read block\n");
    CPL_IGNORE_RET_VAL(GDALRasterIO(GDALGetRasterBand(hDS, 1), GF_Read, 0, 0,
                                    20, 20, buf, 20, 20, GDT_Byte, 0, 0));
    printf("end of re read block\n");
    printf("buf[0]=%d\n", (int)buf[0]);
    CPLJoinThread(hThread);

    hThread = CPLCreateJoinableThread(thread_func2, nullptr);
    CPLSleep(0.3);

    printf("re read block\n");
    CPL_IGNORE_RET_VAL(GDALRasterIO(GDALGetRasterBand(hDS, 1), GF_Read, 0, 0,
                                    20, 20, buf, 20, 20, GDT_Byte, 0, 0));
    printf("end of re read block\n");
    printf("buf[0]=%d\n", (int)buf[0]);
    CPLJoinThread(hThread);

    hThread = CPLCreateJoinableThread(thread_func3, nullptr);

    printf("re read block\n");
    CPLSetThreadLocalConfigOption("GDAL_RB_TRYGET_SLEEP_AFTER_TAKE_LOCK",
                                  "0.6");
    CPL_IGNORE_RET_VAL(GDALRasterIO(GDALGetRasterBand(hDS, 1), GF_Read, 0, 0,
                                    20, 20, buf, 20, 20, GDT_Byte, 0, 0));
    CPLSetThreadLocalConfigOption("GDAL_RB_TRYGET_SLEEP_AFTER_TAKE_LOCK", "0");
    printf("end of re read block\n");
    printf("buf[0]=%d\n", (int)buf[0]);
    CPLJoinThread(hThread);

    hThread = CPLCreateJoinableThread(thread_func2, nullptr);
    CPLSleep(0.3);
    printf("before GDALFlushRasterCache\n");
    GDALFlushRasterCache(GDALGetRasterBand(hDS, 1));
    printf("after GDALFlushRasterCache\n");