mirror of
https://github.com/curl/curl.git
synced 2026-08-26 21:44:10 +03:00
e3fe020089
Remove the PROTOCOLS section from the source files completely and instead generate them based on the header data in the curldown files. It also generates TLS backend information for options marked for TLS as protocol. Closes #13175
68 lines
1.8 KiB
Markdown
68 lines
1.8 KiB
Markdown
---
|
|
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
SPDX-License-Identifier: curl
|
|
Title: CURLMOPT_MAX_TOTAL_CONNECTIONS
|
|
Section: 3
|
|
Source: libcurl
|
|
See-also:
|
|
- CURLMOPT_MAXCONNECTS (3)
|
|
- CURLMOPT_MAX_HOST_CONNECTIONS (3)
|
|
Protocol:
|
|
- All
|
|
---
|
|
|
|
# NAME
|
|
|
|
CURLMOPT_MAX_TOTAL_CONNECTIONS - max simultaneously open connections
|
|
|
|
# SYNOPSIS
|
|
|
|
~~~c
|
|
#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 is used as the maximum number
|
|
of simultaneously open connections in total using this multi handle. For each
|
|
new session, libcurl might open a new connection up to the limit set by
|
|
CURLMOPT_MAX_TOTAL_CONNECTIONS(3). When the limit is reached, new
|
|
sessions are held pending until there are available connections. If
|
|
CURLMOPT_PIPELINING(3) is enabled, libcurl can try 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 get queued up waiting for their chance. When that
|
|
happens, the CURLOPT_TIMEOUT_MS(3) timeout is 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.
|
|
|
|
# EXAMPLE
|
|
|
|
~~~c
|
|
int main(void)
|
|
{
|
|
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.
|