Is C++11's std::thread compatible with POSIX semaphores?

Question

我想通过使用标准 C++ std::thread 库在我的 C++ 应用程序中使用线程，但是你想使用信号量并且使用 C++20 的信号量是不可能的，我想知道是否 POSIX 信号量 <semaphore.h > 与 C++ STD 的线程兼容，或者我必须更改代码才能使用 POSIX 线程

Answer 1

The C++ standard library will implement std::thread as a wrapper over pthreads on POSIX systems, so using <semaphore.h> would be fine. Semaphores are usually implemented regardless of the specific threading interface, though the C standard library may do some book-keeping at the same time using pthreads.

For this reason, calling sem_wait() from a thread (whether it be a pthread_t or an std::thread) will have the same effect, though it may be better to just use pthreads, as they would be the most "compatible", especially since you are only targeting POSIX systems anyway.