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require 'thread'
class String
if RUBY_VERSION < "1.9"
def getbyte(index)
self[index]
end
def setbyte(index, c)
self[index] = c
end
end
if RUBY_VERSION < "1.8.7"
def bytesize
self.size
end
end
end
module Net; module SSH
# This class contains miscellaneous patches and workarounds
# for different ruby implementations.
class Compat
# A workaround for an IO#select threading bug in certain versions of MRI 1.8.
# See: http://net-ssh.lighthouseapp.com/projects/36253/tickets/1-ioselect-threading-bug-in-ruby-18
# The root issue is documented here: http://redmine.ruby-lang.org/issues/show/1993
if RUBY_VERSION >= '1.9' || RUBY_PLATFORM == 'java'
def self.io_select(*params)
IO.select(*params)
end
else
SELECT_MUTEX = Mutex.new
def self.io_select(*params)
# It should be safe to wrap calls in a mutex when the timeout is 0
# (that is, the call is not supposed to block).
# We leave blocking calls unprotected to avoid causing deadlocks.
# This should still catch the main case for Capistrano users.
if params[3] == 0
SELECT_MUTEX.synchronize do
IO.select(*params)
end
else
IO.select(*params)
end
end
end
end
end; end
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