1CURLOPT_STREAM_DEPENDS_E(3)curl_easy_setopt optionsCURLOPT_STREAM_DEPENDS_E(3)
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6 CURLOPT_STREAM_DEPENDS_E - stream this transfer depends on exclusively
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9 #include <curl/curl.h>
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11 CURLcode curl_easy_setopt(CURL *handle, CURLOPT_STREAM_DEPENDS_E,
12 CURL *dephandle);
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15 Pass a CURL * pointer in dephandle to identify the stream within the
16 same connection that this stream is depending upon exclusively. That
17 means it depends on it and sets the Exclusive bit.
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19 The spec says "Including a dependency expresses a preference to allo‐
20 cate resources to the identified stream rather than to the dependent
21 stream."
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23 Setting a dependency with the exclusive flag for a reprioritized stream
24 causes all the dependencies of the new parent stream to become depen‐
25 dent on the reprioritized stream.
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27 This option can be set during transfer.
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29 dephandle must not be the same as handle, that will cause this function
30 to return an error. It must be another easy handle, and it also needs
31 to be a handle of a transfer that will be sent over the same HTTP/2
32 connection for this option to have an actual effect.
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35 NULL
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38 HTTP/2
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41 CURL *curl = curl_easy_init();
42 CURL *curl2 = curl_easy_init(); /* a second handle */
43 if(curl) {
44 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/one");
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46 /* the second depends on the first */
47 curl_easy_setopt(curl2, CURLOPT_URL, "https://example.com/two");
48 curl_easy_setopt(curl2, CURLOPT_STREAM_DEPENDS_E, curl);
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50 /* then add both to a multi handle and transfer them! */
51 }
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54 Added in 7.46.0
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57 Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION
58 if not.
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61 CURLOPT_STREAM_WEIGHT(3), CURLOPT_STREAM_DEPENDS(3),
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65libcurl 7.85.0 May 17, 2022 CURLOPT_STREAM_DEPENDS_E(3)