Function ketama_sem_init

libCacheSim/dataStructure/ketama/ketama.c:161–189

\brief Initialize a semaphore. * \param key Semaphore key to use. * \return The freshly allocated semaphore handle. */

  * \param key Semaphore key to use.
  * \return The freshly allocated semaphore handle. */
static int
ketama_sem_init( key_t key )
{
    if (sem_ids == NULL) {
        init_sem_id_tracker();
    }

    int sem_set_id;

    sem_set_id = semget( key, 1, 0 );
	track_sem_id(sem_set_id);

    if ( sem_set_id == -1 )
    {
        // create a semaphore set with ID SEM_ID
        sem_set_id = semget( key, 1, IPC_CREAT | 0666 );
        track_sem_id(sem_set_id);

		if ( sem_set_id == -1 )
        {
            strcpy( k_error, "Could not open semaphore!" );
            return 0;
        }

        ketama_sem_unlock( sem_set_id );
    }

    return sem_set_id;
}


/* ketama.h does not expose this function */