man curl_multi_init (Fonctions bibliothèques) - create a multi handle
NAME
curl_multi_init - create a multi handle
SYNOPSIS
#include <curl/curl.h> CURLM *curl_multi_init( );
DESCRIPTION
This function returns a CURLM handle to be used as input to all the other multi-functions, sometimes referred to as a multi handle on some places in the documentation. This init call MUST have a corresponding call to curl_multi_cleanup(3) when the operation is complete.
RETURN VALUE
If this function returns NULL, something went wrong and you cannot use the other curl functions.