RickJ
asked on
Kylix Daemon. TTimer
I have a kylix daemon application that is basically a udpserver.
I need it to have some functionality like the TTimer component.
It needs to perform a certain action every 5 mins.
Do I make a child process and make it sleep for 5 mins ?
How do I catch the event when it wakes?
Any help is greatly appreciated. A source code example would be fantastic.
Thankyou. I am extremely urgent.
I need it to have some functionality like the TTimer component.
It needs to perform a certain action every 5 mins.
Do I make a child process and make it sleep for 5 mins ?
How do I catch the event when it wakes?
Any help is greatly appreciated. A source code example would be fantastic.
Thankyou. I am extremely urgent.
ASKER
Thankyou for the link Ferruccio68.
I have something similar to this already.
To activate my function every 5 mins are you saying that I should set secs in this example to 5 ?
Is it practical to do this in the main processing loop or should I have some sort of child process within the main loop?
I hope this makes sense.
{ begin processing loop }
If secs > 0 Then
Repeat
If bHup Then Begin
{$I-}
Close(fLog);
IoResult;
{$I+}
NewLog;
bHup := false;
End;
{----------------------}
{ Do your daemon stuff }
GetTime(hr,mn,sc,sc100);
Append(flog);
Writeln(flog,'daemon code activated at ',hr:0,':',mn:0,':',sc:0);
Close(fLog);
{ the following output goes to the bit bucket (/dev/null) }
Writeln('daemon code activated at ',hr:0,':',mn:0,':',sc:0);
{----------------------}
If not bTerm Then
{ wait a while }
Select(0,nil,nil,nil,secs)
Until bTerm;
I have something similar to this already.
To activate my function every 5 mins are you saying that I should set secs in this example to 5 ?
Is it practical to do this in the main processing loop or should I have some sort of child process within the main loop?
I hope this makes sense.
{ begin processing loop }
If secs > 0 Then
Repeat
If bHup Then Begin
{$I-}
Close(fLog);
IoResult;
{$I+}
NewLog;
bHup := false;
End;
{----------------------}
{ Do your daemon stuff }
GetTime(hr,mn,sc,sc100);
Append(flog);
Writeln(flog,'daemon code activated at ',hr:0,':',mn:0,':',sc:0);
Close(fLog);
{ the following output goes to the bit bucket (/dev/null) }
Writeln('daemon code activated at ',hr:0,':',mn:0,':',sc:0);
{----------------------}
If not bTerm Then
{ wait a while }
Select(0,nil,nil,nil,secs)
Until bTerm;
well....what is coded in the example is a loop that writes in a log file....
of course setting the secs value to your preferred it will be performed into that timing...
BTW the result is a kind of sleep until a particular condition or event happens.
--> Is it practical to do this in the main processing loop or should I have some sort of child process within the main loop?
It depends on what your main process have to do: Yes if it must only perform the action every 5 mins, but if you need to perform other actions in addition so the loop process must be performed by a child process ('cause the wait stuff freeze the process for a while)...
of course setting the secs value to your preferred it will be performed into that timing...
BTW the result is a kind of sleep until a particular condition or event happens.
--> Is it practical to do this in the main processing loop or should I have some sort of child process within the main loop?
It depends on what your main process have to do: Yes if it must only perform the action every 5 mins, but if you need to perform other actions in addition so the loop process must be performed by a child process ('cause the wait stuff freeze the process for a while)...
ASKER
Thankyou Ferruccio68.
Sorry for the delay in replying.
How do I start a looping child process from within the main process?
Answer this and the points are yours.
Sorry for the delay in replying.
How do I start a looping child process from within the main process?
Answer this and the points are yours.
ASKER CERTIFIED SOLUTION
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ftp://ftp.cncware.com/pub/fpc/daemon.pp