X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fbitmap.h;h=5b50c9cc4987aa3e840d62550e303888ce7770ba;hb=1e86ae6f51bcc91d2fa36e4154bc6e540251eaf8;hp=9c420eb64d23719ea8260ed7b6a737ff6108bec9;hpb=a14bc59fb8f27db193d74662dc9c5cb8237177ef;p=openvswitch

diff --git a/lib/bitmap.h b/lib/bitmap.h
index 9c420eb6..5b50c9cc 100644
--- a/lib/bitmap.h
+++ b/lib/bitmap.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008 Nicira Networks.
+ * Copyright (c) 2008, 2009 Nicira Networks.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -38,7 +38,8 @@ bitmap_bit__(size_t offset)
 static inline unsigned long *
 bitmap_allocate(size_t n_bits)
 {
-    return xcalloc(1, ROUND_UP(n_bits, BITMAP_ULONG_BITS));
+    size_t n_longs = DIV_ROUND_UP(n_bits, BITMAP_ULONG_BITS);
+    return xcalloc(sizeof(unsigned long int), n_longs);
 }
 
 static inline void
@@ -78,5 +79,10 @@ 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);
+
+#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 */