src/gallium/auxiliary/pipebuffer/pb_bufmgr_alt.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007-2008 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  * Allocate buffers from two alternative buffer providers.
  31  *
  32  * \author Jose Fonseca <jrfonseca@tungstengraphics.com>
  33  */
  34
  35
  36 #include "pipe/p_compiler.h"
  37 #include "pipe/p_debug.h"
  38 #include "util/u_memory.h"
  39
  40 #include "pb_buffer.h"
  41 #include "pb_bufmgr.h"
  42
  43
  44 struct pb_alt_manager
  45 {
  46    struct pb_manager base;
  47
  48    struct pb_manager *provider1;
  49    struct pb_manager *provider2;
  50 };
  51
  52
  53 static INLINE struct pb_alt_manager *
  54 pb_alt_manager(struct pb_manager *mgr)
  55 {
  56    assert(mgr);
  57    return (struct pb_alt_manager *)mgr;
  58 }
  59
  60
  61 static struct pb_buffer *
  62 pb_alt_manager_create_buffer(struct pb_manager *_mgr,
  63                              size_t size,
  64                              const struct pb_desc *desc)
  65 {
  66    struct pb_alt_manager *mgr = pb_alt_manager(_mgr);
  67    struct pb_buffer *buf;
  68
  69    buf = mgr->provider1->create_buffer(mgr->provider1, size, desc);
  70    if(buf)
  71       return buf;
  72
  73    buf = mgr->provider2->create_buffer(mgr->provider2, size, desc);
  74    return buf;
  75 }
  76
  77
  78 static void
  79 pb_alt_manager_destroy(struct pb_manager *mgr)
  80 {
  81    FREE(mgr);
  82 }
  83
  84
  85 struct pb_manager *
  86 pb_alt_manager_create(struct pb_manager *provider1,
  87                       struct pb_manager *provider2)
  88 {
  89    struct pb_alt_manager *mgr;
  90
  91    if(!provider1 || !provider2)
  92       return NULL;
  93
  94    mgr = CALLOC_STRUCT(pb_alt_manager);
  95    if (!mgr)
  96       return NULL;
  97
  98    mgr->base.destroy = pb_alt_manager_destroy;
  99    mgr->base.create_buffer = pb_alt_manager_create_buffer;
 100    mgr->provider1 = provider1;
 101    mgr->provider2 = provider2;
 102
 103    return &mgr->base;
 104 }