1 files changed, 12 insertions, 0 deletions
diff --git a/common.h b/common.h
new file mode 100644
index 0000000..aed2a99
--- /dev/null
+++ b/common.h
@@ -0,0 +1,12 @@
+#ifndef _COMMON_H
+#define _COMMON_H
+
+#define __round_mask(x, y) ((__typeof__(x))((y)-1))
+#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+#define min(x, y) ((x) > (y) ? (y) : (x))
+#define max(x, y) ((x) > (y) ? (x) : (y))
+
+#endif