libcurl-share

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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 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 han-
       dle 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)