Function CPL_STDCALL GDALGetCacheMax64

gcore/gdalrasterblock.cpp:215–258

 */

GIntBig CPL_STDCALL GDALGetCacheMax64()
{
    static std::once_flag flagSetupGDALGetCacheMax64;
    std::call_once(
        flagSetupGDALGetCacheMax64,
        []()
        {
            {
                INITIALIZE_LOCK;
            }
            bSleepsForBockCacheDebug =
                CPLTestBool(CPLGetConfigOption("GDAL_DEBUG_BLOCK_CACHE", "NO"));

            const char *pszCacheMax = CPLGetConfigOption("GDAL_CACHEMAX", "5%");
            GIntBig nNewCacheMax;
            bool bUnitSpecified = false;

            if (CPLParseMemorySize(pszCacheMax, &nNewCacheMax,
                                   &bUnitSpecified) != CE_None)
            {
                CPLError(CE_Failure, CPLE_NotSupported,
                         "Invalid value for GDAL_CACHEMAX. "
                         "Using default value.");
                if (CPLParseMemorySize("5%", &nNewCacheMax, &bUnitSpecified) !=
                    CE_None)
                {
                    // This means that usable physical RAM could not be determined.
                    nNewCacheMax = nCacheMax;
                }
            }

            if (!bUnitSpecified && nNewCacheMax < 100000)
            {
                // Assume MB
                nNewCacheMax *= (1024 * 1024);
            }

            nCacheMax = nNewCacheMax;
            CPLDebug("GDAL", "GDAL_CACHEMAX = " CPL_FRMT_GIB " MB",
                     nCacheMax / (1024 * 1024));
        });

    return nCacheMax;
}

/************************************************************************/
/*                          GDALGetCacheUsed()                          */