Pthread blocking I/O

[Titus von Boxberg]

Hi,

I use two threads to do I/O for a process.
The I/O takes place either on a socket or 
an I/O device (com port) file descriptor.

Apparently it is not possible to shutdown those
threads from a third thread, neither using close nor shutdown(2) for
the socket I/O if the threads are blocked during read.

What methods can one use to unblock such a blocked-on-read
thread?

Thanks,

TITUS


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