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glibc/include/time.h
YunQiang Su a9acb7b39e Define in_int32_t_range to check if the 64 bit time_t syscall should be used 
Currently glibc uses in_time_t_range to detects time_t overflow,
and if it occurs fallbacks to 64 bit syscall version.

The function name is confusing because internally time_t might be
either 32 bits or 64 bits (depending on __TIMESIZE).

This patch refactors the in_time_t_range by replacing it with
in_int32_t_range for the case to check if the 64 bit time_t syscall
should be used.

The in_time_t range is used to detect overflow of the
syscall return value.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-11-17 14:35:13 -03:00

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#ifndef _TIME_H
#include <time/time.h>
#ifndef _ISOMAC
# include <bits/types/struct_timeval.h>
# include <struct___timespec64.h>
# include <struct___timeval64.h>
# include <bits/types/locale_t.h>
# include <stdbool.h>
# include <time/mktime-internal.h>
# include <sys/time.h>
# include <time-clockid.h>
# include <sys/time.h>
# include <stdint.h>
extern __typeof (strftime_l) __strftime_l;
libc_hidden_proto (__strftime_l)
extern __typeof (strptime_l) __strptime_l;
libc_hidden_proto (asctime)
libc_hidden_proto (mktime)
libc_hidden_proto (timelocal)
libc_hidden_proto (localtime)
libc_hidden_proto (strftime)
libc_hidden_proto (strptime)
extern __typeof (clock_gettime) __clock_gettime;
libc_hidden_proto (__clock_gettime)
extern __typeof (clock_settime) __clock_settime;
libc_hidden_proto (__clock_settime)
extern __typeof (clock_getres) __clock_getres;
libc_hidden_proto (__clock_getres)
extern __typeof (clock_nanosleep) __clock_nanosleep;
libc_hidden_proto (__clock_nanosleep);
#ifdef __linux__
extern __typeof (clock_adjtime) __clock_adjtime;
libc_hidden_proto (__clock_adjtime);
#endif
/* Now define the internal interfaces. */
struct tm;
/* Defined in mktime.c. */
extern const unsigned short int __mon_yday[2][13] attribute_hidden;
/* Defined in localtime.c. */
extern struct tm _tmbuf attribute_hidden;
/* Defined in tzset.c. */
extern char *__tzstring (const char *string) attribute_hidden;
extern int __use_tzfile attribute_hidden;
extern void __tzfile_read (const char *file, size_t extra,
char **extrap) attribute_hidden;
extern void __tzfile_compute (__time64_t timer, int use_localtime,
long int *leap_correct, int *leap_hit,
struct tm *tp) attribute_hidden;
extern void __tzfile_default (const char *std, const char *dst,
int stdoff, int dstoff)
attribute_hidden;
extern void __tzset_parse_tz (const char *tz) attribute_hidden;
extern void __tz_compute (__time64_t timer, struct tm *tm, int use_localtime)
__THROW attribute_hidden;
#if __TIMESIZE == 64
# define __itimerspec64 itimerspec
#else
/* The glibc's internal representation of the struct itimerspec. */
struct __itimerspec64
{
struct __timespec64 it_interval;
struct __timespec64 it_value;
};
#endif
#if __TIMESIZE == 64
# define __utimbuf64 utimbuf
# define __itimerval64 itimerval
#else
/* The glibc Y2038-proof struct __utimbuf64 structure for file's access
and modification time values. */
struct __utimbuf64
{
__time64_t actime; /* Access time. */
__time64_t modtime; /* Modification time. */
};
/* The glibc's internal representation of the struct itimerval. */
struct __itimerval64
{
struct __timeval64 it_interval;
struct __timeval64 it_value;
};
#endif
#if __TIMESIZE == 64
# define __getitimer64 __getitimer
# define __setitimer64 __setitimer
#else
extern int __getitimer64 (enum __itimer_which __which,
struct __itimerval64 *__value);
libc_hidden_proto (__getitimer64)
extern int __setitimer64 (enum __itimer_which __which,
const struct __itimerval64 *__restrict __new,
struct __itimerval64 *__restrict __old);
libc_hidden_proto (__setitimer64)
#endif
#if __TIMESIZE == 64
# define __ctime64 ctime
#else
extern char *__ctime64 (const __time64_t *__timer) __THROW;
libc_hidden_proto (__ctime64)
#endif
#if __TIMESIZE == 64
# define __ctime64_r ctime_r
#else
extern char *__ctime64_r (const __time64_t *__restrict __timer,
char *__restrict __buf) __THROW;
libc_hidden_proto (__ctime64_r)
#endif
#if __TIMESIZE == 64
# define __localtime64 localtime
#else
extern struct tm *__localtime64 (const __time64_t *__timer);
