POS - Semaphore 2

// P1.c

#include <stdio.h>
#include <shared.h>

int main() {
        sem_t sem;
        sem_t empty;
        sem_t full;

        sem = sem_init(91011);
        empty = sem_init(91012);
        full = sem_init(91013);

        char *buff;
        char b;
        int i;
        buff = (char *)getmem(9101);

        for (char k = 'a'; k <= 'z'; ++k)
        {
                PS(full);
                PS(sem);
                printf("%c\n", *buff);
                VS(empty);
                VS(sem);
                for (i = 0; i < 1000000; i++);
        }

        sem_remove(sem);
        sem_remove(empty);
        sem_remove(full);

        printf("\nConsumer process ended\n");
}

// P2.c

#include <stdio.h>
#include <shared.h>

int main() {
        sem_t sem;
        sem_t empty;
        sem_t full;

        sem = sem_init(91011);
        empty = sem_init(91012);
        full = sem_init(91013);

        sem_set(sem, 1);
        sem_set(empty, 1);
        sem_set(full, 0);

        char *buff;
        char b;
        int i;
        buff = (char *)getmem(9101);

        for (b = 'a'; b <= 'z'; ++b) {
                PS(empty);
                PS(sem);
                *buff = b;
                VS(sem);
                VS(full);
                for (i = 0; i < 1000000; i++);
        }

        printf("Producer process ended\n");
}