cec: refactored threading/locking - added windows native instead of pthread-win32...
[deb_libcec.git] / src / lib / platform / threads / mutex.h
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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
34namespace PLATFORM
35{
36 class PreventCopy
37 {
38 public:
39 inline PreventCopy(void) {}
40 inline ~PreventCopy(void) {}
41
42 private:
43 inline PreventCopy(const PreventCopy &c) { *this = c; }
44 inline PreventCopy &operator=(const PreventCopy &c){ *this = c; return *this; }
45 };
46
47 class CCondition;
48
49 class CMutex : public PreventCopy
50 {
51 friend class CCondition;
52 public:
53 inline CMutex(void) :
54 m_iLockCount(0)
55 {
56 MutexCreate(m_mutex);
57 }
58
59 inline ~CMutex(void)
60 {
61 Clear();
62 MutexDelete(m_mutex);
63 }
64
65 inline bool TryLock(void)
66 {
67 if (MutexTryLock(m_mutex))
68 {
69 ++m_iLockCount;
70 return true;
71 }
72 return false;
73 }
74
75 inline bool Lock(void)
76 {
77 MutexLock(m_mutex);
78 ++m_iLockCount;
79 return true;
80 }
81
82 inline void Unlock(void)
83 {
84 --m_iLockCount;
85 MutexUnlock(m_mutex);
86 }
87
88 inline bool Clear(void)
89 {
90 bool bReturn(false);
91 if (TryLock())
92 {
93 unsigned int iLockCount = m_iLockCount;
94 for (unsigned int iPtr = 0; iPtr < iLockCount; iPtr++)
95 Unlock();
96 bReturn = true;
97 }
98 return bReturn;
99 }
100
101 private:
102 mutex_t m_mutex;
103 unsigned int m_iLockCount;
104 };
105
106 class CLockObject : public PreventCopy
107 {
108 public:
109 inline CLockObject(CMutex &mutex, bool bClearOnExit = false) :
110 m_mutex(mutex),
111 m_bClearOnExit(bClearOnExit)
112 {
113 m_mutex.Lock();
114 }
115
116 inline ~CLockObject(void)
117 {
118 if (m_bClearOnExit)
119 Clear();
120 else
121 Unlock();
122 }
123
124 inline bool TryLock(void)
125 {
126 return m_mutex.TryLock();
127 }
128
129 inline void Unlock(void)
130 {
131 m_mutex.Unlock();
132 }
133
134 inline bool Clear(void)
135 {
136 return m_mutex.Clear();
137 }
138
139 inline bool Lock(void)
140 {
141 return m_mutex.Lock();
142 }
143
144 private:
145 CMutex &m_mutex;
146 bool m_bClearOnExit;
147 };
148
149 class CCondition : public PreventCopy
150 {
151 public:
152 inline CCondition(void)
153 {
154 ConditionCreate(m_condition);
155 }
156
157 inline ~CCondition(void)
158 {
159 Broadcast();
160 ConditionDelete(m_condition);
161 }
162
163 inline void Broadcast(void)
164 {
165 ConditionBroadcast(m_condition);
166 }
167
168 inline void Signal(void)
169 {
170 ConditionSignal(m_condition);
171 }
172
173 inline bool Wait(CMutex &mutex, uint32_t iTimeout = 0)
174 {
175 return ConditionWait(m_condition, mutex.m_mutex, iTimeout);
176 }
177
178 static void Sleep(uint32_t iTimeout)
179 {
180 CCondition w;
181 CMutex m;
182 CLockObject lock(m);
183 w.Wait(m, iTimeout);
184 }
185
186 condition_t m_condition;
187 };
188}