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[18/39] bitmap: Add bitmap_zero_extend operation

Message ID 1383743088-8139-19-git-send-email-quintela@redhat.com
State New
Headers show

Commit Message

Juan Quintela Nov. 6, 2013, 1:04 p.m. UTC 
Signed-off-by: Juan Quintela <quintela@redhat.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 308bbb7..53f5f1f 100644
--- a/include/qemu/bitmap.h
+++ b/include/qemu/bitmap.h
@@ -219,4 +219,13 @@  unsigned long bitmap_find_next_zero_area(unsigned long *map,
 					 unsigned int nr,
 					 unsigned long align_mask);

+static inline unsigned long *bitmap_zero_extend(unsigned long *old,
+                                                int old_nbits, int new_nbits)
+{
+    int new_len = BITS_TO_LONGS(new_nbits) * sizeof(unsigned long);
+    unsigned long *new = g_realloc(old, new_len);
+    bitmap_clear(new, old_nbits, new_nbits - old_nbits);
+    return new;
+}
+
 #endif /* BITMAP_H */