Initial revision

1 files changed, 376 insertions, 0 deletions

diff --git a/library/alarmserver.cpp b/library/alarmserver.cpp
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+++ b/library/alarmserver.cpp
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+/**********************************************************************
+** Copyright (C) 2000 Trolltech AS.  All rights reserved.
+**
+** This file is part of Qtopia Environment.
+**
+** This file may be distributed and/or modified under the terms of the
+** GNU General Public License version 2 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.
+**
+** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+**
+** See http://www.trolltech.com/gpl/ for GPL licensing information.
+**
+** Contact info@trolltech.com if any conditions of this licensing are
+** not clear to you.
+**
+**********************************************************************/
+
+#include <qdir.h>
+#include <qfile.h>
+#include <qmessagebox.h>
+#include <qtextstream.h>
+
+
+#include "qpeapplication.h"
+#include "global.h"
+#include "resource.h"
+
+#if defined(Q_WS_QWS) && !defined(QT_NO_COP)
+#include "qcopenvelope_qws.h"
+#endif
+#include "alarmserver.h"
+#include <qpe/timeconversion.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <stdlib.h>
+#include <unistd.h>
+
+struct timerEventItem {
+    time_t UTCtime;
+    QCString channel, message;
+    int data;
+    bool operator==( const timerEventItem &right ) const
+    {
+        return ( UTCtime == right.UTCtime
+                 && channel == right.channel
+                 && message == right.message
+                 && data == right.data );
+    }
+};
+
+class TimerReceiverObject : public QObject
+{
+public:
+  TimerReceiverObject() { }
+  ~TimerReceiverObject() { }
+  void resetTimer();
+  void setTimerEventItem();
+  void deleteTimer();
+protected:
+  void timerEvent( QTimerEvent *te );
+private:
+    QString atfilename;
+};
+
+TimerReceiverObject *timerEventReceiver = NULL;
+QList<timerEventItem> timerEventList;
+timerEventItem *nearestTimerEvent = NULL;
+
+
+// set the timer to go off on the next event in the list
+void setNearestTimerEvent()
+{
+    nearestTimerEvent = NULL;
+    QListIterator<timerEventItem> it( timerEventList );
+    if ( *it )
+        nearestTimerEvent = *it;
+    for ( ; *it; ++it )
+        if ( (*it)->UTCtime < nearestTimerEvent->UTCtime )
+            nearestTimerEvent = *it;
+    if (nearestTimerEvent)
+        timerEventReceiver->resetTimer();
+    else
+        timerEventReceiver->deleteTimer();
+}
+
+
+//store current state to file
+//Simple implementation. Should run on a timer.
+
+static void saveState()
+{
+    QString savefilename = Global::applicationFileName( "AlarmServer", "saveFile" );
+    if ( timerEventList.isEmpty() ) {
+        unlink( savefilename );
+        return;
+    }
+
+    QFile savefile(savefilename+".new");
+    if ( savefile.open(IO_WriteOnly) ) {
+        QDataStream ds( &savefile );
+
+        //save
+
+        QListIterator<timerEventItem> it( timerEventList );
+        for ( ; *it; ++it ) {
+            ds << it.current()->UTCtime;
+            ds << it.current()->channel;
+            ds << it.current()->message;
+            ds << it.current()->data;
+        }
+
+
+        savefile.close();
+        unlink( savefilename );
+        QDir d; d.rename(savefilename+".new",savefilename);
+
+    }
+}
+
+/*!
+  Sets up the alarm server. Restoring to previous state (session management).
