60 lines
1.9 KiB
Groff
60 lines
1.9 KiB
Groff
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.\" generated by cd2nroff 0.1 from CURLOPT_STREAM_DEPENDS.md
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.TH CURLOPT_STREAM_DEPENDS 3 "2025-07-07" libcurl
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.SH NAME
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CURLOPT_STREAM_DEPENDS \- stream this transfer depends on
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_STREAM_DEPENDS,
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CURL *dephandle);
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.fi
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.SH DESCRIPTION
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Pass a CURL pointer in \fIdephandle\fP to identify the stream within the same
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connection that this stream is depending upon. This option clears the
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exclusive bit and is mutually exclusive to the \fICURLOPT_STREAM_DEPENDS_E(3)\fP
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option.
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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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This option can be set during transfer.
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\fIdephandle\fP must not be the same as \fIhandle\fP, 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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.SH DEFAULT
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NULL
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.SH PROTOCOLS
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This functionality affects http only
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.SH EXAMPLE
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.nf
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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, 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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.fi
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.SH AVAILABILITY
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Added in curl 7.46.0
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.SH RETURN VALUE
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\fIcurl_easy_setopt(3)\fP returns a CURLcode indicating success or error.
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CURLE_OK (0) means everything was OK, non\-zero means an error occurred, see
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\fIlibcurl\-errors(3)\fP.
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.SH SEE ALSO
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.BR CURLMOPT_PIPELINING (3),
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.BR CURLOPT_HTTP_VERSION (3),
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.BR CURLOPT_STREAM_DEPENDS_E (3),
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.BR CURLOPT_STREAM_WEIGHT (3)
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