mirror of
https://github.com/curl/curl.git
synced 2024-11-27 05:50:21 +08:00
75 lines
3.0 KiB
Groff
75 lines
3.0 KiB
Groff
.\" **************************************************************************
|
|
.\" * _ _ ____ _
|
|
.\" * Project ___| | | | _ \| |
|
|
.\" * / __| | | | |_) | |
|
|
.\" * | (__| |_| | _ <| |___
|
|
.\" * \___|\___/|_| \_\_____|
|
|
.\" *
|
|
.\" * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
.\" *
|
|
.\" * This software is licensed as described in the file COPYING, which
|
|
.\" * you should have received as part of this distribution. The terms
|
|
.\" * are also available at https://curl.haxx.se/docs/copyright.html.
|
|
.\" *
|
|
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
|
.\" * copies of the Software, and permit persons to whom the Software is
|
|
.\" * furnished to do so, under the terms of the COPYING file.
|
|
.\" *
|
|
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
.\" * KIND, either express or implied.
|
|
.\" *
|
|
.\" **************************************************************************
|
|
.\"
|
|
.TH CURLMOPT_SOCKETFUNCTION 3 "3 Nov 2016" "libcurl 7.39.0" "curl_multi_setopt options"
|
|
.SH NAME
|
|
CURLMOPT_SOCKETFUNCTION \- callback informed about what to wait for
|
|
.SH SYNOPSIS
|
|
.nf
|
|
#include <curl/curl.h>
|
|
|
|
int socket_callback(CURL *easy, /* easy handle */
|
|
curl_socket_t s, /* socket */
|
|
int what, /* describes the socket */
|
|
void *userp, /* private callback pointer */
|
|
void *socketp); /* private socket pointer */
|
|
|
|
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_SOCKETFUNCTION, socket_callback);
|
|
.SH DESCRIPTION
|
|
Pass a pointer to your callback function, which should match the prototype
|
|
shown above.
|
|
|
|
When the \fIcurl_multi_socket_action(3)\fP function runs, it informs the
|
|
application about updates in the socket (file descriptor) status by doing
|
|
none, one, or multiple calls to the \fBsocket_callback\fP. The callback gets
|
|
status updates with changes since the previous time the callback was called.
|
|
If the given callback pointer is NULL, no callback will be called. Set the
|
|
callback's \fBuserp\fP argument with \fICURLMOPT_SOCKETDATA(3)\fP. See
|
|
\fIcurl_multi_socket_action(3)\fP for more details on how the callback is used
|
|
and should work.
|
|
|
|
The \fBwhat\fP parameter informs the callback on the status of the given
|
|
socket. It can hold one of these values:
|
|
.IP CURL_POLL_IN
|
|
Wait for incoming data. For the socket to become readable.
|
|
.IP CURL_POLL_OUT
|
|
Wait for outgoing data. For the socket to become writable.
|
|
.IP CURL_POLL_INOUT
|
|
Wait for incoming and outgoing data. For the socket to become readable or
|
|
writable.
|
|
.IP CURL_POLL_REMOVE
|
|
The specified socket/file descriptor is no longer used by libcurl.
|
|
.SH DEFAULT
|
|
NULL (no callback)
|
|
.SH PROTOCOLS
|
|
All
|
|
.SH EXAMPLE
|
|
TODO
|
|
.SH AVAILABILITY
|
|
Added in 7.15.4
|
|
.SH RETURN VALUE
|
|
Returns CURLM_OK.
|
|
.SH "SEE ALSO"
|
|
.BR CURLMOPT_SOCKETDATA "(3), " curl_multi_socket_action "(3), "
|
|
.BR CURLMOPT_TIMERFUNCTION "(3) "
|
|
|