SIGLIBRT  = Signal(0x21)
	SIGLWP    = Signal(0x20)
	SIGPIPE   = Signal(0xd)
	SIGPROF   = Signal(0x1b)
	SIGQUIT   = Signal(0x3)
	SIGSEGV   = Signal(0xb)
	SIGSTOP   = Signal(0x11)
	SIGSYS    = Signal(0xc)
	SIGTERM   = Signal(0xf)
	SIGTHR    = Signal(0x20)
	SIGTRAP   = Signal(0x5)
	SIGTSTP   = Signal(0x12)
	SIGTTIN   = Signal(0x15)
	SIGTTOU   = Signal(0x16)
	SIGURG    = Signal(0x10)

		return errENOENT
	}
	return e
}

// A Signal is a number describing a process signal.
// It implements the [os.Signal] interface.
type Signal int

func (s Signal) Signal() {}

func (s Signal) String() string {
	if 0 <= s && int(s) < len(signals) {
		str := signals[s]
		if str != "" {
			return str
		}
	}
	return "signal " + itoa.Itoa(int(s))
}

	SIGPIPE   = Signal(0xd)
	SIGPROF   = Signal(0x1b)
	SIGQUIT   = Signal(0x3)
	SIGSEGV   = Signal(0xb)
	SIGSTOP   = Signal(0x11)
	SIGSYS    = Signal(0xc)
	SIGTERM   = Signal(0xf)
	SIGTHR    = Signal(0x20)
	SIGTRAP   = Signal(0x5)
	SIGTSTP   = Signal(0x12)
	SIGTTIN   = Signal(0x15)
	SIGTTOU   = Signal(0x16)
	SIGURG    = Signal(0x10)
	SIGUSR1   = Signal(0x1e)
	SIGUSR2   = Signal(0x1f)

	SIGPIPE   = Signal(0xd)
	SIGPROF   = Signal(0x1b)
	SIGPWR    = Signal(0x20)
	SIGQUIT   = Signal(0x3)
	SIGSEGV   = Signal(0xb)
	SIGSTOP   = Signal(0x11)
	SIGSYS    = Signal(0xc)
	SIGTERM   = Signal(0xf)
	SIGTRAP   = Signal(0x5)
	SIGTSTP   = Signal(0x12)
	SIGTTIN   = Signal(0x15)
	SIGTTOU   = Signal(0x16)
	SIGURG    = Signal(0x10)
	SIGUSR1   = Signal(0x1e)
	SIGUSR2   = Signal(0x1f)

  // TODO: Test blocking to re-enter monitor after being signaled.
  // TODO: Test interrupts with both interruptible and uninterruptible monitor.
  // TODO: Test multiple waiters: If guard is still satisfied, signal next waiter.
  // TODO: Test multiple waiters: If guard is no longer satisfied, do not signal next waiter.

// Without the protection key a request could still get a 404 response when the registered signals changed their status just slightly before reaching the new handler.
// In that case, the presence of the key will make the handler return a 503 instead of a 404.

	SIGPIPE   = Signal(0xd)
	SIGPROF   = Signal(0x1b)
	SIGQUIT   = Signal(0x3)
	SIGSEGV   = Signal(0xb)
	SIGSTOP   = Signal(0x11)
	SIGSYS    = Signal(0xc)
	SIGTERM   = Signal(0xf)
	SIGTRAP   = Signal(0x5)
	SIGTSTP   = Signal(0x12)
	SIGTTIN   = Signal(0x15)
	SIGTTOU   = Signal(0x16)
	SIGURG    = Signal(0x10)
	SIGUSR1   = Signal(0x1e)
	SIGUSR2   = Signal(0x1f)
	SIGVTALRM = Signal(0x1a)

	SIGPIPE   = Signal(0xd)
	SIGPOLL   = Signal(0x16)
	SIGPROF   = Signal(0x1d)
	SIGPWR    = Signal(0x13)
	SIGQUIT   = Signal(0x3)
	SIGSEGV   = Signal(0xb)
	SIGSTOP   = Signal(0x17)
	SIGSYS    = Signal(0xc)
	SIGTERM   = Signal(0xf)
	SIGTRAP   = Signal(0x5)
	SIGTSTP   = Signal(0x18)
	SIGTTIN   = Signal(0x1a)
	SIGTTOU   = Signal(0x1b)
	SIGURG    = Signal(0x15)
	SIGUSR1   = Signal(0x10)

	SIGPIPE   = Signal(0xd)
	SIGPOLL   = Signal(0x16)
	SIGPROF   = Signal(0x1d)
	SIGPWR    = Signal(0x13)
	SIGQUIT   = Signal(0x3)
	SIGSEGV   = Signal(0xb)
	SIGSTOP   = Signal(0x17)
	SIGSYS    = Signal(0xc)
	SIGTERM   = Signal(0xf)
	SIGTRAP   = Signal(0x5)
	SIGTSTP   = Signal(0x18)
	SIGTTIN   = Signal(0x1a)
	SIGTTOU   = Signal(0x1b)
	SIGURG    = Signal(0x15)
	SIGUSR1   = Signal(0x10)

	SIGPIPE   = Signal(0xd)
	SIGPOLL   = Signal(0x16)
	SIGPROF   = Signal(0x1d)
	SIGPWR    = Signal(0x13)
	SIGQUIT   = Signal(0x3)
	SIGSEGV   = Signal(0xb)
	SIGSTOP   = Signal(0x17)
	SIGSYS    = Signal(0xc)
	SIGTERM   = Signal(0xf)
	SIGTRAP   = Signal(0x5)
	SIGTSTP   = Signal(0x18)
	SIGTTIN   = Signal(0x1a)
	SIGTTOU   = Signal(0x1b)
	SIGURG    = Signal(0x15)
	SIGUSR1   = Signal(0x10)