shm_main_info
struct shm_main_info* shm_info;
struct shm_main_info;
daemon->shm_info = (struct shm_main_info*)calloc(1, shm_size);
shm_thread_is_first(struct shm_main_info* shm_info, int thread_num,
struct shm_main_info* shm_info = worker->daemon->shm_info;