CURLSHOPT_UNLOCKFUNC(3)    Library Functions Manual    CURLSHOPT_UNLOCKFUNC(3)

NAME
       CURLSHOPT_UNLOCKFUNC - mutex unlock callback

SYNOPSIS
       #include <curl/curl.h>

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

       CURLSHcode curl_share_setopt(CURLSH *share, CURLSHOPT_UNLOCKFUNC, unlockcb);

DESCRIPTION
       Set a mutex unlock callback for the share object. There is a
       corresponding CURLSHOPT_LOCKFUNC(3) callback called when the mutex is
       first locked.

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

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

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

       clientp is the private pointer you set with CURLSHOPT_USERDATA(3).
       This pointer is not used by libcurl itself.

PROTOCOLS
       All

EXAMPLE
       extern void mutex_unlock(CURL *, curl_lock_data, void *);

       int main(void)
       {
         CURLSHcode sh;
         CURLSH *share = curl_share_init();
         sh = curl_share_setopt(share, CURLSHOPT_UNLOCKFUNC, mutex_unlock);
         if(sh)
           printf("Error: %s\n", curl_share_strerror(sh));
       }

AVAILABILITY
       Added in 7.10

RETURN VALUE
       CURLSHE_OK (zero) means that the option was set properly, non-zero
       means an error occurred. See libcurl-errors(3) for the full list with
       descriptions.

SEE ALSO
       CURLSHOPT_LOCKFUNC(3), curl_share_cleanup(3), curl_share_init(3),
       curl_share_setopt(3)

libcurl                          April 26 2024         CURLSHOPT_UNLOCKFUNC(3)