int VSICurlStreamingHandle::ReceivedBytes(GByte *buffer, size_t count, size_t nmemb)
{
size_t nSize = count * nmemb;
nBodySize += nSize;
if (ENABLE_DEBUG)
CPLDebug("VSICURL", "Receiving %d bytes...", (int)nSize);
if( bHasCandidateFileSize && bCanTrustCandidateFileSize && !bHastComputedFileSize )
{
poFS->AcquireMutex();
CachedFileProp* cachedFileProp = poFS->GetCachedFileProp(pszURL);
cachedFileProp->fileSize = fileSize = nCandidateFileSize;
cachedFileProp->bHastComputedFileSize = bHastComputedFileSize = TRUE;
if (ENABLE_DEBUG)
CPLDebug("VSICURL", "File size = " CPL_FRMT_GUIB, fileSize);
poFS->ReleaseMutex();
}
AcquireMutex();
if (eExists == EXIST_UNKNOWN)
{
poFS->AcquireMutex();
CachedFileProp* cachedFileProp = poFS->GetCachedFileProp(pszURL);
cachedFileProp->eExists = eExists = EXIST_YES;
poFS->ReleaseMutex();
}
else if (eExists == EXIST_NO)
{
ReleaseMutex();
return 0;
}
while(TRUE)
{
size_t nFree = oRingBuffer.GetCapacity() - oRingBuffer.GetSize();
if (nSize <= nFree)
{
oRingBuffer.Write(buffer, nSize);
/* Signal to the consumer that we have added bytes to the buffer */
CPLCondSignal(hCondProducer);
if (bAskDownloadEnd)
{
if (ENABLE_DEBUG)
CPLDebug("VSICURL", "Download interruption asked");
ReleaseMutex();
return 0;
}
break;
}
else
{
oRingBuffer.Write(buffer, nFree);
buffer += nFree;
nSize -= nFree;
/* Signal to the consumer that we have added bytes to the buffer */
CPLCondSignal(hCondProducer);
if (ENABLE_DEBUG)
CPLDebug("VSICURL", "Waiting for reader to consume some bytes...");
while(oRingBuffer.GetSize() == oRingBuffer.GetCapacity() && !bAskDownloadEnd)
{
CPLCondWait(hCondConsumer, hRingBufferMutex);
}
if (bAskDownloadEnd)
{
if (ENABLE_DEBUG)
CPLDebug("VSICURL", "Download interruption asked");
ReleaseMutex();
return 0;
}
}
}
ReleaseMutex();
return nmemb;
}
