.\" generated by cd2nroff 0.1 from CURLMOPT_TIMERDATA.md .TH CURLMOPT_TIMERDATA 3 "2024-10-20" libcurl .SH NAME CURLMOPT_TIMERDATA \- custom pointer to pass to timer callback .SH SYNOPSIS .nf #include CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_TIMERDATA, void *pointer); .fi .SH DESCRIPTION A data \fBpointer\fP to pass to the timer callback set with the \fICURLMOPT_TIMERFUNCTION(3)\fP option. This pointer is not touched by libcurl but is only be passed in to the timer callback\(aqs \fBclientp\fP argument. .SH DEFAULT NULL .SH PROTOCOLS This functionality affects all supported protocols .SH EXAMPLE .nf struct priv { void *custom; }; static int timerfunc(CURLM *multi, long timeout_ms, void *clientp) { struct priv *mydata = clientp; printf("our ptr: %p\\n", mydata->custom); if(timeout_ms) { /* this is the new single timeout to wait for */ } else { /* delete the timeout, nothing to wait for now */ } } int main(void) { struct priv mydata; CURLM *multi = curl_multi_init(); curl_multi_setopt(multi, CURLMOPT_TIMERFUNCTION, timerfunc); curl_multi_setopt(multi, CURLMOPT_TIMERDATA, &mydata); } .fi .SH AVAILABILITY Added in curl 7.16.0 .SH RETURN VALUE Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not. .SH SEE ALSO .BR CURLMOPT_SOCKETFUNCTION (3), .BR CURLMOPT_TIMERFUNCTION (3)