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ares_cancel.3
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ares_cancel.3
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.\"
.\" Copyright 1998 by the Massachusetts Institute of Technology.
.\"
.\" Permission to use, copy, modify, and distribute this
.\" software and its documentation for any purpose and without
.\" fee is hereby granted, provided that the above copyright
.\" notice appear in all copies and that both that copyright
.\" notice and this permission notice appear in supporting
.\" documentation, and that the name of M.I.T. not be used in
.\" advertising or publicity pertaining to distribution of the
.\" software without specific, written prior permission.
.\" M.I.T. makes no representations about the suitability of
.\" this software for any purpose. It is provided "as is"
.\" without express or implied warranty.
.\"
.TH ARES_CANCEL 3 "31 March 2004"
.SH NAME
ares_cancel \- Cancel a resolve
.SH SYNOPSIS
.nf
#include <ares.h>
void ares_cancel(ares_channel \fIchannel\fP)
.fi
.SH DESCRIPTION
The \fBares_cancel(3)\fP function cancels all lookups/requests made on the the
name service channel identified by \fIchannel\fP. \fBares_cancel(3)\fP
invokes the callbacks for each pending query on the channel, passing a status
of
.BR ARES_ECANCELLED .
These calls give the callbacks a chance to clean up any state which might have
been stored in their arguments. If such a callback invocation adds a new
request to the channel, that request will \fInot\fP be cancelled by the
current invocation of \fBares_cancel(3)\fP.
.SH SEE ALSO
.BR ares_init (3)
.BR ares_destroy (3)
.SH NOTES
This function was added in c-ares 1.2.0
c-ares 1.6.0 and earlier pass a status of
.BR ARES_ETIMEOUT
instead of
.BR ARES_ECANCELLED .
.SH AUTHOR
Dirk Manske