Sha256: ad7846849da35e5c75587ee40f8ad1da931a0209b583ee8e2ecaa57777077414
Contents?: true
Size: 1.88 KB
Versions: 12
Compression:
Stored size: 1.88 KB
Contents
# frozen_string_literal: true
# Released under the MIT License.
# Copyright, 2020-2023, by Samuel Williams.
require 'socket'
module Async
module IO
module Peer
include ::Socket::Constants
# Is it likely that the socket is still connected?
# May return false positive, but won't return false negative.
def connected?
return false if @io.closed?
# If we can wait for the socket to become readable, we know that the socket may still be open.
result = to_io.recv_nonblock(1, MSG_PEEK, exception: false)
# No data was available - newer Ruby can return nil instead of empty string:
return false if result.nil?
# Either there was some data available, or we can wait to see if there is data avaialble.
return !result.empty? || result == :wait_readable
rescue Errno::ECONNRESET
# This might be thrown by recv_nonblock.
return false
end
def eof
!connected?
end
def eof?
!connected?
end
# Best effort to set *_NODELAY if it makes sense. Swallows errors where possible.
def sync=(value)
super
case self.protocol
when 0, IPPROTO_TCP
self.setsockopt(IPPROTO_TCP, TCP_NODELAY, value ? 1 : 0)
else
Console.logger.warn(self) {"Unsure how to sync=#{value} for #{self.protocol}!"}
end
rescue Errno::EINVAL
# On Darwin, sometimes occurs when the connection is not yet fully formed. Empirically, TCP_NODELAY is enabled despite this result.
rescue Errno::EOPNOTSUPP
# Some platforms may simply not support the operation.
# Console.logger.warn(self) {"Unable to set sync=#{value}!"}
end
def sync
case self.protocol
when IPPROTO_TCP
self.getsockopt(IPPROTO_TCP, TCP_NODELAY).bool
else
true
end && super
end
def type
self.local_address.socktype
end
def protocol
self.local_address.protocol
end
end
end
end
Version data entries
12 entries across 12 versions & 1 rubygems