: Thank you for your comment.
:
: I have two cases in that select() should returns,
: . when any of the descriptors are ready
: . when a specific signal(ie, SIGUSR1) is pending
:
: What I want to do is like this:
:
: unblock SIGUSR1
: select();
: block SIGUSR1
:
: This code seems good, but has a problem.
: If a SIGUSR1 signal arrives between unblock and select(), the signal is
: lost. so, select() can sleep forerver.
This isn't as elegant, but would something like the following work?
BLOCK SIGUSR1
nullWait.tv_sec = 0;
nullWait.tv_usec = 0;
descriptorReadyFlag = FALSE;
done = FALSE;
while (!done)
{
numReady = select(maxFd+1, &readSet, &writeSet, &excptSet, &nullWait);
assert (sigpending(&pendingSet) == 0);
if (sigismember(&pendingSet, SIGUSR1)) {
done = TRUE;
UNBLOCK SIGUSR1 /* using sigprocmask */
}
if (numReady > 0) {
done = TRUE;
descriptorReadyFlag = TRUE;
}
}
--
Justin Gamble
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