X-Git-Url: https://wimlib.net/git/?a=blobdiff_plain;f=src%2Futil.h;h=28935938871e9542132727fc727b5ebd1993284e;hb=034fd063f956d0806e557680a36a69a42556a776;hp=3dfd6030be08574686a3cbb6b1d8c790775746dc;hpb=9b25b1a8e4c01e57f2872fe9e825f0dc81329008;p=wimlib

diff --git a/src/util.h b/src/util.h
index 3dfd6030..28935938 100644
--- a/src/util.h
+++ b/src/util.h
@@ -30,27 +30,15 @@
 #	define HOT
 #endif /* __GNUC__ */
 
+
+#if 0
 #ifdef WITH_FUSE
-/* 
- * Compare-and-swap.  Equivalent to the folliwng, but executed
- * atomically:
- *
- * Q tmp = *ptr;
- * if (tmp == oval)
- * 	*ptr = nval;
- * return tmp;
- */
 #define atomic_inc(ptr) \
 	__sync_fetch_and_add(ptr, 1)
 
 #define atomic_dec(ptr) \
 	__sync_sub_and_fetch(ptr, 1)
-
-#define cas(ptr, oval, nval) \
-	__sync_val_compare_and_swap(ptr, oval, nval);
-
-#define cas_bool(ptr, oval, nval) \
-	__sync_bool_compare_and_swap(ptr, oval, nval);
+#endif
 #endif
 
 #ifndef _NTFS_TYPES_H
@@ -88,6 +76,12 @@ typedef unsigned uint;
 	(type *)( (char *)__mptr - offsetof(type,member) );})
 #endif
 
+#define DIV_ROUND_UP(numerator, denominator) \
+	(((numerator) + (denominator) - 1) / (denominator))
+
+#define MODULO_NONZERO(numerator, denominator) \
+	(((numerator) % (denominator)) ? ((numerator) % (denominator)) : (denominator))
+
 #define ARRAY_LEN(array) (sizeof(array) / sizeof((array)[0]))
 
 #define ZERO_ARRAY(array) memset(array, 0, sizeof(array))
@@ -195,5 +189,19 @@ static inline void print_byte_field(const u8 field[], size_t len)
 		printf("%02hhx", *field++);
 }
 
+static inline u32 bsr32(u32 n)
+{
+#if defined(__x86__) || defined(__x86_64__)
+	asm("bsrl %0, %0;"
+			: "=r"(n)
+			: "0" (n));
+	return n;
+#else
+	u32 pow = 0;
+	while ((n >>= 1) != 0)
+		pow++;
+	return pow;
+#endif
+}
 
 #endif /* _WIMLIB_UTIL_H */