MBX -- Mailbox Manager (IPC) support information -- 84/03/23


  The  MBX  (mailbox)  manager  calls  implement  a  user-callable  interprocess
  communication (IPC) facility. This facility is based on a server/client  model
  of interprocess communication.

  The  server creates a named MBX file and in so doing declares his intention to
  handle incoming service requests.  Through this file, the server  may  control
  up  to  255  full-duplex conversations concurrently.  Prospective clients of a
  particular service supply the MBX package with the name of the MBX  file  that
  the  target  server  has created.  If the server agrees to provide service, it
  accepts the conversation and a full-duplex communications  channel  is  opened
  between them.

  Before  INTER-NODE  interprocess communication may be used, each participating
  node must initiate the MBX_HELPER program, either in a normal process  running
  the  Shell  or via the Display Manager command CPO (CREATE_PROCESS_ONLY).  The
  MBX program is found in:

       /SYS/MBX/MBX_HELPER


RELATED TOPICS

  More information is available.  Type:

  - HELP MBX_HELPER
    for details about the MBX_HELPER program.

  - HELP SYSCALLS MBX
    for information about the progam call interface to the MBX manager.