c++ - 在线程之间创建 'synchronization point'

Question

我有几个 boost::threads，它们都执行相同的功能。

void foo(){
    //Lock Mutex
    //Do some stuffs, part 1
    //Unlock Mutex
    //Do some stuffs, part 2
    //Lock Mutex
    //Do some stuffs, part 3
    //Unlock Mutex
}

为了让我的应用程序正常工作，有必要在并行执行第 2 部分之前，所有线程都已完成第 1 部分的执行。我找不到任何可以让我做到这一点的机制……我是不是漏掉了什么？

谢谢。

Answer 1

使用 Boost 障碍。官方文档定义:

A barrier is a simple concept. Also known as a rendezvous, it is a synchronization point between multiple threads. The barrier is configured for a particular number of threads (n), and as threads reach the barrier they must wait until all n threads have arrived. Once the n-th thread has reached the barrier, all the waiting threads can proceed, and the barrier is reset.

摘自here .