From: Brian Paul <brianp@vmware.com>
Date: Wed, 4 Jan 2012 15:40:04 +0000 (-0700)
Subject: gallium: add STATIC_ASSERT macro
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=188aca34923d109323e0e1a882c69f2b422b5cae;p=mesa.git

gallium: add STATIC_ASSERT macro
---

diff --git a/src/gallium/include/pipe/p_compiler.h b/src/gallium/include/pipe/p_compiler.h
index 6ac36447638..1daa5abdb85 100644
--- a/src/gallium/include/pipe/p_compiler.h
+++ b/src/gallium/include/pipe/p_compiler.h
@@ -308,6 +308,17 @@ void _ReadWriteBarrier(void);
 #endif
 
 
+/**
+ * Static (compile-time) assertion.
+ * Basically, use COND to dimension an array.  If COND is false/zero the
+ * array size will be -1 and we'll get a compilation error.
+ */
+#define STATIC_ASSERT(COND) \
+   do { \
+      typedef int static_assertion_failed[(!!(COND))*2-1]; \
+   } while (0)
+
+
 #if defined(__cplusplus)
 }
 #endif