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/**************************************************************************
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 *
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 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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 * All Rights Reserved.
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a
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 * copy of this software and associated documentation files (the
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 * "Software"), to deal in the Software without restriction, including
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 * without limitation the rights to use, copy, modify, merge, publish,
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 * distribute, sub license, and/or sell copies of the Software, and to
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 * permit persons to whom the Software is furnished to do so, subject to
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 * the following conditions:
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 *
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 * The above copyright notice and this permission notice (including the
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 * next paragraph) shall be included in all copies or substantial portions
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 * of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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 *
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 **************************************************************************/
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/**
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 * \file
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 * Implementation of malloc-based buffers to store data that can't be processed
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 * by the hardware.
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 *
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 * \author Jose Fonseca
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 */
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#include "util/u_debug.h"
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#include "util/u_memory.h"
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#include "pb_buffer.h"
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#include "pb_bufmgr.h"
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struct malloc_buffer
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{
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   struct pb_buffer base;
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   void *data;
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};
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extern const struct pb_vtbl malloc_buffer_vtbl;
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static INLINE struct malloc_buffer *
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malloc_buffer(struct pb_buffer *buf)
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{
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   assert(buf);
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   if (!buf)
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      return NULL;
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   assert(buf->vtbl == &malloc_buffer_vtbl);
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   return (struct malloc_buffer *)buf;
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}
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static void
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malloc_buffer_destroy(struct pb_buffer *buf)
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{
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   align_free(malloc_buffer(buf)->data);
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   FREE(buf);
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}
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static void *
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malloc_buffer_map(struct pb_buffer *buf,
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                  unsigned flags,
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		  void *flush_ctx)
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{
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   return malloc_buffer(buf)->data;
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}
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static void
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malloc_buffer_unmap(struct pb_buffer *buf)
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{
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   /* No-op */
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}
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static enum pipe_error
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malloc_buffer_validate(struct pb_buffer *buf,
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                       struct pb_validate *vl,
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                       unsigned flags)
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{
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   assert(0);
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   return PIPE_ERROR;
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}
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static void
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malloc_buffer_fence(struct pb_buffer *buf,
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                    struct pipe_fence_handle *fence)
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{
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   assert(0);
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}
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static void
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malloc_buffer_get_base_buffer(struct pb_buffer *buf,
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                              struct pb_buffer **base_buf,
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                              pb_size *offset)
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{
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   *base_buf = buf;
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   *offset = 0;
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}
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const struct pb_vtbl
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malloc_buffer_vtbl = {
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      malloc_buffer_destroy,
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      malloc_buffer_map,
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      malloc_buffer_unmap,
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      malloc_buffer_validate,
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      malloc_buffer_fence,
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      malloc_buffer_get_base_buffer
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};
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struct pb_buffer *
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pb_malloc_buffer_create(pb_size size,
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                   	const struct pb_desc *desc)
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{
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   struct malloc_buffer *buf;
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   /* TODO: do a single allocation */
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   buf = CALLOC_STRUCT(malloc_buffer);
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   if(!buf)
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      return NULL;
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   pipe_reference_init(&buf->base.reference, 1);
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   buf->base.usage = desc->usage;
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   buf->base.size = size;
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   buf->base.alignment = desc->alignment;
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   buf->base.vtbl = &malloc_buffer_vtbl;
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   buf->data = align_malloc(size, desc->alignment < sizeof(void*) ? sizeof(void*) : desc->alignment);
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   if(!buf->data) {
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      FREE(buf);
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      return NULL;
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   }
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   return &buf->base;
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}
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static struct pb_buffer *
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pb_malloc_bufmgr_create_buffer(struct pb_manager *mgr,
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                               pb_size size,
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                               const struct pb_desc *desc)
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{
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   return pb_malloc_buffer_create(size, desc);
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}
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static void
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pb_malloc_bufmgr_flush(struct pb_manager *mgr)
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{
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   /* No-op */
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}
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static void
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pb_malloc_bufmgr_destroy(struct pb_manager *mgr)
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{
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   /* No-op */
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}
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static boolean
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pb_malloc_bufmgr_is_buffer_busy( struct pb_manager *mgr,
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                                 struct pb_buffer *buf )
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{
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   return FALSE;
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}
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static struct pb_manager
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pb_malloc_bufmgr = {
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   pb_malloc_bufmgr_destroy,
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   pb_malloc_bufmgr_create_buffer,
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   pb_malloc_bufmgr_flush,
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   pb_malloc_bufmgr_is_buffer_busy
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};
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struct pb_manager *
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pb_malloc_bufmgr_create(void)
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{
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  return &pb_malloc_bufmgr;
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}