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pthread_cond_timedwait with monolic timer sometimes timeouts later than expected


By : Scott Dillon
Date : September 15 2020, 12:00 AM
With these it helps You are invoking undefined behavior by calling pthread_cond_timedwait() without locking the associated mutex.
The POSIX documentation for pthread_cond_timedwait() states:
code :


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.Net Timeouts: WaitForSingleObject vs Timer


By : Ashish Jain
Date : March 29 2020, 07:55 AM
seems to work fine Microsoft's Morgan Skinner seems to prefer RegisterWaitForSingleObject.
As far as allocations are concerned, reflector reveals that RegisterWaitForSingleObject create an instance of a RegisteredWaitHandle, while a timer creates an internal TimerBase, as well as a class named _TimerCallback. One could go on and compare the sizes of these classes and so forth, but they seem to be have more dependencies, especially unmanaged ones (both use underlying win32 functions) - so I really can't give a straight answer.

EJB Timer Service: order of timeouts


By : user43106
Date : March 29 2020, 07:55 AM
may help you . There is no built-in way to order timers like that. You could do it manually:
Schedule a single-action timer for A in 30 seconds with info=1 Schedule an interval timer for B for 120 seconds When A fires with info=1, schedule a single-action timer for A in 30 seconds with info=2 When A fires with info=2, schedule a single action timer for A in 30 seconds with info=3 When A fires with info=3, don't reschedule When B fires, call A, then do the work for B. Schedule a single-action timer for A in 30 seconds with info=1

EJB Timer Service: order of timeouts with same ScheduleExpression


By : BenJaEGo
Date : March 29 2020, 07:55 AM
Any of those help In this case all tasks are using the same ScheduleExpression, doing all tasks to execute in the "same time". A workaround was to increment 1 second by task received to force a order.

clear clipboard when timer timeouts


By : Abdussalam
Date : March 29 2020, 07:55 AM
around this issue This error occurs because the Timer event fires on a separate thread than the UI thread. You can change a UI element in one of two ways. The first is to tell the Dispatcher object to execute the code on the UI thread. If your object with the Timer is a DependencyObject (e.g. PhoneApplicationPage), you can use the Dispatcher property. This is done with the BeginInvoke method.
code :
void ClearClipboard(object o)
{
    Dispatcher.BeginInvoke(() => Clipboard.SetText(""));
}
void ClearClipboard(object o)
{
    Deployment.Current.Dispatcher.BeginInvoke(() => Clipboard.SetText(""));
}
// Create the timer
DispatcherTimer timer = new DispatcherTimer();
timer.Interval = TimeSpan.FromSeconds(3);
timer.Tick += TimerOnTick;

// The subscription method
private void TimerOnTick(object sender, EventArgs eventArgs)
{
    Clipboard.SetText("");
}

Java timer with multiple timeouts


By : minhdinh
Date : March 29 2020, 07:55 AM
it should still fix some issue Let's say I have an array of integers
code :
public class ArraysFun{
    private static int[] timeouts = {1000,2000,3000,3500};
    public static void main(String[] sss){
        endlessCounter(0);
    }
    //Endless counter that calls your function
    public static void endlessCounter(int i){
        long start = System.currentTimeMillis();
        long now;
        do{
            now = System.currentTimeMillis();
        //checks to see if the time was elapsed
        }while(now - start<timeouts[i]);
        //call your function
        callFunction(i);
        //iterate through the timeouts array
        i = (i>= timeouts.length-1)? 0 : i+1;
        //call the counter again
        endlessCounter(i);
    }
    //just print which is the timeout that was waited before this call
    private static void callFunction(int i) {
        double duration = (double)timeouts[i]/1000.00;
        System.out.println("Function called after "+ duration + " seconds");
    }
}
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