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 or DNS cache! This way, each
       single transfer will take 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).  Currently  you  can only share DNS and/or COOKIE
       data.

       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 option with curl_easy_setopt(3), and pass in  share  handle.
       You can make any number of easy handles share the same share handle.

       To  make  an easy handle stop using that particular share, you set CUR-
       LOPT_SHARE to NULL for that easy handle. To make a handle stop  sharing
       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 7.10.7                    8 Aug 2003                  libcurl-share(3)