You create a shared object with curl_share_init(3). It returns a handle
for a newly created one.
You tell the shared object what data you want it to share by using
Since you can use this share from multiple threads, and libcurl has no
internal thread synchronization, you must provide mutex callbacks if youre
using this multi-threaded. You set lock and unlock functions with
Then, you make an easy handle to use this share, you set the
CURLOPT_SHARE(3) option with curl_easy_setopt(3), and pass in
share handle. You can make any number of easy handles share the same share
To make an easy handle stop using that particular share, you set
CURLOPT_SHARE(3) to NULL for that easy handle. To make a handle stop
sharing a particular data, you can CURLSHOPT_UNSHARE it.
When youre done using the share, make sure that no easy handle is still using
it, and call curl_share_cleanup(3) on the handle.