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cbbe90dd JB |
1 | #pragma once |
2 | /* | |
3 | * This file is part of the libCEC(R) library. | |
4 | * | |
5 | * libCEC(R) is Copyright (C) 2011-2013 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 | }; |