CPLErr GDALHashSetBandBlockCache::FlushBlock( int nXBlockOff, int nYBlockOff,
int bWriteDirtyBlock )
{
GDALRasterBlock oBlockForLookup(nXBlockOff, nYBlockOff);
GDALRasterBlock* poBlock = nullptr;
{
CPLLockHolderOptionalLockD( hLock );
auto oIter = m_oSet.find(&oBlockForLookup);
if( oIter == m_oSet.end() )
return CE_None;
poBlock = *oIter;
m_oSet.erase(oIter);
}
if( !poBlock->DropLockForRemovalFromStorage() )
return CE_None;
CPLErr eErr = CE_None;
if( bWriteDirtyBlock && poBlock->GetDirty() )
eErr = poBlock->Write();
delete poBlock;
return eErr;
}
CPLErr GDALArrayBandBlockCache::FlushBlock( int nXBlockOff, int nYBlockOff,
int bWriteDirtyBlock )
{
int nBlockIndex;
GDALRasterBlock *poBlock = NULL;
/* -------------------------------------------------------------------- */
/* Simple case for single level caches. */
/* -------------------------------------------------------------------- */
if( !bSubBlockingActive )
{
nBlockIndex = nXBlockOff + nYBlockOff * poBand->nBlocksPerRow;
poBlock = u.papoBlocks[nBlockIndex];
u.papoBlocks[nBlockIndex] = NULL;
}
/* -------------------------------------------------------------------- */
/* Identify our subblock. */
/* -------------------------------------------------------------------- */
else
{
int nSubBlock = TO_SUBBLOCK(nXBlockOff)
+ TO_SUBBLOCK(nYBlockOff) * nSubBlocksPerRow;
/* -------------------------------------------------------------------- */
/* Check within subblock. */
/* -------------------------------------------------------------------- */
GDALRasterBlock **papoSubBlockGrid = u.papapoBlocks[nSubBlock];
if( papoSubBlockGrid == NULL )
return CE_None;
int nBlockInSubBlock = WITHIN_SUBBLOCK(nXBlockOff)
+ WITHIN_SUBBLOCK(nYBlockOff) * SUBBLOCK_SIZE;
poBlock = papoSubBlockGrid[nBlockInSubBlock];
papoSubBlockGrid[nBlockInSubBlock] = NULL;
}
if( poBlock == NULL )
return CE_None;
if( !poBlock->DropLockForRemovalFromStorage() )
return CE_None;
/* -------------------------------------------------------------------- */
/* Is the target block dirty? If so we need to write it. */
/* -------------------------------------------------------------------- */
CPLErr eErr = CE_None;
poBlock->Detach();
if( bWriteDirtyBlock && poBlock->GetDirty() )
eErr = poBlock->Write();
/* -------------------------------------------------------------------- */
/* Deallocate the block; */
/* -------------------------------------------------------------------- */
delete poBlock;
return eErr;
}