This makes a deep copy of an HBitmap.
Signed-off-by: Fam Zheng <f...@redhat.com>
---
include/qemu/hbitmap.h | 8 ++++++++
util/hbitmap.c | 16 ++++++++++++++++
2 files changed, 24 insertions(+)
diff --git a/include/qemu/hbitmap.h b/include/qemu/hbitmap.h
index 550d7ce..b645cfc 100644
--- a/include/qemu/hbitmap.h
+++ b/include/qemu/hbitmap.h
@@ -65,6 +65,14 @@ struct HBitmapIter {
HBitmap *hbitmap_alloc(uint64_t size, int granularity);
/**
+ * hbitmap_copy:
+ * @bitmap: The original bitmap to copy.
+ *
+ * Copy a HBitmap.
+ */
+HBitmap *hbitmap_copy(const HBitmap *bitmap);
+
+/**
* hbitmap_empty:
* @hb: HBitmap to operate on.
*
diff --git a/util/hbitmap.c b/util/hbitmap.c
index b3060e6..78d449e 100644
--- a/util/hbitmap.c
+++ b/util/hbitmap.c
@@ -395,3 +395,19 @@ HBitmap *hbitmap_alloc(uint64_t size, int granularity)
hb->levels[0][0] |= 1UL << (BITS_PER_LONG - 1);
return hb;
}
+
+HBitmap *hbitmap_copy(const HBitmap *bitmap)
+{
+ int i;
+ int64_t size;
+ HBitmap *hb = g_memdup(bitmap, sizeof(struct HBitmap));
+
+ size = bitmap->size;
+ for (i = HBITMAP_LEVELS; i-- > 0; ) {
+ size = MAX((size + BITS_PER_LONG - 1) >> BITS_PER_LEVEL, 1);
+ hb->levels[i] = g_memdup(bitmap->levels[i],
+ size * sizeof(unsigned long));
+ }
+
+ return hb;
+}
--
1.9.3
