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# frozen_string_literal: true
# Released under the MIT License.
# Copyright, 2018-2025, by Samuel Williams.
require_relative "condition"
module Async
# A synchronization primitive, which allows fibers to wait until a notification is received. Does not block the task which signals the notification. Waiting tasks are resumed on next iteration of the reactor.
# @public Since *Async v1*.
class Notification < Condition
# Signal to a given task that it should resume operations.
#
# @returns [Boolean] if a task was signalled.
def signal(value = nil)
return false if empty?
Fiber.scheduler.push Signal.new(self.exchange, value)
return true
end
Signal = Struct.new(:ready, :value) do
def alive?
true
end
def transfer
ready.num_waiting.times do
ready.push(value)
end
ready.close
end
end
private_constant :Signal
end
end
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