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Overview
| Comment: | Omit an unnecessary Sleep() call in windows pending-lock retry logic. Enhance the comment on that logic to discourage people from copying it into other VFSes. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
0c951a970436725b6bbd64568de500f7 |
| User & Date: | drh 2011-11-09 18:07:34 |
Context
|
2011-11-10
| ||
| 20:21 | In winAccess, save the Win32 last error value prior to invoking user logging callback. Also, explicitly pass the Win32 last error value to winLogError in order to keep it accurate. Fixes a problem reported on the mailing list. check-in: 32ab3657 user: mistachkin tags: trunk | |
|
2011-11-09
| ||
| 18:07 | Omit an unnecessary Sleep() call in windows pending-lock retry logic. Enhance the comment on that logic to discourage people from copying it into other VFSes. check-in: 0c951a97 user: drh tags: trunk | |
|
2011-11-07
| ||
| 18:16 | Make the unix VFS tolerant of read() calls that return less than the requested number of bytes. check-in: a210695a user: drh tags: trunk | |
Changes
Changes to src/os_win.c.
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newLocktype = pFile->locktype;
if( (pFile->locktype==NO_LOCK)
|| ( (locktype==EXCLUSIVE_LOCK)
&& (pFile->locktype==RESERVED_LOCK))
){
int cnt = 3;
while( cnt-->0 && (res = LockFile(pFile->h, PENDING_BYTE, 0, 1, 0))==0 ){
/* Try 3 times to get the pending lock. The pending lock might be
** held by another reader process who will release it momentarily.
*/
OSTRACE(("could not get a PENDING lock. cnt=%d\n", cnt));
Sleep(1);
}
gotPendingLock = res;
if( !res ){
error = GetLastError();
}
}
|
| | > > | |
1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 |
newLocktype = pFile->locktype;
if( (pFile->locktype==NO_LOCK)
|| ( (locktype==EXCLUSIVE_LOCK)
&& (pFile->locktype==RESERVED_LOCK))
){
int cnt = 3;
while( cnt-->0 && (res = LockFile(pFile->h, PENDING_BYTE, 0, 1, 0))==0 ){
/* Try 3 times to get the pending lock. This is needed to work
** around problems caused by anti-virus software on windows system.
** If you are using this code as a model for alternative VFSes, do not
** copy this retry logic. It is a hack intended for windows only.
*/
OSTRACE(("could not get a PENDING lock. cnt=%d\n", cnt));
if( cnt ) Sleep(1);
}
gotPendingLock = res;
if( !res ){
error = GetLastError();
}
}
|