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Overview
| Comment: | Return an SQLITE_NOMEM error if the locking mutex fails to allocate. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | separate-lock-mutex |
| Files: | files | file ages | folders |
| SHA3-256: |
1c94834879be0601ac40ef3c4fb1b140 |
| User & Date: | drh 2018-07-23 22:55:10 |
Context
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2018-07-26
| ||
| 21:48 | In the unix VFS, give every unixInodeInfo object its own mutex, rather than using the global VFS mutex, to improve concurrency in cases where there are many threads operating on separate database files. check-in: 22f47cf4 user: drh tags: trunk | |
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2018-07-23
| ||
| 22:55 | Return an SQLITE_NOMEM error if the locking mutex fails to allocate. Closed-Leaf check-in: 1c948348 user: drh tags: separate-lock-mutex | |
| 21:10 | First attempt at reducing mutex contention in the unix VFS by providing a separate mutex for each unixInodeInfo object. check-in: f69afaf0 user: drh tags: separate-lock-mutex | |
Changes
Changes to src/os_unix.c.
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if( pInode==0 ){
pInode = sqlite3_malloc64( sizeof(*pInode) );
if( pInode==0 ){
return SQLITE_NOMEM_BKPT;
}
memset(pInode, 0, sizeof(*pInode));
memcpy(&pInode->fileId, &fileId, sizeof(fileId));
pInode->pLockMutex = sqlite3_mutex_alloc(SQLITE_MUTEX_FAST);
pInode->nRef = 1;
pInode->pNext = inodeList;
pInode->pPrev = 0;
if( inodeList ) inodeList->pPrev = pInode;
inodeList = pInode;
}else{
pInode->nRef++;
|
> | > > > > > |
1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 |
if( pInode==0 ){
pInode = sqlite3_malloc64( sizeof(*pInode) );
if( pInode==0 ){
return SQLITE_NOMEM_BKPT;
}
memset(pInode, 0, sizeof(*pInode));
memcpy(&pInode->fileId, &fileId, sizeof(fileId));
if( sqlite3GlobalConfig.bCoreMutex ){
pInode->pLockMutex = sqlite3_mutex_alloc(SQLITE_MUTEX_FAST);
if( pInode->pLockMutex==0 ){
sqlite3_free(pInode);
return SQLITE_NOMEM_BKPT;
}
}
pInode->nRef = 1;
pInode->pNext = inodeList;
pInode->pPrev = 0;
if( inodeList ) inodeList->pPrev = pInode;
inodeList = pInode;
}else{
pInode->nRef++;
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