--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/location/qgeoinfothread_wince.cpp Wed Aug 25 15:49:42 2010 +0300
@@ -0,0 +1,409 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Mobility Components.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QMetaType>
+
+#include "qgeoinfothread_wince_p.h"
+
+Q_DECLARE_METATYPE(GPS_POSITION);
+
+QTM_BEGIN_NAMESPACE
+
+// ========== QGeoInfoValidator ==========
+
+QGeoInfoValidator::QGeoInfoValidator() {}
+
+QGeoInfoValidator::~QGeoInfoValidator() {}
+
+// ========== QGeoInfoThreadWinCE ==========
+
+
+// This QGeoInfoThreadWinCE instance takes ownership of the validator, and must delete it before
+// it is destructed.
+QGeoInfoThreadWinCE::QGeoInfoThreadWinCE(QGeoInfoValidator *validator, bool timeoutsForPeriodicUpdates, QObject *parent)
+ : QThread(parent),
+ validator(validator),
+ timeoutsForPeriodicUpdates(timeoutsForPeriodicUpdates),
+ requestScheduled(false),
+ requestInterval(0),
+ updatesScheduled(false),
+ updatesInterval(0),
+ stopping(false),
+ hasLastPosition(false),
+ invalidDataReceived(false),
+ updateTimeoutTriggered(false)
+{
+ qRegisterMetaType<GPS_POSITION>();
+ m_newDataEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
+ m_gpsStateChange = CreateEvent(NULL, FALSE, FALSE, NULL);
+ m_wakeUpEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
+}
+
+QGeoInfoThreadWinCE::~QGeoInfoThreadWinCE()
+{
+ // Let/make the thread finish...
+
+ mutex.lock();
+
+ updatesScheduled = false;
+ requestScheduled = false;
+ stopping = true;
+
+ mutex.unlock();
+
+ wakeUp();
+
+ wait();
+
+ // ...then clean up.
+
+ delete validator;
+
+ CloseHandle(m_newDataEvent);
+ CloseHandle(m_gpsStateChange);
+ CloseHandle(m_wakeUpEvent);
+}
+
+// TODO - just need to add the WinCE line from QTime::currentTime to QDateTime::currentDateTime
+// and we can scrap this method
+QDateTime QGeoInfoThreadWinCE::currentDateTime()
+{
+ QDate d = QDate::currentDate();
+ QTime t = QTime::currentTime();
+
+ // just in case we past midnight in between the last two calls
+ if (d != QDate::currentDate()) {
+ d = QDate::currentDate();
+ t = QTime::currentTime();
+ }
+
+ return QDateTime(d, t);
+}
+
+int QGeoInfoThreadWinCE::msecsTo(QDateTime from, QDateTime to)
+{
+ int MSECS_PER_DAY = 86400000;
+ return (from.date().daysTo(to.date()) * MSECS_PER_DAY) + from.time().msecsTo(to.time());
+}
+
+void QGeoInfoThreadWinCE::requestUpdate(int timeout)
+{
+ QMutexLocker locker(&mutex);
+
+ if (!requestScheduled) {
+ requestScheduled = true;
+
+ if (timeout == 0)
+ timeout = DefaultRequestTimeout;
+
+ requestInterval = timeout;
+ requestNextTime = currentDateTime().addMSecs(requestInterval);
+
+ locker.unlock();
+ wakeUp();
+ }
+}
+
+void QGeoInfoThreadWinCE::startUpdates()
+{
+ QMutexLocker locker(&mutex);
+ if (!updatesScheduled) {
+ updatesScheduled = true;
+ updateTimeoutTriggered = false;
+ hasLastPosition = false;
+
+ if (updatesInterval != 0)
+ updatesNextTime = currentDateTime().addMSecs(updatesInterval);
+
+ locker.unlock();
+ wakeUp();
+ }
+}
+
+void QGeoInfoThreadWinCE::stopUpdates()
+{
+ QMutexLocker locker(&mutex);
+ if (updatesScheduled) {
+ updatesScheduled = false;
+ locker.unlock();
+ wakeUp();
+ }
+}
+
+void QGeoInfoThreadWinCE::setUpdateInterval(int interval)
+{
+ QMutexLocker locker(&mutex);
+
+ if (interval == updatesInterval)
+ return;
+
+ int oldInterval = updatesInterval;
+ updatesInterval = interval;
+
+ if (updatesScheduled) {
+ QDateTime now = currentDateTime();
+
+ // The periodic update interval has been changed and updates are still ocurring.
