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-rw-r--r--src/gallium/auxiliary/pipebuffer/pb_buffer_malloc.c186
1 files changed, 186 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/pipebuffer/pb_buffer_malloc.c b/src/gallium/auxiliary/pipebuffer/pb_buffer_malloc.c
new file mode 100644
index 0000000000..53f497cfb0
--- /dev/null
+++ b/src/gallium/auxiliary/pipebuffer/pb_buffer_malloc.c
@@ -0,0 +1,186 @@
+/**************************************************************************
+ *
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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 TUNGSTEN GRAPHICS 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
+ * Implementation of malloc-based buffers to store data that can't be processed
+ * by the hardware.
+ *
+ * \author Jose Fonseca <jrfonseca@tungstengraphics.com>
+ */
+
+
+#include "pipe/p_debug.h"
+#include "util/u_memory.h"
+#include "pb_buffer.h"
+#include "pb_bufmgr.h"
+
+
+struct malloc_buffer
+{
+ struct pb_buffer base;
+ void *data;
+};
+
+
+extern const struct pb_vtbl malloc_buffer_vtbl;
+
+static INLINE struct malloc_buffer *
+malloc_buffer(struct pb_buffer *buf)
+{
+ assert(buf);
+ assert(buf->vtbl == &malloc_buffer_vtbl);
+ return (struct malloc_buffer *)buf;
+}
+
+
+static void
+malloc_buffer_destroy(struct pb_buffer *buf)
+{
+ align_free(malloc_buffer(buf)->data);
+ FREE(buf);
+}
+
+
+static void *
+malloc_buffer_map(struct pb_buffer *buf,
+ unsigned flags)
+{
+ return malloc_buffer(buf)->data;
+}
+
+
+static void
+malloc_buffer_unmap(struct pb_buffer *buf)
+{
+ /* No-op */
+}
+
+
+static enum pipe_error
+malloc_buffer_validate(struct pb_buffer *buf,
+ struct pb_validate *vl,
+ unsigned flags)
+{
+ assert(0);
+ return PIPE_ERROR;
+}
+
+
+static void
+malloc_buffer_fence(struct pb_buffer *buf,
+ struct pipe_fence_handle *fence)
+{
+ assert(0);
+}
+
+
+static void
+malloc_buffer_get_base_buffer(struct pb_buffer *buf,
+ struct pb_buffer **base_buf,
+ unsigned *offset)
+{
+ *base_buf = buf;
+ *offset = 0;
+}
+
+
+const struct pb_vtbl
+malloc_buffer_vtbl = {
+ malloc_buffer_destroy,
+ malloc_buffer_map,
+ malloc_buffer_unmap,
+ malloc_buffer_validate,
+ malloc_buffer_fence,
+ malloc_buffer_get_base_buffer
+};
+
+
+struct pb_buffer *
+pb_malloc_buffer_create(size_t size,
+ const struct pb_desc *desc)
+{
+ struct malloc_buffer *buf;
+
+ /* TODO: do a single allocation */
+
+ buf = CALLOC_STRUCT(malloc_buffer);
+ if(!buf)
+ return NULL;
+
+ buf->base.base.refcount = 1;
+ buf->base.base.alignment = desc->alignment;
+ buf->base.base.usage = desc->usage;
+ buf->base.base.size = size;
+ buf->base.vtbl = &malloc_buffer_vtbl;
+
+ buf->data = align_malloc(size, desc->alignment < sizeof(void*) ? sizeof(void*) : desc->alignment);
+ if(!buf->data) {
+ FREE(buf);
+ return NULL;
+ }
+
+ return &buf->base;
+}
+
+
+static struct pb_buffer *
+pb_malloc_bufmgr_create_buffer(struct pb_manager *mgr,
+ size_t size,
+ const struct pb_desc *desc)
+{
+ return pb_malloc_buffer_create(size, desc);
+}
+
+
+static void
+pb_malloc_bufmgr_flush(struct pb_manager *mgr)
+{
+ /* No-op */
+}
+
+
+static void
+pb_malloc_bufmgr_destroy(struct pb_manager *mgr)
+{
+ /* No-op */
+}
+
+
+static struct pb_manager
+pb_malloc_bufmgr = {
+ pb_malloc_bufmgr_destroy,
+ pb_malloc_bufmgr_create_buffer,
+ pb_malloc_bufmgr_flush
+};
+
+
+struct pb_manager *
+pb_malloc_bufmgr_create(void)
+{
+ return &pb_malloc_bufmgr;
+}