APP安全秒杀

import threading
import time

class SeckillSystem:
    def __init__(self, stock):
        self.stock = stock
        self.lock = threading.Lock()

    def seckill(self, user_id):
        with self.lock:
            if self.stock > 0:
                self.stock -= 1
                print(f"User {user_id} successfully秒杀！剩余库存: {self.stock}")
            else:
                print(f"User {user_id} 秒杀失败，库存不足！")

# 模拟高并发场景
def simulate_seckill(system, user_id):
    system.seckill(user_id)

if __name__ == "__main__":
    seckill_system = SeckillSystem(stock=10)
    threads = []

    for i in range(20):
        t = threading.Thread(target=simulate_seckill, args=(seckill_system, i))
        threads.append(t)
        t.start()

    for t in threads:
        t.join()