Toggle Text on Button (Using thread timers)

dubby (Dave) — Fri, 19 Oct 2007 07:07:11 GMT

// Works on a seperate thread and changes the color of a button if a significant event happens



void HotShotTick(object obj)

{

if (this.InvokeRequired) { this.Invoke((MethodInvoker)delegate {

this.FillHotshots();

if (this.dsSignificant.HotshotBets.Rows.Count > 0)

{

this.btnHotShotBets.BackColor = Color.Red;

}

else

{

this.btnHotShotBets.BackColor = Color.Green;

}

});

}

Thread Pool and Threaded Python decorators

sevkin (Vsevolod Balashov) — Thu, 16 Aug 2007 12:55:37 GMT



#!/usr/bin/env python

# -*- coding: utf-8 -*-

# vim:ts=4:sw=4:et

# (c) 2007 under terms of LGPL v 2.1

# by Vsevolod S. Balashov  



from threading import Thread



def threaded(func):

    def proxy(*args, **kwargs):

        thread = Thread(target=func, args=args, kwargs=kwargs)

        thread.start()

        return thread

    return proxy



from Queue import Queue



class Pool(Queue):

    def __init__(self, maxsize):

        assert maxsize > 0, 'maxsize > 0 required for Pool class'

        Queue.__init__(self, maxsize)

        for i in range(maxsize):

            thread = Thread(target = self._worker)

            thread.setDaemon(True)

            thread.start()



    def _worker(self):

        while True:

            try:

                func, args, kwargs = self.get()

                func(*args, **kwargs)

            except:

                self.task_done()

                self.join()

                raise

            self.task_done()



    def addJob(self, func, *args, **kwargs):

        self.put((func, args, kwargs))



    def __enter__(self):

        pass



    def __exit__(self, exc_type, exc_value, traceback):

        self.join()



def threadpool(pool):

    assert pool.__class__ == Pool, 'threadpool decorator require a Pool object'

    def decorator(func):

        def proxy(*args, **kwargs):

            pool.put((func, args, kwargs))

            return pool

        return proxy

    return decorator

example usage



from threadpool import *



from time import sleep

from random import random



pool = Pool(3)

    

@threadpool(pool)

def test_threadpool(i):

    print 'threadpool %i enter' % i

    sleep(random())

    print 'threadpool %i exit' % i



print 'threadpool example'

for i in range(6):

    test_threadpool(i)

pool.join()

print 'done'

print ''



@threaded

def test_threaded(i):

    print 'threaded %i enter' % i

    sleep(random())

    print 'threaded %i exit' % i



print 'threaded example'

for i in range(5):

    test_threaded(i)

print 'done'

result output

threadpool example
threadpool 0 enter
threadpool 1 enter
threadpool 2 enter
threadpool 0 exit
threadpool 3 enter
threadpool 1 exit
threadpool 4 enter
threadpool 2 exit
threadpool 5 enter
threadpool 3 exit
threadpool 5 exit
threadpool 4 exit
done

threaded example
done
threaded 0 enter
threaded 1 enter
threaded 2 enter
threaded 3 enter
threaded 4 enter
threaded 1 exit
threaded 2 exit
threaded 3 exit
threaded 0 exit
threaded 4 exit

DZone Snippets: pool code

Toggle Text on Button (Using thread timers)

Thread Pool and Threaded Python decorators