multithreading

https://www.geeksforgeeks.org/cpp/multithreading-in-cpp/

Implementing a Thread-Safe Singleton Pattern in C++ https://medium.com/@tusharmalhotra_81114/implementing-a-thread-safe-singleton-pattern-in-c-9a5ec0efb520

<pthread.h> - 1995 - It is not native to Windows but can be added via third-party libraries like pthreads-win32 1996-PThreads Primer. A Guide to Multithreaded Programming

C11 (<threads.h>) Note that many compilers (like MSVC) may have limited support for this specific C header compared to the C++

The error threads.h: No such file or directory occurs because the C11 <threads.h> library is optional and is not natively included in most MinGW distributions

C11 or C++20 ()

Memory Model

https://www.geeksforgeeks.org/cpp/memory-model-in-cpp-11/