src/gallium/drivers/trace/tr_buffer.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.
   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 #include "util/u_memory.h"
  30
  31 #include "tr_buffer.h"
  32
  33
  34 struct pipe_buffer *
  35 trace_buffer_create(struct trace_screen *tr_scr,
  36                     struct pipe_buffer *buffer)
  37 {
  38    struct trace_buffer *tr_buf;
  39
  40    if(!buffer)
  41       goto error;
  42
  43    assert(buffer->screen == tr_scr->screen);
  44
  45    tr_buf = CALLOC_STRUCT(trace_buffer);
  46    if(!tr_buf)
  47       goto error;
  48
  49    memcpy(&tr_buf->base, buffer, sizeof(struct pipe_buffer));
  50
  51    pipe_reference_init(&tr_buf->base.reference, 1);
  52    tr_buf->base.screen = &tr_scr->base;
  53    tr_buf->buffer = buffer;
  54
  55    return &tr_buf->base;
  56
  57 error:
  58    pipe_buffer_reference(&buffer, NULL);
  59    return NULL;
  60 }
  61
  62
  63 void
  64 trace_buffer_destroy(struct trace_screen *tr_scr,
  65                      struct pipe_buffer *buffer)
  66 {
  67    struct trace_buffer *tr_buf = trace_buffer(tr_scr, buffer);
  68    pipe_buffer_reference(&tr_buf->buffer, NULL);
  69    FREE(tr_buf);
  70 }