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e3fe020089
Remove the PROTOCOLS section from the source files completely and instead generate them based on the header data in the curldown files. It also generates TLS backend information for options marked for TLS as protocol. Closes #13175
78 lines
1.9 KiB
Markdown
78 lines
1.9 KiB
Markdown
---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_STREAM_DEPENDS_E
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Section: 3
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Source: libcurl
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See-also:
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- CURLMOPT_PIPELINING (3)
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- CURLOPT_HTTP_VERSION (3)
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- CURLOPT_STREAM_DEPENDS (3)
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- CURLOPT_STREAM_WEIGHT (3)
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Protocol:
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- HTTP
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---
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# NAME
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CURLOPT_STREAM_DEPENDS_E - stream this transfer depends on exclusively
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_STREAM_DEPENDS_E,
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CURL *dephandle);
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~~~
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# DESCRIPTION
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Pass a CURL pointer in *dephandle* to identify the stream within the same
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connection that this stream is depending upon exclusively. That means it
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depends on it and sets the Exclusive bit.
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The spec says "Including a dependency expresses a preference to allocate
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resources to the identified stream rather than to the dependent stream."
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Setting a dependency with the exclusive flag for a reprioritized stream causes
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all the dependencies of the new parent stream to become dependent on the
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reprioritized stream.
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This option can be set during transfer.
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*dephandle* must not be the same as *handle*, that makes this function return
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an error. It must be another easy handle, and it also needs to be a handle of
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a transfer that is about to be sent over the same HTTP/2 connection for this
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option to have an actual effect.
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# DEFAULT
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NULL
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# EXAMPLE
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~~~c
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int main(void)
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{
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CURL *curl = curl_easy_init();
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CURL *curl2 = curl_easy_init(); /* a second handle */
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if(curl) {
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/one");
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/* the second depends on the first */
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curl_easy_setopt(curl2, CURLOPT_URL, "https://example.com/two");
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curl_easy_setopt(curl2, CURLOPT_STREAM_DEPENDS_E, curl);
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/* then add both to a multi handle and transfer them! */
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}
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}
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~~~
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# AVAILABILITY
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Added in 7.46.0
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# RETURN VALUE
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Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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