Serializing parallel tasks (WAIT and POST)

Use WAIT and POST to control the parallel execution of tasks as a means of serialization. The basic WAIT/POST services that are available to both authorized and unauthorized programs are explained in the z/OS MVS Programming: Assembler Services Guide. The additional forms of WAIT and POST that are available only to authorized programs are explained in this topic. The additional forms are:
  • Cross memory post (ASCB parameter specified).
  • Directly posting an ECB without invoking POST.
  • A branch entry for the EVENTS service.
  • POST exit routine defined by extended ECBs.
  • A branch entry for the POST service.
  • A branch entry for the WAIT service.
Parent topic: Serialization