From 9ebd84480583bb6d9a7666c079d99ff3266c423d Mon Sep 17 00:00:00 2001
From: Max Reitz <mreitz@redhat.com>
Date: Wed, 22 Oct 2014 14:09:27 +0200
Subject: block: Add qemu_{,try_}blockalign0()
These functions call their non-0-counterparts and then fill the
allocated buffer with 0 (if the allocation has been successful).
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
block.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
(limited to 'block.c')
diff --git a/block.c b/block.c
index 773e87e..bbb04e7 100644
--- a/block.c
+++ b/block.c
@@ -5200,6 +5200,11 @@ void *qemu_blockalign(BlockDriverState *bs, size_t size)
return qemu_memalign(bdrv_opt_mem_align(bs), size);
}
+void *qemu_blockalign0(BlockDriverState *bs, size_t size)
+{
+ return memset(qemu_blockalign(bs, size), 0, size);
+}
+
void *qemu_try_blockalign(BlockDriverState *bs, size_t size)
{
size_t align = bdrv_opt_mem_align(bs);
@@ -5213,6 +5218,17 @@ void *qemu_try_blockalign(BlockDriverState *bs, size_t size)
return qemu_try_memalign(align, size);
}
+void *qemu_try_blockalign0(BlockDriverState *bs, size_t size)
+{
+ void *mem = qemu_try_blockalign(bs, size);
+
+ if (mem) {
+ memset(mem, 0, size);
+ }
+
+ return mem;
+}
+
/*
* Check if all memory in this vector is sector aligned.
*/
--
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