28 lines
758 B
C
28 lines
758 B
C
#include <stdio.h>
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#include <pthread.h>
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#include <semaphore.h>
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#include <fcntl.h>
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#include <stdatomic.h>
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atomic_int semaphore_value = 5;
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sem_t *my_semaphore;
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int main(){
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my_semaphore = sem_open("/my_sem", O_CREAT, 0644, atomic_load(&semaphore_value));
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int sem_val = atomic_load(&semaphore_value);
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printf("Initial semaphore value: %d\n", sem_val);
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sem_post(my_semaphore);
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atomic_fetch_add(&semaphore_value, 1);
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sem_post(my_semaphore);
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atomic_fetch_add(&semaphore_value, 1);
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sem_post(my_semaphore);
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atomic_fetch_add(&semaphore_value, 1);
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sem_val = atomic_load(&semaphore_value);
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printf("Semaphore value after extra posts: %d\n", sem_val);
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sem_close(my_semaphore);
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sem_unlink("/my_sem");
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return 0;
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}
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