/*
 * time.h
 *
 * Struct and function declarations for dealing with time.
 */

#ifndef _TIME_H_
#define _TIME_H_

#include "_ansi.h"
#include <sys/cdefs.h>
#include <sys/reent.h>

#define __need_size_t
#define __need_NULL
#include <stddef.h>

/* Get _CLOCKS_PER_SEC_ */
#include <machine/time.h>

#ifndef _CLOCKS_PER_SEC_
#define _CLOCKS_PER_SEC_ 1000
#endif

#define CLOCKS_PER_SEC _CLOCKS_PER_SEC_
#define CLK_TCK        CLOCKS_PER_SEC

#include <sys/types.h>
#include <sys/timespec.h>

#if __POSIX_VISIBLE >= 200809
#include <xlocale.h>
#endif

_BEGIN_STD_C

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;
#ifdef __TM_GMTOFF
    long __TM_GMTOFF;
#endif
#ifdef __TM_ZONE
    const char* __TM_ZONE;
#endif
};

clock_t clock(void);
double difftime(time_t _time2, time_t _time1);
time_t mktime(struct tm* _timeptr);
time_t time(time_t* _timer);
#ifndef _REENT_ONLY
char* asctime(const struct tm* _tblock);
char* ctime(const time_t* _time);
struct tm* gmtime(const time_t* _timer);
struct tm* localtime(const time_t* _timer);
#endif
size_t strftime(char* __restrict _s, size_t _maxsize,
                const char* __restrict _fmt, const struct tm* __restrict _t);

#if __POSIX_VISIBLE >= 200809
extern size_t strftime_l(char* __restrict _s, size_t _maxsize,
                         const char* __restrict _fmt,
                         const struct tm* __restrict _t, locale_t _l);
#endif

char* asctime_r(const struct tm* __restrict, char* __restrict);
char* ctime_r(const time_t*, char*);
struct tm* gmtime_r(const time_t* __restrict, struct tm* __restrict);
struct tm* localtime_r(const time_t* __restrict, struct tm* __restrict);

_END_STD_C

#ifdef __cplusplus
extern "C"
{
#endif

#if __XSI_VISIBLE
    char* strptime(const char* __restrict, const char* __restrict,
                   struct tm* __restrict);
#endif
#if __GNU_VISIBLE
    char* strptime_l(const char* __restrict, const char* __restrict,
                     struct tm* __restrict, locale_t);
#endif

#if __POSIX_VISIBLE
    void tzset(void);
#endif
    void _tzset_r(struct _reent*);

    typedef struct __tzrule_struct {
        char ch;
        int m;
        int n;
        int d;
        int s;
        time_t change;
        long offset; /* Match type of _timezone. */
    } __tzrule_type;

    typedef struct __tzinfo_struct {
        int __tznorth;
        int __tzyear;
        __tzrule_type __tzrule[2];
    } __tzinfo_type;

    __tzinfo_type* __gettzinfo(void);

    /* getdate functions */

#ifdef HAVE_GETDATE
#if __XSI_VISIBLE >= 4
#ifndef _REENT_ONLY
#define getdate_err (*__getdate_err())
    int* __getdate_err(void);

    struct tm* getdate(const char*);
/* getdate_err is set to one of the following values to indicate the error.
     1  the DATEMSK environment variable is null or undefined,
     2  the template file cannot be opened for reading,
     3  failed to get file status information,
     4  the template file is not a regular file,
     5  an error is encountered while reading the template file,
     6  memory allication failed (not enough memory available),
     7  there is no line in the template that matches the input,
     8  invalid input specification  */
#endif /* !_REENT_ONLY */
#endif /* __XSI_VISIBLE >= 4 */

#if __GNU_VISIBLE
    /* getdate_r returns the error code as above */
    int getdate_r(const char*, struct tm*);
#endif /* __GNU_VISIBLE */
#endif /* HAVE_GETDATE */

/* defines for the opengroup specifications Derived from Issue 1 of the SVID. */
#if __SVID_VISIBLE || __XSI_VISIBLE
    extern __IMPORT long _timezone;
    extern __IMPORT int _daylight;
    extern int daylight;
    extern long timezone;
#endif
#if __POSIX_VISIBLE
    extern __IMPORT char* _tzname[2];

/* POSIX defines the external tzname being defined in time.h */
#ifndef tzname
#define tzname _tzname
#endif
#endif /* __POSIX_VISIBLE */

#ifdef __cplusplus
}
#endif

#include <sys/features.h>

#ifdef __CYGWIN__
#include <cygwin/time.h>
#endif /*__CYGWIN__*/

#if defined(_POSIX_TIMERS)

