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  1.  Home
  2. RPG400-L
  3. October 2010

takedescriptor and timeouts


Hi all,

We have some code that listens on a takedescriptor and want to put a timeout on it. If the timeout is reached then we'll can the job.

I tried:

alarm(seconds);

sd = takedescriptor(*null);

alarm(0);

But takedescriptor blocks!

The handler procedure set for alarm isn't called when the time runs out. Once the timeout has occurred nothing happens. If I pass a descriptor after this timeout period takedescriptor completes and the handler procedure is THEN called. So SIGALRM is being blocked by takedescriptor until it completes.

Any of you guys/gals have an alternative solution? I know other signals can not be blocked but I need a timer-based solution so a call to kill wont do it. Also, I can't replace takedescriptor with rcvmsg because other processes are using givedescriptor, not sndmsg.

Any and all help is welcome.

Cheers

Larry Ducie



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