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Delay zero after successful action.

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This commit is contained in:
Guido van Rossum 1991-04-21 19:33:53 +00:00
parent fa0e726154
commit a31b9ccbbc
1 changed files with 8 additions and 2 deletions
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10
Lib/sched.py
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@ -11,8 +11,8 @@
# and millisleep from the built-in module time, or you can implement
# simulated time by writing your own functions. This can also be
# used to integrate scheduling with STDWIN events; the delay function
# is allowed to modify the queue. Time can be expressed
# as integers or floating point numbers, as long as it is consistent.
# is allowed to modify the queue. Time can be expressed as
# integers or floating point numbers, as long as it is consistent.
# Events are specified by tuples (time, priority, action, argument).
# As in UNIX, lower priority numbers mean higher priority; in this
@ -83,6 +83,11 @@ def empty(self):
# exceptions are not caught but the scheduler's state
# remains well-defined so run() may be called again.
#
# A questionably hack is added to allow other threads to run:
# just after an event is executed, a delay of 0 is executed,
# to avoid monopolizing the CPU when other threads are also
# runnable.
#
def run(self):
q = self.queue
while q:
@ -93,4 +98,5 @@ def run(self):
else:
del q[0]
void = action(argument)
self.delayfunc(0) # Let other threads run
#