C Multi-threading Using Semaphores to Allow Multiple Processes Into the Critical Section:

Hello, I need a program that will generate 5 threads. 4 of them will be worker threads that have a message and a priority, and 1 of them will be a master thread that exists in the critical section to analyze the priority of the other 4 threads. All 5 threads will enter the critical section at once, and the master thread will then choose the thread with the highest priority. The other 3 threads are then kicked out of the critical section and the master thread prints out the message that the thread with the highest priority has.

This must be written using pthreads and semaphores. You must demonstrate that it works by providing an ouput of the master thread printing the message of the thread with the highest priority.

Input for each thread will be of the following format: ABCD

AB = message

C = priority (0-9, 0 being highest)

D = Thread ID (0-3).

The priorities cannot be the same.