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  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 "util/u_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.                              pb_size 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_flush(struct pb_manager *_mgr)
  80. {
  81.    struct pb_alt_manager *mgr = pb_alt_manager(_mgr);
  82.    
  83.    assert(mgr->provider1->flush);
  84.    if(mgr->provider1->flush)
  85.       mgr->provider1->flush(mgr->provider1);
  86.    
  87.    assert(mgr->provider2->flush);
  88.    if(mgr->provider2->flush)
  89.       mgr->provider2->flush(mgr->provider2);
  90. }
  91.  
  92.  
  93. static void
  94. pb_alt_manager_destroy(struct pb_manager *mgr)
  95. {
  96.    FREE(mgr);
  97. }
  98.  
  99.  
  100. struct pb_manager *
  101. pb_alt_manager_create(struct pb_manager *provider1,
  102.                       struct pb_manager *provider2)
  103. {
  104.    struct pb_alt_manager *mgr;
  105.  
  106.    if(!provider1 || !provider2)
  107.       return NULL;
  108.    
  109.    mgr = CALLOC_STRUCT(pb_alt_manager);
  110.    if (!mgr)
  111.       return NULL;
  112.  
  113.    mgr->base.destroy = pb_alt_manager_destroy;
  114.    mgr->base.create_buffer = pb_alt_manager_create_buffer;
  115.    mgr->base.flush = pb_alt_manager_flush;
  116.    mgr->provider1 = provider1;
  117.    mgr->provider2 = provider2;
  118.      
  119.    return &mgr->base;
  120. }
  121.