typedef unsigned long pid_t;
typedef unsigned long tid_t;
typedef signed long long int time_t;
typedef unsigned long pid_t;
typedef unsigned long tid_t;
typedef signed long long int time_t;
extern void FD_SET(int fd, fd_set *fdsetp);
extern int FD_ISSET(int fd, fd_set *fdsetp);
extern void FD_SET(int fd, fd_set *fdsetp);
extern int FD_ISSET(int fd, fd_set *fdsetp);