Current File : //usr/share/passenger/phusion_passenger/ruby_core_io_enhancements.rb
# encoding: binary
# Phusion Passenger - https://www.phusionpassenger.com/
# Copyright (c) 2010-2017 Phusion Holding B.V.
#
# "Passenger", "Phusion Passenger" and "Union Station" are registered
# trademarks of Phusion Holding B.V.
#
# 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.
PhusionPassenger.require_passenger_lib 'native_support'
class IO
if defined?(PhusionPassenger::NativeSupport)
# Writes all of the strings in the +components+ array into the given file
# descriptor using the +writev()+ system call. Unlike IO#write, this method
# does not require one to concatenate all those strings into a single buffer
# in order to send the data in a single system call. Thus, #writev is a great
# way to perform zero-copy I/O.
#
# Unlike the raw writev() system call, this method ensures that all given
# data is written before returning, by performing multiple writev() calls
# and whatever else is necessary.
#
# io.writev(["hello ", "world", "\n"])
def writev(components)
return PhusionPassenger::NativeSupport.writev(fileno, components)
end
# Like #writev, but accepts two arrays. The data is written in the given order.
#
# io.writev2(["hello ", "world", "\n"], ["another ", "message\n"])
def writev2(components, components2)
return PhusionPassenger::NativeSupport.writev2(fileno,
components, components2)
end
# Like #writev, but accepts three arrays. The data is written in the given order.
#
# io.writev3(["hello ", "world", "\n"],
# ["another ", "message\n"],
# ["yet ", "another ", "one", "\n"])
def writev3(components, components2, components3)
return PhusionPassenger::NativeSupport.writev3(fileno,
components, components2, components3)
end
else
def writev(components)
return write(components.pack('a*' * components.size))
end
def writev2(components, components2)
joined = components + components2
return write(joined.pack('a*' * joined.size))
end
def writev3(components, components2, components3)
joined = components + components2 + components3
return write(joined.pack('a*' * joined.size))
end
end
if IO.method_defined?(:close_on_exec=)
def close_on_exec!
begin
self.close_on_exec = true
rescue NotImplementedError
end
end
else
require 'fcntl'
if defined?(Fcntl::F_SETFD)
def close_on_exec!
fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC)
end
else
def close_on_exec!
end
end
end
end
Mini Shell