I don't think the operations on the Buffer Zone need to be mutually exclusive. After all, the mutex semaphores have different in and out pointers. Can they operate on different buffers?

Http://www.cskaoyan.com/thread-6232-1-3.htmlproducer consumer AlgorithmThe problem is that operations on the buffer zone do not need to be mutually exclusive ~ Mutex semaphores in the Tang Zi notebook
After all, they all have different in and out pointers. Can they operate on different buffers? When looking at producer and consumer issues, we need to access critical resources (buffers) at the same time of the process.
Because the CPU stops executing each command, the response is interrupted. therefore, each process may be interrupted when executing a statement. therefore, it is entirely possible for producers and consumers to access the buffer zone at the same time. the buffer zone is an area of memory. at the same time, only one process can access the memory. in this way, there is a mutex between them.