# -*- coding: utf-8 -*-

import signal
import time


def handle(signum, frame):
    print("超时了")


# 注册信号
signal.signal(signal.SIGALRM, handle)

# 设置信号发送时间
signal.alarm(3)  # 开启闹钟信号

print("开启信号")

time.sleep(5)

print("关闭信号")

signal.alarm(0)  # 关闭闹钟信号
"""
sleep 2
开启信号
关闭信号

sleep 5
开启信号
超时了
关闭信号
"""

import signal

class TimeOutException(Exception):
    pass


def handle(signum, frame):
    raise TimeOutException("运行超时！")


def set_timeout(timeout, callback):
    def wrapper(func):
        def inner(*args, **kwargs):
            try:
                signal.signal(signal.SIGALRM, handle)
                signal.alarm(timeout)  # 开启闹钟信号
                rs = func(*args, **kwargs)
                signal.alarm(0)  # 关闭闹钟信号
                return rs
            except TimeOutException as e:
                callback()

        return inner

    return wrapper


def process_time():
    print("超时了")


@set_timeout(40, process_time)
def function():
    pass