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-rw-r--r--library/alarmserver.cpp60
1 files changed, 60 insertions, 0 deletions
diff --git a/library/alarmserver.cpp b/library/alarmserver.cpp
index a75fc7e..6f6f32d 100644
--- a/library/alarmserver.cpp
+++ b/library/alarmserver.cpp
@@ -127,326 +127,386 @@ static void saveState()
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();
}
}
#ifdef USE_ATD
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) ) {
if ( trigger.writeBlock("\n", 2) != 2 ) {
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;
}
#else
static bool writeResumeAt ( time_t wakeup )
{
FILE *fp = ::fopen ( "/var/run/resumeat", "w" );
if ( fp ) {
::fprintf ( fp, "%d\n", (int) wakeup );
::fclose ( fp );
}
else
qWarning ( "Failed to write wakeup time to /var/run/resumeat" );
return ( fp );
}
#endif
void TimerReceiverObject::deleteTimer()
{
#ifdef USE_ATD
if ( !atfilename.isEmpty() ) {
unlink( atfilename );
atfilename = QString::null;
triggerAtd( FALSE );
}
#else
writeResumeAt ( 0 );
#endif
}
void TimerReceiverObject::resetTimer()
{
const int maxsecs = 2147000;
QDateTime nearest = TimeConversion::fromUTC(nearestTimerEvent->UTCtime);
QDateTime now = QDateTime::currentDateTime();
if ( nearest < now )
nearest = now;
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);
#ifdef USE_ATD
QString fn = atdir + QString::number(at_secs) + "."
+ QString::number(getpid());
if ( fn != atfilename ) {
QFile atfile(fn + ".new");
if ( atfile.open(IO_WriteOnly | IO_Raw) ) {
int total_written;
// 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());
}
}
#else
writeResumeAt ( at_secs );
#endif
// 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()) ) {
#ifndef QT_NO_COP
QCopEnvelope e( nearestTimerEvent->channel,
nearestTimerEvent->message );
e << TimeConversion::fromUTC( nearestTimerEvent->UTCtime )
<< nearestTimerEvent->data;
#endif
timerEventList.remove( nearestTimerEvent );
needSave = TRUE;
}
setNearestTimerEvent();
}
else {
resetTimer();
}
if ( needSave )
saveState();
}
/*!
\class AlarmServer alarmserver.h
\brief The AlarmServer class allows alarms to be scheduled and unscheduled.
Applications can schedule alarms with addAlarm() and can
unschedule alarms with deleteAlarm(). When the time for an alarm
to go off is reached the specified \link qcop.html QCop\endlink
message is sent on the specified channel (optionally with
additional data).
Scheduling an alarm using this class is important (rather just using
a QTimer) since the machine may be asleep and needs to get woken up using
the Linux kernel which implements this at the kernel level to minimize
battery usage while asleep.
+ A small example on how to use AlarmServer.
+
+ First we need to connect a slot the AppMessage QCOP call. appMessage
+ will be emitted if QPE/Application/appname gets called.
+
+ \code
+ TestApp::TestApp(QWidget *parent, const char* name, WFlags fl )
+ : QMainWindow(parent,name,fl){
+ connect(qApp,SIGNAL(appMessage(const QCString&,const QByteArray&)),
+ this,SLOT(slotAppMessage(const QCString&,const QByteArray&)));
+ }
+ \endcode
+
+ To add / delete an alarm, you can use the static method AlarmServer::addAlarm and
+ AlarmServer::deleteAlarm. Note that an old (expired) alarm will automatically be deleted
+ from the alarmserver list, but a change in timing will have the effect, that both
+ alarms will be emitted. So if you change an Alarm be sure to delete the old one!
+ @see addAlarm
+
+ \code
+ QDateTime oldDt = oldAlarmDateTime();
+ QPEApplication::execDialog(ourDlg);
+ QDateTime newDt = ourDlg->dateTime();
+ if(newDt == oldDt ) return;
+ @slash* code is missing for unsetting an alarm *@slash
+
+ AlarmServer::deleteAlarm(oldDt,"QPE/Application/appname","checkAlarm(QDateTime,int)",0);
+ AlarmServer::addAlarm( newDt,"QPE/AlarmServer/appname","checkAlarm(QDateTime,int)",0);
+
+ \endcode
+
+ Now once the Alarm is emitted you need to check the appMessage and then do what you want.
+ \code
+ void TestApp::slotAppMessage(const QCString& str, const QByteArray& ar ){
+ QDataStream stream(ar,IO_ReadOnly);
+ if(str == "checkAlarm(QDateTime,int)" ){
+ QDateTime dt;
+ int a;
+ stream >> dt >> a;
+ // fire up alarm
+ }
+ }
+ \endcode
+
\ingroup qtopiaemb
\sa QCopEnvelope
+ @see QPEApplication::appMessage(const QCString&,const QByteArray&)
+ @see OPimMainWindow
+ @see ODevice::alarmSound()
+ @see Sound::soundAlarm()
*/
/*!
Schedules an alarm to go off at (or soon after) time \a when. When
the alarm goes off, the \link qcop.html QCop\endlink \a message will
be sent to \a channel, with \a data as a parameter.
If this function is called with exactly the same data as a previous
call the subsequent call is ignored, so there is only ever one alarm
with a given set of parameters.
+ Once an alarm is emitted. The \a channel with a \a message will be emitted
+ and data will be send.
+ The QDateTime and int are the two parameters included in the QCOP message.
+ You can specify channel, message and the integer parameter. QDateTime will be
+ the datetime of the QCop call.
+
+ @param when The QDateTime of the alarm
+ @param channel The channel which gets called once the alarm is emitted
+ @param message The message to be send to the channel
+ @param data Additional data as integer
+
+ @see QCopChannel
\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 {
#ifndef QT_NO_COP
QCopEnvelope e( "QPE/System", "addAlarm(QDateTime,QCString,QCString,int)" );
e << when << channel << message << data;
#endif
}
}
/*!
Deletes previously scheduled alarms which match \a when, \a channel,
\a message, and \a data.
Passing null values for \a when, \a channel, or for the \link
qcop.html QCop\endlink \a message, acts as a wildcard meaning "any".
Similarly, passing -1 for \a data indicates "any".
If there is no matching alarm, nothing happens.
\sa addAlarm()
*/
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 {
#ifndef QT_NO_COP
QCopEnvelope e( "QPE/System", "deleteAlarm(QDateTime,QCString,QCString,int)" );
e << when << channel << message << data;
#endif
}
}
/*!
The implementation depends on the mode of AlarmServer. If the AlarmServer
uses atd the current system time will be written to the hardware clock.
If the AlarmServer relies on opie-alarm the time will be written once the
device gets suspended. opie-alarm is used by the Zaurus, iPAQs and SIMpad
*/
void Global::writeHWClock()
{
#ifdef USE_ATD
if ( !triggerAtd( TRUE ) ) {
// atd not running? set it ourselves
system("/sbin/hwclock --systohc"); // ##### UTC?
}
#else
// hwclock is written on suspend
#endif
}