os: Make streams abstract.

Also replace windows kernel stream with null implementation. It was
severely limited and no easy means to test it now.

1 files changed, 72 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/os/os_stream_null.c b/src/gallium/auxiliary/os/os_stream_null.c
new file mode 100644
index 0000000000..b55ce9c926
--- /dev/null
+++ b/src/gallium/auxiliary/os/os_stream_null.c
@@ -0,0 +1,72 @@
+/**************************************************************************
+ *
+ * Copyright 2008-2010 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+/**
+ * @file
+ * Stream implementation for the Windows Display driver.
+ */
+
+#include "os_memory.h"
+#include "os_stream.h"
+
+
+static void
+os_null_stream_close(struct os_stream *stream)
+{
+   (void)stream;
+}
+
+
+static boolean
+os_null_stream_write(struct os_stream *stream, const void *data, size_t size)
+{
+   (void)data;
+   (void)size;
+   return TRUE;
+}
+
+
+static void
+os_null_stream_flush(struct os_stream *stream)
+{
+   (void)stream;
+}
+
+
+static struct os_stream
+os_null_stream = {
+   &os_null_stream_close,
+   &os_null_stream_write,
+   &os_null_stream_flush
+};
+
+
+struct os_stream *
+os_null_stream_create()
+{
+   return &os_null_stream;
+}