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abbca718 LOK |
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 | ||
b9187cc6 LOK |
36 | using namespace CEC; |
37 | ||
abbca718 LOK |
38 | CMutex::CMutex(void) |
39 | { | |
40 | pthread_mutex_init(&m_mutex, NULL); | |
abbca718 LOK |
41 | } |
42 | ||
43 | CMutex::~CMutex(void) | |
44 | { | |
abbca718 LOK |
45 | pthread_mutex_destroy(&m_mutex); |
46 | } | |
47 | ||
60fa4578 | 48 | bool CMutex::TryLock(void) |
abbca718 | 49 | { |
60fa4578 | 50 | return (pthread_mutex_trylock(&m_mutex) == 0); |
abbca718 LOK |
51 | } |
52 | ||
53 | bool CMutex::Lock(void) | |
54 | { | |
60fa4578 | 55 | return (pthread_mutex_lock(&m_mutex) == 0); |
abbca718 LOK |
56 | } |
57 | ||
58 | void CMutex::Unlock(void) | |
59 | { | |
60 | pthread_mutex_unlock(&m_mutex); | |
abbca718 LOK |
61 | } |
62 | ||
60fa4578 LOK |
63 | CLockObject::CLockObject(CMutex *mutex) : |
64 | m_mutex(mutex) | |
abbca718 | 65 | { |
5559c36e LOK |
66 | if (m_mutex) |
67 | m_mutex->Lock(); | |
abbca718 LOK |
68 | } |
69 | ||
70 | CLockObject::~CLockObject(void) | |
a8f0bd18 LOK |
71 | { |
72 | Leave(); | |
73 | m_mutex = NULL; | |
74 | } | |
75 | ||
76 | void CLockObject::Leave(void) | |
abbca718 | 77 | { |
5559c36e LOK |
78 | if (m_mutex) |
79 | m_mutex->Unlock(); | |
a8f0bd18 LOK |
80 | } |
81 | ||
82 | void CLockObject::Lock(void) | |
83 | { | |
5559c36e LOK |
84 | if (m_mutex) |
85 | m_mutex->Lock(); | |
abbca718 LOK |
86 | } |
87 | ||
88 | CCondition::CCondition(void) | |
89 | { | |
90 | pthread_cond_init(&m_cond, NULL); | |
abbca718 LOK |
91 | } |
92 | ||
93 | CCondition::~CCondition(void) | |
94 | { | |
95 | pthread_cond_broadcast(&m_cond); | |
96 | pthread_cond_destroy(&m_cond); | |
97 | } | |
98 | ||
5559c36e | 99 | void CCondition::Broadcast(void) |
abbca718 LOK |
100 | { |
101 | pthread_cond_broadcast(&m_cond); | |
102 | } | |
103 | ||
5559c36e LOK |
104 | void CCondition::Signal(void) |
105 | { | |
106 | pthread_cond_signal(&m_cond); | |
107 | } | |
108 | ||
abbca718 LOK |
109 | bool CCondition::Wait(CMutex *mutex, int64_t iTimeout) |
110 | { | |
60fa4578 | 111 | bool bReturn(false); |
5559c36e LOK |
112 | sched_yield(); |
113 | if (mutex) | |
abbca718 | 114 | { |
5559c36e LOK |
115 | struct timespec abstime; |
116 | struct timeval now; | |
117 | if (gettimeofday(&now, NULL) == 0) | |
118 | { | |
119 | iTimeout += now.tv_usec / 1000; | |
120 | abstime.tv_sec = now.tv_sec + (time_t)(iTimeout / 1000); | |
121 | abstime.tv_nsec = (long)((iTimeout % (unsigned long)1000) * (unsigned long)1000000); | |
122 | bReturn = (pthread_cond_timedwait(&m_cond, &mutex->m_mutex, &abstime) == 0); | |
123 | } | |
abbca718 LOK |
124 | } |
125 | ||
abbca718 LOK |
126 | return bReturn; |
127 | } | |
128 | ||
5559c36e | 129 | void CCondition::Sleep(int64_t iTimeout) |
abbca718 | 130 | { |
abbca718 LOK |
131 | CCondition w; |
132 | CMutex m; | |
60fa4578 | 133 | CLockObject lock(&m); |
5559c36e | 134 | w.Wait(&m, iTimeout); |
abbca718 | 135 | } |
60fa4578 LOK |
136 | |
137 | CThread::CThread(void) : | |
138 | m_bRunning(false), | |
139 | m_bStop(false) | |
140 | { | |
141 | } | |
142 | ||
143 | CThread::~CThread(void) | |
144 | { | |
145 | m_bStop = true; | |
5559c36e | 146 | m_threadCondition.Broadcast(); |
60fa4578 LOK |
147 | pthread_join(m_thread, NULL); |
148 | } | |
149 | ||
150 | bool CThread::CreateThread(void) | |
151 | { | |
152 | bool bReturn(false); | |
153 | ||
5559c36e LOK |
154 | CLockObject lock(&m_threadMutex); |
155 | m_bStop = false; | |
60fa4578 LOK |
156 | if (!m_bRunning && pthread_create(&m_thread, NULL, (void *(*) (void *))&CThread::ThreadHandler, (void *)this) == 0) |
157 | { | |
158 | m_bRunning = true; | |
60fa4578 LOK |
159 | bReturn = true; |
160 | } | |
161 | ||
162 | return bReturn; | |
163 | } | |
164 | ||
165 | void *CThread::ThreadHandler(CThread *thread) | |
166 | { | |
5559c36e LOK |
167 | void *retVal = NULL; |
168 | ||
60fa4578 | 169 | if (thread) |
5559c36e LOK |
170 | retVal = thread->Process(); |
171 | thread->m_bRunning = false; | |
172 | ||
173 | return retVal; | |
60fa4578 LOK |
174 | } |
175 | ||
5559c36e | 176 | bool CThread::StopThread(bool bWaitForExit /* = true */) |
60fa4578 | 177 | { |
5559c36e | 178 | bool bReturn(false); |
60fa4578 | 179 | m_bStop = true; |
5559c36e LOK |
180 | |
181 | m_threadCondition.Broadcast(); | |
182 | void *retVal; | |
60fa4578 | 183 | if (bWaitForExit) |
5559c36e LOK |
184 | bReturn = (pthread_join(m_thread, &retVal) == 0); |
185 | ||
186 | return bReturn; | |
187 | } | |
188 | ||
189 | bool CThread::Sleep(uint64_t iTimeout) | |
190 | { | |
191 | CLockObject lock(&m_threadMutex); | |
192 | return m_bStop ? false :m_threadCondition.Wait(&m_threadMutex, iTimeout); | |
60fa4578 | 193 | } |