src/gallium/auxiliary/pipebuffer/pb_buffer_malloc.c

   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
  43 struct malloc_buffer
  44 {
  45    struct pb_buffer base;
  46    void *data;
  47 };
  48
  49
  50 extern const struct pb_vtbl malloc_buffer_vtbl;
  51
  52 static INLINE struct malloc_buffer *
  53 malloc_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
  63 static void
  64 malloc_buffer_destroy(struct pb_buffer *buf)
  65 {
  66    align_free(malloc_buffer(buf)->data);
  67    FREE(buf);
  68 }
  69
  70
  71 static void *
  72 malloc_buffer_map(struct pb_buffer *buf,
  73                   unsigned flags,
  74                   void *flush_ctx)
  75 {
  76    return malloc_buffer(buf)->data;
  77 }
  78
  79
  80 static void
  81 malloc_buffer_unmap(struct pb_buffer *buf)
  82 {
  83    /* No-op */
  84 }
  85
  86
  87 static enum pipe_error
  88 malloc_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
  97 static void
  98 malloc_buffer_fence(struct pb_buffer *buf,
  99                     struct pipe_fence_handle *fence)
 100 {
 101    assert(0);
 102 }
 103
 104
 105 static void
 106 malloc_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
 115 const struct pb_vtbl
 116 malloc_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
 126 struct pb_buffer *
 127 pb_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.base.reference, 1);
 139    buf->base.base.usage = desc->usage;
 140    buf->base.base.size = size;
 141    buf->base.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
 154 static struct pb_buffer *
 155 pb_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
 163 static void
 164 pb_malloc_bufmgr_flush(struct pb_manager *mgr)
 165 {
 166    /* No-op */
 167 }
 168
 169
 170 static void
 171 pb_malloc_bufmgr_destroy(struct pb_manager *mgr)
 172 {
 173    /* No-op */
 174 }
 175
 176
 177 static boolean
 178 pb_malloc_bufmgr_is_buffer_busy( struct pb_manager *mgr,
 179                                  struct pb_buffer *buf )
 180 {
 181    return FALSE;
 182 }
 183
 184
 185 static struct pb_manager
 186 pb_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
 194 struct pb_manager *
 195 pb_malloc_bufmgr_create(void)
 196 {
 197   return &pb_malloc_bufmgr;
 198 }