94 lines
3.4 KiB
Groff
94 lines
3.4 KiB
Groff
.\" **************************************************************************
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.\" * _ _ ____ _
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.\" * Project ___| | | | _ \| |
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.\" * / __| | | | |_) | |
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.\" * | (__| |_| | _ <| |___
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.\" * \___|\___/|_| \_\_____|
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.\" *
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.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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.\" *
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.\" * This software is licensed as described in the file COPYING, which
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.\" * you should have received as part of this distribution. The terms
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.\" * are also available at https://curl.se/docs/copyright.html.
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.\" *
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.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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.\" * copies of the Software, and permit persons to whom the Software is
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.\" * furnished to do so, under the terms of the COPYING file.
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.\" *
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.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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.\" * KIND, either express or implied.
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.\" *
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.\" * SPDX-License-Identifier: curl
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.\" *
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.\" **************************************************************************
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.TH curl_multi_add_handle 3 "4 March 2002" "libcurl" "libcurl"
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.SH NAME
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curl_multi_add_handle - add an easy handle to a multi session
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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CURLMcode curl_multi_add_handle(CURLM *multi_handle, CURL *easy_handle);
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.fi
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.SH DESCRIPTION
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Adds the \fIeasy handle\fP to the \fImulti_handle\fP.
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While an easy handle is added to a multi stack, you cannot and you must not
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use \fIcurl_easy_perform(3)\fP on that handle. After having removed the easy
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handle from the multi stack again, it is perfectly fine to use it with the
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easy interface again.
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If the easy handle is not set to use a shared (\fICURLOPT_SHARE(3)\fP) cache,
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it is made to use a DNS cache that is shared between all easy handles within
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the multi handle when \fIcurl_multi_add_handle(3)\fP is called.
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When an easy interface is added to a multi handle, it is set to use a shared
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connection cache owned by the multi handle. Removing and adding new easy
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handles does not affect the pool of connections or the ability to do
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connection reuse.
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If you have \fICURLMOPT_TIMERFUNCTION(3)\fP set in the multi handle (as you
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should if you are working event-based with \fIcurl_multi_socket_action(3)\fP
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and friends), that callback is called from within this function to ask for an
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updated timer so that your main event loop gets the activity on this handle to
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get started.
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The easy handle remains added to the multi handle until you remove it again
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with \fIcurl_multi_remove_handle(3)\fP - even when a transfer with that
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specific easy handle is completed.
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You should remove the easy handle from the multi stack before you terminate
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first the easy handle and then the multi handle:
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1 - \fIcurl_multi_remove_handle(3)\fP
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2 - \fIcurl_easy_cleanup(3)\fP
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3 - \fIcurl_multi_cleanup(3)\fP
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.SH EXAMPLE
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.nf
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int main(void)
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{
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/* init a multi stack */
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CURLM *multi = curl_multi_init();
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/* create two easy handles */
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CURL *http_handle = curl_easy_init();
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CURL *http_handle2 = curl_easy_init();
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/* add individual transfers */
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curl_multi_add_handle(multi, http_handle);
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curl_multi_add_handle(multi, http_handle2);
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}
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.fi
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.SH AVAILABILITY
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Added in 7.9.6
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.SH RETURN VALUE
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CURLMcode type, general libcurl multi interface error code.
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.SH "SEE ALSO"
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.BR curl_multi_cleanup (3),
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.BR curl_multi_get_handles (3),
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.BR curl_multi_init (3),
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.BR curl_multi_setopt (3),
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.BR curl_multi_socket_action (3)
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