[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [6902] add qemu_iovec_init_external (Christoph Hellwig)
From: |
Anthony Liguori |
Subject: |
[Qemu-devel] [6902] add qemu_iovec_init_external (Christoph Hellwig) |
Date: |
Sat, 28 Mar 2009 17:46:10 +0000 |
Revision: 6902
http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=6902
Author: aliguori
Date: 2009-03-28 17:46:10 +0000 (Sat, 28 Mar 2009)
Log Message:
-----------
add qemu_iovec_init_external (Christoph Hellwig)
Allow to initialize a QEMUIOVector from an externally allocated iovec.
qiov->nalloc is initialized to -1 to indicate external storage for qiov->iov
and all functions dealing with memory management assert on the iovec beeing
an internally managed first.
Signed-off-by: Christoph Hellwig <address@hidden>
Signed-off-by: Anthony Liguori <address@hidden>
Modified Paths:
--------------
trunk/cutils.c
trunk/qemu-common.h
Modified: trunk/cutils.c
===================================================================
--- trunk/cutils.c 2009-03-28 17:29:07 UTC (rev 6901)
+++ trunk/cutils.c 2009-03-28 17:46:10 UTC (rev 6902)
@@ -23,6 +23,7 @@
*/
#include "qemu-common.h"
#include "host-utils.h"
+#include <assert.h>
void pstrcpy(char *buf, int buf_size, const char *str)
{
@@ -112,8 +113,22 @@
qiov->size = 0;
}
+void qemu_iovec_init_external(QEMUIOVector *qiov, struct iovec *iov, int niov)
+{
+ int i;
+
+ qiov->iov = iov;
+ qiov->niov = niov;
+ qiov->nalloc = -1;
+ qiov->size = 0;
+ for (i = 0; i < niov; i++)
+ qiov->size += iov[i].iov_len;
+}
+
void qemu_iovec_add(QEMUIOVector *qiov, void *base, size_t len)
{
+ assert(qiov->nalloc != -1);
+
if (qiov->niov == qiov->nalloc) {
qiov->nalloc = 2 * qiov->nalloc + 1;
qiov->iov = qemu_realloc(qiov->iov, qiov->nalloc * sizeof(struct
iovec));
@@ -126,11 +141,15 @@
void qemu_iovec_destroy(QEMUIOVector *qiov)
{
+ assert(qiov->nalloc != -1);
+
qemu_free(qiov->iov);
}
void qemu_iovec_reset(QEMUIOVector *qiov)
{
+ assert(qiov->nalloc != -1);
+
qiov->niov = 0;
qiov->size = 0;
}
Modified: trunk/qemu-common.h
===================================================================
--- trunk/qemu-common.h 2009-03-28 17:29:07 UTC (rev 6901)
+++ trunk/qemu-common.h 2009-03-28 17:46:10 UTC (rev 6902)
@@ -194,6 +194,7 @@
} QEMUIOVector;
void qemu_iovec_init(QEMUIOVector *qiov, int alloc_hint);
+void qemu_iovec_init_external(QEMUIOVector *qiov, struct iovec *iov, int niov);
void qemu_iovec_add(QEMUIOVector *qiov, void *base, size_t len);
void qemu_iovec_destroy(QEMUIOVector *qiov);
void qemu_iovec_reset(QEMUIOVector *qiov);
[Prev in Thread] |
Current Thread |
[Next in Thread] |
- [Qemu-devel] [6902] add qemu_iovec_init_external (Christoph Hellwig),
Anthony Liguori <=