Just FYI: semtimedop is a special syscalls that implements a semop with a timeout. It was added just for the purpose of avoiding the setitimer calls.
I know that it's supported by Solaris and recent Linux versions, I'm not sure about other operating systems.
Has anyone tried to use it? Oracle pushed it to Linux, it seems to be worth the effort:
http://www.ussg.iu.edu/hypermail/linux/kernel/0211.3/0485.html
-- Manfred
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