跨平台的具有非阻塞控制台输入的方式 [英] Cross-platform way of having non-blocking console input

问题描述

我需要一种以非阻塞方式调用std :: cin的交叉平台方法。我知道这是可能的线程，但也许有一个更好的选择？

I need a crossplatform way of calling std::cin in non blocking way. I know it's possible with threads, but maybe there is a better option? Threds seem to be overkill for this.

推荐答案

标准C和C ++不提供任何方法来执行非阻塞I / O。通常，C和C ++运行时环境在用户按下< ENTER> 键之前根本看不到任何输入。

Standard C and C++ do not provide any means to do non blocking I/O. Typically, the C and C++ runtime environment does not see any input at all until the user has pressed the <ENTER> key.

所以，唯一的选项是真正使用单独的线程来读取输入，或使用平台特定的方法来做非阻塞输入（可能包装，所以你可以很容易地替换该部分时移植到不同的平台。像 ncurses 这样的库提供了为许多平台预先包装的这些输入法）。

So, the only options are really to use a separate thread to read the input, or to use platform-specific methods to do the non-blocking input (possibly wrapped so you can easily replace that part when porting to a different platform. Libraries like ncurses provide these input methods pre-wrapped for a number of platforms).

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