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libcurl-share(3)            libcurl share interface           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!
       This way, each single transfer will take advantage  from  data  updates
       made by the other transfer(s). The sharing interface, however, does not
       share active or persistent connections between different easy  handles.


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're  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 it.

       When  you're  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_init(3),     curl_share_setopt(3),     curl_share_cleanup(3)
       libcurl-errors(3), libcurl-easy(3), libcurl-multi(3)



libcurl 7.10.7                    8 Aug 2003                  libcurl-share(3)

Mac OS X 10.11.6 - Generated Fri Feb 3 18:46:54 CST 2017
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