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 "os-dependent.h"
  35 #include <stdint.h>
  36
  37 namespace CEC
  38 {
  39   class CMutex;
  40
  41   class CCondition
  42   {
  43   public:
  44     CCondition(void);
  45     virtual ~CCondition(void);
  46
  47     void Broadcast(void);
  48     void Signal(void);
  49     bool Wait(CMutex *mutex, uint32_t iTimeout = 0);
  50     static void Sleep(uint32_t iTimeout);
  51
  52   private:
  53     pthread_cond_t  m_cond;
  54   };
  55
  56   class CMutex
  57   {
  58   public:
  59     CMutex(bool bRecursive = true);
  60     virtual ~CMutex(void);
  61
  62     bool TryLock(void);
  63     bool Lock(void);
  64     void Unlock(void);
  65
  66     pthread_mutex_t m_mutex;
  67
  68   private:
  69     static pthread_mutexattr_t *GetMutexAttribute();
  70   };
  71
  72   class CLockObject
  73   {
  74   public:
  75     CLockObject(CMutex *mutex, bool bTryLock = false);
  76     ~CLockObject(void);
  77
  78     bool IsLocked(void) const { return m_bLocked; }
  79     void Leave(void);
  80     void Lock(void);
  81
  82   private:
  83     CMutex *m_mutex;
  84     bool    m_bLocked;
  85   };
  86
  87   class CThread
  88   {
  89   public:
  90     CThread(void);
  91     virtual ~CThread(void);
  92
  93     virtual bool IsRunning(void) const { return m_bRunning; }
  94     virtual bool CreateThread(bool bWait = true);
  95     virtual bool StopThread(bool bWaitForExit = true);
  96     virtual bool IsStopped(void) const { return m_bStop; };
  97     virtual bool Sleep(uint32_t iTimeout);
  98
  99     static void *ThreadHandler(CThread *thread);
 100     virtual void *Process(void) = 0;
 101
 102   protected:
 103     CCondition m_threadCondition;
 104
 105   private:
 106     pthread_t  m_thread;
 107     CMutex     m_threadMutex;
 108     bool       m_bStop;
 109     bool       m_bRunning;
 110   };
 111 };