| 1 | #pragma once |
| 2 | /* |
| 3 | * This file is part of the libCEC(R) library. |
| 4 | * |
| 5 | * libCEC(R) is Copyright (C) 2011-2012 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 "mutex.h" |
| 35 | |
| 36 | namespace PLATFORM |
| 37 | { |
| 38 | class CThread |
| 39 | { |
| 40 | public: |
| 41 | CThread(void) : |
| 42 | m_bStop(false), |
| 43 | m_bRunning(false), |
| 44 | m_bStopped(false), |
| 45 | m_thread(INVALID_THREAD_VALUE) {} |
| 46 | |
| 47 | virtual ~CThread(void) |
| 48 | { |
| 49 | StopThread(0); |
| 50 | void *retVal = NULL; |
| 51 | if (m_thread != INVALID_THREAD_VALUE) |
| 52 | if (ThreadsWait(m_thread, &retVal)){}; // silence unused warning |
| 53 | } |
| 54 | |
| 55 | static void *ThreadHandler(CThread *thread) |
| 56 | { |
| 57 | void *retVal = NULL; |
| 58 | |
| 59 | if (thread) |
| 60 | { |
| 61 | { |
| 62 | CLockObject lock(thread->m_threadMutex); |
| 63 | thread->m_bRunning = true; |
| 64 | thread->m_bStopped = false; |
| 65 | thread->m_threadCondition.Broadcast(); |
| 66 | } |
| 67 | |
| 68 | retVal = thread->Process(); |
| 69 | |
| 70 | { |
| 71 | CLockObject lock(thread->m_threadMutex); |
| 72 | thread->m_bRunning = false; |
| 73 | thread->m_bStopped = true; |
| 74 | thread->m_threadCondition.Broadcast(); |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | return retVal; |
| 79 | } |
| 80 | |
| 81 | virtual bool IsRunning(void) |
| 82 | { |
| 83 | CLockObject lock(m_threadMutex); |
| 84 | return m_bRunning; |
| 85 | } |
| 86 | |
| 87 | virtual bool IsStopped(void) |
| 88 | { |
| 89 | CLockObject lock(m_threadMutex); |
| 90 | return m_bStop; |
| 91 | } |
| 92 | |
| 93 | virtual bool CreateThread(bool bWait = true) |
| 94 | { |
| 95 | bool bReturn(false); |
| 96 | CLockObject lock(m_threadMutex); |
| 97 | if (!IsRunning()) |
| 98 | { |
| 99 | m_bStop = false; |
| 100 | if (ThreadsCreate(m_thread, CThread::ThreadHandler, ((void*)static_cast<CThread *>(this)))) |
| 101 | { |
| 102 | if (bWait) |
| 103 | m_threadCondition.Wait(m_threadMutex, m_bRunning); |
| 104 | bReturn = true; |
| 105 | } |
| 106 | } |
| 107 | return bReturn; |
| 108 | } |
| 109 | |
| 110 | /*! |
| 111 | * @brief Stop the thread |
| 112 | * @param iWaitMs negative = don't wait, 0 = infinite, or the amount of ms to wait |
| 113 | */ |
| 114 | virtual bool StopThread(int iWaitMs = 5000) |
| 115 | { |
| 116 | bool bReturn(true); |
| 117 | bool bRunning(false); |
| 118 | { |
| 119 | CLockObject lock(m_threadMutex); |
| 120 | bRunning = IsRunning(); |
| 121 | m_bStop = true; |
| 122 | } |
| 123 | |
| 124 | if (bRunning && iWaitMs >= 0) |
| 125 | { |
| 126 | CLockObject lock(m_threadMutex); |
| 127 | bReturn = m_threadCondition.Wait(m_threadMutex, m_bStopped, iWaitMs); |
| 128 | } |
| 129 | else |
| 130 | { |
| 131 | bReturn = true; |
| 132 | } |
| 133 | |
| 134 | return bReturn; |
| 135 | } |
| 136 | |
| 137 | virtual bool Sleep(uint32_t iTimeout) |
| 138 | { |
| 139 | CLockObject lock(m_threadMutex); |
| 140 | return m_bStop ? false : m_threadCondition.Wait(m_threadMutex, m_bStopped, iTimeout); |
| 141 | } |
| 142 | |
| 143 | virtual void *Process(void) = 0; |
| 144 | |
| 145 | protected: |
| 146 | void SetRunning(bool bSetTo); |
| 147 | CMutex m_threadMutex; |
| 148 | |
| 149 | private: |
| 150 | bool m_bStop; |
| 151 | bool m_bRunning; |
| 152 | bool m_bStopped; |
| 153 | CCondition<bool> m_threadCondition; |
| 154 | thread_t m_thread; |
| 155 | }; |
| 156 | }; |