gcc原子内置函数：多线程环境中是否存在任何已知冲突？

Question

So, I want to avoid future problems when using __sync_fetch_and_add in a context of Boost-based multithreaded application.

Any chance that a low-level threading implementation used by Boost (pthreads here) would affect the functionality of buitins?

Answer 1

The builtins are the intrinsics.

They don't make assumptions about the libraries that will be used in applications.

There is no way it can interfere.

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(On a tangent: Some libraries, like Boost Asio, optionally can use C++11 atomics instead of boost::detail::atomic_count (doc) )