source: flair-src/trunk/lib/FlairCore/src/ConditionVariable.h

Last change on this file was 330, checked in by Sanahuja Guillaume, 2 years ago

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1// %flair:license{
2// This file is part of the Flair framework distributed under the
3// CECILL-C License, Version 1.0.
4// %flair:license}
5/*!
6 * \file ConditionVariable.h
7 * \brief Class defining a condition variable
8 * \author Guillaume Sanahuja, Copyright Heudiasyc UMR UTC/CNRS 7253
9 * \date 2014/02/07
10 * \version 4.0
11 */
12
13#ifndef CONDITIONVARIABLE_H
14#define CONDITIONVARIABLE_H
15
16#include <Mutex.h>
17
18class ConditionVariable_impl;
19
20namespace flair {
21namespace core {
22
23/*! \class ConditionVariable
24*
25* \brief Class defining a condition variable
26*
27*/
28
29class ConditionVariable : public Mutex {
30public:
31  /*!
32  * \brief Constructor
33  *
34  * Construct a condition variable with its associated mutex.
35  *
36  * \param parent parent
37  * \param name name
38  */
39  ConditionVariable(const Object *parent, std::string name);
40
41  /*!
42  * \brief Destructor
43  *
44  */
45  ~ConditionVariable();
46
47  /*!
48  * \brief Block on the condition variable
49  *
50  * This method must be called with mutex locked (see Mutex::GetMutex) by the
51  *calling thread or undefined behaviour will result. \n
52  * It atomically releases mutex and causes the calling thread to block on the
53  *condition variable. \n
54  * Only one thread can be blocked at the same time. \n
55  * Upon successful return, the mutex has been locked and is owned by the
56  *calling thread which should unlock it (see Mutex::ReleaseMutex).
57  *
58  * \param timeout timeout
59  * \return true if the condition variable is signaled before the tipeout specified
60  *  in parameter elapses or if timeout elapses, false otherwise
61  */
62  bool CondWait(Time timeout=TIME_INFINITE);
63
64  /*!
65  * \brief Block on the condition variable with a timeout
66  *
67  * This method must be called with mutex locked (see Mutex::GetMutex) by the
68  *calling thread or undefined behaviour will result. \n
69  * It atomically releases mutex and causes the calling thread to block on the
70  *condition variable. \n
71  * Only one thread can be blocked at the same time. \n
72  * Upon successful return, the mutex has been locked and is owned by the
73  *calling thread which should unlock it (see Mutex::ReleaseMutex).
74  *
75  * \param date absolute date
76  * \return true if the condition variable is signaled before the date specified
77  *in parameter elapses, false otherwise
78  */
79  bool CondWaitUntil(Time date);
80
81  /*!
82  * \brief Unblock threads blocked on the condition variable
83  *
84  * This method should be called with mutex locked (see Mutex::GetMutex) by the
85  *calling thread. \n
86  * In this case, upon return, the calling thread should unlock the mutex (see
87  *Mutex::ReleaseMutex).
88  *
89  */
90  void CondSignal(void);
91
92private:
93  class ConditionVariable_impl *pimpl_;
94};
95
96} // end namespace core
97} // end namespace flair
98
99#endif // CONDITIONVARIABLE_H
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