1CURLOPT_STREAM_DEPENDS_E(3)curl_easy_setopt optionsCURLOPT_STREAM_DEPENDS_E(3)
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6 CURLOPT_STREAM_DEPENDS_E - set stream this transfer depends on exclu‐
7 sively
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10 #include <curl/curl.h>
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12 CURLcode curl_easy_setopt(CURL *handle, CURLOPT_STREAM_DEPENDS_E, CURL
13 *dephandle);
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16 Pass a CURL * pointer in dephandle to identify the stream within the
17 same connection that this stream is depending upon exclusively. That
18 means it depends on it and sets the Exclusive bit.
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20 The spec says "Including a dependency expresses a preference to allo‐
21 cate resources to the identified stream rather than to the dependent
22 stream."
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24 Setting a dependency with the exclusive flag for a reprioritized stream
25 causes all the dependencies of the new parent stream to become depen‐
26 dent on the reprioritized stream.
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28 This option can be set during transfer.
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30 dephandle must not be the same as handle, that will cause this function
31 to return an error. It must be another easy handle, and it also needs
32 to be a handle of a transfer that will be sent over the same HTTP/2
33 connection for this option to have an actual effect.
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36 NULL
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39 HTTP/2
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42 CURL *curl = curl_easy_init();
43 CURL *curl2 = curl_easy_init(); /* a second handle */
44 if(curl) {
45 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/one");
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47 /* the second depends on the first */
48 curl_easy_setopt(curl2, CURLOPT_URL, "https://example.com/two");
49 curl_easy_setopt(curl2, CURLOPT_STREAM_DEPENDS_E, curl);
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51 /* then add both to a multi handle and transfer them! */
52 }
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55 Added in 7.46.0
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58 Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION
59 if not.
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62 CURLOPT_STREAM_WEIGHT(3), CURLOPT_STREAM_DEPENDS(3),
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66libcurl 7.64.0 April 17, 2018 CURLOPT_STREAM_DEPENDS_E(3)