Consider the following code relating to condition variables from your textbook: and void thr_exit() ( Pthread_mutex lock (Gm); done = 1; Pthread_cond_signal (&c); Pthread_mutex_unlock (6m); void thr_join() { Pthread_mutex lock (4m); while (done == 0) Pthread_cond wait (&c, &m); Pthread_mutex unlock (6m); Note the presence of a • variable (done), • a mutex (m), • a condition variable (c), and • a while loop all of which are necessary to get this to work correctly. a. Please explain why we need the variable (i.e., what might occur or what additional code might be needed if we omit the variable) Please explain why we need the mutex (same comment) c. Please explain why we need the condition variable d. Please explain why we need a while loop instead of an if statement Please keep your answers short and to the point. You might wish to show a schedule that might occur without each of these, should that be the best way to explain it concisely.

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Linux

An operating system (OS) is the software which manages hardware and resources, like CPU, storage and memory. The OS bridges the applications and hardware and makes the connections between all of your software and the hardware resources.