FreeBSD Manual Pages
libcurl-share(3) Library Functions Manual libcurl-share(3) NAME libcurl-share - how to use the share interface DESCRIPTION This is an overview on how to use the libcurl share interface in your C programs. There are specific man pages for each function mentioned in here. All functions in the share interface are prefixed with curl_share. OBJECTIVES The share interface was added to enable sharing of data between curl handles. ONE SET OF DATA - MANY TRANSFERS You can have multiple easy handles share data between them. Have them update and use the same cookie database, DNS cache, TLS session cache and/or connection cache. This way, each single transfer takes advantage from data updates made by the other transfer(s). SHARE OBJECT 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 curl_share_setopt(3). Since you can use this share from multiple threads, and libcurl has no internal thread synchronization, you must provide mutex callbacks if you are using this multi-threaded. You set lock and unlock functions with curl_share_setopt(3) too. Then, you make an easy handle to use this share, you set the CUR- LOPT_SHARE(3) option with curl_easy_setopt(3), and pass in share han- dle. You can make any number of easy handles share the same share han- dle. To make an easy handle stop using that particular share, you set CUR- LOPT_SHARE(3) to NULL for that easy handle. To make a handle stop shar- ing a particular data, you can CURLSHOPT_UNSHARE(3) it. When you are done using the share, make sure that no easy handle is still using it, and call curl_share_cleanup(3) on the handle. SEE ALSO curl_share_cleanup(3), curl_share_init(3), curl_share_setopt(3), libcurl-easy(3), libcurl-errors(3), libcurl-multi(3) libcurl 2025-06-03 libcurl-share(3)
NAME | DESCRIPTION | OBJECTIVES | ONE SET OF DATA - MANY TRANSFERS | SHARE OBJECT | SEE ALSO
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