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#include <windows.h>

#include "qmutex.h"
#include <qatomic.h>
#include "qmutex_p.h"

QT_BEGIN_NAMESPACE

QMutexPrivate::QMutexPrivate(QMutex::RecursionMode mode)
    : recursive(mode == QMutex::Recursive), contenders(0), lastSpinCount(0), owner(0), count(0)
{
    if (QSysInfo::WindowsVersion == 0) {
        // mutex was created before initializing WindowsVersion. this
        // can happen when creating the resource file engine handler,
        // for example. try again with just the A version
#ifdef Q_OS_WINCE
        event = CreateEventW(0, FALSE, FALSE, 0);
#else
        event = CreateEventA(0, FALSE, FALSE, 0);
#endif
    } else {
        event = QT_WA_INLINE(CreateEventW(0, FALSE, FALSE, 0),
                             CreateEventA(0, FALSE, FALSE, 0));
    }
    if (!event)
        qWarning("QMutexPrivate::QMutexPrivate: Cannot create event");
}

QMutexPrivate::~QMutexPrivate()
{ CloseHandle(event); }

bool QMutexPrivate::wait(int timeout)
{
    return WaitForSingleObject(event, timeout < 0 ? INFINITE : timeout) ==  WAIT_OBJECT_0;
}

void QMutexPrivate::wakeUp()
{ SetEvent(event); }

QT_END_NAMESPACE