CPLErr GDALHashSetBandBlockCache::FlushCache()
{
FreeDanglingBlocks();
CPLErr eGlobalErr = poBand->eFlushBlockErr;
std::set<GDALRasterBlock*, BlockComparator> oOldSet;
{
CPLLockHolderOptionalLockD( hLock );
oOldSet = std::move(m_oSet);
}
for( auto& poBlock: oOldSet )
{
if( poBlock->DropLockForRemovalFromStorage() )
{
CPLErr eErr = CE_None;
if( eGlobalErr == CE_None && poBlock->GetDirty() )
eErr = poBlock->Write();
delete poBlock;
if( eErr != CE_None )
eGlobalErr = eErr;
}
}
WaitKeepAliveCounter();
return( eGlobalErr );
}
CPLErr GDALArrayBandBlockCache::FlushCache()
{
FreeDanglingBlocks();
CPLErr eGlobalErr = poBand->eFlushBlockErr;
/* -------------------------------------------------------------------- */
/* Flush all blocks in memory ... this case is without subblocking.*/
/* -------------------------------------------------------------------- */
if( !bSubBlockingActive )
{
for( int iY = 0; iY < poBand->nBlocksPerColumn; iY++ )
{
for( int iX = 0; iX < poBand->nBlocksPerRow; iX++ )
{
if( u.papoBlocks[iX + iY*poBand->nBlocksPerRow] != NULL )
{
CPLErr eErr;
eErr = FlushBlock( iX, iY, eGlobalErr == CE_None );
if( eErr != CE_None )
eGlobalErr = eErr;
}
}
}
}
/* -------------------------------------------------------------------- */
/* With subblocking. We can short circuit missing subblocks. */
/* -------------------------------------------------------------------- */
else
{
int iSBX, iSBY;
for( iSBY = 0; iSBY < nSubBlocksPerColumn; iSBY++ )
{
for( iSBX = 0; iSBX < nSubBlocksPerRow; iSBX++ )
{
int nSubBlock = iSBX + iSBY * nSubBlocksPerRow;
GDALRasterBlock **papoSubBlockGrid = u.papapoBlocks[nSubBlock];
if( papoSubBlockGrid == NULL )
continue;
for( int iY = 0; iY < SUBBLOCK_SIZE; iY++ )
{
for( int iX = 0; iX < SUBBLOCK_SIZE; iX++ )
{
if( papoSubBlockGrid[iX + iY * SUBBLOCK_SIZE] != NULL )
{
CPLErr eErr;
eErr = FlushBlock( iX + iSBX * SUBBLOCK_SIZE,
iY + iSBY * SUBBLOCK_SIZE,
eGlobalErr == CE_None );
if( eErr != CE_None )
eGlobalErr = eErr;
}
}
}
// We might as well get rid of this grid chunk since we know
// it is now empty.
u.papapoBlocks[nSubBlock] = NULL;
CPLFree( papoSubBlockGrid );
}
}
}
WaitKeepAliveCounter();
return( eGlobalErr );
}