curl_share_cleanup man page
curl_share_cleanup — Clean up a shared object
CURLSHcode curl_share_cleanup(CURLSH *share_handle);
This function deletes a shared object. The share handle cannot be used anymore when this function has been called.
CURLSHE_OK (zero) means that the option was set properly, non-zero means an error occurred as <curl/curl.h> defines. See the libcurl-errors.3 man page for the full list with descriptions. If an error occurs, then the share object will not be deleted.
curl_share_init(3), curl_share_setopt(3), libcurl-share(3).