当使用Win32线程模型时，MinGW-w64是否支持std :: thread开箱即用？ [英] Does MinGW-w64 support std::thread out of the box when using the Win32 threading model?

问题描述

在安装MinGW-w64工具链时，我选择了Win32线程模型，在阅读后，它提供比POSIX对应的更好的性能。我没有资格自己对此声明进行基准化，但这里有一个来源。

I have opted for the Win32 threading model when installing the MinGW-w64 toolchain, after reading that it provides better performance than the POSIX counterpart. I am not qualified for benchmarking this claim myself, but here's a source for it.

起初，我认为这个选项只会影响GCC运行时的内部工作，而不会阻止我在我的代码中使用C ++ 11线程，基于此答案和此评论由其他用户 rubenvb 。

然而，似乎不是这样。 $ std :: thread 支持在此MinGW-w64安装中似乎不存在。

At first I thought this option would only affect the inner workings of the GCC runtime, while not preventing me from using C++11 threads in my code, based on this answer and this comment by fellow user rubenvb.
However, this doesn't seem to be the case. std::thread support appears to be non-existent in this MinGW-w64 installation.

命令行中除了 -std = c ++ 11 之外没有其他选项的 g ++ 。

I am invoking g++ from the command line with no options other than -std=c++11.

此时，我不确定是否：

• rubenvb 是错误的，在POSIX线程模型下安装MinGW-w64以编译依赖于C ++ 11 线程库的代码;或


• 我完全误解了所有，或;


• std :: thread 实际上支持我的方案，它只是不直观。

• rubenvb was wrong, and it's actually necessary to install MinGW-w64 under the POSIX threading model in order to compile my code which depends on the C++11 thread library, or;
• I completely misunderstood it all, or;
• std::thread is actually supported in my scenario, it's just not intuitive.

我强调标题中的开箱即用部分。有一个名为 mingw-std-threads 的库，如此答案。

I reinforce the "out of the box" part in the title. There exists a library called mingw-std-threads, as presented in this answer. However, as a third-party option, it is not relevant to this question.

因此，截至今天（2016年5月），MinGW-w64 nativelly支持<$

So, as of today (May 2016), does MinGW-w64 nativelly support std::thread depending code, when installed with the Win32 internal threading model?

推荐答案

c $ c> std :: thread p>要使用MinGW-w64与Win32本机线程，您还必须安装 mingw-std-threads headers。

To use the MinGW-w64 with Win32 native threads you must also install the mingw-std-threads headers.

正如该页面所述，这是因为MinGW-w64是GCC的端口，但GCC不包括任何本机线程支持。相反，GCC安装通常通过gthreads或pthreads作为glibc的一部分来实现线程。 MinGW-w64不包括glibc的端口。 （而是使用MSVC运行时的组合，加上它自己的代码来填补空洞）。

As described on that page, this is because MinGW-w64 is a port of GCC, but GCC does not include any native thread support. Instead GCC installations typically implement threading via either gthreads or pthreads as a part of glibc. MinGW-w64 does not include a port of glibc. (Instead it uses a combination of the MSVC runtime, plus its own code to fill in holes).

也如在那页上所描述的，最新版本的MinGW-w64做包括pthreads的Win32端口，这解释了为什么你可以通过从MinGW-w64安装程序中选择pthread模型，线程工作开箱即用。

Also as described on that page, recent versions of MinGW-w64 do include a Win32 port of pthreads, which explains why you can have threads work "out of the box" by selecting the "pthread" model from the MinGW-w64 installer.

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