libc_hidden_proto (__localtime64)
#endif
extern struct tm *__localtime_r (const time_t *__timer,
struct tm *__tp) attribute_hidden;
#if __TIMESIZE != 64
extern struct tm *__localtime64_r (const __time64_t *__timer,
struct tm *__tp);
libc_hidden_proto (__localtime64_r)
extern __time64_t __mktime64 (struct tm *__tp) __THROW;
libc_hidden_proto (__mktime64)
#endif
extern struct tm *__gmtime_r (const time_t *__restrict __timer,
struct tm *__restrict __tp);
libc_hidden_proto (__gmtime_r)
#if __TIMESIZE == 64
# define __gmtime64 gmtime
#else
extern struct tm *__gmtime64 (const __time64_t *__timer);
libc_hidden_proto (__gmtime64)
extern struct tm *__gmtime64_r (const __time64_t *__restrict __timer,
struct tm *__restrict __tp);
libc_hidden_proto (__gmtime64_r)
extern __time64_t __timegm64 (struct tm *__tp) __THROW;
libc_hidden_proto (__timegm64)
#endif
#if __TIMESIZE == 64
# define __clock_settime64 __clock_settime
#else
extern int __clock_settime64 (clockid_t clock_id,
const struct __timespec64 *tp) __nonnull((2));
libc_hidden_proto (__clock_settime64)
#endif
#if __TIMESIZE == 64
# define __clock_getres64 __clock_getres
#else
extern int __clock_getres64 (clockid_t clock_id,
struct __timespec64 *tp);
libc_hidden_proto (__clock_getres64);
#endif
#if __TIMESIZE == 64
# define __utime64 __utime
# define __utimes64 __utimes
# define __utimensat64 __utimensat
#else
extern int __utime64 (const char *file, const struct __utimbuf64 *times);
libc_hidden_proto (__utime64)
extern int __utimes64 (const char *file, const struct __timeval64 tvp[2]);
libc_hidden_proto (__utimes64)
extern int __utimensat64 (int fd, const char *file,
const struct __timespec64 tsp[2], int flags);
libc_hidden_proto (__utimensat64);
#endif
extern int __utimensat64_helper (int fd, const char *file,
const struct __timespec64 tsp[2], int flags);
libc_hidden_proto (__utimensat64_helper);
extern int __futimesat (int __fd, const char *__file, const struct timeval __tvp[2]);
#if __TIMESIZE == 64
# define __futimes64 __futimes
# define __futimesat64 __futimesat
# define __lutimes64 __lutimes
# define __futimens64 __futimens
#else
extern int __futimes64 (int fd, const struct __timeval64 tvp64[2]);
libc_hidden_proto (__futimes64);
extern int __futimesat64 (int fd, const char *file,
const struct __timeval64 tvp[2]);
libc_hidden_proto (__futimesat64);
extern int __lutimes64 (const char *file, const struct __timeval64 tvp64[2]);
libc_hidden_proto (__lutimes64);
extern int __futimens64 (int fd, const struct __timespec64 tsp[2]);
libc_hidden_proto (__futimens64);
#endif
#if __TIMESIZE == 64
# define __timer_gettime64 __timer_gettime
# define __timerfd_gettime64 __timerfd_gettime
#else
extern int __timer_gettime64 (timer_t timerid, struct __itimerspec64 *value);
extern int __timerfd_gettime64 (int fd, struct __itimerspec64 *value);
# if PTHREAD_IN_LIBC
libc_hidden_proto (__timer_gettime64)
# else
librt_hidden_proto (__timer_gettime64)
# endif
libc_hidden_proto (__timerfd_gettime64);
#endif
#if __TIMESIZE == 64
# define __timer_settime64 __timer_settime
# define __timerfd_settime64 __timerfd_settime
#else
extern int __timer_settime64 (timer_t timerid, int flags,
const struct __itimerspec64 *value,
struct __itimerspec64 *ovalue);
extern int __timerfd_settime64 (int fd, int flags,
const struct __itimerspec64 *value,
struct __itimerspec64 *ovalue);
# if PTHREAD_IN_LIBC
libc_hidden_proto (__timer_settime64)
#else
librt_hidden_proto (__timer_settime64)
#endif
libc_hidden_proto (__timerfd_settime64);
#endif
#if __TIMESIZE == 64
# define __sched_rr_get_interval64 __sched_rr_get_interval
#else
extern int __sched_rr_get_interval64 (pid_t pid, struct __timespec64 *tp);
libc_hidden_proto (__sched_rr_get_interval64);
#endif
#if __TIMESIZE == 64
# define __settimeofday64 __settimeofday
# define __gettimeofday64 __gettimeofday
#else
extern int __settimeofday64 (const struct __timeval64 *tv,
const struct timezone *tz);
libc_hidden_proto (__settimeofday64)
extern int __gettimeofday64 (struct __timeval64 *restrict tv,
void *restrict tz);
libc_hidden_proto (__gettimeofday64)
#endif
/* Compute the `struct tm' representation of T,
offset OFFSET seconds east of UTC,
and store year, yday, mon, mday, wday, hour, min, sec into *TP.
