[pjlib] EINTR errno status in pj_ioqueue_poll() in ioqueue_epoll.c

[simonmychen@xxxxxxxxxxx (Simon Chen)]

Hello,

    When I try to use the gdb to run the test program of pjlib, I found the pj_ioqueue_epoll() will return the EINTR error statue. It is caused by the os_epoll_wait(). I get some information by google. It mentions that EINTR is not an error of os_epoll_wait. If this is happened, you can try to call os_epoll_wait again to finish the action. I suggest add some code to escape this errno. Is there any other suggestion about this situation? 

P.S. I still found some information about that the EINTR errno status in many system call (read/write/poll/sem_wait ....). pjlib should to handle these situation?

Simon Chen
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