42 lines
988 B
C
42 lines
988 B
C
#ifndef LIBRARIES
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#define LIBRARIES
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#define _GNU_SOURCE
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#include <fcntl.h> ///< For O_* constants *
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#endif
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#include <semaphore.h> ///< For semaphores
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#define FREE_SEM_NAME "/11777707_free"
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#define USED_SEM_NAME "/11777707_used"
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#define MUTEX_NAME "/11777707_mutex"
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static sem_t *free_sem;
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static sem_t *used_sem;
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static sem_t *mutex;
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sem_t * open_sem(char *sem_name, size_t sem_size) {
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sem_t *res = sem_open(sem_name, O_CREAT | O_EXCL, 0600, sem_size);
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if(res == SEM_FAILED) {
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fprintf(stderr, "ERROR: Failed opening semaphore\n");
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exit(EXIT_FAILURE);
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}
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return res;
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}
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void close_sem(sem_t *sem) {
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if(sem_close(sem) < 0) {
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fprintf(stderr, "ERROR: Failed closing semaphore\n");
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exit(EXIT_FAILURE);
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}
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}
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void destroy_sem(char *sem_name) {
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if(sem_unlink(sem_name) < 0) {
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fprintf(stderr, "ERROR: Failed closing semaphore\n");
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exit(EXIT_FAILURE);
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}
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}
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