From cd33d38ce0067719b0215264a22685a91b2e08dc Mon Sep 17 00:00:00 2001
From: Thiago Macieira <thiago.macieira@nokia.com>
Date: Thu, 18 Feb 2010 18:27:45 +0100
Subject: Port QtCore uses of QTime as a stopwatch to QTimestamp.

tst_qtimeline improvement: from 56187446 to 53915928 (callgrind)
---
 src/corelib/animation/qabstractanimation.cpp |  1 +
 src/corelib/animation/qabstractanimation_p.h | 57 +---------------------------
 src/corelib/io/qprocess.cpp                  |  6 +--
 src/corelib/io/qprocess_unix.cpp             |  8 ++--
 src/corelib/kernel/qcoreapplication.cpp      |  4 +-
 src/corelib/tools/qtimeline.cpp              |  4 +-
 6 files changed, 14 insertions(+), 66 deletions(-)

diff --git a/src/corelib/animation/qabstractanimation.cpp b/src/corelib/animation/qabstractanimation.cpp
index f834a80..82b3003 100644
--- a/src/corelib/animation/qabstractanimation.cpp
+++ b/src/corelib/animation/qabstractanimation.cpp
@@ -170,6 +170,7 @@ QUnifiedTimer::QUnifiedTimer() :
     currentAnimationIdx(0), consistentTiming(false), slowMode(false),
     isPauseTimerActive(false), runningLeafAnimations(0)
 {
+    time.invalidate();
 }
 
 QUnifiedTimer *QUnifiedTimer::instance()
diff --git a/src/corelib/animation/qabstractanimation_p.h b/src/corelib/animation/qabstractanimation_p.h
index 8bc3224..3eb4948 100644
--- a/src/corelib/animation/qabstractanimation_p.h
+++ b/src/corelib/animation/qabstractanimation_p.h
@@ -56,6 +56,7 @@
 #include <QtCore/qbasictimer.h>
 #include <QtCore/qdatetime.h>
 #include <QtCore/qtimer.h>
+#include <QtCore/qtimestamp.h>
 #include <private/qobject_p.h>
 
 #ifdef Q_OS_WIN
@@ -113,61 +114,7 @@ private:
     Q_DECLARE_PUBLIC(QAbstractAnimation)
 };
 
-class ElapsedTimer
-{
-public:
-    ElapsedTimer() {
-        invalidate();
-    }
-
-    void invalidate() {
-        m_started = -1;
-    }
-
-    bool isValid() const {
-        return m_started >= 0;
-    }
-
-    void start() {
-        m_started = getTickCount_sys();
-    }
-
-    qint64 elapsed() const {
-        qint64 current = getTickCount_sys();
-        qint64 delta = current - m_started;
-        if (delta < 0)
-            delta += getPeriod_sys();   //we wrapped around
-        return delta;
-    }
-
-private:
-    enum {
-        MSECS_PER_HOUR = 3600000,
-        MSECS_PER_MIN = 60000
-    };
-
-    qint64 m_started;
-
-    quint64 getPeriod_sys() const {
-#ifdef Q_OS_WIN
-        return Q_UINT64_C(0x100000000);
-#else
-        // fallback
-        return 86400 * 1000;
-#endif
-    }
-
-    qint64 getTickCount_sys() const {
-#ifdef Q_OS_WIN
-        return ::GetTickCount();
-#else
-        // fallback
-        const QTime t = QTime::currentTime();
-        return MSECS_PER_HOUR * t.hour() + MSECS_PER_MIN * t.minute() + 1000 * t.second() + t.msec();
-#endif
-    }
-};
-
+typedef QTimestamp ElapsedTimer;
 
 class QUnifiedTimer : public QObject
 {
diff --git a/src/corelib/io/qprocess.cpp b/src/corelib/io/qprocess.cpp
index 12a992a..6250094 100644
--- a/src/corelib/io/qprocess.cpp
+++ b/src/corelib/io/qprocess.cpp
@@ -88,7 +88,7 @@ QT_END_NAMESPACE
 #include "qprocess_p.h"
 