Return nonzero if successful. */
extern int __offtime (__time64_t __timer,
long int __offset,
struct tm *__tp) attribute_hidden;
extern char *__asctime_r (const struct tm *__tp, char *__buf)
attribute_hidden;
extern void __tzset (void) attribute_hidden;
/* Prototype for the internal function to get information based on TZ. */
extern struct tm *__tz_convert (__time64_t timer, int use_localtime,
struct tm *tp) attribute_hidden;
extern int __nanosleep (const struct timespec *__requested_time,
struct timespec *__remaining);
hidden_proto (__nanosleep)
#if __TIMESIZE == 64
# define __nanosleep64 __nanosleep
#else
extern int __nanosleep64 (const struct __timespec64 *__requested_time,
struct __timespec64 *__remaining);
hidden_proto (__nanosleep64)
#endif
extern int __getdate_r (const char *__string, struct tm *__resbufp);
libc_hidden_proto (__getdate_r);
/* Determine CLK_TCK value. */
extern int __getclktck (void) attribute_hidden;
/* strptime support. */
extern char * __strptime_internal (const char *rp, const char *fmt,
struct tm *tm, void *statep,
locale_t locparam) attribute_hidden;
#if __TIMESIZE == 64
# define __difftime64 __difftime
#else
extern double __difftime64 (__time64_t time1, __time64_t time0);
libc_hidden_proto (__difftime64)
#endif
extern double __difftime (time_t time1, time_t time0);
#if __TIMESIZE == 64
# define __clock_nanosleep_time64 __clock_nanosleep
# define __clock_gettime64 __clock_gettime
# define __timespec_get64 __timespec_get
# define __timespec_getres64 __timespec_getres
#else
extern int __clock_nanosleep_time64 (clockid_t clock_id,
int flags, const struct __timespec64 *req,
struct __timespec64 *rem);
libc_hidden_proto (__clock_nanosleep_time64)
extern int __clock_gettime64 (clockid_t clock_id, struct __timespec64 *tp) __nonnull((2));
libc_hidden_proto (__clock_gettime64)
extern int __timespec_get64 (struct __timespec64 *ts, int base);
libc_hidden_proto (__timespec_get64)
extern int __timespec_getres64 (struct __timespec64 *ts, int base);
libc_hidden_proto (__timespec_getres64)
#endif
#if __TIMESIZE == 64
# define __time64 __time
#else
extern __time64_t __time64 (__time64_t *timer);
libc_hidden_proto (__time64)
#endif
/* Use in the clock_* functions. Size of the field representing the
actual clock ID. */
#define CLOCK_IDFIELD_SIZE 3
/* Check whether T fits in int32_t, assume all usages are for
sizeof(time_t) == 32. */
static inline bool
in_int32_t_range (__time64_t t)
{
int32_t s = t;
return s == t;
}
/* Check whether T fits in time_t. */
static inline bool
in_time_t_range (__time64_t t)
{
time_t s = t;
return s == t;
}
/* Convert a known valid struct timeval into a struct __timespec64. */
static inline struct __timespec64
valid_timeval_to_timespec64 (const struct timeval tv)
{
struct __timespec64 ts64;
ts64.tv_sec = tv.tv_sec;
ts64.tv_nsec = tv.tv_usec * 1000;
return ts64;
}
/* Convert a known valid struct timeval into a struct __timeval64. */
static inline struct __timeval64
valid_timeval_to_timeval64 (const struct timeval tv)
{
struct __timeval64 tv64;
tv64.tv_sec = tv.tv_sec;
tv64.tv_usec = tv.tv_usec;
return tv64;
}
/* Convert a valid and within range of struct timeval, struct
__timeval64 into a struct timeval. */
static inline struct timeval
valid_timeval64_to_timeval (const struct __timeval64 tv64)
{
struct timeval tv;
tv.tv_sec = (time_t) tv64.tv_sec;
tv.tv_usec = (suseconds_t) tv64.tv_usec;
return tv;
}
