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DbEnv::set_lk_conflicts
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#include <db_cxx.h>
int
DbEnv::set_lk_conflicts(u_int8_t *conflicts, int nmodes);
Description
Set the locking conflicts matrix.
The conflicts argument
is an nmodes by nmodes array.
A non-0 value for the array element indicates that requested_mode and
held_mode conflict:
conflicts[requested_mode][held_mode]
The not-granted mode must be represented by 0.
If DbEnv::set_lk_conflicts is never called, a standard conflicts
array is used; see Standard Lock
Modes for more information.
The DbEnv::set_lk_conflicts interface may be used only to configure Berkeley DB before
the DbEnv::open interface is called.
The DbEnv::set_lk_conflicts method either returns a non-zero error value or throws an exception that
encapsulates a non-zero error value on failure, and returns 0 on success.
Errors
The DbEnv::set_lk_conflicts method may fail and throw an exception or return a non-zero error for the following conditions:
- EINVAL
- An invalid flag value or parameter was specified.
Called after DbEnv::open was called.
- ENOMEM
- No memory was available to copy the conflicts array.
The DbEnv::set_lk_conflicts method may fail and throw an exception or return a non-zero error for errors specified for other Berkeley DB and C library or system methods.
If a catastrophic error has occurred, the DbEnv::set_lk_conflicts method may fail and either
return DB_RUNRECOVERY or throw an exception encapsulating
DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail
in the same way.
Class
DbEnv, DbLock
See Also
DbEnv::set_lk_conflicts,
DbEnv::set_lk_detect,
DbEnv::set_lk_max_lockers,
DbEnv::set_lk_max_locks,
DbEnv::set_lk_max_objects,
DbEnv::lock_detect,
DbEnv::lock_get,
DbEnv::lock_id,
DbEnv::lock_id_free,
DbEnv::lock_put,
DbEnv::lock_stat,
and
DbEnv::lock_vec.
Copyright Sleepycat Software
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