DragonFly On-Line Manual Pages

Search: Section:  

CURLMOPT_MAX_TOTAL_CONNECTIONS(3)   libcurl  CURLMOPT_MAX_TOTAL_CONNECTIONS(3)


NAME

       CURLMOPT_MAX_TOTAL_CONNECTIONS - max simultaneously open connections


SYNOPSIS

       #include <curl/curl.h>

       CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_MAX_TOTAL_CONNECTIONS,
                                   long amount);


DESCRIPTION

       Pass a long for the amount. The set number will be used as the maximum
       number of simultaneously open connections in total using this multi
       handle. For each new session, libcurl will open a new connection up to
       the limit set by CURLMOPT_MAX_TOTAL_CONNECTIONS(3). When the limit is
       reached, the sessions will be pending until there are available
       connections. If CURLMOPT_PIPELINING(3) is enabled, libcurl will try to
       use multiplexing if the host is capable of it.

       When more transfers are added to the multi handle than what can be
       performed due to the set limit, they will be queued up waiting for
       their chance. When that happens, the CURLOPT_TIMEOUT_MS(3) timeout will
       be counted inclusive of the waiting time, meaning that if you set a too
       narrow timeout in such a case the transfer might never even start
       before it times out.

       Even in the queued up situation, the CURLOPT_CONNECTTIMEOUT_MS(3)
       timeout is however treated as a per-connect timeout.


DEFAULT

       The default value is 0, which means that there is no limit. It is then
       simply controlled by the number of easy handles added.


PROTOCOLS

       All


EXAMPLE

       CURLM *m = curl_multi_init();
       /* never do more than 15 connections */
       curl_multi_setopt(m, CURLMOPT_MAX_TOTAL_CONNECTIONS, 15L);


AVAILABILITY

       Added in 7.30.0


RETURN VALUE

       Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION
       if not.


SEE ALSO

       CURLMOPT_MAXCONNECTS(3), CURLMOPT_MAX_HOST_CONNECTIONS(3),

ibcurl 8.1.2                    April 26, 2023
                                             CURLMOPT_MAX_TOTAL_CONNECTIONS(3)

Search: Section: