include/time.h

   1 #ifndef _TIME_H
   2 #include <time/time.h>
   3
   4 #ifndef _ISOMAC
   5 # include <bits/types/struct_timeval.h>
   6 # include <bits/types/locale_t.h>
   7 # include <stdbool.h>
   8 # include <time/mktime-internal.h>
   9 # include <endian.h>
  10 # include <time-clockid.h>
  11 # include <sys/time.h>
  12
  13 extern __typeof (strftime_l) __strftime_l;
  14 libc_hidden_proto (__strftime_l)
  15 extern __typeof (strptime_l) __strptime_l;
  16
  17 libc_hidden_proto (asctime)
  18 libc_hidden_proto (mktime)
  19 libc_hidden_proto (timelocal)
  20 libc_hidden_proto (localtime)
  21 libc_hidden_proto (strftime)
  22 libc_hidden_proto (strptime)
  23
  24 extern __typeof (clock_gettime) __clock_gettime;
  25 libc_hidden_proto (__clock_gettime)
  26 extern __typeof (clock_settime) __clock_settime;
  27 libc_hidden_proto (__clock_settime)
  28
  29 extern __typeof (clock_nanosleep) __clock_nanosleep;
  30 libc_hidden_proto (__clock_nanosleep);
  31
  32 #ifdef __linux__
  33 extern __typeof (clock_adjtime) __clock_adjtime;
  34 libc_hidden_proto (__clock_adjtime);
  35 #endif
  36
  37 /* Now define the internal interfaces.  */
  38 struct tm;
  39
  40 /* Defined in mktime.c.  */
  41 extern const unsigned short int __mon_yday[2][13] attribute_hidden;
  42
  43 /* Defined in localtime.c.  */
  44 extern struct tm _tmbuf attribute_hidden;
  45
  46 /* Defined in tzset.c.  */
  47 extern char *__tzstring (const char *string) attribute_hidden;
  48
  49 extern int __use_tzfile attribute_hidden;
  50
  51 extern void __tzfile_read (const char *file, size_t extra,
  52                            char **extrap) attribute_hidden;
  53 extern void __tzfile_compute (__time64_t timer, int use_localtime,
  54                               long int *leap_correct, int *leap_hit,
  55                               struct tm *tp) attribute_hidden;
  56 extern void __tzfile_default (const char *std, const char *dst,
  57                               int stdoff, int dstoff)
  58   attribute_hidden;
  59 extern void __tzset_parse_tz (const char *tz) attribute_hidden;
  60 extern void __tz_compute (__time64_t timer, struct tm *tm, int use_localtime)
  61   __THROW attribute_hidden;
  62
  63 #if __TIMESIZE == 64
  64 # define __timespec64 timespec
  65 #else
  66 /* The glibc Y2038-proof struct __timespec64 structure for a time value.
  67    To keep things Posix-ish, we keep the nanoseconds field a 32-bit
  68    signed long, but since the Linux field is a 64-bit signed int, we
  69    pad our tv_nsec with a 32-bit unnamed bit-field padding.
  70
  71    As a general rule the Linux kernel is ignoring upper 32 bits of
  72    tv_nsec field.  */
  73 struct __timespec64
  74 {
  75   __time64_t tv_sec;         /* Seconds */
  76 # if BYTE_ORDER == BIG_ENDIAN
  77   __int32_t :32;             /* Padding */
  78   __int32_t tv_nsec;         /* Nanoseconds */
  79 # else
  80   __int32_t tv_nsec;         /* Nanoseconds */
  81   __int32_t :32;             /* Padding */
  82 # endif
  83 };
  84 #endif
  85
  86 #if __TIMESIZE == 64
  87 # define __itimerspec64 itimerspec
  88 #else
  89 /* The glibc's internal representation of the struct itimerspec.  */
  90 struct __itimerspec64
  91 {
  92   struct __timespec64 it_interval;
  93   struct __timespec64 it_value;
  94 };
  95 #endif
  96
  97 #if __TIMESIZE == 64
  98 # define __timeval64 timeval
  99 #else
 100 /* The glibc Y2038-proof struct __timeval64 structure for a time value.
 101    This structure is NOT supposed to be passed to the Linux kernel.
 102    Instead, it shall be converted to struct __timespec64 and time shall
 103    be [sg]et via clock_[sg]ettime (which are now Y2038 safe).  */
 104 struct __timeval64
 105 {
 106   __time64_t tv_sec;         /* Seconds */
 107   __suseconds64_t tv_usec;       /* Microseconds */
 108 };
 109 #endif
 110
 111 #if __TIMESIZE == 64
 112 # define __utimbuf64 utimbuf
 113 #else
 114 /* The glibc Y2038-proof struct __utimbuf64 structure for file's access
 115    and modification time values.  */
 116 struct __utimbuf64
 117 {
 118   __time64_t actime;            /* Access time.  */
 119   __time64_t modtime;           /* Modification time.  */
 120 };
 121 #endif
 122
 123 #if __TIMESIZE == 64
 124 # define __ctime64 ctime
 125 #else
 126 extern char *__ctime64 (const __time64_t *__timer) __THROW;
 127 libc_hidden_proto (__ctime64)
 128 #endif
 129
 130 #if __TIMESIZE == 64
 131 # define __ctime64_r ctime_r
 132 #else
 133 extern char *__ctime64_r (const __time64_t *__restrict __timer,
 134                           char *__restrict __buf) __THROW;
 135 libc_hidden_proto (__ctime64_r)
 136 #endif
 137
 138 #if __TIMESIZE == 64
 139 # define __localtime64 localtime
 140 #else
 141 extern struct tm *__localtime64 (const __time64_t *__timer);
 142 libc_hidden_proto (__localtime64)
 143 #endif
 144
 145 extern struct tm *__localtime_r (const time_t *__timer,
 146                                  struct tm *__tp) attribute_hidden;
 147 #if __TIMESIZE != 64
 148 extern struct tm *__localtime64_r (const __time64_t *__timer,
 149                                    struct tm *__tp);
 150 libc_hidden_proto (__localtime64_r)
 151
 152 extern __time64_t __mktime64 (struct tm *__tp) __THROW;
 153 libc_hidden_proto (__mktime64)
 154 #endif
 155
 156 extern struct tm *__gmtime_r (const time_t *__restrict __timer,
 157                               struct tm *__restrict __tp);
 158 libc_hidden_proto (__gmtime_r)
 159
 160 #if __TIMESIZE == 64
 161 # define __gmtime64 gmtime
 162 #else
 163 extern struct tm *__gmtime64 (const __time64_t *__timer);
 164 libc_hidden_proto (__gmtime64)
 165
 166 extern struct tm *__gmtime64_r (const __time64_t *__restrict __timer,
 167                                 struct tm *__restrict __tp);
 168 libc_hidden_proto (__gmtime64_r)
 169
 170 extern __time64_t __timegm64 (struct tm *__tp) __THROW;
 171 libc_hidden_proto (__timegm64)
 172 #endif
 173
 174 #if __TIMESIZE == 64
 175 # define __clock_settime64 __clock_settime
 176 #else
 177 extern int __clock_settime64 (clockid_t clock_id,
 178                               const struct __timespec64 *tp);
 179 libc_hidden_proto (__clock_settime64)
 180 #endif
 181
 182 #if __TIMESIZE == 64
 183 # define __clock_getres64 __clock_getres
 184 #else
 185 extern int __clock_getres64 (clockid_t clock_id,
 186                              struct __timespec64 *tp);
 187 libc_hidden_proto (__clock_getres64);
 188 #endif
 189
 190 #if __TIMESIZE == 64
 191 # define __utime64 __utime
 192 # define __utimes64 __utimes
 193 # define __utimensat64 __utimensat
 194 #else
 195 extern int __utime64 (const char *file, const struct __utimbuf64 *times);
 196 libc_hidden_proto (__utime64)
 197 extern int __utimes64 (const char *file, const struct __timeval64 tvp[2]);
 198 libc_hidden_proto (__utimes64)
 199 extern int __utimensat64 (int fd, const char *file,
 200                           const struct __timespec64 tsp[2], int flags);
 201 libc_hidden_proto (__utimensat64);
 202 #endif
 203
 204 extern int __utimensat64_helper (int fd, const char *file,
 205                                  const struct __timespec64 tsp[2], int flags);
 206 libc_hidden_proto (__utimensat64_helper);
 207
 208 #if __TIMESIZE == 64
 209 # define __futimes64 __futimes
 210 # define __futimesat64 __futimesat
 211 # define __lutimes64 __lutimes
 212 # define __futimens64 __futimens
 213 #else
 214 extern int __futimes64 (int fd, const struct __timeval64 tvp64[2]);
 215 libc_hidden_proto (__futimes64);
 216 extern int __futimesat64 (int fd, const char *file,
 217                           const struct __timeval64 tvp[2]);
 218 libc_hidden_proto (__futimesat64);
 219 extern int __lutimes64 (const char *file, const struct __timeval64 tvp64[2]);
 220 libc_hidden_proto (__lutimes64);
 221 extern int __futimens64 (int fd, const struct __timespec64 tsp[2]);
 222 libc_hidden_proto (__futimens64);
 223 #endif
 224
 225 #if __TIMESIZE == 64
 226 # define __timer_gettime64 __timer_gettime
 227 # define __timerfd_gettime64 __timerfd_gettime
 228 #else
 229 extern int __timer_gettime64 (timer_t timerid, struct __itimerspec64 *value);
 230 extern int __timerfd_gettime64 (int fd, struct __itimerspec64 *value);
 231 librt_hidden_proto (__timer_gettime64);
 232 libc_hidden_proto (__timerfd_gettime64);
 233 #endif
 234
 235 #if __TIMESIZE == 64
 236 # define __timer_settime64 __timer_settime
 237 # define __timerfd_settime64 __timerfd_settime
 238 #else
 239 extern int __timer_settime64 (timer_t timerid, int flags,
 240                               const struct __itimerspec64 *value,
 241                               struct __itimerspec64 *ovalue);
 242 extern int __timerfd_settime64 (int fd, int flags,
 243                                 const struct __itimerspec64 *value,
 244                                 struct __itimerspec64 *ovalue);
 245 librt_hidden_proto (__timer_settime64);
 246 libc_hidden_proto (__timerfd_settime64);
 247 #endif
 248
 249 #if __TIMESIZE == 64
 250 # define __sched_rr_get_interval64 __sched_rr_get_interval
 251 #else
 252 extern int __sched_rr_get_interval64 (pid_t pid, struct __timespec64 *tp);
 253 libc_hidden_proto (__sched_rr_get_interval64);
 254 #endif
 255
 256 #if __TIMESIZE == 64
 257 # define __settimeofday64 __settimeofday
 258 # define __gettimeofday64 __gettimeofday
 259 #else
 260 extern int __settimeofday64 (const struct __timeval64 *tv,
 261                              const struct timezone *tz);
 262 libc_hidden_proto (__settimeofday64)
 263 extern int __gettimeofday64 (struct __timeval64 *restrict tv,
 264                              void *restrict tz);
 265 libc_hidden_proto (__gettimeofday64)
 266 #endif
 267
 268 /* Compute the `struct tm' representation of T,
 269    offset OFFSET seconds east of UTC,
 270    and store year, yday, mon, mday, wday, hour, min, sec into *TP.
 271    Return nonzero if successful.  */
 272 extern int __offtime (__time64_t __timer,
 273                       long int __offset,
 274                       struct tm *__tp) attribute_hidden;
 275
 276 extern char *__asctime_r (const struct tm *__tp, char *__buf)
 277   attribute_hidden;
 278 extern void __tzset (void) attribute_hidden;
 279
 280 /* Prototype for the internal function to get information based on TZ.  */
 281 extern struct tm *__tz_convert (__time64_t timer, int use_localtime,
 282                                 struct tm *tp) attribute_hidden;
 283
 284 extern int __nanosleep (const struct timespec *__requested_time,
 285                         struct timespec *__remaining);
 286 hidden_proto (__nanosleep)
 287 extern int __getdate_r (const char *__string, struct tm *__resbufp)
 288   attribute_hidden;
 289
 290
 291 /* Determine CLK_TCK value.  */
 292 extern int __getclktck (void) attribute_hidden;
 293
 294
 295 /* strptime support.  */
 296 extern char * __strptime_internal (const char *rp, const char *fmt,
 297                                    struct tm *tm, void *statep,
 298                                    locale_t locparam) attribute_hidden;
 299
 300 #if __TIMESIZE == 64
 301 # define __difftime64 __difftime
 302 #else
 303 extern double __difftime64 (__time64_t time1, __time64_t time0);
 304 libc_hidden_proto (__difftime64)
 305 #endif
 306
 307 extern double __difftime (time_t time1, time_t time0);
 308
 309 #if __TIMESIZE == 64
 310 # define __clock_nanosleep_time64 __clock_nanosleep
 311 # define __clock_gettime64 __clock_gettime
 312 # define __timespec_get64 __timespec_get
 313 #else
 314 extern int __clock_nanosleep_time64 (clockid_t clock_id,
