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36 lines
1.2 KiB
Groff
36 lines
1.2 KiB
Groff
.TH iom_requeue 3
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.SH NAME
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iom_requeue \- re-add event to I/O multiplexer
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.SH SYNTAX
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.B #include <libowfat/io.h>
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int \fBiom_requeue\fP(iomux_t* c, int64 fd, unsigned int events);
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.SH DESCRIPTION
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iom_requeue adds an event you are interested in to an I/O multiplexer.
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\fIfd\fR is the file descriptor (usually a socket) you are interested
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in, and \fIevents\fR is the operation you want to do. It can be IOM_READ
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or IOM_WRITE.
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If that operation becomes possible on that descriptor, \fIiom_wait\fR
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will return and tell you the fd and the event.
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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_requeue\fR again if you are
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interested in more events for this descriptor. Do this only after you
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are done handling this event, otherwise \fIiom_wait\fR might indicate a
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new event to another thread while this thread is still working on the
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descriptor, leading to unexpected behavior.
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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_requeue returns 0 on success and -1 on error, setting errno.
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.SH "SEE ALSO"
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iom_init, iom_add, iom_wait, iom_abort
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