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[Qemu-devel] [PULL 03/20] buffer: add buffer_move_empty
From: |
Gerd Hoffmann |
Subject: |
[Qemu-devel] [PULL 03/20] buffer: add buffer_move_empty |
Date: |
Mon, 16 Nov 2015 18:25:18 +0100 |
Signed-off-by: Gerd Hoffmann <address@hidden>
Reviewed-by: Peter Lieven <address@hidden>
Reviewed-by: Daniel Berrange <address@hidden>
Message-id: address@hidden
---
include/qemu/buffer.h | 10 ++++++++++
util/buffer.c | 14 ++++++++++++++
2 files changed, 24 insertions(+)
diff --git a/include/qemu/buffer.h b/include/qemu/buffer.h
index 0710e16..f53ee9e 100644
--- a/include/qemu/buffer.h
+++ b/include/qemu/buffer.h
@@ -127,4 +127,14 @@ uint8_t *buffer_end(Buffer *buffer);
*/
gboolean buffer_empty(Buffer *buffer);
+/**
+ * buffer_move_empty:
+ * @to: destination buffer object
+ * @from: source buffer object
+ *
+ * Moves buffer, without copying data. 'to' buffer must be empty.
+ * 'from' buffer is empty and zero-sized on return.
+ */
+void buffer_move_empty(Buffer *to, Buffer *from);
+
#endif /* QEMU_BUFFER_H__ */
diff --git a/util/buffer.c b/util/buffer.c
index 12bf2d7..c7a39ec 100644
--- a/util/buffer.c
+++ b/util/buffer.c
@@ -77,3 +77,17 @@ void buffer_advance(Buffer *buffer, size_t len)
(buffer->offset - len));
buffer->offset -= len;
}
+
+void buffer_move_empty(Buffer *to, Buffer *from)
+{
+ assert(to->offset == 0);
+
+ g_free(to->buffer);
+ to->offset = from->offset;
+ to->capacity = from->capacity;
+ to->buffer = from->buffer;
+
+ from->offset = 0;
+ from->capacity = 0;
+ from->buffer = NULL;
+}
--
1.8.3.1
- [Qemu-devel] [PULL 09/20] vnc-jobs: move buffer reset, use new buffer move, (continued)
- [Qemu-devel] [PULL 09/20] vnc-jobs: move buffer reset, use new buffer move, Gerd Hoffmann, 2015/11/16
- [Qemu-devel] [PULL 04/20] buffer: add buffer_move, Gerd Hoffmann, 2015/11/16
- [Qemu-devel] [PULL 10/20] vnc: zap dead code, Gerd Hoffmann, 2015/11/16
- [Qemu-devel] [PULL 06/20] buffer: add tracing, Gerd Hoffmann, 2015/11/16
- [Qemu-devel] [PULL 08/20] vnc: kill jobs queue buffer, Gerd Hoffmann, 2015/11/16
- [Qemu-devel] [PULL 02/20] buffer: add buffer_init, Gerd Hoffmann, 2015/11/16
- [Qemu-devel] [PULL 18/20] buffer: factor out buffer_adj_size, Gerd Hoffmann, 2015/11/16
- [Qemu-devel] [PULL 16/20] vnc: recycle empty vs->output buffer, Gerd Hoffmann, 2015/11/16
- [Qemu-devel] [PULL 19/20] buffer: allow a buffer to shrink gracefully, Gerd Hoffmann, 2015/11/16
- [Qemu-devel] [PULL 11/20] vnc: add vnc_width+vnc_height helpers, Gerd Hoffmann, 2015/11/16
- [Qemu-devel] [PULL 03/20] buffer: add buffer_move_empty,
Gerd Hoffmann <=
- [Qemu-devel] [PULL 14/20] vnc: only alloc server surface with clients connected, Gerd Hoffmann, 2015/11/16
- [Qemu-devel] [PULL 05/20] buffer: add buffer_shrink, Gerd Hoffmann, 2015/11/16
- [Qemu-devel] [PULL 20/20] vnc: fix mismerge, Gerd Hoffmann, 2015/11/16
- [Qemu-devel] [PULL 07/20] vnc: attach names to buffers, Gerd Hoffmann, 2015/11/16
- [Qemu-devel] [PULL 17/20] buffer: factor out buffer_req_size, Gerd Hoffmann, 2015/11/16
- [Qemu-devel] [PULL 12/20] vnc: factor out vnc_update_server_surface, Gerd Hoffmann, 2015/11/16
- [Qemu-devel] [PULL 15/20] vnc: fix local state init, Gerd Hoffmann, 2015/11/16
- Re: [Qemu-devel] [PULL for-2.5 00/20] vnc: buffer code improvements, bugfixes., Peter Maydell, 2015/11/17