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 {
  75    return malloc_buffer(buf)->data;
  76 }
  77
  78
  79 static void
  80 malloc_buffer_unmap(struct pb_buffer *buf)
  81 {
  82    /* No-op */
  83 }
  84
  85
  86 static enum pipe_error
  87 malloc_buffer_validate(struct pb_buffer *buf,
  88                        struct pb_validate *vl,
  89                        unsigned flags)
  90 {
  91    assert(0);
  92    return PIPE_ERROR;
  93 }
  94
  95
  96 static void
  97 malloc_buffer_fence(struct pb_buffer *buf,
  98                     struct pipe_fence_handle *fence)
  99 {
 100    assert(0);
 101 }
 102
 103
 104 static void
 105 malloc_buffer_get_base_buffer(struct pb_buffer *buf,
 106                               struct pb_buffer **base_buf,
 107                               pb_size *offset)
 108 {
 109    *base_buf = buf;
 110    *offset = 0;
 111 }
 112
 113
 114 const struct pb_vtbl
 115 malloc_buffer_vtbl = {
 116       malloc_buffer_destroy,
 117       malloc_buffer_map,
 118       malloc_buffer_unmap,
 119       malloc_buffer_validate,
 120       malloc_buffer_fence,
 121       malloc_buffer_get_base_buffer
 122 };
 123
 124
 125 struct pb_buffer *
 126 pb_malloc_buffer_create(pb_size size,
 127                         const struct pb_desc *desc)
 128 {
 129    struct malloc_buffer *buf;
 130
 131    /* TODO: do a single allocation */
 132
 133    buf = CALLOC_STRUCT(malloc_buffer);
 134    if(!buf)
 135       return NULL;
 136
 137    pipe_reference_init(&buf->base.base.reference, 1);
 138    buf->base.base.usage = desc->usage;
 139    buf->base.base.size = size;
 140    buf->base.base.alignment = desc->alignment;
 141    buf->base.vtbl = &malloc_buffer_vtbl;
 142
 143    buf->data = align_malloc(size, desc->alignment < sizeof(void*) ? sizeof(void*) : desc->alignment);
 144    if(!buf->data) {
 145       FREE(buf);
 146       return NULL;
 147    }
 148
 149    return &buf->base;
 150 }
 151
 152
 153 static struct pb_buffer *
 154 pb_malloc_bufmgr_create_buffer(struct pb_manager *mgr,
 155                                pb_size size,
 156                                const struct pb_desc *desc)
 157 {
 158    return pb_malloc_buffer_create(size, desc);
 159 }
 160
 161
 162 static void
 163 pb_malloc_bufmgr_flush(struct pb_manager *mgr)
 164 {
 165    /* No-op */
 166 }
 167
 168
 169 static void
 170 pb_malloc_bufmgr_destroy(struct pb_manager *mgr)
 171 {
 172    /* No-op */
 173 }
 174
 175
 176 static struct pb_manager
 177 pb_malloc_bufmgr = {
 178    pb_malloc_bufmgr_destroy,
 179    pb_malloc_bufmgr_create_buffer,
 180    pb_malloc_bufmgr_flush
 181 };
 182
 183
 184 struct pb_manager *
 185 pb_malloc_bufmgr_create(void)
 186 {
 187   return &pb_malloc_bufmgr;
 188 }