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All normal Ruby IO methods (IO#read, IO#gets, IO#write, ...) are all capable of appearing to be "blocking" when presented with a file description with the O_NONBLOCK flag set; so there is little risk of incompatibility within Ruby-using programs. The biggest compatibility risk is when spawning external programs. As a result, stdin, stdout, and stderr are now always made blocking before exec-family calls. This change will make an event-oriented MJIT usable if it is waiting on pipes on POSIX_like platforms. It is ALSO necessary to take advantage of (proposed lightweight concurrency (aka "auto-Fiber") or any similar proposal for network concurrency: https://bugs.ruby-lang.org/issues/13618 Named-pipe (FIFO) are NOT yet non-blocking by default since they are rarely-used and may introduce compatibility problems and extra syscall overhead for a common path. Please revert this commit if there are problems and if I am afk since I am afk a lot, lately. [ruby-core:89950] [Bug #14968] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65922 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
73 lines
1.6 KiB
Ruby
73 lines
1.6 KiB
Ruby
# frozen_string_literal: false
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require 'test/unit'
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require 'timeout'
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begin
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require 'io/nonblock'
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rescue LoadError
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end
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class TestIONonblock < Test::Unit::TestCase
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def test_flush
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IO.pipe {|r, w|
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return if flush_test(r, w)
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}
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require 'socket';
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Socket.pair(:INET, :STREAM) {|s1, s2|
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return if flush_test(s1, s2)
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}
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skip "nonblocking IO did not work"
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end
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def flush_test(r, w)
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begin
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w.nonblock = true
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rescue Errno::EBADF
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return false
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end
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w.sync = false
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w << "b"
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w.flush
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w << "a" * 4096
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result = ""
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Timeout.timeout(10) {
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t0 = Thread.new {
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Thread.pass
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w.close
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}
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t = Thread.new {
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while (Thread.pass; s = r.read(4096))
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result << s
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end
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}
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begin
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w.flush # assert_raise(IOError, "[ruby-dev:24985]") {w.flush}
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rescue Errno::EBADF, IOError
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# ignore [ruby-dev:35638]
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end
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assert_nothing_raised {t.join}
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t0.join
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}
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assert_equal(4097, result.size)
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true
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end
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def test_nonblock
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IO.pipe {|r, w|
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w.nonblock = false
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assert_equal(false, w.nonblock?)
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w.nonblock do
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assert_equal(true, w.nonblock?)
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w.nonblock(false) do
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assert_equal(false, w.nonblock?)
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w.nonblock(false) do
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assert_equal(false, w.nonblock?)
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end
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assert_equal(false, w.nonblock?)
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end
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assert_equal(true, w.nonblock?)
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end
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assert_equal(false, w.nonblock?)
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}
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rescue NotImplementedError
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end
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end if IO.method_defined?(:nonblock)
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