from threading import Thread
from queue import Queue


class PipeWriterThread(Thread):
    def __init__(self, pipe_path):
        super().__init__()
        self._pipe_path = pipe_path
        self._write_queue = Queue()

    def write(self, message):
        self._write_queue.put(message, block=True)

    def run(self):
        while True:
            message = self._write_queue.get(block=True)
            if message is None:
                break
            with open(self._pipe_path, 'wb') as pipe:
                pipe.write(message)

    def stop(self):
        self._write_queue.put(None)
        self.join()