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utils: add a STATIC_ASSERT macro
author
Ran Benita
<ran234@gmail.com>
Sat, 9 Aug 2014 19:35:24 +0000
(22:35 +0300)
committer
Ran Benita
<ran234@gmail.com>
Sat, 9 Aug 2014 19:42:45 +0000
(22:42 +0300)
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
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diff --git
a/src/utils.h
b/src/utils.h
index
51d690e
..
508435d
100644
(file)
--- 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)
{