Provided by: libcurl4-doc_8.9.1-2ubuntu2.1_all bug

NAME

       CURLOPT_STREAM_DEPENDS_E - stream this transfer depends on exclusively

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 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

       This functionality affects http only

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_E, curl);

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

AVAILABILITY

       Added in curl 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(3),
       CURLOPT_STREAM_WEIGHT(3)