+ */
+void AlarmServer::initialize()
+{
+    //read autosave file and put events in timerEventList
+
+    QString savefilename = Global::applicationFileName( "AlarmServer", "saveFile" );
+
+    QFile savefile(savefilename);
+    if ( savefile.open(IO_ReadOnly) ) {
+        QDataStream ds( &savefile );
+        while ( !ds.atEnd() ) {
+            timerEventItem *newTimerEventItem = new timerEventItem;
+            ds >> newTimerEventItem->UTCtime;
+            ds >> newTimerEventItem->channel;
+            ds >> newTimerEventItem->message;
+            ds >> newTimerEventItem->data;
+            timerEventList.append( newTimerEventItem );
+        }
+        savefile.close();
+        if (!timerEventReceiver)
+            timerEventReceiver = new TimerReceiverObject;
+        setNearestTimerEvent();
+    }
+}
+
+
+
+
+static const char* atdir = "/var/spool/at/";
+
+static bool triggerAtd( bool writeHWClock = FALSE )
+{
+    QFile trigger(QString(atdir) + "trigger");
+    if ( trigger.open(IO_WriteOnly|IO_Raw) ) {
+
+        const char* data =
+#ifdef QT_QWS_CUSTOM
+        //custom atd only writes HW Clock if we write a 'W'
+            ( writeHWClock ) ? "W\n" :
+#endif
+            data = "\n";
+        int len = strlen(data);
+        int total_written = trigger.writeBlock(data,len);
+        if ( total_written != len ) {
+            QMessageBox::critical( 0, QObject::tr( "Out of Space" ),
+                                   QObject::tr( "Unable to schedule alarm.\nFree some memory and try again." ) );
+            trigger.close();
+            QFile::remove( trigger.name() );
+            return FALSE;
+        }
+        return TRUE;
+    }
+    return FALSE;
+}
+
+void TimerReceiverObject::deleteTimer()
+{
+    if ( !atfilename.isEmpty() ) {
+        unlink( atfilename );
+        atfilename = QString::null;
+        triggerAtd( FALSE );
+    }
+}
+
+void TimerReceiverObject::resetTimer()
+{
+    const int maxsecs = 2147000;
+    int total_written;
+    QDateTime nearest = TimeConversion::fromUTC(nearestTimerEvent->UTCtime);
+    QDateTime now = QDateTime::currentDateTime();
+    int secs = TimeConversion::secsTo( now, nearest );
+    if ( secs > maxsecs ) {
+        // too far for millisecond timing
+        secs = maxsecs;
+    }
+
+    // System timer (needed so that we wake from deep sleep),
+    // from the Epoch in seconds.
+    //
+    int at_secs = TimeConversion::toUTC(nearest);
+    // qDebug("reset timer to %d seconds from Epoch",at_secs);
+    QString fn = atdir + QString::number(at_secs) + "."
+                 + QString::number(getpid());
+    if ( fn != atfilename ) {
+        QFile atfile(fn+".new");
+        if ( atfile.open(IO_WriteOnly|IO_Raw) ) {
+            // just wake up and delete the at file
+            QString cmd = "#!/bin/sh\nrm " + fn;
+            total_written = atfile.writeBlock(cmd.latin1(),cmd.length());
+            if ( total_written != int(cmd.length()) ) {
+                QMessageBox::critical( 0, tr("Out of Space"),
+                                       tr("Unable to schedule alarm.\n"
+                                          "Please free up space and try again") );
+                atfile.close();
+                QFile::remove( atfile.name() );
+                return;
+            }
+            atfile.close();
+            unlink( atfilename );
+            QDir d; d.rename(fn+".new",fn);
+            chmod(fn.latin1(),0755);
+            atfilename = fn;
+            triggerAtd( FALSE );
+        } else {
+            qWarning("Cannot open atd file %s",fn.latin1());
+        }
+    }
+    // Qt timers (does the actual alarm)
+    // from now in milliseconds
+    //
+    qDebug("AlarmServer waiting %d seconds",secs);
+    startTimer( 1000 * secs + 500 );
+}
+
+void TimerReceiverObject::timerEvent( QTimerEvent * )
+{
+    bool needSave = FALSE;
+    killTimers();
+    if (nearestTimerEvent) {
+        if ( nearestTimerEvent->UTCtime
+             <= TimeConversion::toUTC(QDateTime::currentDateTime()) ) {
+            QCopEnvelope e( nearestTimerEvent->channel,
+                            nearestTimerEvent->message );
+            e << TimeConversion::fromUTC( nearestTimerEvent->UTCtime )
+              << nearestTimerEvent->data;
+            timerEventList.remove( nearestTimerEvent );
+            needSave = TRUE;
+        }
+        setNearestTimerEvent();
+    } else {
+        resetTimer();
+    }
+    if ( needSave )
+        saveState();
+}
+
+/*!
