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Overview
| Comment: | Always sync the journal file after zeroing out the header. (CVS 5036) |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | 5896ae3d68d29dc172c027c72aa2a98c |
| User & Date: | drh 2008-04-22 17:15:18 |
Context
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2008-04-23
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| 23:03 | We should better not pass open file handles to child processes, so add respective flag for DosOpen(). (CVS 5037) check-in: 1518e854 user: pweilbacher tags: trunk | |
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2008-04-22
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| 17:15 | Always sync the journal file after zeroing out the header. (CVS 5036) check-in: 5896ae3d user: drh tags: trunk | |
| 14:31 | Avoid non-contiguous writes when creating a journal header. (CVS 5035) check-in: dfacddbb user: danielk1977 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 1.432 2008/04/22 14:31:48 danielk1977 Exp $ */ #ifndef SQLITE_OMIT_DISKIO #include "sqliteInt.h" #include <assert.h> #include <string.h> /* ................................................................................ */ static int zeroJournalHdr(Pager *pPager){ int rc; static const char zeroHdr[28]; IOTRACE(("JZEROHDR %p\n", pPager)) rc = sqlite3OsWrite(pPager->jfd, zeroHdr, sizeof(zeroHdr), 0); return rc; } /* ** The journal file must be open when this routine is called. A journal ** header (JOURNAL_HDR_SZ bytes) is written into the journal file at the ** current location. |
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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 1.433 2008/04/22 17:15:18 drh Exp $ */ #ifndef SQLITE_OMIT_DISKIO #include "sqliteInt.h" #include <assert.h> #include <string.h> /* ................................................................................ */ static int zeroJournalHdr(Pager *pPager){ int rc; static const char zeroHdr[28]; IOTRACE(("JZEROHDR %p\n", pPager)) rc = sqlite3OsWrite(pPager->jfd, zeroHdr, sizeof(zeroHdr), 0); if( rc==SQLITE_OK ){ rc = sqlite3OsSync(pPager->jfd, SQLITE_SYNC_DATAONLY | pPager->sync_flags); } return rc; } /* ** The journal file must be open when this routine is called. A journal ** header (JOURNAL_HDR_SZ bytes) is written into the journal file at the ** current location. |