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47 lines
1.9 KiB
Groff
47 lines
1.9 KiB
Groff
.\" You can view this file with:
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.\" nroff -man [file]
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.\" $Id$
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.\"
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.TH libcurl-share 3 "8 Aug 2003" "libcurl 7.10.7" "libcurl share interface"
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.SH NAME
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libcurl-share \- how to use the share interface
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.SH DESCRIPTION
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This is an overview on how to use the libcurl share interface in your C
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programs. There are specific man pages for each function mentioned in
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here.
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All functions in the share interface are prefixed with curl_share.
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.SH "OBJECTIVES"
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The share interface was added to enable sharing of data between curl
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\&"handles".
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.SH "ONE SET OF DATA - MANY TRANSFERS"
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You can have multiple easy handles share data between them. Have them update
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and use the \fBsame\fP cookie database or DNS cache! This way, each single
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transfer will take advantage from data updates made by the other transfer(s).
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.SH "SHARE OBJECT"
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You create a shared object with \fIcurl_share_init(3)\fP. It returns a handle
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for a newly created one.
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You tell the shared object what data you want it to share by using
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\fIcurl_share_setopt(3)\fP. Currently you can only share DNS and/or COOKIE
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data.
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Since you can use this share from multiple threads, and libcurl has no
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internal thread synchronization, you must provide mutex callbacks if you're
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using this multi-threaded. You set lock and unlock functions with
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\fIcurl_share_setopt(3)\fP too.
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Then, you make an easy handle to use this share, you set the
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\fICURLOPT_SHARE\fP option with \fIcurl_easy_setopt(3)\fP, and pass in share
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handle. You can make any number of easy handles share the same share handle.
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To make an easy handle stop using that particular share, you set
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\fICURLOPT_SHARE\fP to NULL for that easy handle. To make a handle stop
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sharing a particular data, you can \fICURLSHOPT_UNSHARE\fP it.
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When you're done using the share, make sure that no easy handle is still using
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it, and call \fIcurl_share_cleanup(3)\fP on the handle.
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.SH "SEE ALSO"
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.BR curl_share_init "(3), " curl_share_setopt "(3), " curl_share_cleanup "(3)"
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