#include <db.h> int DB_ENV->mutex_get_increment(DB_ENV *dbenv, u_int32_t *incrementp);
The DB_ENV->mutex_get_increment()
method returns the number of
additional mutexes to allocate.
The DB_ENV->mutex_get_increment()
method may be called at any time
during the life of the application.
The DB_ENV->mutex_get_increment()
method returns a non-zero error value on failure and 0 on success.