source/BotThreading.H

   1 // BotThreading.H  -*- C++ -*-
   2 // Copyright (c) 2008 Clinton Ebadi
   3
   4 // This program is free software; you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation; either version 2 of the License, or
   7 // any later version.
   8
   9 // This program is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License
  15 // along with this program; if not, write to the Free Software
  16 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  17 // 02110-1301, USA.
  18
  19 // Basic Mutex and automatic lock interface that falls back to noops
  20 // (wasting one byte of space for each fake mutex...oh well) in the
  21 // absence of threading. This is intended to be used to ensure that
  22 // multiple Guile threads can call the bot without corrupting its data
  23 // structures without forcing pthreads or locking overhead on the
  24 // usual single threaded standalone bot
  25
  26 #include "config.h"
  27
  28 #ifdef MULTITHREAD
  29 #include <pthread.h>
  30 #endif
  31
  32 class BotMutex
  33 {
  34 #ifdef MULTITHREAD
  35   pthread_mutex_t mutex;
  36 #endif
  37
  38 public:
  39   BotMutex ();
  40   ~BotMutex ();
  41
  42   void lock ();
  43   void unlock ();
  44 };
  45
  46 // Interface to automatically acquire and release a BotMutex within a
  47 // block
  48 class BotLock
  49 {
  50   BotMutex& mutex;
  51
  52 public:
  53   BotLock (BotMutex & m);
  54   ~BotLock ();
  55 };
  56
  57