add COUNTOF()

1 files changed, 2 insertions, 0 deletions

diff --git a/wrmr.h b/wrmr.h
index 669cc0a..73ad380 100644
--- a/wrmr.h
+++ b/wrmr.h
@@ -66,4 +66,6 @@ typedef uintptr_t uptr;
 #	define TYPEOF(...) __typeof__(__VA_ARGS__)
 #endif
 
+#define COUNTOF(x) (sizeof(x) / sizeof(*(x)))
+
 #endif