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39 lines
1.3 KiB
Groff
39 lines
1.3 KiB
Groff
7 years ago
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.TH iom_wait 3
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.SH NAME
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iom_wait \- wait for event from I/O multiplexer
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.SH SYNTAX
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.B #include <libowfat/io.h>
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int \fBiom_wait\fP(iomux_t* c,
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int64* fd, unsigned int* events,
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unsigned long timeout);
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.SH DESCRIPTION
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iom_wait will wait for events registered to the I/O multiplexer with
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\fIiom_add\fR. It will wait \fItimeout\fR milliseconds.
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If during that time any of the registered events occur, \fIiom_wait\fR
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will set \fIfd\fR to the file descriptor the event happened on, and
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\fIevents\fR to the sum of IOM_READ, IOM_WRITE and IOM_ERROR, depending
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on what event actually happened, and return 1.
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If nothing happens during that time, it will return 0 and leave \fIfd\fR
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and \fIevents\fR alone.
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Note that the event registration is removed from the iomux_t context if
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it occurs. You will have to call \fIiom_wait\fR again after you handled
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the event, if you are still interested in it.
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Closing a file descriptor with registered events will discard the event
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registration.
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.SH "LINKING"
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You may have to add \fI-lpthread\fR to the command line in the linking
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step.
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.SH "RETURN VALUE"
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iom_wait returns 1 on success, 0 if there was a timeout, and -1 on
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error, setting errno. If \fIiom_abort\fR was called on the I/O
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multiplexer context, it will return -2.
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.SH "SEE ALSO"
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iom_init, iom_add, iom_abort
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