libcurl-share.3
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- ." You can view this file with:
- ." nroff -man [file]
- ." $Id: libcurl-share.3,v 1.2 2004/03/15 10:23:14 bagder Exp $
- ."
- .TH libcurl-share 3 "8 Aug 2003" "libcurl 7.10.7" "libcurl share interface"
- .SH NAME
- libcurl-share - how to use the share interface
- .SH 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.
- .SH "OBJECTIVES"
- The share interface was added to enable sharing of data between curl
- &"handles".
- .SH "ONE SET OF DATA - MANY TRANSFERS"
- You can have multiple easy handles share data between them. Have them update
- and use the fBsamefP cookie database or DNS cache! This way, each single
- transfer will take advantage from data updates made by the other transfer(s).
- .SH "SHARE OBJECT"
- You create a shared object with fIcurl_share_init(3)fP. It returns a handle
- for a newly created one.
- You tell the shared object what data you want it to share by using
- fIcurl_share_setopt(3)fP. 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
- fIcurl_share_setopt(3)fP too.
- Then, you make an easy handle to use this share, you set the
- fICURLOPT_SHAREfP option with fIcurl_easy_setopt(3)fP, 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
- fICURLOPT_SHAREfP to NULL for that easy handle. To make a handle stop
- sharing a particular data, you can fICURLSHOPT_UNSHAREfP it.
- When you're done using the share, make sure that no easy handle is still using
- it, and call fIcurl_share_cleanup(3)fP on the handle.
- .SH "SEE ALSO"
- .BR curl_share_init "(3), " curl_share_setopt "(3), " curl_share_cleanup "(3)"