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** This file is part of the QtTest module of the Qt Toolkit.
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** Alternatively, this file may be used under the terms of the GNU
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#include "qtestsupport_core.h"

#ifdef Q_OS_WIN
#include <qt_windows.h>
#endif

QT_BEGIN_NAMESPACE

Q_CORE_EXPORT void QTestPrivate::qSleep(int ms)
{
    Q_ASSERT(ms > 0);

#if defined(Q_OS_WINRT)
    WaitForSingleObjectEx(GetCurrentThread(), ms, true);
#elif defined(Q_OS_WIN)
    Sleep(uint(ms));
#else
    struct timespec ts = { time_t(ms / 1000), (ms % 1000) * 1000 * 1000 };
    nanosleep(&ts, NULL);
#endif
}

/*! \fn template <typename Functor> bool qWaitFor(Functor predicate, int timeout)
    \relates QTest

    Waits for \a timeout milliseconds or until the \a predicate returns true.

    Returns \c true if the \a predicate returned true at any point, otherwise returns \c false.

    Example:

    \snippet code/src_corelib_kernel_qtestsupport_core.cpp 0

    The code above will wait for the object to become ready, for a
    maximum of three seconds.

    \since 5.10
*/


/*! \fn void qWait(int ms)
    \relates QTest

    Waits for \a ms milliseconds. While waiting, events will be processed and
    your test will stay responsive to user interface events or network communication.

    Example:

    \snippet code/src_corelib_kernel_qtestsupport_core.cpp 1

    The code above will wait until the network server is responding for a
    maximum of about 12.5 seconds.

    \sa QTest::qSleep(), QSignalSpy::wait()
*/
Q_CORE_EXPORT void QTest::qWait(int ms)
{
    // Ideally this method would be implemented in terms of qWaitFor, with
    // a predicate that always returns false, but due to a compiler bug in
    // GCC 6 we can't do that.

    Q_ASSERT(QCoreApplication::instance());

    QDeadlineTimer timer(ms, Qt::PreciseTimer);
    int remaining = ms;
    do {
        QCoreApplication::processEvents(QEventLoop::AllEvents, remaining);
        QCoreApplication::sendPostedEvents(Q_NULLPTR, QEvent::DeferredDelete);
        remaining = timer.remainingTime();
        if (remaining <= 0)
            break;
        QTestPrivate::qSleep(qMin(10, remaining));
        remaining = timer.remainingTime();
    } while (remaining > 0);
}

QT_END_NAMESPACE
