time.h

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#pragma once
 
#include "stddef.h"
 
#define ITIMER_REAL 0
#define ITIMER_VIRTUAL 1
#define ITIMER_PROF 2
 
typedef unsigned int time_t;
 
typedef struct tm {
    int tm_sec;
    int tm_min;
    int tm_hour;
    int tm_mday;
    int tm_mon;
    int tm_year;
    int tm_wday;
    int tm_yday;
    int tm_isdst;
} tm_t;
 
typedef struct timeval {
    time_t tv_sec;  
    time_t tv_usec; 
} timeval_t;
 
typedef struct itimerval {
    struct timeval it_interval; 
    struct timeval it_value;    
} itimerval_t;
 
typedef struct timespec {
    time_t tv_sec; 
    long tv_nsec;  
} timespec_t;
 
time_t time(time_t *t);
 
time_t difftime(time_t time1, time_t time2);
 
tm_t *localtime(const time_t *timep);
 
size_t strftime(char *s, size_t max, const char *format, const tm_t *tm);
 
int nanosleep(const struct timespec *req, struct timespec *rem);
 
unsigned int sleep(unsigned int seconds);
 
int getitimer(int which, struct itimerval *curr_value);
 
int setitimer(int which, const struct itimerval *new_value, struct itimerval *old_value);