70 lines
2.0 KiB
GDScript3
70 lines
2.0 KiB
GDScript3
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extends PeriodicSchedulerBase
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class_name PeriodicScheduler
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const UTC_ZERO : float = Scheduler.UTC_ZERO
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const DELTA_ZERO : float = Scheduler.DELTA_ZERO
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## Represents a notion of time for this scheduler. Tasks being
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## scheduled on a scheduler will adhere to the time denoted by this
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## property.
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## [br]
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## [b]Returns:[/b]
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## [br]
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## The scheduler's current time, as a datetime instance.
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func now() -> float:
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return GDRx.basic.default_now()
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## Invoke the given given action. This is typically called by instances
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## of [ScheduledItem].
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## [br]
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## [b]Args:[/b]
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## [br]
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## [code]action[/code] Action to be executed.
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## [br]
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## [code]state[/code] [Optional] state to be given to the action function.
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## [br][br]
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## [b]Returns:[/b]
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## [br]
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## The disposable object returned by the action, if any; or a new
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## (no-op) disposable otherwise.
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func invoke_action(action : Callable, state = null) -> DisposableBase:
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var ret = action.call(self, state)
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if ret is DisposableBase:
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return ret
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return Disposable.new()
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## Schedule a periodic action for repeated execution every time
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## [code]period[/code] seconds have expired.
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func schedule_periodic(
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period : float,
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action : Callable,
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state = null) -> DisposableBase:
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var disp : MultipleAssignmentDisposable = MultipleAssignmentDisposable.new()
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var seconds : float = period
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var periodic : Callable = func(scheduler : SchedulerBase, state = null, periodic_ : Callable = func(__, ___, ____): return) -> Disposable:
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if disp.is_disposed:
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return null
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var _now : float = scheduler.now()
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var state_res = RefValue.Null()
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if not GDRx.try(func():
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state_res.v = action.call(state)
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) \
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.catch("Error", func(err):
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disp.dispose()
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GDRx.raise(err)
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) \
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.end_try_catch(): state = state_res.v
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var time = seconds - (scheduler.now() - _now)
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disp.disposable = scheduler.schedule_relative(time, periodic_.bind(periodic_), state)
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return null
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periodic = periodic.bind(periodic)
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disp.disposable = self.schedule_relative(period, periodic, state)
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return disp
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