#include <signal.h>

#ifdef __cplusplus
extern "C"
{
#endif

    /* Clocks, P1003.1b-1993, p. 263 */

    int clock_settime(clockid_t clock_id, const struct timespec* tp);
    int clock_gettime(clockid_t clock_id, struct timespec* tp);
    int clock_getres(clockid_t clock_id, struct timespec* res);

    /* Create a Per-Process Timer, P1003.1b-1993, p. 264 */

    int timer_create(clockid_t clock_id, struct sigevent* __restrict evp,
                     timer_t* __restrict timerid);

    /* Delete a Per_process Timer, P1003.1b-1993, p. 266 */

    int timer_delete(timer_t timerid);

    /* Per-Process Timers, P1003.1b-1993, p. 267 */

    int timer_settime(timer_t timerid, int flags,
                      const struct itimerspec* __restrict value,
                      struct itimerspec* __restrict ovalue);
    int timer_gettime(timer_t timerid, struct itimerspec* value);
    int timer_getoverrun(timer_t timerid);

    /* High Resolution Sleep, P1003.1b-1993, p. 269 */

    int nanosleep(const struct timespec* rqtp, struct timespec* rmtp);

#ifdef __cplusplus
}
#endif
#endif /* _POSIX_TIMERS */

#if defined(_POSIX_CLOCK_SELECTION)

#ifdef __cplusplus
extern "C"
{
#endif

    int clock_nanosleep(clockid_t clock_id, int flags,
                        const struct timespec* rqtp, struct timespec* rmtp);

#ifdef __cplusplus
}
#endif

#endif /* _POSIX_CLOCK_SELECTION */

#ifdef __cplusplus
extern "C"
{
#endif

    /* CPU-time Clock Attributes, P1003.4b/D8, p. 54 */

    /* values for the clock enable attribute */

#define CLOCK_ENABLED  1 /* clock is enabled, i.e. counting execution time */
#define CLOCK_DISABLED 0 /* clock is disabled */

    /* values for the pthread cputime_clock_allowed attribute */

#define CLOCK_ALLOWED 1 /* If a thread is created with this value a */
    /*   CPU-time clock attached to that thread */
    /*   shall be accessible. */
#define CLOCK_DISALLOWED 0 /* If a thread is created with this value, the */
    /*   thread shall not have a CPU-time clock */
    /*   accessible. */

    /* Manifest Constants, P1003.1b-1993, p. 262 */

#define CLOCK_REALTIME (clockid_t)1

    /* Flag indicating time is "absolute" with respect to the clock
       associated with a time.  */

#define TIMER_ABSTIME 4

    /* Manifest Constants, P1003.4b/D8, p. 55 */

#if defined(_POSIX_CPUTIME)

    /* When used in a clock or timer function call, this is interpreted as
       the identifier of the CPU_time clock associated with the PROCESS
       making the function call.  */

#define CLOCK_PROCESS_CPUTIME_ID (clockid_t)2

#endif

#if defined(_POSIX_THREAD_CPUTIME)

    /*  When used in a clock or timer function call, this is interpreted as
        the identifier of the CPU_time clock associated with the THREAD
        making the function call.  */

#define CLOCK_THREAD_CPUTIME_ID (clockid_t)3

#endif

#if defined(_POSIX_MONOTONIC_CLOCK)

    /*  The identifier for the system-wide monotonic clock, which is defined
     *      as a clock whose value cannot be set via clock_settime() and which
     *          cannot have backward clock jumps. */

#define CLOCK_MONOTONIC (clockid_t)4

#endif

#define CLOCK_MONOTONIC_RAW    (clockid_t)5
#define CLOCK_REALTIME_COARSE  (clockid_t)6
#define CLOCK_MONOTONIC_COARSE (clockid_t)7

#if defined(_POSIX_CPUTIME)

    /* Accessing a Process CPU-time CLock, P1003.4b/D8, p. 55 */

    int clock_getcpuclockid(pid_t pid, clockid_t* clock_id);

#endif /* _POSIX_CPUTIME */

#if defined(_POSIX_CPUTIME) || defined(_POSIX_THREAD_CPUTIME)

    /* CPU-time Clock Attribute Access, P1003.4b/D8, p. 56 */

    int clock_setenable_attr(clockid_t clock_id, int attr);
    int clock_getenable_attr(clockid_t clock_id, int* attr);

#endif /* _POSIX_CPUTIME or _POSIX_THREAD_CPUTIME */

#ifdef __cplusplus
}
#endif

#endif /* _TIME_H_ */
