Merge branch 'master' into release
[deb_libcec.git] / src / lib / platform / threads.cpp
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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
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36using namespace CEC;
37
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38CMutex::CMutex(void)
39{
40 pthread_mutex_init(&m_mutex, NULL);
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41}
42
43CMutex::~CMutex(void)
44{
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45 pthread_mutex_destroy(&m_mutex);
46}
47
60fa4578 48bool CMutex::TryLock(void)
abbca718 49{
60fa4578 50 return (pthread_mutex_trylock(&m_mutex) == 0);
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51}
52
53bool CMutex::Lock(void)
54{
60fa4578 55 return (pthread_mutex_lock(&m_mutex) == 0);
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56}
57
58void CMutex::Unlock(void)
59{
60 pthread_mutex_unlock(&m_mutex);
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61}
62
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63CLockObject::CLockObject(CMutex *mutex) :
64 m_mutex(mutex)
abbca718 65{
60fa4578 66 m_mutex->Lock();
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67}
68
69CLockObject::~CLockObject(void)
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70{
71 Leave();
72 m_mutex = NULL;
73}
74
75void CLockObject::Leave(void)
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76{
77 m_mutex->Unlock();
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78}
79
80void CLockObject::Lock(void)
81{
82 m_mutex->Lock();
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83}
84
85CCondition::CCondition(void)
86{
87 pthread_cond_init(&m_cond, NULL);
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88}
89
90CCondition::~CCondition(void)
91{
92 pthread_cond_broadcast(&m_cond);
93 pthread_cond_destroy(&m_cond);
94}
95
96void CCondition::Signal(void)
97{
98 pthread_cond_broadcast(&m_cond);
99}
100
101bool CCondition::Wait(CMutex *mutex, int64_t iTimeout)
102{
60fa4578 103 bool bReturn(false);
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104 struct timespec abstime;
105 struct timeval now;
106 if (gettimeofday(&now, NULL) == 0)
107 {
108 iTimeout += now.tv_usec / 1000;
109 abstime.tv_sec = now.tv_sec + (time_t)(iTimeout / 1000);
110 abstime.tv_nsec = (long)((iTimeout % (unsigned long)1000) * (unsigned long)1000000);
60fa4578 111 bReturn = (pthread_cond_timedwait(&m_cond, &mutex->m_mutex, &abstime) == 0);
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112 }
113
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114 return bReturn;
115}
116
117void CCondition::Sleep(int iTimeout)
118{
119 sched_yield();
120 CCondition w;
121 CMutex m;
60fa4578 122 CLockObject lock(&m);
f7e6ba70 123 w.Wait(&m, int64_t(iTimeout));
abbca718 124}
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125
126CThread::CThread(void) :
127 m_bRunning(false),
128 m_bStop(false)
129{
130}
131
132CThread::~CThread(void)
133{
134 m_bStop = true;
135 pthread_join(m_thread, NULL);
136}
137
138bool CThread::CreateThread(void)
139{
140 bool bReturn(false);
141
142 if (!m_bRunning && pthread_create(&m_thread, NULL, (void *(*) (void *))&CThread::ThreadHandler, (void *)this) == 0)
143 {
144 m_bRunning = true;
145 pthread_detach(m_thread);
146 bReturn = true;
147 }
148
149 return bReturn;
150}
151
152void *CThread::ThreadHandler(CThread *thread)
153{
154 if (thread)
155 return thread->Process();
156 return NULL;
157}
158
9043a357 159void CThread::StopThread(bool bWaitForExit /* = true */)
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160{
161 m_bStop = true;
162 if (bWaitForExit)
163 pthread_join(m_thread, NULL);
164}