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# Copyright, 2020, 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. | ||
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require_relative 'clock' | ||
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module Async | ||
class Scheduler | ||
if Fiber.respond_to?(:set_scheduler) | ||
def self.supported? | ||
true | ||
end | ||
else | ||
def self.supported? | ||
false | ||
end | ||
end | ||
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def initialize(reactor) | ||
@reactor = reactor | ||
@wrappers = nil | ||
end | ||
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def set! | ||
@wrappers = {} | ||
Fiber.set_scheduler(self) | ||
end | ||
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def clear! | ||
# Because these instances are created with `autoclose: false`, this does not close the underlying file descriptor: | ||
# @ios&.each_value(&:close) | ||
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@wrappers = nil | ||
Fiber.set_scheduler(nil) | ||
end | ||
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private def from_io(io) | ||
@wrappers[io] ||= Wrapper.new(io, @reactor) | ||
end | ||
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def io_wait(io, events, timeout = nil) | ||
wrapper = from_io(io) | ||
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if events == IO::READABLE | ||
if wrapper.wait_readable(timeout) | ||
return IO::READABLE | ||
end | ||
elsif events == IO::WRITABLE | ||
if wrapper.wait_writable(timeout) | ||
return IO::WRITABLE | ||
end | ||
else | ||
if wrapper.wait_any(timeout) | ||
return events | ||
end | ||
end | ||
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return false | ||
ensure | ||
wrapper.reactor = nil | ||
end | ||
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def kernel_sleep(duration) | ||
@reactor.sleep(duration) | ||
end | ||
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def block(blocker, timeout) | ||
@reactor.block(blocker, timeout) | ||
end | ||
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def unblock(blocker, fiber) | ||
@reactor.unblock(blocker, fiber) | ||
end | ||
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def close | ||
end | ||
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def fiber(&block) | ||
task = Task.new(&block) | ||
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task.resume | ||
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return task.fiber | ||
end | ||
end | ||
end |
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# Copyright, 2020, 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. | ||
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require 'async/scheduler' | ||
require 'async/barrier' | ||
require 'net/http' | ||
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RSpec.describe Async::Scheduler, if: Async::Scheduler.supported? do | ||
include_context Async::RSpec::Reactor | ||
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it "can intercept sleep" do | ||
expect(reactor).to receive(:sleep).with(0.001) | ||
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sleep(0.001) | ||
end | ||
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describe 'IO.pipe' do | ||
let(:message) {"Helloooooo World!"} | ||
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it "can send message via pipe" do | ||
input, output = IO.pipe | ||
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reactor.async do | ||
sleep(0.001) | ||
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message.each_char do |character| | ||
output.write(character) | ||
end | ||
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output.close | ||
end | ||
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expect(input.read).to be == message | ||
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input.close | ||
end | ||
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it "can fetch website using Net::HTTP" do | ||
barrier = Async::Barrier.new | ||
events = [] | ||
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3.times do |i| | ||
barrier.async do | ||
events << i | ||
response = Net::HTTP.get(URI "https://www.codeotaku.com/index") | ||
expect(response).to_not be_nil | ||
events << i | ||
end | ||
end | ||
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barrier.wait | ||
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# The requests all get started concurrently: | ||
expect(events.first(3)).to be == [0, 1, 2] | ||
end | ||
end | ||
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context "with thread" do | ||
let(:queue) {Thread::Queue.new} | ||
subject {Thread.new{queue.pop}} | ||
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it "can join thread" do | ||
waiting = 0 | ||
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3.times do | ||
Async do | ||
waiting += 1 | ||
subject.join | ||
waiting -= 1 | ||
end | ||
end | ||
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expect(waiting).to be == 3 | ||
queue.close | ||
end | ||
end | ||
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context "with queue" do | ||
subject {Thread::Queue.new} | ||
let(:item) {"Hello World"} | ||
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it "can pass items between thread and fiber" do | ||
Async do | ||
expect(subject.pop).to be == item | ||
end | ||
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Thread.new do | ||
expect(Fiber).to be_blocking | ||
subject.push(item) | ||
end.join | ||
end | ||
end | ||
end |
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