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Overview
| Comment: | Improve a comment in wal.c. No code changes. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | experimental-mmap |
| Files: | files | file ages | folders |
| SHA1: |
60b9f5e4dd2af54975ba78437239f0be |
| User & Date: | dan 2013-03-23 17:29:06 |
Context
|
2013-03-23
| ||
| 21:00 | Replace the sqlite3_io_methods.xMremap interface with sqlite3_io_methods.xFetch and xUnfetch. check-in: 1431be95 user: dan tags: experimental-mmap | |
| 17:29 | Improve a comment in wal.c. No code changes. check-in: 60b9f5e4 user: dan tags: experimental-mmap | |
| 14:20 | Fix a case where a checkpoint operation could write to an invalid part of a memory mapped region. check-in: 8dbe89d0 user: dan tags: experimental-mmap | |
Changes
Changes to src/wal.c.
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u32 nBackfill = pInfo->nBackfill;
/* Sync the WAL to disk */
if( sync_flags ){
rc = sqlite3OsSync(pWal->pWalFd, sync_flags);
}
/* If the database file may grow as a result of this checkpoint, hint
** about the eventual size of the db file to the VFS layer.
*/
if( rc==SQLITE_OK ){
i64 nReq = ((i64)mxPage * szPage);
rc = sqlite3PagerSetFilesize(pWal->pPager, nReq);
}
/* Iterate through the contents of the WAL, copying data to the db file. */
while( rc==SQLITE_OK && 0==walIteratorNext(pIter, &iDbpage, &iFrame) ){
i64 iOffset;
assert( walFramePgno(pWal, iFrame)==iDbpage );
if( iFrame<=nBackfill || iFrame>mxSafeFrame || iDbpage>mxPage ) continue;
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| | > | > > > > | |
1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 |
u32 nBackfill = pInfo->nBackfill;
/* Sync the WAL to disk */
if( sync_flags ){
rc = sqlite3OsSync(pWal->pWalFd, sync_flags);
}
/* If the database file is currently smaller than mxPage pages in size,
** the call below issues an SQLITE_FCNTL_SIZE_HINT to the OS layer to
** inform it that it is likely to grow to that size.
**
** Additionally, if the pager is using mmap(), then the call to
** SetFilesize() guarantees that the mapping is not larger than mxPage
** pages. This makes the sqlite3OsTruncate() call below safe - no pages
** that are part of the mapped region will be truncated away. */
if( rc==SQLITE_OK ){
i64 nReq = ((i64)mxPage * szPage);
rc = sqlite3PagerSetFilesize(pWal->pPager, nReq);
}
/* Iterate through the contents of the WAL, copying data to the db file. */
while( rc==SQLITE_OK && 0==walIteratorNext(pIter, &iDbpage, &iFrame) ){
i64 iOffset;
assert( walFramePgno(pWal, iFrame)==iDbpage );
if( iFrame<=nBackfill || iFrame>mxSafeFrame || iDbpage>mxPage ) continue;
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