+
+ if (oldInterval != 0) {
+ if (updatesInterval != 0) {
+ // If we are changing fixed intervals we update the scheduled time for the next
+ // periodic update, making sure that it is scheduled in the future.
+ updatesNextTime = updatesNextTime.addMSecs(updatesInterval - oldInterval);
+ while (msecsTo(now, updatesNextTime) < 0)
+ updatesNextTime = updatesNextTime.addMSecs(updatesInterval);
+ } else {
+ // If we now want to emit updates as the data arrives we invalidate the scheduled
+ // time for the next update, just to be on the safe side.
+ updatesNextTime = now;
+ }
+ } else {
+ // If we were previously emitting updates as the data arrived we set the scheduled time
+ // for the next periodic update.
+ updatesNextTime = now.addMSecs(updatesInterval);
+ }
+
+ locker.unlock();
+ wakeUp();
+ }
+}
+
+void QGeoInfoThreadWinCE::wakeUp()
+{
+ SetEvent(m_wakeUpEvent);
+ statusUpdated.wakeAll();
+}
+
+// We try to keep the GPS turned off as much as we can to preserve battery life.
+// When run() is called we turn on the GPS device and we leave it on
+// until the request is satisfied or periodic updates are stopped.
+// The methods requestUpdate() and startUpdates() will call start() if required.
+void QGeoInfoThreadWinCE::run()
+{
+ mutex.lock();
+ gpsReachedOnState = false;
+ m_gps = NULL;
+
+ const int handleCount = 3;
+ HANDLE handles[handleCount] = { m_newDataEvent, m_gpsStateChange, m_wakeUpEvent };
+
+ if (updatesScheduled || requestScheduled) {
+ m_gps = GPSOpenDevice(m_newDataEvent, m_gpsStateChange, NULL, 0);
+ }
+
+ while (true) {
+
+ if (stopping)
+ break;
+
+ if (!updatesScheduled && !requestScheduled) {
+ if (m_gps != NULL) {
+ GPSCloseDevice(m_gps);
+ m_gps = NULL;
+ }
+ statusUpdated.wait(&mutex);
+ if (updatesScheduled || requestScheduled) {
+ gpsReachedOnState = false;
+ m_gps = GPSOpenDevice(m_newDataEvent, m_gpsStateChange, NULL, 0);
+ }
+ }
+
+ // If the periodic update is 0 then updates are returned as available.
+ // If this is not the case then the next timeout will be set for whichever of
+ // the request and periodic updates that is due next.
+
+ // We cap the amount of time we spend waiting for updates.
+ DWORD timeout = MaximumMainLoopWaitTime;
+
+ QDateTime now = currentDateTime();
+
+ if (requestScheduled) {
+ if (!updatesScheduled || (updatesInterval == 0)
+ || (msecsTo(requestNextTime, updatesNextTime) >= 0)) {
+ timeout = msecsTo(now, requestNextTime) + 100;
+ } else {
+ if (updatesInterval != 0)
+ timeout = msecsTo(now, updatesNextTime) + 100;
+ }
+ } else {
+ // updatesScheduled has to be true or we wouldn't still be in the larger while loop.
+ if (updatesInterval != 0)
+ timeout = msecsTo(now, updatesNextTime) + 100;
+ }
+
+ if (timeout > MaximumMainLoopWaitTime)
+ timeout = MaximumMainLoopWaitTime;
+
+ mutex.unlock();
+ DWORD dwRet = WaitForMultipleObjects(handleCount, handles, FALSE, timeout);
+ mutex.lock();
+
+ // The GPS data has been updated.
+ if (dwRet == WAIT_OBJECT_0) {
+ // The other options are:
+ // dwRet == WAIT_OBJECT_0 + 1
+ // => The GPS state has been updated.
+ // dwRet == WAIT_OBJECT_0 + 2
+ // => We called QGeoInfoThreadWinCE::wakeUp().
+ // dwRet == WAIT_TIMEOUT
+ // => WaitForMultipleObjects() timed out.