+  \class AlarmServer alarmserver.h
+  \brief The AlarmServer class provides alarms to be scheduled.
+
+  Applications which wish to be informed when a certain time instant
+  passes use the functions of AlarmServer to request so.
+*/
+
+/*!
+  Schedules an alarm for \a when. Soon after this time,
+  \a message will be sent to \a channel, with \a data as
+  a parameter. \a message must be of the form "someMessage(int)".
+
+  \sa deleteAlarm()
+*/
+void AlarmServer::addAlarm ( QDateTime when, const QCString& channel,
+                             const QCString& message, int data)
+{
+    if ( qApp->type() == QApplication::GuiServer ) {
+        bool needSave = FALSE;
+        // Here we are the server so either it has been directly called from
+        // within the server or it has been sent to us from a client via QCop
+        if (!timerEventReceiver)
+            timerEventReceiver = new TimerReceiverObject;
+
+        timerEventItem *newTimerEventItem = new timerEventItem;
+        newTimerEventItem->UTCtime = TimeConversion::toUTC( when );
+        newTimerEventItem->channel = channel;
+        newTimerEventItem->message = message;
+        newTimerEventItem->data = data;
+        // explore the case of already having the event in here...
+        QListIterator<timerEventItem> it( timerEventList );
+        for ( ; *it; ++it )
+            if ( *(*it) == *newTimerEventItem )
+                return;
+        // if we made it here, it is okay to add the item...
+        timerEventList.append( newTimerEventItem );
+        needSave = TRUE;
+        // quicker than using setNearestTimerEvent()
+        if ( nearestTimerEvent ) {
+            if (newTimerEventItem->UTCtime < nearestTimerEvent->UTCtime) {
+                nearestTimerEvent = newTimerEventItem;
+                timerEventReceiver->killTimers();
+                timerEventReceiver->resetTimer();
+            }
+        } else {
+            nearestTimerEvent = newTimerEventItem;
+            timerEventReceiver->resetTimer();
+        }
+        if ( needSave )
+            saveState();
+    } else {
+        QCopEnvelope e( "QPE/System", "addAlarm(QDateTime,QCString,QCString,int)" );
+        e << when << channel << message << data;
+    }
+}
+
+/*!
+  Deletes previously scheduled alarms which match \a when, \a channel, \a message,
+  and \a data.
+
+  Passing null values for \a when, \a channel, or \a message indicates "any".
+  Passing -1 for \a data indicates "any".
+
+  \sa deleteAlarm()
+*/
+void AlarmServer::deleteAlarm (QDateTime when, const QCString& channel, const QCString& message, int data)
+{
+    if ( qApp->type() == QApplication::GuiServer) {
+        bool needSave = FALSE;
+        if ( timerEventReceiver != NULL ) {
+            timerEventReceiver->killTimers();
+
+            // iterate over the list of events
+            QListIterator<timerEventItem> it( timerEventList );
+            time_t deleteTime = TimeConversion::toUTC( when );
+            for ( ; *it; ++it ) {
+                // if its a match, delete it
+                if ( ( (*it)->UTCtime == deleteTime || when.isNull() )
+                    && ( channel.isNull() || (*it)->channel == channel )
+                    && ( message.isNull() || (*it)->message == message )
+                    && ( data==-1 || (*it)->data == data ) )
+                {
+                    // if it's first, then we need to update the timer
+                    if ( (*it) == nearestTimerEvent ) {
+                        timerEventList.remove(*it);
+                        setNearestTimerEvent();
+                    } else {
+                        timerEventList.remove(*it);
+                    }
+                    needSave = TRUE;
+                }
+            }
+            if ( nearestTimerEvent )
+                timerEventReceiver->resetTimer();
+        }
+        if ( needSave )
+            saveState();
+    } else {
+        QCopEnvelope e( "QPE/System", "deleteAlarm(QDateTime,QCString,QCString,int)" );
+        e << when << channel << message << data;
+    }
+}
+
+/*!
+  Writes the system clock to the hardware clock.
+*/
+void Global::writeHWClock()
+{
+    if ( !triggerAtd( TRUE ) ) {
+        // atd not running? set it ourselves
+        system("/sbin/hwclock --systohc"); // ##### UTC?
+    }
+}