74d683f273fa5056916d47300302f7f8f1f6da2c
[deb_libcec.git] / src / lib / platform / threads / 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 "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
45 virtual ~CThread(void)
46 {
47 StopThread();
48 }
49
50 static void *ThreadHandler(CThread *thread)
51 {
52 void *retVal = NULL;
53
54 if (thread)
55 {
56 CLockObject lock(thread->m_threadMutex);
57 thread->m_bRunning = true;
58 lock.Unlock();
59 thread->m_threadCondition.Broadcast();
60
61 retVal = thread->Process();
62
63 lock.Lock();
64 thread->m_bRunning = false;
65 lock.Unlock();
66 thread->m_threadCondition.Broadcast();
67 }
68
69 return retVal;
70 }
71
72 inline bool IsRunning(void)
73 {
74 CLockObject lock(m_threadMutex);
75 return m_bRunning;
76 }
77
78 inline bool IsStopped(void)
79 {
80 CLockObject lock(m_threadMutex);
81 return m_bStop;
82 }
83
84 inline bool CreateThread(bool bWait = true)
85 {
86 bool bReturn(false);
87 CLockObject lock(m_threadMutex);
88 if (!IsRunning())
89 {
90 if (ThreadsCreate(m_thread, CThread::ThreadHandler, ((void*)static_cast<CThread *>(this))))
91 {
92 if (bWait)
93 m_threadCondition.Wait(m_threadMutex);
94 bReturn = true;
95 }
96 }
97 return bReturn;
98 }
99
100 inline bool StopThread(bool bWaitForExit = true)
101 {
102 bool bReturn(true);
103 bool bRunning(false);
104 {
105 CLockObject lock(m_threadMutex);
106 bRunning = IsRunning();
107 m_bStop = true;
108 m_threadCondition.Broadcast();
109 }
110
111 if (bRunning && bWaitForExit)
112 {
113 void *retVal = NULL;
114 bReturn = ThreadsWait(m_thread, &retVal);
115 }
116 return true;
117 }
118
119 inline bool Sleep(uint32_t iTimeout)
120 {
121 CLockObject lock(m_threadMutex);
122 return m_bStop ? false : m_threadCondition.Wait(m_threadMutex, iTimeout);
123 }
124
125 virtual void *Process(void) = 0;
126
127 protected:
128 void SetRunning(bool bSetTo);
129
130 private:
131 bool m_bStop;
132 bool m_bRunning;
133 CCondition m_threadCondition;
134 CMutex m_threadMutex;
135 thread_t m_thread;
136 };
137 };