在g ++是C ++ 11线程模型使用pthreads在后台？ [英] In g++ is C++ 11 thread model using pthreads in the background?

问题描述

我只是试着在 g ++ 4.6 和 C ++ 11 功能。
每次我编译一个简单的线程代码使用 -std = c ++ 0x 标志，它崩溃与分段错误或它只是抛出一些奇怪的异常。 / p>

我读了一些有关 C ++ 11 线程的问题，我意识到，我还需要使用 -pthread 标志来正确编译代码。使用 -pthread 工作正常，我能够运行线程代码。

我的问题是， code> C ++ 11 多线程模型在后台使用 Pthreads ？
或者是从头开始写的？

我不知道是否有任何成员 gcc 贡献者，但我只是好奇。

解决方案

如果您运行 g ++ -v 的有关如何配置的信息。其中一个通常是一个看起来像

的线

 线程模型：posix 
  

这意味着它被配置为使用pthreads作为其线程库（libstdc ++中的std :: thread），这意味着您还需要使用任何您的系统上的pthread可能需要的标志（ -pthread 在Linux上）。

做标准，它只是g ++

实现标准的细节

I am just trying my hands on g++ 4.6 and C++11 features. Every time I compile a simple threading code using -std=c++0x flag, either it crashes with segmentation fault or it just throws some weird exception.

I read some questions related to C++11 threads and I realized that, I also need to use -pthread flag to compile the code properly. Using -pthread worked fine and I was able to run the threaded code.

My question is, whether the C++11 multi-threading model uses Pthreads in the background? Or is it written from the scratch?

I don't know if any of the members are gcc contributors but I am just curious.

解决方案

If you run g++ -v it will give you a bunch of information about how it was configured. One of those things will generally be a line that looks like

Thread model: posix

which means that it was configured to use pthreads for its threading library (std::thread in libstdc++), and which means you also need to use any flags that might be required for pthreads on your system (-pthread on Linux).

This has nothing specific to do with the standard, its just a detail of how the standard is implemented by g++

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