是否有睡眠（c）中的方法吗？ [英] Is there an alternative for sleep() in C?

问题描述

在传统的嵌入式编程，我们将给予延时功能，像这样：

In traditional embedded programming, we will give a delay function like so:

for(i=0;i<255;i++)
   for(j=0;j<255;j++);

在微处理器的看法，这是睡眠（）函数是如何工作的？

In the microprocessor's view, is this how the sleep() function works?

有没有在C？

推荐答案

替代依赖于你正在尝试做的，什么操作系统你都在。

Alternatives depend in what you are trying to do and what OS you are on.

如果你只是想浪费时间，那么这些可能会帮助：

If you just want to waste time, then these might help:

在大多数Unix类型的系统，你会发现一个'usleep功能，这或多或少像更高分辨率的睡眠。小心那一个，因为它通常无法入睡仅为1微秒。

On most unix-type systems you'll find a 'usleep' function, which is more or less like sleep with greater resolution. Be careful with that one because it usually can not sleep for just one microsecond.

在某些UNIX类系统，选择系统调用可以与所有文件描述符集中使用，以获得一个相当准确的分一秒等待0。

On some unix-type systems, the select system call can be used with all file descriptor sets zero in order to get a fairly accurate sub-second wait.

在Windows系统中，你有睡眠，这是pretty大致相同，但采取的毫秒数。

On windows systems, you have Sleep, which is pretty much the same, but taking a number of milliseconds.

在一个多任务操作系统，睡眠功能有时可以作为一个参数给出0。这通常会导致函数放弃它的时间片，但如果没有其他的任务准备运行被立即重新安排。

In a multi-tasking operating system, a sleep function can sometimes be given 0 as a parameter. This generally causes the function to give up it's timeslice, but be re-scheduled immediately if no other task is ready to run.

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