.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
-.\" * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
void lock_function(CURL *handle, curl_lock_data data, curl_lock_access access,
void *userptr);
-\fIdata\fP defines what data libcurl wants to lock, and you must make sure that
-only one lock is given at any time for each kind of data.
+The \fIdata\fP argument tells what kind of data libcurl wants to lock. 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.