Berkeley DB

DbEnv::set_shm_key

						#include <db_cxx.h>
						int
						DbEnv::set_shm_key(long shm_key);
					

Description

Specify a base segment ID for Berkeley DB environment shared memory regions created in system memory onVxWorks or systems supporting X/Open-style shared memory interfaces; for example, UNIX systems supporting shmget(2) and related SystemV IPC interfaces.

This base segment ID will be used when Berkeley DB shared memory regions are first created. It will be incremented a small integer value each time a new shared memory region is created; that is, if the base ID is 35, the first shared memory region created will have a segment ID of 35, and the next one will have a segment ID between 36 and 40 or so. A Berkeley DB environment always creates a master shared ...