At Thursday 23/11/2006 12:28, jrpfinch wrote:
I'm just getting started on threading and was wondering why the
following code does not work (i know globals is bad style - I'll
eliminate them eventually). All I get is a blank cursor flashing.
You've got your example already working.
Globals are bad style, but worse, threads and globals don't mix very
well: you need some sort of syncronization for accessing globals
(specially for writing them).
class ImapThread(threading.Thread):
def run(self):
global g_currenttick
if time.time() > (g_datum + (g_secondspertick *
g_currenttick)):
print "Ticked %s" % g_currenttick
g_currenttick=g_currenttick+1
print g_currenttick
Having more than one thread, g_currenttick could have been modified
*after* you read its value and *before* you write it back, so you
lose the count.
--
Gabriel Genellina
Softlab SRL
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