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.TH CURLSHOPT_UNLOCKFUNC 3 "8 Aug 2003" "libcurl 7.10.7" "libcurl Manual"
.SH NAME
CURLSHOPT_UNLOCKFUNC - mutex unlock callback
.SH SYNOPSIS
.nf
#include <curl/curl.h>

void unlockcb(CURL *handle, curl_lock_data data, void *userptr);

CURLSHcode curl_share_setopt(CURLSH *share, CURLSHOPT_UNLOCKFUNC, unlockcb);
.fi
.SH DESCRIPTION
Set a mutex unlock callback for the share object. There's a corresponding
\fICURLSHOPT_LOCKFUNC(3)\fP callback called when the mutex is first locked.

The \fIunlockcb\fP argument must be a pointer to a function matching the
prototype shown above. The arguments to the callback are:

\fIhandle\fP is the currently active easy handle in use when the share object
is released.

The \fIdata\fP argument tells what kind of data libcurl wants to unlock. Make
sure that the callback uses a different lock for each kind of data.

\fIaccess\fP defines what access type libcurl wants, shared or single.

\fIuserptr\fP is the private pointer you set with \fICURLSHOPT_USERDATA\fP.
This pointer is not used by libcurl itself.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
  CURLSHcode sh;
  share = curl_share_init();
  sh = curl_share_setopt(share, CURLSHOPT_UNLOCKFUNC, mutex_unlock);
  if(sh)
    printf("Error: %s\\n", curl_share_strerror(sh));
.fi
.SH AVAILABILITY
Added in 7.10
.SH RETURN VALUE
CURLSHE_OK (zero) means that the option was set properly, non-zero means an
error occurred. See \fIlibcurl-errors(3)\fP for the full list with
descriptions.
.SH "SEE ALSO"
.BR CURLSHOPT_LOCKFUNC "(3), "
.BR curl_share_setopt "(3), " curl_share_cleanup "(3), " curl_share_init "(3)"