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Overview
| Comment: | Another fix to the OsUnlock I/O error logic. (CVS 4839) |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
22bd537ee2af6779ecb38502513ae533 |
| User & Date: | drh 2008-03-07 20:14:39 |
Context
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2008-03-07
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| 21:04 | Fix an alignment problem in test_async.c. (CVS 4840) check-in: 752d8e21 user: drh tags: trunk | |
| 20:14 | Another fix to the OsUnlock I/O error logic. (CVS 4839) check-in: 22bd537e user: drh tags: trunk | |
| 19:51 | Correctly handle I/O errors that occur during OsUnlock(). Before this fix, an I/O error during OsUnlock() could lead to database corruption. That is not a serious problem, though, since errors during OsUnlock() are not possible on most systems. (CVS 4838) check-in: b4c1258e user: drh tags: trunk | |
Changes
Changes to src/os_unix.c.
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/*
** The afpLockingContext structure contains all afp lock specific state
*/
typedef struct afpLockingContext afpLockingContext;
struct afpLockingContext {
unsigned long long sharedLockByte;
char *filePath;
};
struct ByteRangeLockPB2
{
unsigned long long offset; /* offset to first byte to lock */
unsigned long long length; /* nbr of bytes to lock */
unsigned long long retRangeStart; /* nbr of 1st byte locked if successful */
|
| |
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/*
** The afpLockingContext structure contains all afp lock specific state
*/
typedef struct afpLockingContext afpLockingContext;
struct afpLockingContext {
unsigned long long sharedLockByte;
const char *filePath;
};
struct ByteRangeLockPB2
{
unsigned long long offset; /* offset to first byte to lock */
unsigned long long length; /* nbr of bytes to lock */
unsigned long long retRangeStart; /* nbr of 1st byte locked if successful */
|
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 1.413 2008/03/07 19:51:14 drh Exp $ */ #ifndef SQLITE_OMIT_DISKIO #include "sqliteInt.h" #include <assert.h> #include <string.h> /* ................................................................................ ** on the pager file (by this or any other process), it will be ** treated as a hot-journal and rolled back. */ static void pager_unlock(Pager *pPager){ if( !pPager->exclusiveMode ){ if( !MEMDB ){ int rc = osUnlock(pPager->fd, NO_LOCK); if( rc ) pager_error(pPager, rc); pPager->dbSize = -1; IOTRACE(("UNLOCK %p\n", pPager)) /* If Pager.errCode is set, the contents of the pager cache cannot be ** trusted. Now that the pager file is unlocked, the contents of the ** cache can be discarded and the error code safely cleared. */ |
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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 1.414 2008/03/07 20:14:39 drh Exp $ */ #ifndef SQLITE_OMIT_DISKIO #include "sqliteInt.h" #include <assert.h> #include <string.h> /* ................................................................................ ** on the pager file (by this or any other process), it will be ** treated as a hot-journal and rolled back. */ static void pager_unlock(Pager *pPager){ if( !pPager->exclusiveMode ){ if( !MEMDB ){ int rc = osUnlock(pPager->fd, NO_LOCK); if( rc ) pPager->errCode = rc; pPager->dbSize = -1; IOTRACE(("UNLOCK %p\n", pPager)) /* If Pager.errCode is set, the contents of the pager cache cannot be ** trusted. Now that the pager file is unlocked, the contents of the ** cache can be discarded and the error code safely cleared. */ |