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Contents
# Copyright, 2018, by Samuel G. D. Williams. <http://www.codeotaku.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
require_relative 'notification'
module Async
module IO
# A cross-reactor/process notification pipe.
class Trap
def initialize(name)
@name = name
@notifications = []
end
def install!
Signal.trap(@name, &self.method(:trigger))
return self
end
# Block the calling task until the signal occurs.
def trap
task = Task.current
task.annotate("waiting for signal #{@name}")
notification = Notification.new
@notifications << notification
while true
notification.wait
yield
end
ensure
if notification
notification.close
@notifications.delete(notification)
end
end
# Signal all waiting tasks that the trap occurred.
# @return [void]
def trigger(signal_number = nil)
@notifications.each(&:signal)
end
end
end
end
Version data entries
35 entries across 35 versions & 1 rubygems