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.TH io_waituntil 3
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.SH NAME
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io_waituntil \- wait for events
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.SH SYNTAX
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.B #include <libowfat/io.h>
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void \fBio_waituntil\fP(tai6464 t);
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.SH DESCRIPTION
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io_waituntil(t) is like io_wait() but does not wait (noticeably) past time \fIt\fR.
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.SH NOTE
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Depending on the underlying operating system primitive, there is a
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potential race condition to be aware of. Some event notification
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mechanisms (for example, kqueue on BSD and epoll on Linux) will return
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multiple events. If your application operates on pairs of file
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descriptors (a proxy server maybe), and an error on one descriptor
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can lead to closing the other descriptor, then an outstanding event on
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the other descriptor can still be queued for delivery to you. Be
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prepared to receive events for a descriptor that has already been
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closed.
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.SH "SEE ALSO"
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io_wait(3), io_check(3), io_wantread(3), io_wantwrite(3), io_fd(3)
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