From: bernie <bernie@38d2e660-2303-0410-9eaa-f027e97ec537>
Date: Tue, 19 Oct 2004 08:22:09 +0000 (+0000)
Subject: msg_peek(): New function.
X-Git-Tag: 1.0.0~1000
X-Git-Url: https://codewiz.org/gitweb?a=commitdiff_plain;h=cb027f82e1f4375e6ca1080cf93cc0a480defe54;p=bertos.git

msg_peek(): New function.


git-svn-id: https://src.develer.com/svnoss/bertos/trunk@241 38d2e660-2303-0410-9eaa-f027e97ec537
---

diff --git a/kern/msg.h b/kern/msg.h
index d9b06707..dbd73e83 100755
--- a/kern/msg.h
+++ b/kern/msg.h
@@ -18,6 +18,9 @@
 
 /*#*
  *#* $Log$
+ *#* Revision 1.4  2004/10/19 08:22:09  bernie
+ *#* msg_peek(): New function.
+ *#*
  *#* Revision 1.3  2004/08/25 14:12:09  rasky
  *#* Aggiornato il comment block dei log RCS
  *#*
@@ -70,6 +73,15 @@ INLINE Msg* msg_get(MsgPort* port)
 	return (Msg*)REMHEAD(&port->queue);
 }
 
+/* Peek the first message in the queue of \a port, or NULL if the port is empty */
+INLINE Msg *msg_peek(MsgPort *port)
+{
+	if (ISLISTEMPTY(&port->queue))
+		return NULL;
+
+	return (Msg *)port->queue.head;
+}
+
 /*! Send back (reply) \a msg to its sender */
 INLINE void msg_reply(Msg* msg)
 {