Implement the producer-consumer in such a way that the parent creates a shared memory segment using posix API (memory mapped file) and creates a producer thread with one routine to run, and a consumer child with another routine to run. Pass the name of the shared memory file as an argument to each thread. Does this solution require a mutex or semaphore, or does the file implementation take care of mutual exclusion? Can the producer and consumer threads write to the file at the same time?