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ole32: Storage optimization. 

We do not need to unmap and remap all the victim pages with every
resize as they are simply a cache. Provides significant speedup for
saving large storage files.
This commit is contained in:
Aric Stewart 2007-04-04 13:15:28 -05:00 committed by Alexandre Julliard
parent 86cbbaf930
commit 6230222aab
1 changed files with 9 additions and 0 deletions
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9
dlls/ole32/stg_bigblockfile.c
View File

@ -114,6 +114,7 @@ static MappedPage* BIGBLOCKFILE_CreatePage(LPBIGBLOCKFILE This,
static DWORD BIGBLOCKFILE_GetProtectMode(DWORD openFlags);
static BOOL BIGBLOCKFILE_FileInit(LPBIGBLOCKFILE This, HANDLE hFile);
static BOOL BIGBLOCKFILE_MemInit(LPBIGBLOCKFILE This, ILockBytes* plkbyt);
static void BIGBLOCKFILE_DeleteList(LPBIGBLOCKFILE This, MappedPage *list);
/* Note that this evaluates a and b multiple times, so don't
* pass expressions with side effects. */
@ -356,7 +357,15 @@ void BIGBLOCKFILE_SetSize(LPBIGBLOCKFILE This, ULARGE_INTEGER newSize)
TRACE("from %u to %u\n", This->filesize.u.LowPart, newSize.u.LowPart);
/*
* unmap all views, must be done before call to SetEndFile
*
* Just ditch the victim list because there is no guarentee we will need them
* and it is not worth the performance hit to unmap and remap them all.
*/
BIGBLOCKFILE_DeleteList(This, This->victimhead);
This->victimhead = NULL;
This->victimtail = NULL;
This->num_victim_pages = 0;
BIGBLOCKFILE_UnmapAllMappedPages(This);
if (This->fileBased)