+
+ GPS_POSITION posn;
+ posn.dwVersion = GPS_VERSION_1;
+ posn.dwSize = sizeof(posn);
+
+ dwRet = GPSGetPosition(m_gps, &posn, timeout, 0);
+
+ if (dwRet == ERROR_SUCCESS) {
+ if (!validator->valid(posn)) {
+ invalidDataReceived = true;
+ } else {
+ m_lastPosition = posn;
+ hasLastPosition = true;
+ updateTimeoutTriggered = false;
+
+ // A request and a periodic update could both be satisfied at once.
+ // We use this flag to prevent a double update.
+ bool emitDataUpdated = false;
+
+ // If a request is in process we emit the dataUpdated signal.
+ if (requestScheduled) {
+ emitDataUpdated = true;
+ requestScheduled = false;
+ }
+
+ // If we are updating as data becomes available or if the update period has elapsed
+ // we emit the dataUpdated signal.
+ if (updatesScheduled) {
+ QDateTime now = currentDateTime();
+ if (updatesInterval == 0) {
+ emitDataUpdated = true;
+ } else if (msecsTo(now, updatesNextTime) < 0) {
+ while (msecsTo(now, updatesNextTime) < 0)
+ updatesNextTime = updatesNextTime.addMSecs(updatesInterval);
+ emitDataUpdated = true;
+ }
+ }
+
+ if (emitDataUpdated) {
+ hasLastPosition = false;
+ mutex.unlock();
+ emit dataUpdated(m_lastPosition);
+ mutex.lock();
+ }
+ }
+ }
+ }
+ if (dwRet != WAIT_OBJECT_0 || invalidDataReceived) {
+ invalidDataReceived = false;
+
+ // Third party apps may have the ability to turn off the gps hardware independently of
+ // the Microsoft GPS API.
+ // This checks for an unexpected power down and turns the hardware back on.
+
+ // The GPS state has been updated.
+
+ if (dwRet == WAIT_OBJECT_0 + 1) {
+ GPS_DEVICE device;
+ device.dwVersion = GPS_VERSION_1;
+ device.dwSize = sizeof(device);
+
+ dwRet = GPSGetDeviceState(&device);
+
+ if (device.dwDeviceState == SERVICE_STATE_ON) {
+ gpsReachedOnState = true;
+ } else if ((device.dwDeviceState == SERVICE_STATE_OFF) && gpsReachedOnState) {
+ // We do not want to mess with devices that are slow starting up, so we only
+ // turn on devices that have previously reached the "On" state.
+ gpsReachedOnState = false;
+ m_gps = GPSOpenDevice(m_newDataEvent, m_gpsStateChange, NULL, 0);
+ }
+ }
+
+ // We reach this point if the gps state has changed, if the wake up event has been
+ // triggered, if we received data we were not interested in from the GPS,
+ // or if a timeout occurred while waiting for gps data.
+ //
+ // In all of these cases we should check for request and periodic update timeouts.
+
+ QDateTime now = currentDateTime();
+
+ bool emitUpdateTimeout = false;
+
+ // Check for request timeouts.
+ if (requestScheduled && msecsTo(now, requestNextTime) < 0) {
+ requestScheduled = false;
+ emitUpdateTimeout = true;
+ }
+
+ // Check to see if a periodic update is due.
+ if (updatesScheduled && updatesInterval != 0 && (msecsTo(now, updatesNextTime) < 0)) {
+ while (msecsTo(now, updatesNextTime) < 0)
+ updatesNextTime = updatesNextTime.addMSecs(updatesInterval);
+ if (hasLastPosition) {
+ hasLastPosition = false;
+ mutex.unlock();
+ emit dataUpdated(m_lastPosition);
+ mutex.lock();
+ } else {
+ if (timeoutsForPeriodicUpdates && !updateTimeoutTriggered) {
+ updateTimeoutTriggered = true;
+ emitUpdateTimeout = true;
+ }
+ }
+ }
+
+ if (emitUpdateTimeout) {
+ mutex.unlock();
+ emit updateTimeout();
+ mutex.lock();
+ }
+ }
+ }
+
+ if (m_gps != NULL)
+ GPSCloseDevice(m_gps);
+
+ mutex.unlock();
+}
+
+#include "moc_qgeoinfothread_wince_p.cpp"
+QTM_END_NAMESPACE