pthread_create 中的多个参数 [英] Multiple argument in pthread_create

问题描述

根据pthread_create man page，该函数的参数是:

According to pthread_create man page, the argument of the function is:

int pthread_create(pthread_t *thread, const pthread_attr_t *attr,
                      void *(*start_routine) (void *), void *arg);

关于 void *arg，我只是想知道我是否可以向它传递多个参数，因为我编写的函数需要 2 个参数.

regarding the void *arg, I just wonder if I can pass multiple argument to it, because the function that I write requires 2 arguments.

推荐答案

使用 void* 你可以传递你选择的结构:

With your void* you can pass a struct of your choosing:

struct my_args {
  int arg1;
  double arg2;
};

这有效地允许您传入任意参数.您的线程启动例程除了解压缩那些以调用真正的线程启动例程(它本身可能来自该结构)之外，什么也做不了.

This effectively allows you to pass arbitrary arguments in. Your thread start routine can do nothing other than un-pack those to call the real thread start routine (which could in itself come from that struct).

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