#include <db_cxx.h>

int
DbEnv::get_shm_key(long *shm_keyp);

The DbEnv::get_shm_key() method returns the base segment ID. This is used for Berkeley DB environment shared memory regions created in system memory on VxWorks or systems supporting X/Open-style shared memory interfaces. It may be specified using the DbEnv::set_shm_key() method.

The DbEnv::get_shm_key() method may be called at any time during the life of the application.

The DbEnv::get_shm_key() 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.