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I want to notify a working thread with a signal - that it should stop waiting events and check some global conditions. I use epoll_pwait on Linux, and I want to do the same on Mac OS.

But kqueue(2) manual says:

EVFILT_SIGNAL ... Only signals sent to the process, not to a particular thread, will trigger the filter.

How to overcome this limitation? Or may be there is another good way to notify sole thread waiting on kevent?

abyss.7
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1 Answers1

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Universal method for any I/O multiplexing API is:

  1. Open a pipe using pipe() function,
  2. Add its read end to your kevent/epoll/whatever set,
  3. Write something to another end of the pipe to wakeup your event poller.
Constantin Baranov
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