semaforki

#include <stdio.h>
#include <stdlib.h>
#include <sys/shm.h>
#include <sys/stat.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#include <sys/time.h>
#include <string.h>
#include <time.h>
#include <math.h>
#include "constants.h"
#include "sem.c"

typedef struct node
{
    int priority;
    char *data;
    struct node *next;
} node;

int main(int argc, char *argv[])
{
    int segmentSize;
    if (argc != 3)
    {
        printf("Wrong usage");
        exit(1);
    }
    int size = atoi(argv[2]);
    segmentSize = (size + 1) * sizeof(node);
    int queueId, mutexId, fullId, freeId;
    char *name = argv[1];
    node *queueHead, *queueTail;
    queueId = shmget(shmAKey, segmentSize, IPC_CREAT | IPC_EXCL | 0666);
    if (queueId < 0)
    {
        printf("Error: %s", strerror(errno));
        queueId = shmget(shmAKey, segmentSize, 0666);
    }

    queueHead = (node *)shmat(queueId, 0, 0);
    mutexId = semget(mutexAKey, 1, IPC_CREAT | IPC_EXCL | 0666);
    if (mutexId == -1)
    {
        mutexId = semget(mutexAKey, 1, 0666);
    }
    if (mutexId == -1)
    {
        printf("Mutex error\n");
    }
    fullId = semget(AFullKey, 1, IPC_CREAT | IPC_EXCL | 0666);
    if (fullId == -1)
    {
        fullId = semget(AFullKey, 1, 0666);
    }
    if (fullId == -1)
    {
        printf("Full error\n");
    }
    freeId = semget(AFreeKey, 1, IPC_CREAT | IPC_EXCL | 0666);
    if (freeId == -1)
    {
        freeId = semget(AFreeKey, 1, 0666);
    }
    if (freeId == -1)
    {
        printf("Free error\n");
    }
    semctl(freeId, 0, SETVAL, size);

    for (int i = 0; i < CYCLES; ++i)
    {
        struct sembuf sem = {0, -1, 0};
        printf("%d", semop(freeId, &sem, 0));
    }
    printf("%d", semctl(freeId, 0, GETVAL));

    semctl(mutexId, 1, IPC_RMID);
    semctl(fullId, 1, IPC_RMID);
    semctl(freeId, 1, IPC_RMID);
    shmctl(queueId, IPC_RMID, NULL);
}