NAME

       CURLOPT_STREAM_DEPENDS - 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 makes this function return an error. It  must  be  another
       easy handle, and it also needs to be a handle of a transfer that is about to be sent over the same HTTP/2
       connection for this option to have an actual effect.

DEFAULT

       NULL

PROTOCOLS

       HTTP/2

EXAMPLE

       int main(void)
       {
         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

       CURLMOPT_PIPELINING(3), CURLOPT_HTTP_VERSION(3), CURLOPT_STREAM_DEPENDS_E(3), CURLOPT_STREAM_WEIGHT(3)