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Overview
| Comment: | Add a comment to xUnfetch on windows to say that the call to winUnmapfile() might be unnecessary. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | experimental-mmap |
| Files: | files | file ages | folders |
| SHA1: |
e3c63c31a21b27806592d066a013a111 |
| User & Date: | drh 2013-04-01 18:25:48 |
Context
|
2013-04-01
| ||
| 22:38 | Add the SQLITE_CONFIG_MMAP_LIMIT configuration option for overriding the SQLITE_DEFAULT_MMAP_LIMIT compile-time setting. Enhance "PRAGMA mmap_limit" so that without a specific database name, it sets the limit on all database files and changes the default for any future databases that might be added using ATTACH. check-in: 78141d0a user: drh tags: experimental-mmap | |
| 18:25 | Add a comment to xUnfetch on windows to say that the call to winUnmapfile() might be unnecessary. check-in: e3c63c31 user: drh tags: experimental-mmap | |
| 18:15 | In windows, round down the size of the memory mapped region to the next smaller multiple of the page size. check-in: 0e44ed1b user: drh tags: experimental-mmap | |
Changes
Changes to src/os_win.c.
3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 |
/* If p!=0, it must match the iOff value. */
assert( p==0 || p==&((u8 *)pFd->pMapRegion)[iOff] );
if( p ){
pFd->nFetchOut--;
}else{
winUnmapfile(pFd);
}
assert( pFd->nFetchOut>=0 );
return SQLITE_OK;
}
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> > > > |
3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 |
/* If p!=0, it must match the iOff value. */
assert( p==0 || p==&((u8 *)pFd->pMapRegion)[iOff] );
if( p ){
pFd->nFetchOut--;
}else{
/* FIXME: If Windows truly always prevents truncating or deleting a
** file while a mapping is held, then the following winUnmapfile() call
** is unnecessary can can be omitted - potentially improving
** performance. */
winUnmapfile(pFd);
}
assert( pFd->nFetchOut>=0 );
return SQLITE_OK;
}
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