src/gallium/auxiliary/pipebuffer/pb_validate.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 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  * Buffer validation.
  31  *
  32  * @author Jose Fonseca <jrfonseca@tungstengraphics.com>
  33  */
  34
  35
  36 #include "pipe/p_compiler.h"
  37 #include "pipe/p_error.h"
  38 #include "util/u_memory.h"
  39 #include "pipe/p_debug.h"
  40
  41 #include "pb_buffer.h"
  42 #include "pb_buffer_fenced.h"
  43 #include "pb_validate.h"
  44
  45
  46 #define PB_VALIDATE_INITIAL_SIZE 1 /* 512 */
  47
  48
  49 struct pb_validate
  50 {
  51    struct pb_buffer **buffers;
  52    unsigned used;
  53    unsigned size;
  54 };
  55
  56
  57 enum pipe_error
  58 pb_validate_add_buffer(struct pb_validate *vl,
  59                        struct pb_buffer *buf)
  60 {
  61    assert(buf);
  62    if(!buf)
  63       return PIPE_ERROR;
  64
  65    /* We only need to store one reference for each buffer, so avoid storing
  66     * consecutive references for the same buffer. It might not be the more
  67     * common pasttern, but it is easy to implement.
  68     */
  69    if(vl->used && vl->buffers[vl->used - 1] == buf) {
  70       return PIPE_OK;
  71    }
  72
  73    /* Grow the table */
  74    if(vl->used == vl->size) {
  75       unsigned new_size;
  76       struct pb_buffer **new_buffers;
  77
  78       new_size = vl->size * 2;
  79       if(!new_size)
  80          return PIPE_ERROR_OUT_OF_MEMORY;
  81
  82       new_buffers = (struct pb_buffer **)REALLOC(vl->buffers,
  83                                                  vl->size*sizeof(struct pb_buffer *),
  84                                                  new_size*sizeof(struct pb_buffer *));
  85       if(!new_buffers)
  86          return PIPE_ERROR_OUT_OF_MEMORY;
  87
  88       memset(new_buffers + vl->size, 0, (new_size - vl->size)*sizeof(struct pb_buffer *));
  89
  90       vl->size = new_size;
  91       vl->buffers = new_buffers;
  92    }
  93
  94    assert(!vl->buffers[vl->used]);
  95    pb_reference(&vl->buffers[vl->used], buf);
  96    ++vl->used;
  97
  98    return PIPE_OK;
  99 }
 100
 101
 102 enum pipe_error
 103 pb_validate_validate(struct pb_validate *vl)
 104 {
 105    /* FIXME: go through each buffer, ensure its not mapped, its address is
 106     * available -- requires a new pb_buffer interface */
 107    return PIPE_OK;
 108 }
 109
 110
 111 void
 112 pb_validate_fence(struct pb_validate *vl,
 113                   struct pipe_fence_handle *fence)
 114 {
 115    unsigned i;
 116    for(i = 0; i < vl->used; ++i) {
 117       buffer_fence(vl->buffers[i], fence);
 118       pb_reference(&vl->buffers[i], NULL);
 119    }
 120    vl->used = 0;
 121 }
 122
 123
 124 void
 125 pb_validate_destroy(struct pb_validate *vl)
 126 {
 127    unsigned i;
 128    for(i = 0; i < vl->used; ++i)
 129       pb_reference(&vl->buffers[i], NULL);
 130    FREE(vl->buffers);
 131    FREE(vl);
 132 }
 133
 134
 135 struct pb_validate *
 136 pb_validate_create()
 137 {
 138    struct pb_validate *vl;
 139
 140    vl = CALLOC_STRUCT(pb_validate);
 141    if(!vl)
 142       return NULL;
 143
 144    vl->size = PB_VALIDATE_INITIAL_SIZE;
 145    vl->buffers = (struct pb_buffer **)CALLOC(vl->size, sizeof(struct pb_buffer *));
 146    if(!vl->buffers) {
 147       FREE(vl);
 148       return NULL;
 149    }
 150
 151    return vl;
 152 }
 153