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extended code to advanced input functionality

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hello 2025-02-09 03:33:42 +05:30
parent 58cf91a06d
commit 0fc6c74996
8 changed files with 34 additions and 27 deletions
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31
OS/C/theory/sync/semaextraposts.c
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@ -1,23 +1,28 @@
#include <stdio.h>
#include <pthread.h>
#include <semaphore.h>
#include <sys/semaphore.h>
#include <fcntl.h>
#include <stdatomic.h>
sem_t my_semaphore;
atomic_int semaphore_value = 5;
sem_t *my_semaphore;
int main(){
sem_init(&my_semaphore, 0, 5);
int sem_val;
sem_getvalue(&my_semaphore, &sem_val);
my_semaphore = sem_open("/my_sem", O_CREAT, 0644, atomic_load(&semaphore_value));
int sem_val = atomic_load(&semaphore_value);
printf("Initial semaphore value: %d\n", sem_val);
sem_post(my_semaphore);
atomic_fetch_add(&semaphore_value, 1);
sem_post(my_semaphore);
atomic_fetch_add(&semaphore_value, 1);
sem_post(my_semaphore);
atomic_fetch_add(&semaphore_value, 1);
sem_val = atomic_load(&semaphore_value);
printf("Semaphore value after extra posts: %d\n", sem_val);
sem_post(&my_semaphore);
sem_post(&my_semaphore);
sem_post(&my_semaphore);
sem_getvalue(&my_semaphore, &sem_val);
printf("Semaphore value after extra posts: %d\n", sem_val);
sem_destroy(&my_semaphore);
sem_close(my_semaphore);
sem_unlink("/my_sem");
return 0;
}