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_buffer_fenced.h"
  43 #include "pb_validate.h"
  44
  45
  46 #define PB_VALIDATE_INITIAL_SIZE 1 /* 512 */
  47
  48
  49 struct pb_validate_entry
  50 {
  51    struct pb_buffer *buf;
  52    unsigned flags;
  53 };
  54
  55
  56 struct pb_validate
  57 {
  58    struct pb_validate_entry *entries;
  59    unsigned used;
  60    unsigned size;
  61 };
  62
  63
  64 enum pipe_error
  65 pb_validate_add_buffer(struct pb_validate *vl,
  66                        struct pb_buffer *buf,
  67                        unsigned flags)
  68 {
  69    assert(buf);
  70    if(!buf)
  71       return PIPE_ERROR;
  72
  73    assert(flags & PIPE_BUFFER_USAGE_GPU_READ_WRITE);
  74    assert(!(flags & ~PIPE_BUFFER_USAGE_GPU_READ_WRITE));
  75    flags &= PIPE_BUFFER_USAGE_GPU_READ_WRITE;
  76
  77    /* We only need to store one reference for each buffer, so avoid storing
  78     * consecutive references for the same buffer. It might not be the most
  79     * common pattern, but it is easy to implement.
  80     */
  81    if(vl->used && vl->entries[vl->used - 1].buf == buf) {
  82       vl->entries[vl->used - 1].flags |= flags;
  83       return PIPE_OK;
  84    }
  85
  86    /* Grow the table */
  87    if(vl->used == vl->size) {
  88       unsigned new_size;
  89       struct pb_validate_entry *new_entries;
  90
  91       new_size = vl->size * 2;
  92       if(!new_size)
  93          return PIPE_ERROR_OUT_OF_MEMORY;
  94
  95       new_entries = (struct pb_validate_entry *)REALLOC(vl->entries,
  96                                                         vl->size*sizeof(struct pb_validate_entry),
  97                                                         new_size*sizeof(struct pb_validate_entry));
  98       if(!new_entries)
  99          return PIPE_ERROR_OUT_OF_MEMORY;
 100
 101       memset(new_entries + vl->size, 0, (new_size - vl->size)*sizeof(struct pb_validate_entry));
 102
 103       vl->size = new_size;
 104       vl->entries = new_entries;
 105    }
 106
 107    assert(!vl->entries[vl->used].buf);
 108    pb_reference(&vl->entries[vl->used].buf, buf);
 109    vl->entries[vl->used].flags = flags;
 110    ++vl->used;
 111
 112    return PIPE_OK;
 113 }
 114
 115
 116 enum pipe_error
 117 pb_validate_foreach(struct pb_validate *vl,
 118                     enum pipe_error (*callback)(struct pb_buffer *buf, void *data),
 119                     void *data)
 120 {
 121    unsigned i;
 122    for(i = 0; i < vl->used; ++i) {
 123       enum pipe_error ret;
 124       ret = callback(vl->entries[i].buf, data);
 125       if(ret != PIPE_OK)
 126          return ret;
 127    }
 128    return PIPE_OK;
 129 }
 130
 131
 132 enum pipe_error
 133 pb_validate_validate(struct pb_validate *vl)
 134 {
 135    unsigned i;
 136
 137    for(i = 0; i < vl->used; ++i) {
 138       enum pipe_error ret;
 139       ret = pb_validate(vl->entries[i].buf, vl, vl->entries[i].flags);
 140       if(ret != PIPE_OK) {
 141          while(i--)
 142             pb_validate(vl->entries[i].buf, NULL, 0);
 143          return ret;
 144       }
 145    }
 146
 147    return PIPE_OK;
 148 }
 149
 150
 151 void
 152 pb_validate_fence(struct pb_validate *vl,
 153                   struct pipe_fence_handle *fence)
 154 {
 155    unsigned i;
 156    for(i = 0; i < vl->used; ++i) {
 157       pb_fence(vl->entries[i].buf, fence);
 158       pb_reference(&vl->entries[i].buf, NULL);
 159    }
 160    vl->used = 0;
 161 }
 162
 163
 164 void
 165 pb_validate_destroy(struct pb_validate *vl)
 166 {
 167    unsigned i;
 168    for(i = 0; i < vl->used; ++i)
 169       pb_reference(&vl->entries[i].buf, NULL);
 170    FREE(vl->entries);
 171    FREE(vl);
 172 }
 173
 174
 175 struct pb_validate *
 176 pb_validate_create()
 177 {
 178    struct pb_validate *vl;
 179
 180    vl = CALLOC_STRUCT(pb_validate);
 181    if(!vl)
 182       return NULL;
 183
 184    vl->size = PB_VALIDATE_INITIAL_SIZE;
 185    vl->entries = (struct pb_validate_entry *)CALLOC(vl->size, sizeof(struct pb_validate_entry));
 186    if(!vl->entries) {
 187       FREE(vl);
 188       return NULL;
 189    }
 190
 191    return vl;
 192 }
 193