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[RFC,v2,1/7] bitmap: Add bitmap_one_extend operation

Message ID 1434369088-15076-2-git-send-email-a.rigo@virtualopensystems.com
State New
Headers show

Commit Message

Alvise Rigo June 15, 2015, 11:51 a.m. UTC 
Suggested-by: Jani Kokkonen <jani.kokkonen@huawei.com>
Suggested-by: Claudio Fontana <claudio.fontana@huawei.com>
Signed-off-by: Alvise Rigo <a.rigo@virtualopensystems.com>
---
 include/qemu/bitmap.h | 9 +++++++++
 1 file changed, 9 insertions(+)
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Patch

diff --git a/include/qemu/bitmap.h b/include/qemu/bitmap.h
index 86dd9cd..c59e8e7 100644
--- a/include/qemu/bitmap.h
+++ b/include/qemu/bitmap.h
@@ -246,4 +246,13 @@  static inline unsigned long *bitmap_zero_extend(unsigned long *old,
     return new;
 }
 
+static inline unsigned long *bitmap_one_extend(unsigned long *old,
+                                               long old_nbits, long new_nbits)
+{
+    long new_len = BITS_TO_LONGS(new_nbits) * sizeof(unsigned long);
+    unsigned long *new = g_realloc(old, new_len);
+    bitmap_set(new, old_nbits, new_nbits - old_nbits);
+    return new;
+}
+
 #endif /* BITMAP_H */