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Event handler, process trigger

  • hi,

    i have a source which polls once every 60 secs...

    i have alarm limits which trigger process commands (batch file) via event handler..

    the external device which is communicated with via the batch file enters a busy state during communication.

    my scripts etc cater for this by port checking..

    problem is, due to polling, if 2 event handlers trigger at exactly the same time, neither one really gets a head start on the other, so neither sees the port busy.

    basically i cannot handle simultaneous triggers...

    is there a global setting for staggering process commands? 5 seconds should do it.



  • Can you use some kind of O/S-level semaphore? lockfile() maybe?