mirror of
https://github.com/curl/curl.git
synced 2024-11-27 05:50:21 +08:00
59 lines
2.1 KiB
Groff
59 lines
2.1 KiB
Groff
.\" $Id$
|
|
.\"
|
|
.\" Copyright 1998 by Daniel Stenberg
|
|
.\"
|
|
.\" 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_GETSOCK 3 "22 December 2005"
|
|
.SH NAME
|
|
ares_getsock \- get file descriptors to wait on
|
|
.SH SYNOPSIS
|
|
.nf
|
|
.B #include <ares.h>
|
|
.PP
|
|
.B int ares_getsock(ares_channel \fIchannel\fP, int *\fIsocks\fP,
|
|
.B int \fInumsocks\fP);
|
|
.fi
|
|
.SH DESCRIPTION
|
|
The
|
|
.B ares_getsock
|
|
function retrieves the set of file descriptors which the calling
|
|
application should wait on for reading and/or writing for the
|
|
processing of name service queries pending on the name service channel
|
|
identified by
|
|
.IR channel .
|
|
File descriptors will be set in the integer array pointed to by
|
|
\fIsocks\fP.
|
|
\fInumsocks\fP is the size of the given array in number of ints.
|
|
|
|
This function can only return information about up to 16 sockets. If more are
|
|
in use (however unlikely that is), they are simply not reported back.
|
|
.SH RETURN VALUES
|
|
\fBares_getsock\fP returns a bitmask for what actions to wait for on the
|
|
different sockets. The ares.h header file provides these convenience macros to
|
|
extract the information appropriately:
|
|
|
|
.nf
|
|
#define ARES_GETSOCK_MAXNUM 16 /* ares_getsock() can return info about
|
|
this many sockets */
|
|
#define ARES_GETSOCK_READABLE(bits,num) (bits & (1<< (num)))
|
|
#define ARES_GETSOCK_WRITABLE(bits,num) (bits & (1 << ((num) + \
|
|
ARES_GETSOCK_MAXNUM)))
|
|
.fi
|
|
.SH NOTES
|
|
This function was added in c-ares 1.3.1
|
|
.SH SEE ALSO
|
|
.BR ares_timeout (3),
|
|
.BR ares_fds (3),
|
|
.BR ares_process (3)
|