X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Fbitmap.h;h=5e6f8ed0cc1b13373b067fe208a11b7379cdcdba;hb=4b0424809b823101c969a0691fc1db0c880ae64a;hp=9c420eb64d23719ea8260ed7b6a737ff6108bec9;hpb=34e63086edddcae06d7c1a4fa84fec0861e50758;p=sliver-openvswitch.git

diff --git a/lib/bitmap.h b/lib/bitmap.h
index 9c420eb64..5e6f8ed0c 100644
--- a/lib/bitmap.h
+++ b/lib/bitmap.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -26,7 +26,7 @@
 static inline unsigned long *
 bitmap_unit__(const unsigned long *bitmap, size_t offset)
 {
-    return (unsigned long *) &bitmap[offset / BITMAP_ULONG_BITS];
+    return CONST_CAST(unsigned long *, &bitmap[offset / BITMAP_ULONG_BITS]);
 }
 
 static inline unsigned long
@@ -35,10 +35,32 @@ bitmap_bit__(size_t offset)
     return 1UL << (offset % BITMAP_ULONG_BITS);
 }
 
+#define BITMAP_N_LONGS(N_BITS) DIV_ROUND_UP(N_BITS, BITMAP_ULONG_BITS)
+
+static inline size_t
+bitmap_n_longs(size_t n_bits)
+{
+    return BITMAP_N_LONGS(n_bits);
+}
+
+static inline size_t
+bitmap_n_bytes(size_t n_bits)
+{
+    return bitmap_n_longs(n_bits) * sizeof(unsigned long int);
+}
+
 static inline unsigned long *
 bitmap_allocate(size_t n_bits)
 {
-    return xcalloc(1, ROUND_UP(n_bits, BITMAP_ULONG_BITS));
+    return xzalloc(bitmap_n_bytes(n_bits));
+}
+
+unsigned long *bitmap_allocate1(size_t n_bits);
+
+static inline unsigned long *
+bitmap_clone(const unsigned long *bitmap, size_t n_bits)
+{
+    return xmemdup(bitmap, bitmap_n_bytes(n_bits));
 }
 
 static inline void
@@ -78,5 +100,11 @@ bitmap_set(unsigned long *bitmap, size_t offset, bool value)
 void bitmap_set_multiple(unsigned long *, size_t start, size_t count,
                          bool value);
 bool bitmap_equal(const unsigned long *, const unsigned long *, size_t n);
+size_t bitmap_scan(const unsigned long int *, size_t start, size_t end);
+size_t bitmap_count1(const unsigned long *, size_t n);
+
+#define BITMAP_FOR_EACH_1(IDX, SIZE, BITMAP) \
+    for ((IDX) = bitmap_scan(BITMAP, 0, SIZE); (IDX) < (SIZE); \
+         (IDX) = bitmap_scan(BITMAP, (IDX) + 1, SIZE))
 
 #endif /* bitmap.h */