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Mutex.h
1 /*
2  * This library is free software; you can redistribute it and/or
3  * modify it under the terms of the GNU Lesser General Public
4  * License as published by the Free Software Foundation; either
5  * version 2.1 of the License, or (at your option) any later version.
6  *
7  * This library is distributed in the hope that it will be useful,
8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
10  * Lesser General Public License for more details.
11  *
12  * You should have received a copy of the GNU Lesser General Public
13  * License along with this library; if not, write to the Free Software
14  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
15  *
16  * Mutex.h
17  * A thread object.
18  * Copyright (C) 2010 Simon Newton
19  */
20 
21 #ifndef INCLUDE_OLA_THREAD_MUTEX_H_
22 #define INCLUDE_OLA_THREAD_MUTEX_H_
23 
24 #include <pthread.h>
25 #include <ola/Clock.h>
26 #include <ola/base/Macro.h>
27 
28 namespace ola {
29 namespace thread {
30 
31 
35 class Mutex {
36  public:
37  friend class ConditionVariable;
38 
39  Mutex();
40  ~Mutex();
41 
42  void Lock();
43  bool TryLock();
44  void Unlock();
45 
46  private:
47  pthread_mutex_t m_mutex;
48 
50 };
51 
52 
57 class MutexLocker {
58  public:
59  explicit MutexLocker(Mutex *mutex);
60  ~MutexLocker();
61 
62  private:
63  Mutex *m_mutex;
64 
65  DISALLOW_COPY_AND_ASSIGN(MutexLocker);
66 };
67 
68 
73  public:
76 
77  void Wait(Mutex *mutex);
78  bool TimedWait(Mutex *mutex, const ola::TimeStamp &wake_up_time);
79 
80  void Signal();
81  void Broadcast();
82 
83  private:
84  pthread_cond_t m_condition;
85 
86  DISALLOW_COPY_AND_ASSIGN(ConditionVariable);
87 };
88 } // namespace thread
89 } // namespace ola
90 #endif // INCLUDE_OLA_THREAD_MUTEX_H_