Class: Einhorn::PrctlLinux

Inherits:
PrctlAbstract show all
Defined in:
lib/einhorn/prctl_linux.rb

Constant Summary collapse

IntStruct =

Reading integers is hard with fiddle. :(

Fiddle::CStructBuilder.create(Fiddle::CStruct, [Fiddle::TYPE_INT], ["i"])

Class Method Summary collapse

Class Method Details

.get_pdeathsig ⇒ Object 



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# File 'lib/einhorn/prctl_linux.rb', line 20

def self.get_pdeathsig
  out = IntStruct.malloc
  out.i = 0
  if PrctlRaw.prctl(PrctlRaw::GET_PDEATHSIG, out.to_i, 0, 0, 0) != 0
    raise SystemCallError.new("get_pdeathsig", Fiddle.last_error)
  end

  signo = out.i
  if signo == 0
    return nil
  end

  Signal.signame(signo)
end

.set_pdeathsig(signal) ⇒ Object 



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# File 'lib/einhorn/prctl_linux.rb', line 35

def self.set_pdeathsig(signal)
  signo = if signal.nil?
    0
  elsif signal.instance_of?(String)
    Signal.list.fetch(signal)
  else
    signal
  end

  if PrctlRaw.prctl(PrctlRaw::SET_PDEATHSIG, signo, 0, 0, 0) != 0
    raise SystemCallError.new("set_pdeathsig(#{signal})", Fiddle.last_error)
  end
end