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::AdoptBlock( GDALRasterBlock * poBlock )
{
int nBlockIndex;
int nXBlockOff = poBlock->GetXOff();
int nYBlockOff = poBlock->GetYOff();
FreeDanglingBlocks();
/* -------------------------------------------------------------------- */
/* Simple case without subblocking. */
/* -------------------------------------------------------------------- */
if( !bSubBlockingActive )
{
nBlockIndex = nXBlockOff + nYBlockOff * poBand->nBlocksPerRow;
CPLAssert( u.papoBlocks[nBlockIndex] == NULL );
u.papoBlocks[nBlockIndex] = poBlock;
}
else
{
/* -------------------------------------------------------------------- */
/* Identify the subblock in which our target occurs, and create */
/* it if necessary. */
/* -------------------------------------------------------------------- */
int nSubBlock = TO_SUBBLOCK(nXBlockOff)
+ TO_SUBBLOCK(nYBlockOff) * nSubBlocksPerRow;
if( u.papapoBlocks[nSubBlock] == NULL )
{
const int nSubGridSize =
sizeof(GDALRasterBlock*) * SUBBLOCK_SIZE * SUBBLOCK_SIZE;
u.papapoBlocks[nSubBlock] = (GDALRasterBlock **) VSICalloc(1, nSubGridSize);
if( u.papapoBlocks[nSubBlock] == NULL )
{
poBand->ReportError( CE_Failure, CPLE_OutOfMemory,
"Out of memory in AdoptBlock()." );
return CE_Failure;
}
}
/* -------------------------------------------------------------------- */
/* Check within subblock. */
/* -------------------------------------------------------------------- */
GDALRasterBlock **papoSubBlockGrid = u.papapoBlocks[nSubBlock];
int nBlockInSubBlock = WITHIN_SUBBLOCK(nXBlockOff)
+ WITHIN_SUBBLOCK(nYBlockOff) * SUBBLOCK_SIZE;
CPLAssert( papoSubBlockGrid[nBlockInSubBlock] == NULL );
papoSubBlockGrid[nBlockInSubBlock] = poBlock;
}
return CE_None;
}
CPLErr GDALHashSetBandBlockCache::AdoptBlock( GDALRasterBlock * poBlock )
{
FreeDanglingBlocks();
CPLLockHolderOptionalLockD( hLock );
m_oSet.insert(poBlock);
return CE_None;
}
GDALAbstractBandBlockCache::~GDALAbstractBandBlockCache()
{
CPLAssert(nKeepAliveCounter == 0);
FreeDanglingBlocks();
if( hSpinLock )
CPLDestroyLock(hSpinLock);
if( hCondMutex )
CPLDestroyMutex(hCondMutex);
if( hCond )
CPLDestroyCond(hCond);
}
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 );
}
