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make the time limit manditory, and make sure the machine runs up to, but does not exceed, the limit

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This commit is contained in:
Joel Bender 2015-08-09 12:28:46 -04:00
parent 523e462fbf
commit 46249dd55a
1 changed files with 24 additions and 14 deletions
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38
tests/time_machine.py
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@ -70,32 +70,40 @@ class TimeMachine(_TaskManager):
"""get the next task if there's one that should be processed,
and return how long it will be until the next one should be
processed."""
if _debug: TimeMachine._debug("get_next_task")
if _debug: TimeMachine._debug(" - self: %r", self)
if _debug: TimeMachine._debug("get_next_task @ %r", self.current_time)
if _debug: TimeMachine._debug(" - self.tasks: %r", self.tasks)
task = None
delta = None
if (self.time_limit is not None) and (self.current_time > self.time_limit):
if (self.time_limit is not None) and (self.current_time >= self.time_limit):
if _debug: TimeMachine._debug(" - time limit reached")
elif not self.tasks:
if _debug: TimeMachine._debug(" - no more tasks")
else:
# pull it off the list
when, task = heappop(self.tasks)
if _debug: TimeMachine._debug(" - when, task: %r, %r", when, task)
# peek at the next task and see when it is supposed to run
when, _ = self.tasks[0]
if when >= self.time_limit:
if _debug: TimeMachine._debug(" - time limit reached")
# mark that it is no longer scheduled
task.isScheduled = False
# bump up to the time limit
self.current_time = self.time_limit
# advance the time
self.current_time = when
else:
# pull it off the list
when, task = heappop(self.tasks)
if _debug: TimeMachine._debug(" - when, task: %r, %s", when, task)
# do not wait, time has moved
delta = 0.0
# mark that it is no longer scheduled
task.isScheduled = False
# advance the time
self.current_time = when
# do not wait, time has moved
delta = 0.0
# return the task to run and how long to wait for the next one
return (task, delta)
@ -130,7 +138,7 @@ def reset_time_machine():
#
@bacpypes_debugging
def run_time_machine(time_limit=None):
def run_time_machine(time_limit):
"""This function is called after a set of tasks have been installed
and they should all run.
"""
@ -140,8 +148,10 @@ def run_time_machine(time_limit=None):
# a little error checking
if not time_machine:
raise RuntimeError("no time machine")
if time_limit <= 0.0:
raise ValueError("time limit required")
# let the task manager know there is a virtual time limit
# pass the limit to the time machine
time_machine.time_limit = time_limit
# run until there is nothing left to do