 #include <qbytearray.h>
-#include <qdatetime.h>
+#include <qtimestamp.h>
 #include <qcoreapplication.h>
 #include <qsocketnotifier.h>
 #include <qtimer.h>
@@ -1639,7 +1639,7 @@ bool QProcess::waitForBytesWritten(int msecs)
     if (d->processState == QProcess::NotRunning)
         return false;
     if (d->processState == QProcess::Starting) {
-        QTime stopWatch;
+        QTimestamp stopWatch;
         stopWatch.start();
         bool started = waitForStarted(msecs);
         if (!started)
@@ -1676,7 +1676,7 @@ bool QProcess::waitForFinished(int msecs)
     if (d->processState == QProcess::NotRunning)
         return false;
     if (d->processState == QProcess::Starting) {
-        QTime stopWatch;
+        QTimestamp stopWatch;
         stopWatch.start();
         bool started = waitForStarted(msecs);
         if (!started)
diff --git a/src/corelib/io/qprocess_unix.cpp b/src/corelib/io/qprocess_unix.cpp
index 5119ec0..511154a 100644
--- a/src/corelib/io/qprocess_unix.cpp
+++ b/src/corelib/io/qprocess_unix.cpp
@@ -92,7 +92,6 @@ QT_END_NAMESPACE
 
 #include <private/qcoreapplication_p.h>
 #include <private/qthread_p.h>
-#include <qdatetime.h>
 #include <qfile.h>
 #include <qfileinfo.h>
 #include <qlist.h>
@@ -101,6 +100,7 @@ QT_END_NAMESPACE
 #include <qsemaphore.h>
 #include <qsocketnotifier.h>
 #include <qthread.h>
+#include <qtimestamp.h>
 
 #include <errno.h>
 #include <stdlib.h>
@@ -933,7 +933,7 @@ bool QProcessPrivate::waitForReadyRead(int msecs)
     qDebug("QProcessPrivate::waitForReadyRead(%d)", msecs);
 #endif
 
-    QTime stopWatch;
+    QTimestamp stopWatch;
     stopWatch.start();
 
     forever {
@@ -1005,7 +1005,7 @@ bool QProcessPrivate::waitForBytesWritten(int msecs)
     qDebug("QProcessPrivate::waitForBytesWritten(%d)", msecs);
 #endif
 
-    QTime stopWatch;
+    QTimestamp stopWatch;
     stopWatch.start();
 
     while (!writeBuffer.isEmpty()) {
@@ -1072,7 +1072,7 @@ bool QProcessPrivate::waitForFinished(int msecs)
     qDebug("QProcessPrivate::waitForFinished(%d)", msecs);
 #endif
 
-    QTime stopWatch;
+    QTimestamp stopWatch;
     stopWatch.start();
 
     forever {
diff --git a/src/corelib/kernel/qcoreapplication.cpp b/src/corelib/kernel/qcoreapplication.cpp
index 2da5a7d..3d6364b 100644
--- a/src/corelib/kernel/qcoreapplication.cpp
+++ b/src/corelib/kernel/qcoreapplication.cpp
@@ -47,7 +47,6 @@
 #include "qeventloop.h"
 #include "qcorecmdlineargs_p.h"
 #include <qdatastream.h>
-#include <qdatetime.h>
 #include <qdebug.h>
 #include <qdir.h>
 #include <qfile.h>
@@ -59,6 +58,7 @@
 #include <qthreadpool.h>
 #include <qthreadstorage.h>
 #include <private/qthread_p.h>
+#include <qtimestamp.h>
 #include <qlibraryinfo.h>
 #include <qvarlengtharray.h>
 #include <private/qfactoryloader_p.h>
@@ -917,7 +917,7 @@ void QCoreApplication::processEvents(QEventLoop::ProcessEventsFlags flags, int m
     QThreadData *data = QThreadData::current();
     if (!data->eventDispatcher)
         return;
-    QTime start;
+    QTimestamp start;
     start.start();
     if (flags & QEventLoop::DeferredDeletion)
         QCoreApplication::sendPostedEvents(0, QEvent::DeferredDelete);
diff --git a/src/corelib/tools/qtimeline.cpp b/src/corelib/tools/qtimeline.cpp
index 877a77a..57977bc 100644
--- a/src/corelib/tools/qtimeline.cpp
+++ b/src/corelib/tools/qtimeline.cpp
@@ -42,9 +42,9 @@
 #include "qtimeline.h"
 
 #include <private/qobject_p.h>
-#include <QtCore/qdatetime.h>
 #include <QtCore/qcoreevent.h>
 #include <QtCore/qmath.h>
+#include <QtCore/qtimestamp.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -70,7 +70,7 @@ public:
 
     int currentTime;
     int timerId;
-    QTime timer;
+    QTimestamp timer;
 
     QTimeLine::Direction direction;
     QEasingCurve easingCurve;
-- 
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