/* Convert a struct __timeval64 into a struct __timespec64. */
static inline struct __timespec64
timeval64_to_timespec64 (const struct __timeval64 tv64)
{
struct __timespec64 ts64;
ts64.tv_sec = tv64.tv_sec;
ts64.tv_nsec = tv64.tv_usec * 1000;
return ts64;
}
/* Convert a known valid struct timespec into a struct __timespec64. */
static inline struct __timespec64
valid_timespec_to_timespec64 (const struct timespec ts)
{
struct __timespec64 ts64;
ts64.tv_sec = ts.tv_sec;
ts64.tv_nsec = ts.tv_nsec;
return ts64;
}
/* Convert a valid and within range of struct timespec, struct
__timespec64 into a struct timespec. */
static inline struct timespec
valid_timespec64_to_timespec (const struct __timespec64 ts64)
{
struct timespec ts;
ts.tv_sec = (time_t) ts64.tv_sec;
ts.tv_nsec = ts64.tv_nsec;
return ts;
}
/* Convert a valid and within range of struct timeval struct
__timespec64 into a struct timeval. */
static inline struct timeval
valid_timespec64_to_timeval (const struct __timespec64 ts64)
{
struct timeval tv;
tv.tv_sec = (time_t) ts64.tv_sec;
tv.tv_usec = ts64.tv_nsec / 1000;
return tv;
}
/* Convert a struct __timespec64 into a struct __timeval64. */
static inline struct __timeval64
timespec64_to_timeval64 (const struct __timespec64 ts64)
{
struct __timeval64 tv64;
tv64.tv_sec = ts64.tv_sec;
tv64.tv_usec = ts64.tv_nsec / 1000;
return tv64;
}
/* A version of 'struct timeval' with 32-bit time_t
and suseconds_t. */
struct __timeval32
{
int32_t tv_sec; /* Seconds. */
int32_t tv_usec; /* Microseconds. */
};
/* Conversion functions for converting to/from __timeval32 */
static inline struct __timeval64
valid_timeval32_to_timeval64 (const struct __timeval32 tv)
{
return (struct __timeval64) { tv.tv_sec, tv.tv_usec };
}
static inline struct __timeval32
valid_timeval64_to_timeval32 (const struct __timeval64 tv64)
{
return (struct __timeval32) { tv64.tv_sec, tv64.tv_usec };
}
static inline struct timeval
valid_timeval32_to_timeval (const struct __timeval32 tv)
{
return (struct timeval) { tv.tv_sec, tv.tv_usec };
}
static inline struct __timeval32
valid_timeval_to_timeval32 (const struct timeval tv)
{
return (struct __timeval32) { tv.tv_sec, tv.tv_usec };
}
static inline struct timespec
valid_timeval32_to_timespec (const struct __timeval32 tv)
{
return (struct timespec) { tv.tv_sec, tv.tv_usec * 1000 };
}
static inline struct __timeval32
valid_timespec_to_timeval32 (const struct timespec ts)
{
return (struct __timeval32) { (time_t) ts.tv_sec, ts.tv_nsec / 1000 };
}
static inline struct __timeval64
valid_timespec_to_timeval64 (const struct timespec ts)
{
return (struct __timeval64) { (time_t) ts.tv_sec, ts.tv_nsec / 1000 };
}
/* Check if a value is in the valid nanoseconds range. Return true if
it is, false otherwise. */
static inline bool
valid_nanoseconds (__syscall_slong_t ns)
{
return __glibc_likely (0 <= ns && ns < 1000000000);
}
/* Helper function to get time in seconds, similar to time. */
static inline time_t
time_now (void)
{
struct timespec ts;
__clock_gettime (TIME_CLOCK_GETTIME_CLOCKID, &ts);
return ts.tv_sec;
}
static inline __time64_t
time64_now (void)
{
struct __timespec64 ts;
__clock_gettime64 (TIME_CLOCK_GETTIME_CLOCKID, &ts);
return ts.tv_sec;
}
#define NSEC_PER_SEC 1000000000L /* Nanoseconds per second. */
#define USEC_PER_SEC 1000000L /* Microseconds per second. */
#define NSEC_PER_USEC 1000L /* Nanoseconds per microsecond. */
#endif
#endif
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