UNIX_SHM_DMS 28281 sqlite3/libsqlite/sqlite3.c if( unixShmSystemLock(pShmNode, F_WRLCK, UNIX_SHM_DMS, 1)==SQLITE_OK ){ UNIX_SHM_DMS 28287 sqlite3/libsqlite/sqlite3.c rc = unixShmSystemLock(pShmNode, F_RDLCK, UNIX_SHM_DMS, 1);