Unshare

A transfer uses the share object during its transfer and shares what that object has been specified to share with other handles sharing the same object.

In a subsequent transfer, CURLOPT_SHARE can be set to NULL to prevent a transfer from continuing to share. In that case, the handle may start the next transfer with empty caches for the data that was previously shared.

Between two transfers, a share object can also get updated to share a different set of properties so that the handles that share that object share a different set of data next time. You remove an item to share from a shared object with the curl_share_setopt()’s CURLSHOPT_UNSHARE option like this when unsharing DNS data:

curl_share_setopt(share, CURLSHOPT_UNSHARE, CURL_LOCK_DATA_DNS);