[libvirt] [PATCH RFC 2/8] qemu: add VirBitmapDup
Add function to duplicate a virBitmap for returning
cached qemuCaps[Flags] from qemuCapsExtractVersionInfo
TODO: could factor the size calculation into a macro or inline
function as it's used by both Dup and Alloc.
---
src/libvirt_private.syms | 1 +
src/util/bitmap.c | 24 ++++++++++++++++++++++++
src/util/bitmap.h | 6 ++++++
3 files changed, 31 insertions(+)
Index: libvirt-0.9.10/src/util/bitmap.c
===================================================================
--- libvirt-0.9.10.orig/src/util/bitmap.c
+++ libvirt-0.9.10/src/util/bitmap.c
@@ -80,6 +80,30 @@ virBitmapPtr virBitmapAlloc(size_t size)
}
/**
+ * virBitmapDup:
+ * @sbm: source bitmap to duplicate
+ *
+ * Duplicate the source bitmap.
+ *
+ * Returns a pointer to the duplicated bitmap or NULL if
+ * memory cannot be allocated.
+ */
+virBitmapPtr virBitmapDup(virBitmapPtr sbm)
+{
+ virBitmapPtr bitmap;
+
+ bitmap = virBitmapAlloc(sbm->size);
+ if (bitmap) {
+ size_t sz = (sbm->size + VIR_BITMAP_BITS_PER_UNIT - 1) /
+ VIR_BITMAP_BITS_PER_UNIT;
+ int i;
+ for (i = 0; i < sz; ++i)
+ bitmap->map[i] = sbm->map[i];
+ }
+ return bitmap;
+}
+
+/**
* virBitmapFree:
* @bitmap: previously allocated bitmap
*
Index: libvirt-0.9.10/src/util/bitmap.h
===================================================================
--- libvirt-0.9.10.orig/src/util/bitmap.h
+++ libvirt-0.9.10/src/util/bitmap.h
@@ -37,6 +37,12 @@ typedef virBitmap *virBitmapPtr;
virBitmapPtr virBitmapAlloc(size_t size) ATTRIBUTE_RETURN_CHECK;
/*
+ * Duplicate the specified virBitmap
+ */
+virBitmapPtr virBitmapDup(virBitmapPtr src)
+ ATTRIBUTE_NONNULL(1) ATTRIBUTE_RETURN_CHECK;
+
+/*
* Free previously allocated bitmap
*/
void virBitmapFree(virBitmapPtr bitmap);
Index: libvirt-0.9.10/src/libvirt_private.syms
===================================================================
--- libvirt-0.9.10.orig/src/libvirt_private.syms
+++ libvirt-0.9.10/src/libvirt_private.syms
@@ -13,6 +13,7 @@ virRequestUsername;
# bitmap.h
virBitmapAlloc;
virBitmapClearBit;
+virBitmapDup;
virBitmapFree;
virBitmapGetBit;
virBitmapSetBit;