Chapter 7. The DbLock Handle

Chapter 7. The DbLock Handle
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#include <db_cxx.h>

class DbLock { 
public: 
        DbLock(); 
        DbLock(const DbLock &); 
        DbLock &operator = (const DbLock &); 
        ~DbLock(); 
};

The locking interfaces for the Berkeley DB database environment are methods of the DbEnv handle. The DbLock object is the handle for a single lock, and has no methods of its own.

Locking Subsystem and Related Methods

Locking Subsystem and Related Methods	Description
DbDeadlockException	Exception class for deadlocks
DbLockNotGrantedException	Exception class for lock request failures
DbEnv::lock_detect()	Perform deadlock detection
DbEnv::lock_get()	Acquire a lock
DbEnv::lock_id()	Acquire a locker ID
DbEnv::lock_id_free()	Release a locker ID
DbEnv::lock_put()	Release a lock
DbEnv::lock_stat()	Return lock subsystem statistics
DbEnv::lock_stat_print()	Print lock subsystem statistics
DbEnv::lock_vec()	Acquire/release locks
DbEnv::cdsgroup_begin()	Get a locker ID in Berkeley DB Concurrent Data Store
Locking Subsystem Configuration
DbEnv::set_timeout(), DbEnv::get_timeout()	Set/get lock and transaction timeout
DbEnv::set_lk_conflicts(), DbEnv::get_lk_conflicts()	Set/get lock conflicts matrix
DbEnv::set_lk_detect(), DbEnv::get_lk_detect()	Set/get automatic deadlock detection
DbEnv::set_lk_max_lockers(), DbEnv::get_lk_max_lockers()	Set/get maximum number of lockers
DbEnv::set_lk_max_locks(), DbEnv::get_lk_max_locks()	Set/get maximum number of locks
DbEnv::set_lk_max_objects(), DbEnv::get_lk_max_objects()	Set/get maximum number of lock objects
DbEnv::set_lk_partitions(), DbEnv::get_lk_partitions()	Set/get number of lock partitions
DbEnv::set_lk_priority(), DbEnv::get_lk_priority()	Set/get a locker's deadlock priority
DbEnv::set_lk_tablesize(), DbEnv::get_lk_tablesize()	Set/get size of the lock object hash table