From: arighi <arighi@38d2e660-2303-0410-9eaa-f027e97ec537>
Date: Mon, 29 Mar 2010 14:11:21 +0000 (+0000)
Subject: introduce UNREACHABLE() macro.
X-Git-Tag: 2.5.0~607
X-Git-Url: https://codewiz.org/gitweb?a=commitdiff_plain;h=4daefac32ad5a2198f911584f1e5abea001d6062;p=bertos.git

introduce UNREACHABLE() macro.

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@3300 38d2e660-2303-0410-9eaa-f027e97ec537
---

diff --git a/bertos/cfg/compiler.h b/bertos/cfg/compiler.h
index 5cacf1dc..bd60c6e7 100644
--- a/bertos/cfg/compiler.h
+++ b/bertos/cfg/compiler.h
@@ -190,6 +190,10 @@
 		#define DEPRECATED  __attribute__((__deprecated__))
 	#endif
 
+	#if GNUC_PREREQ(4,5)
+		#define UNREACHABLE() __builtin_unreachable()
+	#endif
+
 	#ifndef __cplusplus
 		#define ASSERT_TYPE_EQUAL(var1, var2) \
 			STATIC_ASSERT(__builtin_types_compatible_p(typeof(var1), typeof(var2)))
@@ -323,6 +327,9 @@
 #define MEMORY_BARRIER         /* nothing */
 #warning No memory barrier defined for select compiler. If you use the kernel check it.
 #endif
+#ifndef UNREACHABLE
+#define UNREACHABLE() for (;;)
+#endif
 
 
 /* Misc definitions */