OSErr BlockDeallocate (
SVCB *vcb, // Which volume to deallocate space on
UInt32 firstBlock, // First block in range to deallocate
UInt32 numBlocks) // Number of contiguous blocks to deallocate
{
OSErr err;
//
// If no blocks to deallocate, then exit early
//
if (numBlocks == 0) {
err = noErr;
goto Exit;
}
//
// Call internal routine to free the sequence of blocks
//
err = BlockMarkFree(vcb, firstBlock, numBlocks);
if (err)
goto Exit;
//
// Update the volume's free block count, and mark the VCB as dirty.
//
vcb->vcbFreeBlocks += numBlocks;
MarkVCBDirty(vcb);
Exit:
return err;
}
__private_extern__
OSErr BlockDeallocate (
ExtendedVCB *vcb, // Which volume to deallocate space on
u_int32_t firstBlock, // First block in range to deallocate
u_int32_t numBlocks) // Number of contiguous blocks to deallocate
{
OSErr err;
//
// If no blocks to deallocate, then exit early
//
if (numBlocks == 0) {
err = noErr;
goto Exit;
}
//
// Call internal routine to free the sequence of blocks
//
err = BlockMarkFree(vcb, firstBlock, numBlocks);
if (err)
goto Exit;
//
// Update the volume's free block count, and mark the VCB as dirty.
//
HFS_MOUNT_LOCK(vcb, TRUE);
vcb->freeBlocks += numBlocks;
if (vcb->nextAllocation == (firstBlock + numBlocks))
HFS_UPDATE_NEXT_ALLOCATION(vcb, (vcb->nextAllocation - numBlocks));
MarkVCBDirty(vcb);
HFS_MOUNT_UNLOCK(vcb, TRUE);
hfs_generate_volume_notifications(VCBTOHFS(vcb));
Exit:
return err;
}