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| Comment: | Add commentary to clarify what is happening when an I/O error occurs while writing dirty pages to the database file. (CVS 4811) |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
afe49d81f479715e13f18a97170d414a |
| User & Date: | drh 2008-02-26 16:16:45 |
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2008-02-26
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| 18:40 | Fix a math error when computing how much memory to allocate for a new pager. (CVS 4812) (check-in: 690d05ce user: drh tags: trunk) | |
| 16:16 | Add commentary to clarify what is happening when an I/O error occurs while writing dirty pages to the database file. (CVS 4811) (check-in: afe49d81 user: drh tags: trunk) | |
| 14:46 | Add an assert() to verify that the dirty-page list in the pager is valid before using it. (CVS 4810) (check-in: 942daf94 user: drh tags: trunk) | |
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 1.410 2008/02/26 14:46:05 drh Exp $ */ #ifndef SQLITE_OMIT_DISKIO #include "sqliteInt.h" #include <assert.h> #include <string.h> /* ................................................................................ } #endif /* Write all dirty pages to the database file */ pPg = pager_get_all_dirty_pages(pPager); rc = pager_write_pagelist(pPg); if( rc!=SQLITE_OK ){ while( pPg && !pPg->dirty ){ pPg = pPg->pDirty; } pPager->pDirty = pPg; goto sync_exit; } pPager->pDirty = 0; /* Sync the database file. */ if( !pPager->noSync ){ rc = sqlite3OsSync(pPager->fd, pPager->sync_flags); |
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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 1.411 2008/02/26 16:16:45 drh Exp $ */ #ifndef SQLITE_OMIT_DISKIO #include "sqliteInt.h" #include <assert.h> #include <string.h> /* ................................................................................ } #endif /* Write all dirty pages to the database file */ pPg = pager_get_all_dirty_pages(pPager); rc = pager_write_pagelist(pPg); if( rc!=SQLITE_OK ){ assert( rc!=SQLITE_IOERR_BLOCKED ); /* The error might have left the dirty list all fouled up here, ** but that does not matter because if the if the dirty list did ** get corrupted, then the transaction will roll back and ** discard the dirty list. There is an assert in ** pager_get_all_dirty_pages() that verifies that no attempt ** is made to use an invalid dirty list. */ goto sync_exit; } pPager->pDirty = 0; /* Sync the database file. */ if( !pPager->noSync ){ rc = sqlite3OsSync(pPager->fd, pPager->sync_flags); |