From ead816e515683271665551037ee6ce431a880b61 Mon Sep 17 00:00:00 2001
From: Ran Benita <ran234@gmail.com>
Date: Sat, 9 Aug 2014 22:35:24 +0300
Subject: utils: add a STATIC_ASSERT macro

It'd be nicer to use C11's static_assert(), but it's easier to roll our
own C99 version using a trick I saw in xv6.

Signed-off-by: Ran Benita <ran234@gmail.com>
---
 src/utils.h | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src/utils.h')

diff --git a/src/utils.h b/src/utils.h
index 51d690e..508435d 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -40,6 +40,10 @@
  */
 #define UNCONSTIFY(const_ptr)  ((void *) (uintptr_t) (const_ptr))
 
+#define STATIC_ASSERT(expr, message) do { \
+    switch (0) { case 0: case (expr): ; } \
+} while (0)
+
 static inline bool
 streq(const char *s1, const char *s2)
 {
-- 
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