--- libaitsched/inc/aitsched.h	2023/02/25 15:40:48	1.31.2.3
+++ libaitsched/inc/aitsched.h	2025/07/16 11:07:06	1.34
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: aitsched.h,v 1.31.2.3 2023/02/25 15:40:48 misho Exp $
+* $Id: aitsched.h,v 1.34 2025/07/16 11:07:06 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -12,7 +12,7 @@ terms:
 All of the documentation and software included in the ELWIX and AITNET
 Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
 
-Copyright 2004 - 2023
+Copyright 2004 - 2024
 	by Michael Pounov <misho@elwix.org>.  All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
@@ -259,6 +259,9 @@ struct sched_RootTask {
 #define ROOT_QUEUE_EMPTY(x, _q)	TAILQ_EMPTY(&((x)->root_##_q))
 #define ROOT_RETURN(x)	(x)->root_ret
 
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 int sched_GetErrno();
 const char *sched_GetError();
@@ -387,7 +390,7 @@ sched_task_t *schedQueryby(sched_root_task_t * __restr
  *
  * @root = root task
  * @on = Activate or =0 deactivate
- * return: -1 error or 0 ok
+ * return: -1 error, 1 already started, 2 another thread already started or 0 ok
  */
 int schedSignalDispatch(sched_root_task_t * __restrict root, int on);
 
@@ -767,5 +770,8 @@ void *sched_taskExit(sched_task_t *task, intptr_t retc
  */
 #define taskExit(t, x)		return sched_taskExit((t), (intptr_t) (x))
 
+#ifdef __cplusplus
+}
+#endif
 
 #endif