没有 pthreads/sempahores、信号的 Unix 进程同步？
我正在尝试编写一个不使用 pthreads 或信号量库的程序。我想与信号进行一些同步。我在一些 Unix 书籍中读到过它们，但我仍然不太明白。我写了一些模拟程序设计/代码，这不是我的程序，但它给出了我如何尝试组织进程/信号的想法。这看起来是一个合理的解决方案吗？
程序流程：
Main 分叉随机次数，并在每个子进程中执行“程序”。程序为子级分配一个值，1 或 2（例如输入或输出等）。
我想要一种方法来同步这些孩子。我认为使用信号是可能的，从我读到的内容来看，我想做一些类似的事情：
如果子== 1，发送父（主）SIGUSR1，否则如果子== 2发送父（主）SIGUSR2。当父进程服务该信号时，则结束。
现在回到主要部分，我想组织这些传入信号。我一次只接受一种类型，所以如果一个孩子向我发送 SIGUSR1，我将阻止所有 SIGUSR2，或者如果一个孩子先向我发送 SIGUSR2，那么我将阻止所有 SIGUSR1。 Main 将接收信号并为该类型的所有信号提供服务，直到不再有该类型，然后它将检查/解锁其他类型并为任何该类型（如果存在）提供服务，否则 main 将等待更多信号。
这看起来像是信号的正确使用吗？这对于信号来说是否可能？
谢谢！
I am attempting to write a program that doesn't use pthreads or semaphore libraries. I want to do some synchronization with signals. I have read about them in a few Unix books, but I still don't quite get it. I wrote up some mock program design/code, this isn't my program but it gives an idea of how I am trying to organize processes/signals. Does this seem like a plausible solution?
Program Flow:
Main forks a random number of times, and executes "program" in each child. The program assigns a value to the child, 1 or 2 (such as input or output etc.).
I want a way to synchronize these children. I thought using signals could be possible, and from what I read I would want to do something like:
If child == 1, send parent (main) SIGUSR1, else if child == 2 send parent (main) SIGUSR2. When the parent services the signal, then end.
Now back in main I want to organize these incoming signals. I would only accept one type at a time, so if a child sends me SIGUSR1, I will block all SIGUSR2s, or if a child sends me SIGUSR2 first then I block all SIGUSR1s. Main will receive the signal and service all signals of that type until there are no more of that type, then it will check/unblock the other type and service any of that type if they exist, else main will wait for more signals.
Does this seem like a proper use of signals and is this even possible with signals?
Thanks!
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（1）
您没有说出为什么您想要使用信号。您只是想弄清楚信号是如何工作的吗？
我不会采用您提出的那种考虑到信号的设计。你没有说孩子们在做什么，但我可能会使用管道、套接字，或者消息队列。
如果您可以添加一些有关您的高级目标的信息，我也许可以为您提供一些更好的方向。
You don't say why you want to use signals. Are you just trying to figure out how signals work?
I wouldn't approach the sort of design you've presented with signals in mind. You don't say what the children are doing, but I might use pipes, or sockets, or perhaps message queues.
If you can add some information about your high-level goals, I may be able to offer you some better direction.