Class: IO

Inherits:
Object show all
Defined in:
lib/phusion_passenger/utils.rb

Instance Method Summary collapse

Instance Method Details

#close_on_exec! ⇒ Object 



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# File 'lib/phusion_passenger/utils.rb', line 994

def close_on_exec!
	fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC)
end

#writev(components) ⇒ Object

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"])



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# File 'lib/phusion_passenger/utils.rb', line 970

def writev(components)
	return PhusionPassenger::NativeSupport.writev(fileno, components)
end

#writev2(components, components2) ⇒ Object

Like #writev, but accepts two arrays. The data is written in the given order.

io.writev2(["hello ", "world", "\n"], ["another ", "message\n"])



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# File 'lib/phusion_passenger/utils.rb', line 977

def writev2(components, components2)
	return PhusionPassenger::NativeSupport.writev2(fileno,
		components, components2)
end

#writev3(components, components2, components3) ⇒ Object

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"])



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# File 'lib/phusion_passenger/utils.rb', line 987

def writev3(components, components2, components3)
	return PhusionPassenger::NativeSupport.writev3(fileno,
		components, components2, components3)
end