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Smarter way of searching for a free block.

This commit is contained in:
Thuy Nguyen 1999-03-09 17:40:00 +00:00 committed by Alexandre Julliard
parent c08b9c5b90
commit 0445eb8b7e
2 changed files with 22 additions and 6 deletions
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27
ole/storage32.c
View File

@ -1921,6 +1921,11 @@ HRESULT StorageImpl_Construct(
* There is no block depot cached yet.
*/
This->indexBlockDepotCached = 0xFFFFFFFF;
/*
* Start searching for free blocks with block 0.
*/
This->prevFreeBlock = 0;
/*
* Create the block chain abstractions.
@ -2026,7 +2031,10 @@ ULONG StorageImpl_GetNextFreeBigBlock(
ULONG blocksPerDepot = This->bigBlockSize / sizeof(ULONG);
ULONG nextBlockIndex = BLOCK_SPECIAL;
int depotIndex = 0;
ULONG blockNoInSequence = 0;
ULONG freeBlock = BLOCK_UNUSED;
depotIndex = This->prevFreeBlock / blocksPerDepot;
depotBlockOffset = (This->prevFreeBlock % blocksPerDepot) * sizeof(ULONG);
/*
* Scan the entire big block depot until we find a block marked free
@ -2115,15 +2123,16 @@ ULONG StorageImpl_GetNextFreeBigBlock(
if (depotBuffer != 0)
{
depotBlockOffset = 0;
while ( ( (depotBlockOffset/sizeof(ULONG) ) < blocksPerDepot) &&
( nextBlockIndex != BLOCK_UNUSED))
{
StorageUtl_ReadDWord(depotBuffer, depotBlockOffset, &nextBlockIndex);
if (nextBlockIndex != BLOCK_UNUSED)
blockNoInSequence++;
if (nextBlockIndex == BLOCK_UNUSED)
{
freeBlock = (depotIndex * blocksPerDepot) +
(depotBlockOffset/sizeof(ULONG));
}
depotBlockOffset += sizeof(ULONG);
}
@ -2132,9 +2141,12 @@ ULONG StorageImpl_GetNextFreeBigBlock(
}
depotIndex++;
depotBlockOffset = 0;
}
return blockNoInSequence;
This->prevFreeBlock = freeBlock;
return freeBlock;
}
/******************************************************************************
@ -2309,6 +2321,9 @@ void StorageImpl_FreeBigBlock(
ULONG blockIndex)
{
StorageImpl_SetNextBlockInChain(This, blockIndex, BLOCK_UNUSED);
if (blockIndex < This->prevFreeBlock)
This->prevFreeBlock = blockIndex;
}
/************************************************************************

1
ole/storage32.h
View File

@ -298,6 +298,7 @@ struct StorageImpl
ULONG blockDepotCached[NUM_BLOCKS_PER_DEPOT_BLOCK];
ULONG indexBlockDepotCached;
ULONG prevFreeBlock;
/*
* Abstraction of the big block chains for the chains of the header.