from select import select;
from socket import *;

class Kernel:
    def __init__(self):
        self.threads = [];
        self.timeouts = [];
        self.read = [];
        self.write = [];
        self.readh = {};
        self.writeh = {};

    def run(self):
        while 1:
            # calculate desired timeout
            
            # select
            (can_read, can_write) = select(self.read, self.write, none, timeout);
            
            # write
            for h in can_write:
                self.writeh[h](h);

            # read
            for h in can_read:
                self.readh[h](h);

            # timeouts


            # threads