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CURLMOPT_TIMERDATA(3) Library Functions Manual CURLMOPT_TIMERDATA(3) NAME CURLMOPT_TIMERDATA - custom pointer to pass to timer callback SYNOPSIS #include <curl/curl.h> CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_TIMERDATA, void *pointer); DESCRIPTION A data pointer to pass to the timer callback set with the CURLMOPT_TIMER- FUNCTION(3) option. This pointer is not touched by libcurl but is only be passed in to the timer callback's clientp argument. DEFAULT NULL PROTOCOLS This functionality affects all supported protocols EXAMPLE 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 >= 0) { /* this is the new single timeout to wait for */ } else { /* delete the timeout, nothing to wait for now */ } return 0; } 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); } AVAILABILITY Added in curl 7.16.0 RETURN VALUE curl_multi_setopt(3) returns a CURLMcode indicating success or error. CURLM_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3). SEE ALSO CURLMOPT_SOCKETFUNCTION(3), CURLMOPT_TIMERFUNCTION(3) libcurl 2026-06-11 CURLMOPT_TIMERDATA(3)
NAME | SYNOPSIS | DESCRIPTION | DEFAULT | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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