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Overview
| Comment: | Add an assert() to verify that the dirty-page list in the pager is valid before using it. (CVS 4810) |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
942daf94ef1f8ac678988e175ef968a2 |
| User & Date: | drh 2008-02-26 14:46:05 |
Context
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2008-02-26
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| 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 | |
| 06:05 | Have sqlite3PagerPagecount() return -1 when the pager is in error state. Fix for #2961. (CVS 4809) check-in: 427e7f8b 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 1.409 2008/02/26 06:05:31 danielk1977 Exp $ */ #ifndef SQLITE_OMIT_DISKIO #include "sqliteInt.h" #include <assert.h> #include <string.h> /* ................................................................................ /* ** Collect every dirty page into a dirty list and ** return a pointer to the head of that list. All pages are ** collected even if they are still in use. */ static PgHdr *pager_get_all_dirty_pages(Pager *pPager){ return pPager->pDirty; } /* ** Return TRUE if there is a hot journal on the given pager. ** A hot journal is one that needs to be played back. ** |
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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> /* ................................................................................ /* ** Collect every dirty page into a dirty list and ** return a pointer to the head of that list. All pages are ** collected even if they are still in use. */ static PgHdr *pager_get_all_dirty_pages(Pager *pPager){ #ifndef NDEBUG /* Verify the sanity of the dirty list when we are running ** in debugging mode. This is expensive, so do not ** do this on a normal build. */ int n1 = 0; int n2 = 0; PgHdr *p; for(p=pPager->pAll; p; p=p->pNextAll){ if( p->dirty ) n1++; } for(p=pPager->pDirty; p; p=p->pDirty){ n2++; } assert( n1==n2 ); #endif return pPager->pDirty; } /* ** Return TRUE if there is a hot journal on the given pager. ** A hot journal is one that needs to be played back. ** |