curl-w32/docs/libcurl/opts/CURLMOPT_MAX_CONCURRENT_STREAMS.md

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---
c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
SPDX-License-Identifier: curl
Title: CURLMOPT_MAX_CONCURRENT_STREAMS
Section: 3
Source: libcurl
See-also:
- CURLMOPT_MAXCONNECTS (3)
- CURLOPT_MAXCONNECTS (3)
---
# NAME
CURLMOPT_MAX_CONCURRENT_STREAMS - max concurrent streams for http2
# SYNOPSIS
~~~c
#include <curl/curl.h>
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_MAX_CONCURRENT_STREAMS,
long max);
~~~
# DESCRIPTION
Pass a long indicating the **max**. The set number is used as the maximum
number of concurrent streams libcurl should support on connections done using
HTTP/2 or HTTP/3.
Valid values range from 1 to 2147483647 (2^31 - 1) and defaults to 100. The
value passed here would be honored based on other system resources properties.
# DEFAULT
100
# PROTOCOLS
All
# EXAMPLE
~~~c
int main(void)
{
CURLM *m = curl_multi_init();
/* max concurrent streams 200 */
curl_multi_setopt(m, CURLMOPT_MAX_CONCURRENT_STREAMS, 200L);
}
~~~
# AVAILABILITY
Added in 7.67.0
# RETURN VALUE
Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.