from signal import pthread_kill
from signal import signal as sigsignal

class SignalRouter:
    def __init__(self):
        self.signal_thread_dictionary = {}

    def __route_signal(self, signal, frame):
        for thread_ident in self.signal_thread_dictionary[signal]:
            pthread_kill(thread_ident, signal)

    def register_signal_thread(self, signal, thread_ident):
        self.signal_thread_dictionary.setdefault(signal, []).append(thread_ident)
        sigsignal(signal, self.__route_signal)