void PatchFsMethods(void)
{
static uint8_t ucFsMethodsPatched = 0;
if(!ucFsMethodsPatched)
{
ucFsMethodsPatched = 1;
/* Patch branches to it. */
int len = sizeof(fs_methods) / sizeof(struct fs_magic_t);
while (len--) {
unsigned int real_addr = (unsigned int)fs_methods[len].real;
unsigned int repl_addr = (unsigned int)fs_methods[len].replacement;
unsigned int replace_instr = 0x48000002 | (repl_addr & 0x03fffffc);
if(*(volatile unsigned int *)(0xC1000000 + real_addr) != replace_instr) {
// in the real function, replace the "mflr r0" instruction by a jump to the replacement function
*(volatile unsigned int *)(0xC1000000 + real_addr) = replace_instr;
FlushBlock((0xC1000000 + real_addr));
}
}
}
}
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 );
}
