workbench/libs/mesa/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_defines.h"
  38 #include "util/u_memory.h"
  39 #include "util/u_debug.h"
  40
  41 #include "pb_buffer.h"
  42 #include "pb_validate.h"
  43
  44
  45 #define PB_VALIDATE_INITIAL_SIZE 1 /* 512 */
  46
  47
  48 struct pb_validate_entry
  49 {
  50    struct pb_buffer *buf;
  51    unsigned flags;
  52 };
  53
  54
  55 struct pb_validate
  56 {
  57    struct pb_validate_entry *entries;
  58    unsigned used;
  59    unsigned size;
  60 };
  61
  62
  63 enum pipe_error
  64 pb_validate_add_buffer(struct pb_validate *vl,
  65                        struct pb_buffer *buf,
  66                        unsigned flags)
  67 {
  68    assert(buf);
  69    if(!buf)
  70       return PIPE_ERROR;
  71
  72    assert(flags & PB_USAGE_GPU_READ_WRITE);
  73    assert(!(flags & ~PB_USAGE_GPU_READ_WRITE));
  74    flags &= PB_USAGE_GPU_READ_WRITE;
  75
  76    /* We only need to store one reference for each buffer, so avoid storing
  77     * consecutive references for the same buffer. It might not be the most
  78     * common pattern, but it is easy to implement.
  79     */
  80    if(vl->used && vl->entries[vl->used - 1].buf == buf) {
  81       vl->entries[vl->used - 1].flags |= flags;
  82       return PIPE_OK;
  83    }
  84
  85    /* Grow the table */
  86    if(vl->used == vl->size) {
  87       unsigned new_size;
  88       struct pb_validate_entry *new_entries;
  89
  90       new_size = vl->size * 2;
  91       if(!new_size)
  92          return PIPE_ERROR_OUT_OF_MEMORY;
  93
  94       new_entries = (struct pb_validate_entry *)REALLOC(vl->entries,
  95                                                         vl->size*sizeof(struct pb_validate_entry),
  96                                                         new_size*sizeof(struct pb_validate_entry));
  97       if(!new_entries)
  98          return PIPE_ERROR_OUT_OF_MEMORY;
  99
 100       memset(new_entries + vl->size, 0, (new_size - vl->size)*sizeof(struct pb_validate_entry));
 101
 102       vl->size = new_size;
 103       vl->entries = new_entries;
 104    }
 105
 106    assert(!vl->entries[vl->used].buf);
 107    pb_reference(&vl->entries[vl->used].buf, buf);
 108    vl->entries[vl->used].flags = flags;
 109    ++vl->used;
 110
 111    return PIPE_OK;
 112 }
 113
 114
 115 enum pipe_error
 116 pb_validate_foreach(struct pb_validate *vl,
 117                     enum pipe_error (*callback)(struct pb_buffer *buf, void *data),
 118                     void *data)
 119 {
 120    unsigned i;
 121    for(i = 0; i < vl->used; ++i) {
 122       enum pipe_error ret;
 123       ret = callback(vl->entries[i].buf, data);
 124       if(ret != PIPE_OK)
 125          return ret;
 126    }
 127    return PIPE_OK;
 128 }
 129
 130
 131 enum pipe_error
 132 pb_validate_validate(struct pb_validate *vl)
 133 {
 134    unsigned i;
 135
 136    for(i = 0; i < vl->used; ++i) {
 137       enum pipe_error ret;
 138       ret = pb_validate(vl->entries[i].buf, vl, vl->entries[i].flags);
 139       if(ret != PIPE_OK) {
 140          while(i--)
 141             pb_validate(vl->entries[i].buf, NULL, 0);
 142          return ret;
 143       }
 144    }
 145
 146    return PIPE_OK;
 147 }
 148
 149
 150 void
 151 pb_validate_fence(struct pb_validate *vl,
 152                   struct pipe_fence_handle *fence)
 153 {
 154    unsigned i;
 155    for(i = 0; i < vl->used; ++i) {
 156       pb_fence(vl->entries[i].buf, fence);
 157       pb_reference(&vl->entries[i].buf, NULL);
 158    }
 159    vl->used = 0;
 160 }
 161
 162
 163 void
 164 pb_validate_destroy(struct pb_validate *vl)
 165 {
 166    unsigned i;
 167    for(i = 0; i < vl->used; ++i)
 168       pb_reference(&vl->entries[i].buf, NULL);
 169    FREE(vl->entries);
 170    FREE(vl);
 171 }
 172
 173
 174 struct pb_validate *
 175 pb_validate_create()
 176 {
 177    struct pb_validate *vl;
 178
 179    vl = CALLOC_STRUCT(pb_validate);
 180    if(!vl)
 181       return NULL;
 182
 183    vl->size = PB_VALIDATE_INITIAL_SIZE;
 184    vl->entries = (struct pb_validate_entry *)CALLOC(vl->size, sizeof(struct pb_validate_entry));
 185    if(!vl->entries) {
 186       FREE(vl);
 187       return NULL;
 188    }
 189
 190    return vl;
 191 }
 192