 315                                      int flags, const struct __timespec64 *req,
 316                                      struct __timespec64 *rem);
 317 libc_hidden_proto (__clock_nanosleep_time64)
 318 extern int __clock_gettime64 (clockid_t clock_id, struct __timespec64 *tp);
 319 libc_hidden_proto (__clock_gettime64)
 320 extern int __timespec_get64 (struct __timespec64 *ts, int base);
 321 libc_hidden_proto (__timespec_get64)
 322 #endif
 323
 324 /* Use in the clock_* functions.  Size of the field representing the
 325    actual clock ID.  */
 326 #define CLOCK_IDFIELD_SIZE      3
 327
 328 /* Check whether T fits in time_t.  */
 329 static inline bool
 330 in_time_t_range (__time64_t t)
 331 {
 332   time_t s = t;
 333   return s == t;
 334 }
 335
 336 /* Convert a known valid struct timeval into a struct __timespec64.  */
 337 static inline struct __timespec64
 338 valid_timeval_to_timespec64 (const struct timeval tv)
 339 {
 340   struct __timespec64 ts64;
 341
 342   ts64.tv_sec = tv.tv_sec;
 343   ts64.tv_nsec = tv.tv_usec * 1000;
 344
 345   return ts64;
 346 }
 347
 348 /* Convert a known valid struct timeval into a struct __timeval64.  */
 349 static inline struct __timeval64
 350 valid_timeval_to_timeval64 (const struct timeval tv)
 351 {
 352   struct __timeval64 tv64;
 353
 354   tv64.tv_sec = tv.tv_sec;
 355   tv64.tv_usec = tv.tv_usec;
 356
 357   return tv64;
 358 }
 359
 360 /* Convert a valid and within range of struct timeval, struct
 361    __timeval64 into a struct timeval.  */
 362 static inline struct timeval
 363 valid_timeval64_to_timeval (const struct __timeval64 tv64)
 364 {
 365   struct timeval tv;
 366
 367   tv.tv_sec = (time_t) tv64.tv_sec;
 368   tv.tv_usec = (suseconds_t) tv64.tv_usec;
 369
 370   return tv;
 371 }
 372
 373 /* Convert a struct __timeval64 into a struct __timespec64.  */
 374 static inline struct __timespec64
 375 timeval64_to_timespec64 (const struct __timeval64 tv64)
 376 {
 377   struct __timespec64 ts64;
 378
 379   ts64.tv_sec = tv64.tv_sec;
 380   ts64.tv_nsec = tv64.tv_usec * 1000;
 381
 382   return ts64;
 383 }
 384
 385 /* Convert a known valid struct timespec into a struct __timespec64.  */
 386 static inline struct __timespec64
 387 valid_timespec_to_timespec64 (const struct timespec ts)
 388 {
 389   struct __timespec64 ts64;
 390
 391   ts64.tv_sec = ts.tv_sec;
 392   ts64.tv_nsec = ts.tv_nsec;
 393
 394   return ts64;
 395 }
 396
 397 /* Convert a valid and within range of struct timespec, struct
 398    __timespec64 into a struct timespec.  */
 399 static inline struct timespec
 400 valid_timespec64_to_timespec (const struct __timespec64 ts64)
 401 {
 402   struct timespec ts;
 403
 404   ts.tv_sec = (time_t) ts64.tv_sec;
 405   ts.tv_nsec = ts64.tv_nsec;
 406
 407   return ts;
 408 }
 409
 410 /* Convert a valid and within range of struct timeval struct
 411    __timespec64 into a struct timeval.  */
 412 static inline struct timeval
 413 valid_timespec64_to_timeval (const struct __timespec64 ts64)
 414 {
 415   struct timeval tv;
 416
 417   tv.tv_sec = (time_t) ts64.tv_sec;
 418   tv.tv_usec = ts64.tv_nsec / 1000;
 419
 420   return tv;
 421 }
 422
 423 /* Convert a struct __timespec64 into a struct __timeval64.  */
 424 static inline struct __timeval64
 425 timespec64_to_timeval64 (const struct __timespec64 ts64)
 426 {
 427   struct __timeval64 tv64;
 428
 429   tv64.tv_sec = ts64.tv_sec;
 430   tv64.tv_usec = ts64.tv_nsec / 1000;
 431
 432   return tv64;
 433 }
 434
 435 /* Check if a value is in the valid nanoseconds range. Return true if
 436    it is, false otherwise.  */
 437 static inline bool
 438 valid_nanoseconds (__syscall_slong_t ns)
 439 {
 440   return __glibc_likely (0 <= ns && ns < 1000000000);
 441 }
 442
 443 /* Helper function to get time in seconds, similar to time.  */
 444 static inline time_t
 445 time_now (void)
 446 {
 447   struct timespec ts;
 448   __clock_gettime (TIME_CLOCK_GETTIME_CLOCKID, &ts);
 449   return ts.tv_sec;
 450 }
 451 #endif
 452
 453 #endif