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diff --git a/src/LuaSL/LuaSL_threads.h b/src/LuaSL/LuaSL_threads.h
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+++ b/src/LuaSL/LuaSL_threads.h
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+/* This code is heavily based on luaproc.
+ *
+ * The luaproc copyright notice and license is -
+
+ ***************************************************
+
+Copyright 2008 Alexandre Skyrme, Noemi Rodriguez, Roberto Ierusalimschy
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+ ****************************************************
+ *
+ * Additions and changes Copyright 2012 by David Seikel, using the above license.
+ */
+
+#ifndef __LUASL_THREADS_H__
+#define __LUASL_THREADS_H__
+
+/* scheduler function return constants */
+#define LUAPROC_SCHED_OK                0
+#define LUAPROC_SCHED_SOCKET_ERROR      -1
+#define LUAPROC_SCHED_SETSOCKOPT_ERROR  -2
+#define LUAPROC_SCHED_BIND_ERROR        -3
+#define LUAPROC_SCHED_LISTEN_ERROR      -4
+#define LUAPROC_SCHED_FORK_ERROR        -5
+#define LUAPROC_SCHED_PTHREAD_ERROR     -6
+#define LUAPROC_SCHED_INIT_ERROR        -7
+
+
+void luaprocInit(void);
+int sched_create_worker(void);
+void newProc(const char *code, int file, script *lp);
+const char *sendToChannel(gameGlobals *ourGlobals, const char *SID, const char *message);
+
+/* join all worker threads and exit */
+void sched_join_workerthreads(void);
+
+#endif