From bdd165798c040f4ec0f464d7e822441e65c15a25 Mon Sep 17 00:00:00 2001
From: Jake Petroules <jake.petroules@qt.io>
Date: Mon, 10 Jul 2017 17:14:36 -0700
Subject: Use QDeadlineTimer to greatly simplify dummy plugin implementation

Change-Id: Ibda65cd63dcf277730044da04ee30b68513f95ee
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
---
 src/plugins/sensors/dummy/dummycommon.cpp | 79 +------------------------------
 1 file changed, 2 insertions(+), 77 deletions(-)

(limited to 'src/plugins')

diff --git a/src/plugins/sensors/dummy/dummycommon.cpp b/src/plugins/sensors/dummy/dummycommon.cpp
index e2a4a51f..4a19b13f 100644
--- a/src/plugins/sensors/dummy/dummycommon.cpp
+++ b/src/plugins/sensors/dummy/dummycommon.cpp
@@ -39,16 +39,7 @@
 
 #include "dummycommon.h"
 
-#ifdef Q_OS_WIN
-#include <QtCore/qt_windows.h>
-// WINCE has <time.h> but using clock() gives a link error because
-// the function isn't actually implemented.
-#else
-#include <time.h>
-#ifdef Q_OS_MAC
-#include <mach/mach_time.h>
-#endif
-#endif
+#include <QtCore/qdeadlinetimer.h>
 
 dummycommon::dummycommon(QSensor *sensor)
     : QSensorBackend(sensor)
@@ -89,74 +80,8 @@ void dummycommon::timerEvent(QTimerEvent * /*event*/)
     poll();
 }
 
-#ifdef Q_OS_MAC
-//taken from qelapsedtimer_mac.cpp
-static mach_timebase_info_data_t info = {0,0};
-static qint64 absoluteToNSecs(qint64 cpuTime)
-{
-    if (info.denom == 0)
-        mach_timebase_info(&info);
-    qint64 nsecs = cpuTime * info.numer / info.denom;
-    return nsecs;
-}
-#elif defined(Q_OS_WIN)
-// Obtain a time stamp from the performance counter,
-// default to tick count.
-static quint64 windowsTimeStamp()
-{
-    static bool hasFrequency =  false;
-    static quint64 frequency = 0;
-    if (!hasFrequency) {
-        LARGE_INTEGER frequencyLI;
-        hasFrequency = true;
-        QueryPerformanceFrequency(&frequencyLI);
-        frequency = frequencyLI.QuadPart;
-    }
-
-    if (frequency) { // Microseconds.
-        LARGE_INTEGER counterLI;
-        if (QueryPerformanceCounter(&counterLI))
-            return 1000000 * counterLI.QuadPart / frequency;
-    }
-#ifndef Q_OS_WINRT
-    return GetTickCount();
-#else
-    return GetTickCount64();
-#endif
-}
-#endif
-
 quint64 dummycommon::getTimestamp()
 {
-#if defined(Q_OS_WIN)
-    return windowsTimeStamp();
-#elif defined(Q_OS_WINCE)
-    //d This implementation is based on code found here:
-    // http://social.msdn.microsoft.com/Forums/en/vssmartdevicesnative/thread/74870c6c-76c5-454c-8533-812cfca585f8
-    HANDLE currentThread = GetCurrentThread();
-    FILETIME creationTime, exitTime, kernalTime, userTime;
-    GetThreadTimes(currentThread, &creationTime, &exitTime, &kernalTime, &userTime);
-
-    ULARGE_INTEGER uli;
-    uli.LowPart = userTime.dwLowDateTime;
-    uli.HighPart = userTime.dwHighDateTime;
-    ULONGLONG systemTimeInMS = uli.QuadPart/10000;
-    return static_cast<quint64>(systemTimeInMS);
-#elif defined(Q_OS_MAC)
-    uint64_t cpu_time = mach_absolute_time();
-    uint64_t nsecs = absoluteToNSecs(cpu_time);
-
-    quint64 result = (nsecs * 0.001); //scale to microseconds
-    return result;
-#else
-    struct timespec tv;
-    int ok;
-    ok = clock_gettime(CLOCK_MONOTONIC, &tv);
-    Q_ASSERT(ok == 0);
-    Q_UNUSED(ok);
-
-    quint64 result = (tv.tv_sec * 1000000ULL) + (tv.tv_nsec * 0.001); // scale to microseconds
-    return result;
-#endif
+    return QDeadlineTimer::current().deadlineNSecs() / 1000;
 }
 
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