diff options
Diffstat (limited to 'src/os_unix.c')
| -rw-r--r-- | src/os_unix.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/src/os_unix.c b/src/os_unix.c index 483978673..f37afa1f1 100644 --- a/src/os_unix.c +++ b/src/os_unix.c @@ -5140,7 +5140,10 @@ static int unixShmGet( unixShmFile *pFile = p->pFile; int rc = SQLITE_OK; - sqlite3_mutex_enter(pFile->mutexBuf); + if( p->lockState!=SQLITE_SHM_CHECKPOINT ){ + sqlite3_mutex_enter(pFile->mutexBuf); + p->hasMutexBuf = 1; + } sqlite3_mutex_enter(pFile->mutex); if( pFile->szMap==0 || reqMapSize>pFile->szMap ){ int actualSize; @@ -5168,8 +5171,11 @@ static int unixShmGet( */ static int unixShmRelease(sqlite3_shm *pSharedMem){ unixShm *p = (unixShm*)pSharedMem; - unixShmFile *pFile = p->pFile; - sqlite3_mutex_leave(pFile->mutexBuf); + if( p->hasMutexBuf ){ + unixShmFile *pFile = p->pFile; + sqlite3_mutex_leave(pFile->mutexBuf); + p->hasMutexBuf = 0; + } return SQLITE_OK; } |