src/lib/platform/threads.cpp

   1 /*
   2  * This file is part of the libCEC(R) library.
   3  *
   4  * libCEC(R) is Copyright (C) 2011 Pulse-Eight Limited.  All rights reserved.
   5  * libCEC(R) is an original work, containing original code.
   6  *
   7  * libCEC(R) is a trademark of Pulse-Eight Limited.
   8  *
   9  * This program is dual-licensed; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  22  *
  23  *
  24  * Alternatively, you can license this library under a commercial license,
  25  * please contact Pulse-Eight Licensing for more information.
  26  *
  27  * For more information contact:
  28  * Pulse-Eight Licensing       <license@pulse-eight.com>
  29  *     http://www.pulse-eight.com/
  30  *     http://www.pulse-eight.net/
  31  */
  32
  33 #include "threads.h"
  34 #include "timeutils.h"
  35 #include "os-dependent.h"
  36
  37 using namespace CEC;
  38
  39 CLockObject::CLockObject(IMutex *mutex, bool bTryLock /* = false */) :
  40   m_mutex(mutex)
  41 {
  42   if (m_mutex)
  43     m_bLocked = bTryLock ? m_mutex->TryLock() : m_mutex->Lock();
  44 }
  45
  46 CLockObject::~CLockObject(void)
  47 {
  48   Leave();
  49   m_mutex = NULL;
  50 }
  51
  52 void CLockObject::Leave(void)
  53 {
  54   if (m_mutex && m_bLocked)
  55   {
  56     m_bLocked = false;
  57     m_mutex->Unlock();
  58   }
  59 }
  60
  61 void CLockObject::Lock(void)
  62 {
  63   if (m_mutex)
  64     m_bLocked = m_mutex->Lock();
  65 }
  66
  67 void ICondition::Sleep(uint32_t iTimeout)
  68 {
  69   CCondition w;
  70   CMutex m;
  71   CLockObject lock(&m);
  72   w.Wait(&m, iTimeout);
  73 }
  74
  75 IThread::IThread(void) :
  76     m_bStop(false),
  77     m_bRunning(false)
  78 {
  79   m_threadCondition = new CCondition();
  80   m_threadMutex     = new CMutex();
  81 }
  82
  83 IThread::~IThread(void)
  84 {
  85   StopThread();
  86   delete m_threadCondition;
  87   delete m_threadMutex;
  88 }
  89
  90 bool IThread::StopThread(bool bWaitForExit /* = true */)
  91 {
  92   m_bStop = true;
  93   m_threadCondition->Broadcast();
  94   bWaitForExit = true;
  95
  96   return false;
  97 }
  98
  99 bool IThread::Sleep(uint32_t iTimeout)
 100 {
 101   CLockObject lock(m_threadMutex);
 102   return m_bStop ? false : m_threadCondition->Wait(m_threadMutex, iTimeout);
 103 }