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Дата изменения: Sun Apr 18 13:37:01 1999
Дата индексирования: Mon Oct 1 21:03:36 2012
Кодировка:

SYSTEM CALL: shmdt()

  SYSTEM CALL: shmdt();                                                          

  PROTOTYPE: int shmdt ( char *shmaddr );
    RETURNS: -1 on error: errno = EINVAL (Invalid attach address passed)

After a shared memory segment is no longer needed by a process, it should be detached by calling this system call. As mentioned earlier, this is not the same as removing the segment from the kernel! After a detach is successful, the shm_nattch member of the associates shmid_ds structure is decremented by one. When this value reaches zero (0), the kernel will physically remove the segment.