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CURLOPT_STREAM_DEPENDS_E(3)curl_easy_setopt optionsCURLOPT_STREAM_DEPENDS_E(3)

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	 allo-
       cate  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	depen-
       dent 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),

libcurl	7.79.1		      September	08, 2021   CURLOPT_STREAM_DEPENDS_E(3)

NAME | SYNOPSIS | DESCRIPTION | DEFAULT | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO

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