cpython/Lib/stdwin/WindowSched.py

63 lines
1.3 KiB
Python
Raw Normal View History

1991-04-07 10:41:50 -03:00
# Combine a real-time scheduling queue and stdwin event handling.
# Keeps times in milliseconds.
1991-04-07 10:41:50 -03:00
import stdwin, stdwinq
1991-04-07 10:41:50 -03:00
from stdwinevents import WE_TIMER
import mainloop
1991-04-07 10:41:50 -03:00
import sched
import time
# Delay function called by the scheduler when it has nothing to do.
# Return immediately when something is done, or when the delay is up.
#
def delayfunc(msecs):
msecs = int(msecs)
1991-04-07 10:41:50 -03:00
#
# Check for immediate stdwin event
#
event = stdwinq.pollevent()
1991-04-07 10:41:50 -03:00
if event:
mainloop.dispatch(event)
1991-04-07 10:41:50 -03:00
return
#
# Use sleep for very short delays or if there are no windows
1991-04-07 10:41:50 -03:00
#
1992-01-01 15:35:13 -04:00
if msecs < 100 or mainloop.countwindows() == 0:
1991-04-21 16:31:10 -03:00
if msecs > 0:
time.sleep(msecs * 0.001)
1991-04-07 10:41:50 -03:00
return
#
# Post a timer event on an arbitrary window and wait for it
#
window = mainloop.anywindow()
1991-04-07 10:41:50 -03:00
window.settimer(msecs/100)
event = stdwinq.getevent()
1991-04-07 10:41:50 -03:00
window.settimer(0)
if event[0] <> WE_TIMER:
mainloop.dispatch(event)
1991-04-07 10:41:50 -03:00
def millitimer():
return time.time() * 1000
q = sched.scheduler(millitimer, delayfunc)
1991-04-07 10:41:50 -03:00
# Export functions enter, enterabs and cancel just like a scheduler
#
enter = q.enter
enterabs = q.enterabs
cancel = q.cancel
# Emptiness check must check both queues
#
def empty():
1992-01-01 15:35:13 -04:00
return q.empty() and mainloop.countwindows() == 0
1991-04-07 10:41:50 -03:00
# Run until there is nothing left to do
#
def run():
while not empty():
if q.empty():
mainloop.dispatch(stdwinq.getevent())
1991-04-07 10:41:50 -03:00
else:
q.run()