src/lib/platform/threads.h

   1 #pragma once
   2 /*
   3  * This file is part of the libCEC(R) library.
   4  *
   5  * libCEC(R) is Copyright (C) 2011 Pulse-Eight Limited.  All rights reserved.
   6  * libCEC(R) is an original work, containing original code.
   7  *
   8  * libCEC(R) is a trademark of Pulse-Eight Limited.
   9  *
  10  * This program is dual-licensed; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  23  *
  24  *
  25  * Alternatively, you can license this library under a commercial license,
  26  * please contact Pulse-Eight Licensing for more information.
  27  *
  28  * For more information contact:
  29  * Pulse-Eight Licensing       <license@pulse-eight.com>
  30  *     http://www.pulse-eight.com/
  31  *     http://www.pulse-eight.net/
  32  */
  33
  34 #include <stdint.h>
  35
  36 namespace CEC
  37 {
  38   class IMutex
  39   {
  40   public:
  41     IMutex(bool bRecursive = true) { m_bRecursive = bRecursive ; };
  42     virtual ~IMutex(void) {};
  43
  44     virtual bool TryLock(void) = 0;
  45     virtual bool Lock(void) = 0;
  46     virtual void Unlock(void) = 0;
  47
  48   protected:
  49     bool m_bRecursive;
  50   };
  51
  52   class ICondition
  53   {
  54   public:
  55     virtual void Broadcast(void) = 0;
  56     virtual void Signal(void) = 0;
  57     virtual bool Wait(IMutex *mutex, uint32_t iTimeout = 0) = 0;
  58
  59     static void Sleep(uint32_t iTimeout);
  60   };
  61
  62   class IThread
  63   {
  64   public:
  65     IThread(void);
  66     virtual ~IThread(void);
  67
  68     virtual bool IsRunning(void) const { return m_bRunning; };
  69     virtual bool CreateThread(bool bWait = true) = 0;
  70     virtual bool IsStopped(void) const { return m_bStop; };
  71
  72     virtual bool StopThread(bool bWaitForExit = true);
  73     virtual bool Sleep(uint32_t iTimeout);
  74
  75     virtual void *Process(void) = 0;
  76
  77   protected:
  78     bool        m_bStop;
  79     bool        m_bRunning;
  80     ICondition *m_threadCondition;
  81     IMutex     *m_threadMutex;
  82   };
  83
  84   class CLockObject
  85   {
  86   public:
  87     CLockObject(IMutex *mutex, bool bTryLock = false);
  88     ~CLockObject(void);
  89
  90     bool IsLocked(void) const { return m_bLocked; }
  91     void Leave(void);
  92     void Lock(void);
  93
  94   private:
  95     IMutex *m_mutex;
  96     bool    m_bLocked;
  97   };
  98 };