OS signaling

#ifndef __LIST_H_ #define __LIST_H_ #include <pthread.h> typedef struct list_elem { struct list_elem *prev; struct list_elem *next; void *info; } list_elem; typedef struct thread_info_list { list_elem *head; list_elem *tail; pthread_mutex_t lock; } thread_info_list; int list_size(thread_info_list *list); int list_insert_head(thread_info_list *list, list_elem *new); int list_insert_tail(thread_info_list *list, list_elem *new); int list_remove(thread_info_list *list, list_elem *new); void print_list(thread_info_list *list); #endif /* __LIST_H_ */