1/**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28/**
29 * \file
30 * Implementation of malloc-based buffers to store data that can't be processed
31 * by the hardware.
32 *
33 * \author Jose Fonseca <jrfonseca@tungstengraphics.com>
34 */
35
36
37#include "util/u_debug.h"
38#include "util/u_memory.h"
39#include "pb_buffer.h"
40#include "pb_bufmgr.h"
41
42
43struct malloc_buffer
44{
45   struct pb_buffer base;
46   void *data;
47};
48
49
50extern const struct pb_vtbl malloc_buffer_vtbl;
51
52static INLINE struct malloc_buffer *
53malloc_buffer(struct pb_buffer *buf)
54{
55   assert(buf);
56   if (!buf)
57      return NULL;
58   assert(buf->vtbl == &malloc_buffer_vtbl);
59   return (struct malloc_buffer *)buf;
60}
61
62
63static void
64malloc_buffer_destroy(struct pb_buffer *buf)
65{
66   align_free(malloc_buffer(buf)->data);
67   FREE(buf);
68}
69
70
71static void *
72malloc_buffer_map(struct pb_buffer *buf,
73                  unsigned flags,
74		  void *flush_ctx)
75{
76   return malloc_buffer(buf)->data;
77}
78
79
80static void
81malloc_buffer_unmap(struct pb_buffer *buf)
82{
83   /* No-op */
84}
85
86
87static enum pipe_error
88malloc_buffer_validate(struct pb_buffer *buf,
89                       struct pb_validate *vl,
90                       unsigned flags)
91{
92   assert(0);
93   return PIPE_ERROR;
94}
95
96
97static void
98malloc_buffer_fence(struct pb_buffer *buf,
99                    struct pipe_fence_handle *fence)
100{
101   assert(0);
102}
103
104
105static void
106malloc_buffer_get_base_buffer(struct pb_buffer *buf,
107                              struct pb_buffer **base_buf,
108                              pb_size *offset)
109{
110   *base_buf = buf;
111   *offset = 0;
112}
113
114
115const struct pb_vtbl
116malloc_buffer_vtbl = {
117      malloc_buffer_destroy,
118      malloc_buffer_map,
119      malloc_buffer_unmap,
120      malloc_buffer_validate,
121      malloc_buffer_fence,
122      malloc_buffer_get_base_buffer
123};
124
125
126struct pb_buffer *
127pb_malloc_buffer_create(pb_size size,
128                   	const struct pb_desc *desc)
129{
130   struct malloc_buffer *buf;
131
132   /* TODO: do a single allocation */
133
134   buf = CALLOC_STRUCT(malloc_buffer);
135   if(!buf)
136      return NULL;
137
138   pipe_reference_init(&buf->base.reference, 1);
139   buf->base.usage = desc->usage;
140   buf->base.size = size;
141   buf->base.alignment = desc->alignment;
142   buf->base.vtbl = &malloc_buffer_vtbl;
143
144   buf->data = align_malloc(size, desc->alignment < sizeof(void*) ? sizeof(void*) : desc->alignment);
145   if(!buf->data) {
146      FREE(buf);
147      return NULL;
148   }
149
150   return &buf->base;
151}
152
153
154static struct pb_buffer *
155pb_malloc_bufmgr_create_buffer(struct pb_manager *mgr,
156                               pb_size size,
157                               const struct pb_desc *desc)
158{
159   return pb_malloc_buffer_create(size, desc);
160}
161
162
163static void
164pb_malloc_bufmgr_flush(struct pb_manager *mgr)
165{
166   /* No-op */
167}
168
169
170static void
171pb_malloc_bufmgr_destroy(struct pb_manager *mgr)
172{
173   /* No-op */
174}
175
176
177static boolean
178pb_malloc_bufmgr_is_buffer_busy( struct pb_manager *mgr,
179                                 struct pb_buffer *buf )
180{
181   return FALSE;
182}
183
184
185static struct pb_manager
186pb_malloc_bufmgr = {
187   pb_malloc_bufmgr_destroy,
188   pb_malloc_bufmgr_create_buffer,
189   pb_malloc_bufmgr_flush,
190   pb_malloc_bufmgr_is_buffer_busy
191};
192
193
194struct pb_manager *
195pb_malloc_bufmgr_create(void)
196{
197  return &pb_malloc_bufmgr;
198}
199