accel.h

   1 // Copyright 2008 David Hilvert <dhilvert@auricle.dyndns.org>,
   2 //                              <dhilvert@gmail.com>
   3
   4 /*  This file is part of the Anti-Lamenessing Engine.
   5
   6     The Anti-Lamenessing Engine is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 3 of the License, or
   9     (at your option) any later version.
  10
  11     The Anti-Lamenessing Engine is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with the Anti-Lamenessing Engine; if not, write to the Free Software
  18     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19 */
  20
  21 /*
  22  * accel.h: acceleration
  23  */
  24
  25 #ifndef __accel_h__
  26 #define __accel_h__
  27
  28 #include "gpu.h"
  29
  30 #include <assert.h>
  31 #include <stdio.h>
  32 #include <string.h>
  33 #include <stdlib.h>
  34
  35 class accel {
  36         static int use_gpu;
  37
  38 public:
  39
  40         static void set_gpu() {
  41                 use_gpu = 1;
  42         }
  43
  44         static void set_none() {
  45                 use_gpu = 0;
  46         }
  47
  48         static void set_auto() {
  49                 const char *accel_default = getenv("ALE_GPU_ACCEL_DEFAULT");
  50                 if (accel_default && !strcmp(accel_default, "1") && gpu::is_ok())
  51                         use_gpu = 1;
  52                 else
  53                         use_gpu = 0;
  54         }
  55
  56         static int is_gpu() {
  57                 if (use_gpu == 2)
  58                         set_auto();
  59
  60                 if (use_gpu > 0 && gpu::is_ok())
  61                         return 1;
  62
  63                 if (use_gpu == 1) {
  64                         fprintf(stderr, "GPU acceleration error.\n");
  65                         exit(1);
  66                 }
  67
  68                 return 0;
  69         }
  70 };
  71
  72 #endif