NAME

       CURLOPT_STREAM_DEPENDS_E - set stream this transfer depends on execlusively

SYNOPSIS

       #include <curl/curl.h>

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

DESCRIPTION

       Pass  a CURL * pointer in dephandle to identify the stream within the same connection that
       this stream is depending upon exclusively. That means  it  depends  on  it  and  sets  the
       Exclusive bit.

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

       Setting a dependency with the exclusive flag for a reprioritized  stream  causes  all  the
       dependencies of the new parent stream to become dependent on the reprioritized 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_E, 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(3),