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62 lines
1.5 KiB
Groff
62 lines
1.5 KiB
Groff
.\" generated by cd2nroff 0.1 from CURLMOPT_SOCKETDATA.md
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.TH CURLMOPT_SOCKETDATA 3 "2024-07-29" libcurl
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.SH NAME
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CURLMOPT_SOCKETDATA \- custom pointer passed to the socket callback
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_SOCKETDATA, void *pointer);
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.fi
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.SH DESCRIPTION
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A data \fIpointer\fP to pass to the socket callback set with the
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\fICURLMOPT_SOCKETFUNCTION(3)\fP option.
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This pointer is not touched by libcurl but is only passed in as the socket
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callback\(aqs \fBclientp\fP argument.
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.SH DEFAULT
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NULL
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.SH PROTOCOLS
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This functionality affects all supported protocols
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.SH EXAMPLE
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.nf
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struct priv {
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void *ours;
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};
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static int sock_cb(CURL *e, curl_socket_t s, int what, void *cbp, void *sockp)
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{
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struct priv *p = sockp;
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printf("my ptr: %p\\n", p->ours);
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if(what == CURL_POLL_REMOVE) {
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/* remove the socket from our collection */
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}
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if(what & CURL_POLL_IN) {
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/* wait for read on this socket */
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}
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if(what & CURL_POLL_OUT) {
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/* wait for write on this socket */
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}
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return 0;
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}
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int main(void)
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{
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struct priv setup;
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CURLM *multi = curl_multi_init();
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/* ... use socket callback and custom pointer */
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curl_multi_setopt(multi, CURLMOPT_SOCKETFUNCTION, sock_cb);
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curl_multi_setopt(multi, CURLMOPT_SOCKETDATA, &setup);
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}
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.fi
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.SH AVAILABILITY
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Added in curl 7.15.4
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.SH RETURN VALUE
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Returns CURLM_OK.
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.SH SEE ALSO
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.BR CURLMOPT_SOCKETFUNCTION (3),
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.BR CURLMOPT_TIMERFUNCTION (3),
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.BR curl_multi_socket_action (3)
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