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Overview
| Comment: | Allow the rollback journal to be empty except for its header. Ticket #212. (CVS 809) |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
1ba41bc2afab18cc295d9a45845296b4 |
| User & Date: | drh 2003-01-03 02:04:27 |
Context
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2003-01-04
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| 16:48 | Optimizations to the BTree module for a modest speed improvement. (CVS 810) check-in: 39902a70 user: drh tags: trunk | |
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2003-01-03
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| 02:04 | Allow the rollback journal to be empty except for its header. Ticket #212. (CVS 809) check-in: 1ba41bc2 user: drh tags: trunk | |
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2003-01-02
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| 14:43 | Code optimizations to help the library run faster. (CVS 808) check-in: db745e87 user: drh tags: trunk | |
Changes
Changes to src/pager.c.
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** The pager is used to access a database disk file. It implements ** atomic commit and rollback through the use of a journal file that ** is separate from the database file. The pager also implements file ** locking to prevent two processes from writing the same database ** file simultaneously, or one process from reading the database while ** another is writing. ** ** @(#) $Id: pager.c,v 1.63 2003/01/02 14:43:57 drh Exp $ */ #include "os.h" /* Must be first to enable large file support */ #include "sqliteInt.h" #include "pager.h" #include <assert.h> #include <string.h> ................................................................................ */ assert( pPager->journalOpen ); sqliteOsSeek(&pPager->jfd, 0); rc = sqliteOsFileSize(&pPager->jfd, &nRec); if( rc!=SQLITE_OK ){ goto end_playback; } if( nRec <= sizeof(aMagic)+sizeof(Pgno) ){ goto end_playback; } nRec = (nRec - (sizeof(aMagic)+sizeof(Pgno))) / sizeof(PageRecord); /* Read the beginning of the journal and truncate the ** database file back to its original size. */ |
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** The pager is used to access a database disk file. It implements ** atomic commit and rollback through the use of a journal file that ** is separate from the database file. The pager also implements file ** locking to prevent two processes from writing the same database ** file simultaneously, or one process from reading the database while ** another is writing. ** ** @(#) $Id: pager.c,v 1.64 2003/01/03 02:04:27 drh Exp $ */ #include "os.h" /* Must be first to enable large file support */ #include "sqliteInt.h" #include "pager.h" #include <assert.h> #include <string.h> ................................................................................ */ assert( pPager->journalOpen ); sqliteOsSeek(&pPager->jfd, 0); rc = sqliteOsFileSize(&pPager->jfd, &nRec); if( rc!=SQLITE_OK ){ goto end_playback; } if( nRec < sizeof(aMagic)+sizeof(Pgno) ){ goto end_playback; } nRec = (nRec - (sizeof(aMagic)+sizeof(Pgno))) / sizeof(PageRecord); /* Read the beginning of the journal and truncate the ** database file back to its original size. */ |