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39
40#include "qtestsupport_core.h"
41
42#ifdef Q_OS_WIN
43#include <qt_windows.h>
44#endif
45
46QT_BEGIN_NAMESPACE
47
48Q_CORE_EXPORT void QTestPrivate::qSleep(int ms)
49{
50 Q_ASSERT(ms > 0);
51
52#if defined(Q_OS_WINRT)
53 WaitForSingleObjectEx(GetCurrentThread(), ms, true);
54#elif defined(Q_OS_WIN)
55 Sleep(uint(ms));
56#else
57 struct timespec ts = { .tv_sec: time_t(ms / 1000), .tv_nsec: (ms % 1000) * 1000 * 1000 };
58 nanosleep(requested_time: &ts, remaining: nullptr);
59#endif
60}
61
62/*! \fn template <typename Functor> bool QTest::qWaitFor(Functor predicate, int timeout)
63
64 Waits for \a timeout milliseconds or until the \a predicate returns true.
65
66 Returns \c true if the \a predicate returned true at any point, otherwise returns \c false.
67
68 Example:
69
70 \snippet code/src_corelib_kernel_qtestsupport_core_snippet.cpp 0
71
72 The code above will wait for the object to become ready, for a
73 maximum of three seconds.
74
75 \since 5.10
76*/
77
78
79/*! \fn void QTest::qWait(int ms)
80
81 Waits for \a ms milliseconds. While waiting, events will be processed and
82 your test will stay responsive to user interface events or network communication.
83
84 Example:
85
86 \snippet code/src_corelib_kernel_qtestsupport_core.cpp 1
87
88 The code above will wait until the network server is responding for a
89 maximum of about 12.5 seconds.
90
91 \sa QTest::qSleep(), QSignalSpy::wait()
92*/
93Q_CORE_EXPORT void QTest::qWait(int ms)
94{
95 // Ideally this method would be implemented in terms of qWaitFor, with
96 // a predicate that always returns false, but due to a compiler bug in
97 // GCC 6 we can't do that.
98
99 Q_ASSERT(QCoreApplication::instance());
100
101 QDeadlineTimer timer(ms, Qt::PreciseTimer);
102 int remaining = ms;
103 do {
104 QCoreApplication::processEvents(flags: QEventLoop::AllEvents, maxtime: remaining);
105 QCoreApplication::sendPostedEvents(receiver: nullptr, event_type: QEvent::DeferredDelete);
106 remaining = timer.remainingTime();
107 if (remaining <= 0)
108 break;
109 QTestPrivate::qSleep(ms: qMin(a: 10, b: remaining));
110 remaining = timer.remainingTime();
111 } while (remaining > 0);
112}
113
114QT_END_NAMESPACE
115

source code of qtbase/src/corelib/kernel/qtestsupport_core.cpp