Class IO
In: lib/phusion_passenger/utils.rb
Parent: Object

Methods

close_on_exec!   close_on_exec!   writev   writev2   writev3  

Public Instance methods

close_on_exec!()

[Source]

      # File lib/phusion_passenger/utils.rb, line 1006
1006:                 def close_on_exec!
1007:                 end
close_on_exec!()

[Source]

      # File lib/phusion_passenger/utils.rb, line 1002
1002:                 def close_on_exec!
1003:                         fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC)
1004:                 end
writev(components)

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"])

[Source]

     # File lib/phusion_passenger/utils.rb, line 978
978:                 def writev(components)
979:                         return PhusionPassenger::NativeSupport.writev(fileno, components)
980:                 end
writev2(components, components2)

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

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

[Source]

     # File lib/phusion_passenger/utils.rb, line 985
985:                 def writev2(components, components2)
986:                         return PhusionPassenger::NativeSupport.writev2(fileno,
987:                                 components, components2)
988:                 end
writev3(components, components2, components3)

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"])

[Source]

     # File lib/phusion_passenger/utils.rb, line 995
995:                 def writev3(components, components2, components3)
996:                         return PhusionPassenger::NativeSupport.writev3(fileno,
997:                                 components, components2, components3)
998:                 end

[Validate]