diff options
Diffstat (limited to 'chromium/third_party/sqlite/src/ext/rbu/sqlite3rbu.c')
| -rw-r--r-- | chromium/third_party/sqlite/src/ext/rbu/sqlite3rbu.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/chromium/third_party/sqlite/src/ext/rbu/sqlite3rbu.c b/chromium/third_party/sqlite/src/ext/rbu/sqlite3rbu.c index 12a0a466033..c5f809848d1 100644 --- a/chromium/third_party/sqlite/src/ext/rbu/sqlite3rbu.c +++ b/chromium/third_party/sqlite/src/ext/rbu/sqlite3rbu.c @@ -4828,22 +4828,24 @@ static int rbuVfsShmLock(sqlite3_file *pFile, int ofst, int n, int flags){ #endif assert( p->openFlags & (SQLITE_OPEN_MAIN_DB|SQLITE_OPEN_TEMP_DB) ); - if( pRbu && (pRbu->eStage==RBU_STAGE_OAL || pRbu->eStage==RBU_STAGE_MOVE) ){ - /* Magic number 1 is the WAL_CKPT_LOCK lock. Preventing SQLite from - ** taking this lock also prevents any checkpoints from occurring. - ** todo: really, it's not clear why this might occur, as - ** wal_autocheckpoint ought to be turned off. */ + if( pRbu && ( + pRbu->eStage==RBU_STAGE_OAL + || pRbu->eStage==RBU_STAGE_MOVE + || pRbu->eStage==RBU_STAGE_DONE + )){ + /* Prevent SQLite from taking a shm-lock on the target file when it + ** is supplying heap memory to the upper layer in place of *-shm + ** segments. */ if( ofst==WAL_LOCK_CKPT && n==1 ) rc = SQLITE_BUSY; }else{ int bCapture = 0; if( pRbu && pRbu->eStage==RBU_STAGE_CAPTURE ){ bCapture = 1; } - if( bCapture==0 || 0==(flags & SQLITE_SHM_UNLOCK) ){ rc = p->pReal->pMethods->xShmLock(p->pReal, ofst, n, flags); if( bCapture && rc==SQLITE_OK ){ - pRbu->mLock |= (1 << ofst); + pRbu->mLock |= ((1<<n) - 1) << ofst; } } } |