diff options
Diffstat (limited to 'db2/lock/lock_conflict.c')
| -rw-r--r-- | db2/lock/lock_conflict.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/db2/lock/lock_conflict.c b/db2/lock/lock_conflict.c new file mode 100644 index 0000000000..ff0287f07e --- /dev/null +++ b/db2/lock/lock_conflict.c @@ -0,0 +1,39 @@ +/*- + * See the file LICENSE for redistribution information. + * + * Copyright (c) 1996, 1997 + * Sleepycat Software. All rights reserved. + */ + +#include "config.h" + +#ifndef lint +static const char sccsid[] = "@(#)lock_conflict.c 10.2 (Sleepycat) 6/21/97"; +#endif /* not lint */ + +#ifndef NO_SYSTEM_INCLUDES +#include <sys/types.h> +#endif + +#include "db_int.h" + +/* + * The conflict arrays are set up such that the row is the lock you + * are holding and the column is the lock that is desired. + */ +const u_int8_t db_rw_conflicts[] = { + /* N R W */ + /* N */ 0, 0, 0, + /* R */ 0, 0, 1, + /* W */ 0, 1, 1 +}; + +const u_int8_t db_riw_conflicts[] = { + /* N S X IS IX SIX */ + /* N */ 0, 0, 0, 0, 0, 0, + /* S */ 0, 0, 1, 0, 1, 1, + /* X */ 1, 1, 1, 1, 1, 1, + /* IS */ 0, 0, 1, 0, 0, 0, + /* IX */ 0, 1, 1, 0, 0, 0, + /* SIX */ 0, 1, 1, 0, 0, 0 +}; |