hi all:I am using multi socket,however , I am confused with this API,

int timer_callback(CURLM *multi,    /* multi handle */
                    long timeout_ms, /* see above */
                    void *userp);    /* private callback pointer */
 
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_TIMERFUNCTION, 
timer_callback);


and I know that when the timeout changed,the callback function are called, 
however,the first time we register the callback function ,for example:


curl_multi_setopt(handle, CURLMOPT_TIMERFUNCTION, timer_cb);
and the callback function is 
int timer_cb(CURLM *multi, long timeout_ms,void *userp)
{
......
}
the second paramenter timeout_ms value is ?.  and I read the docs/example 
hiperfifo.c ,and I see the log ,this value is 1ms,how did this value come?


thanks 


knuth


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