std :: this_thread :: yield（）用法？ [英] std::this_thread::yield() usage?

问题描述

有人可以在c ++应用程序中提供 std :: this_thread :: yield（）的现实例子吗？

Can someone provide real-life example of std::this_thread::yield() usage in c++ application?

推荐答案

我在执行std :: lock时使用了yield，在这里：

I used yield in the implementation of std::lock, found here:

http://llvm.org/svn/llvm-project/libcxx/trunk/include/mutex

事实证明，当一次锁定多个锁/互斥锁时，如果你没有得到一个，你可以使应用程序更快

It turns out that when locking multiple locks/mutexes at a time, when you fail to get one, you can make the application faster by using yield prior to trying the locks/mutexes in a different order.

在这个源代码中，我实际上调用 sched_yield（） 。但这只是为了获得头依赖的方式，我想要的方式。在这个平台上 std :: this_thread :: yield（）只不过是调用 sched_yield（）：

In this source code I'm actually calling sched_yield(). But that is only for the purpose of getting the header dependency the way I wanted it. On this platform std::this_thread::yield() is nothing more than a call to sched_yield():

http://llvm.org/ svn / llvm-project / libcxx / trunk / include / thread

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