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Difference between dispatch_async and dispatch_sync on serial queue?
...hange anything. This code always print 12
dispatch_async(_serialQueue, ^{ sleep(1000);printf("1"); });
dispatch_async(_serialQueue, ^{ printf("2"); });
What may happened is
Thread 1: dispatch_async a time consuming task (task 1) to serial queue
Thread 2: start executing task 1
Thread 1: dispat...
Cancellation token in Task constructor: why?
...e.WriteLine("Starting task");
task.Start();
Thread.Sleep(100);
Console.WriteLine("Canceling task");
tokenSource.Cancel();
task.Wait();
}
catch (Exception ex)
{
Console.WriteLine("Exception: {0}", ex.Mess...
Does PHP have threading?
...$t->start()){
while($t->isRunning()){
echo ".";
usleep(100);
}
$t->join();
}
For linux there is an installation guide right here at stackoverflow's.
For windows there is one now:
First you need the thread-safe version of php.
You need the pre-compiled versio...
Which concurrent Queue implementation should I use in Java?
...ut the consumer side is more complicated because poll won't go into a nice sleep state. You have to handle that yourself.
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Check if at least two out of three booleans are true
... {
while(true)
{
work();
Thread.sleep(1000);
}
}
}
This prints the following on my machine (running Ubuntu on Intel Core 2 + sun java 1.6.0_15-b03 with HotSpot Server VM (14.1-b02, mixed mode)):
First and second iterations:
a&&b || b...
Best practice: AsyncTask during orientation change
...ring... urls) {
// Simulate a burdensome load.
int sleepSeconds = 4;
for (int i = 1; i <= sleepSeconds; i++) {
SystemClock.sleep(1000); // milliseconds
publishProgress(i * 20); // Adjust for a scale to 100
}
...
How do I handle the window close event in Tkinter?
... for i in range(10):
print((i+1), "of 10")
time.sleep(0.2)
lbl["text"] = str(time.time()) # Will error if force-closed.
root.update() # Force redrawing since we change label multiple times in a row.
busy_processing = False
root.after...
What is the meaning of “POSIX”?
...sem_*, shared memory (shm_*), kill, scheduling parameters (nice, sched_*), sleep, mkfifo, setpgid()
networking: socket()
memory management: mmap, mlock, mprotect, madvise, brk()
utilities: regular expressions (reg*)
Those APIs also determine underlying system concepts on which they depend, e.g. fo...
Fragment onCreateView and onActivityCreated called twice
...
Works perfectly well! You saved my night's sleep! Thank you :)
– jaibatrik
Jan 1 '13 at 20:06
...
How to gracefully handle the SIGKILL signal in Java
... }
});
while (true)
{
Thread.sleep(1000);
}
}
}
There isn't any way to really gracefully handle a kill -9 in any program.
In rare circumstances the virtual
machine may abort, that is, stop
running without shutting down cleanly.
Th...