Move QElapsedTimer to src/corelib/kernel

It's really a kernel functionality, as it implements really low-level
functionality and it's used by the event dispatcher. It was in tools/
only because QTime is.

QDeadlineTimer is also coming to kernel/.

Change-Id: Ifea6e497f11a461db432ffff14491c6d9b839eb0
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

1 files changed, 95 insertions, 0 deletions

diff --git a/src/corelib/kernel/qelapsedtimer.h b/src/corelib/kernel/qelapsedtimer.h
new file mode 100644
index 0000000000..7954b41bf4
--- /dev/null
+++ b/src/corelib/kernel/qelapsedtimer.h
@@ -0,0 +1,95 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QELAPSEDTIMER_H
+#define QELAPSEDTIMER_H
+
+#include <QtCore/qglobal.h>
+
+QT_BEGIN_NAMESPACE
+
+
+class Q_CORE_EXPORT QElapsedTimer
+{
+public:
+    enum ClockType {
+        SystemTime,
+        MonotonicClock,
+        TickCounter,
+        MachAbsoluteTime,
+        PerformanceCounter
+    };
+
+    Q_DECL_CONSTEXPR QElapsedTimer()
+        : t1(Q_INT64_C(0x8000000000000000)),
+          t2(Q_INT64_C(0x8000000000000000))
+    {
+    }
+
+    static ClockType clockType() Q_DECL_NOTHROW;
+    static bool isMonotonic() Q_DECL_NOTHROW;
+
+    void start() Q_DECL_NOTHROW;
+    qint64 restart() Q_DECL_NOTHROW;
+    void invalidate() Q_DECL_NOTHROW;
+    bool isValid() const Q_DECL_NOTHROW;
+
+    qint64 nsecsElapsed() const Q_DECL_NOTHROW;
+    qint64 elapsed() const Q_DECL_NOTHROW;
+    bool hasExpired(qint64 timeout) const Q_DECL_NOTHROW;
+
+    qint64 msecsSinceReference() const Q_DECL_NOTHROW;
+    qint64 msecsTo(const QElapsedTimer &other) const Q_DECL_NOTHROW;
+    qint64 secsTo(const QElapsedTimer &other) const Q_DECL_NOTHROW;
+
+    bool operator==(const QElapsedTimer &other) const Q_DECL_NOTHROW
+    { return t1 == other.t1 && t2 == other.t2; }
+    bool operator!=(const QElapsedTimer &other) const Q_DECL_NOTHROW
+    { return !(*this == other); }
+
+    friend bool Q_CORE_EXPORT operator<(const QElapsedTimer &v1, const QElapsedTimer &v2) Q_DECL_NOTHROW;
+
+private:
+    qint64 t1;
+    qint64 t2;
+};
+
+QT_END_NAMESPACE
+
+#endif // QELAPSEDTIMER_H