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CURLOPT_STREAM_DEPENDS_E(3) Library Functions Manual CURLOPT_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 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 curl_easy_setopt(3) returns a CURLcode indicating success or error. CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3). SEE ALSO CURLMOPT_PIPELINING(3), CURLOPT_HTTP_VERSION(3), CURLOPT_STREAM_DEPENDS(3), CURLOPT_STREAM_WEIGHT(3) libcurl 2026-06-11 CURLOPT_STREAM_DEPENDS_E(3)
NAME | SYNOPSIS | DESCRIPTION | DEFAULT | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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