1/****************************************************************************
2**
3** Copyright (C) 2019 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Marc Mutz <marc.mutz@kdab.com>
4** Contact: http://www.qt.io/licensing/
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38****************************************************************************/
39#ifndef QWAITCONDITION_P_H
40#define QWAITCONDITION_P_H
41
42//
43// W A R N I N G
44// -------------
45//
46// This file is not part of the Qt API. It exists for the convenience
47// of qmutex.cpp, qmutex_unix.cpp, and qmutex_win.cpp. This header
48// file may change from version to version without notice, or even be
49// removed.
50//
51// We mean it.
52//
53
54#include <QtCore/QWaitCondition>
55#include <QtCore/QMutex>
56#include <QtCore/QDeadlineTimer>
57
58#include <condition_variable>
59#include <mutex>
60
61QT_BEGIN_NAMESPACE
62
63namespace QtPrivate {
64
65#if defined(Q_OS_INTEGRITY)
66
67class condition_variable;
68
69class mutex : private QMutex
70{
71 friend class QtPrivate::condition_variable;
72
73public:
74 // all special member functions are ok!
75 // do not expose the (QMutex::Recursive) ctor
76 // don't use 'using QMutex::lock;' etc as those have the wrong noexcept
77
78 void lock() { return QMutex::lock(); }
79 void unlock() { return QMutex::unlock(); }
80 bool try_lock() { return QMutex::tryLock(); }
81};
82
83class condition_variable : private QWaitCondition
84{
85public:
86 // all special member functions are ok!
87
88 void notify_one() { QWaitCondition::wakeOne(); }
89 void notify_all() { QWaitCondition::wakeAll(); }
90
91 void wait(std::unique_lock<QtPrivate::mutex> &lock) { QWaitCondition::wait(lock.mutex()); }
92 template <class Predicate>
93 void wait(std::unique_lock<QtPrivate::mutex> &lock, Predicate p)
94 {
95 while (!p())
96 wait(lock);
97 }
98
99 template <typename Rep, typename Period>
100 std::cv_status wait_for(std::unique_lock<QtPrivate::mutex> &lock,
101 const std::chrono::duration<Rep, Period> &d)
102 {
103 return QWaitCondition::wait(lock.mutex(), QDeadlineTimer{d})
104 ? std::cv_status::no_timeout
105 : std::cv_status::timeout;
106 }
107 template <typename Rep, typename Period, typename Predicate>
108 bool wait_for(std::unique_lock<QtPrivate::mutex> &lock,
109 const std::chrono::duration<Rep, Period> &d, Predicate p)
110 {
111 const auto timer = QDeadlineTimer{d};
112 while (!p()) {
113 if (!QWaitCondition::wait(lock.mutex(), timer))
114 return p();
115 }
116 return true;
117 }
118
119 template <typename Clock, typename Duration>
120 std::cv_status wait_until(std::unique_lock<QtPrivate::mutex> &lock,
121 const std::chrono::time_point<Clock, Duration> &t)
122 {
123 return QWaitCondition::wait(lock.mutex(), QDeadlineTimer{t})
124 ? std::cv_status::no_timeout
125 : std::cv_status::timeout;
126 }
127
128 template <typename Clock, typename Duration, typename Predicate>
129 bool wait_until(std::unique_lock<QtPrivate::mutex> &lock,
130 const std::chrono::time_point<Clock, Duration> &t, Predicate p)
131 {
132 const auto timer = QDeadlineTimer{t};
133 while (!p()) {
134 if (!QWaitCondition::wait(lock.mutex(), timer))
135 return p();
136 }
137 return true;
138 }
139
140};
141
142#else // Integrity
143
144using mutex = std::mutex;
145using condition_variable = std::condition_variable;
146
147#endif // Integrity
148
149} // namespace QtPrivate
150
151QT_END_NAMESPACE
152
153#endif /* QWAITCONDITION_P_H */
154