The Mutex thing kind of makes sense. std::mutex came in at C++11, while Microsoft's CreateMutex call goes back to at least Windows 95. "Mutex" just means "a par

The Mutex thing kind of makes sense. std::mutex came in at C++11, while Microsoft's CreateMutex call goes back to at least Windows 95. "Mutex" just means "a particular type of lock", it doesn't say anything about the implementation, nor about the performance. It'd be dangerous to assume the performance characteristics of C++'s std::mutex and Rust's std::sync::mutex are anything alike either. fflush and FlushFileBuffers both just happen to have "flush" in the name. The fact someone decided that fflush doesn't actually flush the file buffer and added fsync to actually flush the buffers, does make for a very frustrating experience, but I find most of the POSIX API to be like that. See also: sync(void) vs fsync(int fd) vs syncfs(int fd).