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    assert(buf->vtbl == &malloc_buffer_vtbl);
  57    return (struct malloc_buffer *)buf;
  58 }
  59
  60
  61 static void
  62 malloc_buffer_destroy(struct pb_buffer *buf)
  63 {
  64    align_free(malloc_buffer(buf)->data);
  65    FREE(buf);
  66 }
  67
  68
  69 static void *
  70 malloc_buffer_map(struct pb_buffer *buf,
  71                   unsigned flags)
  72 {
  73    return malloc_buffer(buf)->data;
  74 }
  75
  76
  77 static void
  78 malloc_buffer_unmap(struct pb_buffer *buf)
  79 {
  80    /* No-op */
  81 }
  82
  83
  84 static enum pipe_error
  85 malloc_buffer_validate(struct pb_buffer *buf,
  86                        struct pb_validate *vl,
  87                        unsigned flags)
  88 {
  89    assert(0);
  90    return PIPE_ERROR;
  91 }
  92
  93
  94 static void
  95 malloc_buffer_fence(struct pb_buffer *buf,
  96                     struct pipe_fence_handle *fence)
  97 {
  98    assert(0);
  99 }
 100
 101
 102 static void
 103 malloc_buffer_get_base_buffer(struct pb_buffer *buf,
 104                               struct pb_buffer **base_buf,
 105                               unsigned *offset)
 106 {
 107    *base_buf = buf;
 108    *offset = 0;
 109 }
 110
 111
 112 const struct pb_vtbl
 113 malloc_buffer_vtbl = {
 114       malloc_buffer_destroy,
 115       malloc_buffer_map,
 116       malloc_buffer_unmap,
 117       malloc_buffer_validate,
 118       malloc_buffer_fence,
 119       malloc_buffer_get_base_buffer
 120 };
 121
 122
 123 struct pb_buffer *
 124 pb_malloc_buffer_create(size_t size,
 125                         const struct pb_desc *desc)
 126 {
 127    struct malloc_buffer *buf;
 128
 129    /* TODO: do a single allocation */
 130
 131    buf = CALLOC_STRUCT(malloc_buffer);
 132    if(!buf)
 133       return NULL;
 134
 135    pipe_reference_init(&buf->base.base.reference, 1);
 136    buf->base.base.alignment = desc->alignment;
 137    buf->base.base.usage = desc->usage;
 138    buf->base.base.size = size;
 139    buf->base.vtbl = &malloc_buffer_vtbl;
 140
 141    buf->data = align_malloc(size, desc->alignment < sizeof(void*) ? sizeof(void*) : desc->alignment);
 142    if(!buf->data) {
 143       FREE(buf);
 144       return NULL;
 145    }
 146
 147    return &buf->base;
 148 }
 149
 150
 151 static struct pb_buffer *
 152 pb_malloc_bufmgr_create_buffer(struct pb_manager *mgr,
 153                                size_t size,
 154                                const struct pb_desc *desc)
 155 {
 156    return pb_malloc_buffer_create(size, desc);
 157 }
 158
 159
 160 static void
 161 pb_malloc_bufmgr_flush(struct pb_manager *mgr)
 162 {
 163    /* No-op */
 164 }
 165
 166
 167 static void
 168 pb_malloc_bufmgr_destroy(struct pb_manager *mgr)
 169 {
 170    /* No-op */
 171 }
 172
 173
 174 static struct pb_manager
 175 pb_malloc_bufmgr = {
 176    pb_malloc_bufmgr_destroy,
 177    pb_malloc_bufmgr_create_buffer,
 178    pb_malloc_bufmgr_flush
 179 };
 180
 181
 182 struct pb_manager *
 183 pb_malloc_bufmgr_create(void)
 184 {
 185   return &pb_malloc_bufmgr;
 186 }