NAME

       CURLOPT_STREAM_DEPENDS - set stream this transfer depends on

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_STREAM_DEPENDS, CURL *dephandle);

DESCRIPTION

       Pass  a CURL * pointer in dephandle to identify the stream within the same connection that
       this stream is depending upon. This option  clears  the  exclusive  bit  and  is  mutually
       exclusive to the CURLOPT_STREAM_DEPENDS_E(3) option.

       The  spec says "Including a dependency expresses a preference to allocate resources to the
       identified stream rather than to the dependent stream."

       This option can be set during transfer.

       dephandle must not be the same as handle, that will  cause  this  function  to  return  an
       error. It must be another easy handle, and it also needs to be a handle of a transfer that
       will be sent over the same HTTP/2 connection for this option to have an actual effect.

DEFAULT

       NULL

PROTOCOLS

       HTTP/2

EXAMPLE

       CURL *curl = curl_easy_init();
       CURL *curl2 = curl_easy_init(); /* a second handle */
       if(curl) {
         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/one");

         /* the second depends on the first */
         curl_easy_setopt(curl2, CURLOPT_URL, "https://example.com/two");
         curl_easy_setopt(curl2, CURLOPT_STREAM_DEPENDS, curl);

         /* then add both to a multi handle and transfer them! */
       }

AVAILABILITY

       Added in 7.46.0

RETURN VALUE

       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO

       CURLOPT_STREAM_WEIGHT(3), CURLOPT_STREAM_DEPENDS_E(3),