[Qemu-devel] [6523] Add qemu_iovec_reset() (Avi Kivity)

[Qemu-devel] [6523] Add qemu_iovec_reset() (Avi Kivity)

[Anthony Liguori]

Revision: 6523
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=6523
Author:   aliguori
Date:     2009-02-05 21:23:54 +0000 (Thu, 05 Feb 2009)

Log Message:
-----------
Add qemu_iovec_reset() (Avi Kivity)

Add a helper to zero out an existing iovec.  Removes the need to deallocate
and reallocate it.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

Modified Paths:
--------------
    trunk/cutils.c
    trunk/qemu-common.h

Modified: trunk/cutils.c
===================================================================
--- trunk/cutils.c	2009-02-05 21:23:50 UTC (rev 6522)
+++ trunk/cutils.c	2009-02-05 21:23:54 UTC (rev 6523)
@@ -129,6 +129,12 @@
     qemu_free(qiov->iov);
 }
 
+void qemu_iovec_reset(QEMUIOVector *qiov)
+{
+    qiov->niov = 0;
+    qiov->size = 0;
+}
+
 void qemu_iovec_to_buffer(QEMUIOVector *qiov, void *buf)
 {
     uint8_t *p = (uint8_t *)buf;

Modified: trunk/qemu-common.h
===================================================================
--- trunk/qemu-common.h	2009-02-05 21:23:50 UTC (rev 6522)
+++ trunk/qemu-common.h	2009-02-05 21:23:54 UTC (rev 6523)
@@ -201,6 +201,7 @@
 void qemu_iovec_init(QEMUIOVector *qiov, int alloc_hint);
 void qemu_iovec_add(QEMUIOVector *qiov, void *base, size_t len);
 void qemu_iovec_destroy(QEMUIOVector *qiov);
+void qemu_iovec_reset(QEMUIOVector *qiov);
 void qemu_iovec_to_buffer(QEMUIOVector *qiov, void *buf);
 void qemu_iovec_from_buffer(QEMUIOVector *qiov, const void *buf, size_t count);