usr/src/uts/common/sys/time.h

   1 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
   2 /*        All Rights Reserved   */
   3
   4
   5 /*
   6  * Copyright (c) 1982, 1986, 1993 Regents of the University of California.
   7  * All rights reserved.  The Berkeley software License Agreement
   8  * specifies the terms and conditions for redistribution.
   9  */
  10
  11 /*
  12  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  13  * Use is subject to license terms.
  14  */
  15
  16 #ifndef _SYS_TIME_H
  17 #define _SYS_TIME_H
  18
  19 #include <sys/feature_tests.h>
  20
  21 /*
  22  * Structure returned by gettimeofday(2) system call,
  23  * and used in other calls.
  24  */
  25
  26 #ifdef  __cplusplus
  27 extern "C" {
  28 #endif
  29
  30 #if !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2) || \
  31         defined(__EXTENSIONS__)
  32 #ifndef _ASM
  33
  34 #if !defined(_TIME_T) || __cplusplus >= 199711L
  35 #define _TIME_T
  36 typedef long    time_t;         /* time of day in seconds */
  37 #endif  /* _TIME_T */
  38
  39 #ifndef _SUSECONDS_T
  40 #define _SUSECONDS_T
  41 typedef long    suseconds_t;    /* signed # of microseconds */
  42 #endif  /* _SUSECONDS_T */
  43
  44 struct timeval {
  45         time_t          tv_sec;         /* seconds */
  46         suseconds_t     tv_usec;        /* and microseconds */
  47 };
  48
  49 #if defined(_SYSCALL32)
  50
  51 #include <sys/types32.h>
  52
  53 #define TIMEVAL32_TO_TIMEVAL(tv, tv32)  {       \
  54         (tv)->tv_sec = (time_t)(tv32)->tv_sec;  \
  55         (tv)->tv_usec = (tv32)->tv_usec;        \
  56 }
  57
  58 #define TIMEVAL_TO_TIMEVAL32(tv32, tv)  {               \
  59         (tv32)->tv_sec = (time32_t)(tv)->tv_sec;        \
  60         (tv32)->tv_usec = (tv)->tv_usec;                \
  61 }
  62
  63 #define TIME32_MAX      INT32_MAX
  64 #define TIME32_MIN      INT32_MIN
  65
  66 #define TIMEVAL_OVERFLOW(tv)    \
  67         ((tv)->tv_sec < TIME32_MIN || (tv)->tv_sec > TIME32_MAX)
  68
  69 #endif  /* _SYSCALL32 || _KERNEL */
  70
  71 #endif  /* _ASM */
  72 #endif  /* !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2) ... */
  73
  74 #if !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__)
  75 #ifndef _ASM
  76 struct timezone {
  77         int     tz_minuteswest; /* minutes west of Greenwich */
  78         int     tz_dsttime;     /* type of dst correction */
  79 };
  80
  81 #endif  /* _ASM */
  82 #endif /* !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__) */
  83
  84 #ifdef  __cplusplus
  85 }
  86 #endif
  87
  88 /*
  89  * Needed for longlong_t type.  Placement of this due to <sys/types.h>
  90  * including <sys/select.h> which relies on the presense of the itimerval
  91  * structure.
  92  */
  93 #ifndef _ASM
  94 #include <sys/types.h>
  95 #endif  /* _ASM */
  96
  97 #ifdef  __cplusplus
  98 extern "C" {
  99 #endif
 100
 101 #if !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__)
 102
 103 #define DST_NONE        0       /* not on dst */
 104 #define DST_USA         1       /* USA style dst */
 105 #define DST_AUST        2       /* Australian style dst */
 106 #define DST_WET         3       /* Western European dst */
 107 #define DST_MET         4       /* Middle European dst */
 108 #define DST_EET         5       /* Eastern European dst */
 109 #define DST_CAN         6       /* Canada */
 110 #define DST_GB          7       /* Great Britain and Eire */
 111 #define DST_RUM         8       /* Rumania */
 112 #define DST_TUR         9       /* Turkey */
 113 #define DST_AUSTALT     10      /* Australian style with shift in 1986 */
 114
 115 /*
 116  * Operations on timevals.
 117  */
 118 #define timerisset(tvp)         ((tvp)->tv_sec || (tvp)->tv_usec)
 119 #define timercmp(tvp, uvp, cmp) \
 120         (((tvp)->tv_sec == (uvp)->tv_sec) ? \
 121             /* CSTYLED */ \
 122             ((tvp)->tv_usec cmp (uvp)->tv_usec) : \
 123             /* CSTYLED */ \
 124             ((tvp)->tv_sec cmp (uvp)->tv_sec))
 125
 126 #define timerclear(tvp)         (tvp)->tv_sec = (tvp)->tv_usec = 0
 127
 128 #ifdef __lint
 129 /*
 130  * Make innocuous, lint-happy versions until do {} while (0) is acknowleged as
 131  * lint-safe.  If the compiler could know that we always make tv_usec < 1000000
 132  * we wouldn't need a special linted version.
 133  */
 134 #define timeradd(tvp, uvp, vvp)                                 \
 135         do                                                              \
 136         {                                                               \
 137                 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec;          \
 138                 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec;       \
 139                 if ((vvp)->tv_usec >= 1000000)                          \
 140                 {                                                       \
 141                         (vvp)->tv_sec++;                                \
 142                         (vvp)->tv_usec -= 1000000;                      \
 143                 }                                                       \
 144         } while ((vvp)->tv_usec >= 1000000)
 145 #define timersub(tvp, uvp, vvp)                                 \
 146         do                                                              \
 147         {                                                               \
 148                 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec;          \
 149                 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec;       \
 150                 if ((vvp)->tv_usec < 0)                                 \
 151                 {                                                       \
 152                         (vvp)->tv_sec--;                                \
 153                         (vvp)->tv_usec += 1000000;                      \
 154                 }                                                       \
 155         } while ((vvp)->tv_usec >= 1000000)
 156 #else
 157 #define timeradd(tvp, uvp, vvp)                                 \
 158         do                                                              \
 159         {                                                               \
 160                 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec;          \
 161                 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec;       \
 162                 if ((vvp)->tv_usec >= 1000000)                          \
 163                 {                                                       \
 164                         (vvp)->tv_sec++;                                \
 165                         (vvp)->tv_usec -= 1000000;                      \
 166                 }                                                       \
 167         } while (0)
 168
 169 #define timersub(tvp, uvp, vvp)                                 \
 170         do                                                              \
 171         {                                                               \
 172                 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec;          \
 173                 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec;       \
 174                 if ((vvp)->tv_usec < 0)                                 \
 175                 {                                                       \
 176                         (vvp)->tv_sec--;                                \
 177                         (vvp)->tv_usec += 1000000;                      \
 178                 }                                                       \
 179         } while (0)
 180 #endif /* __lint */
 181
 182 #endif /* !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__) */
 183
 184 #if !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2) || defined(__EXTENSIONS__)
 185 /*
 186  * Names of the interval timers, and structure
 187  * defining a timer setting.
 188  */
 189 #define ITIMER_REAL     0       /* Decrements in real time */
 190 #define ITIMER_VIRTUAL  1       /* Decrements in process virtual time */
 191 #define ITIMER_PROF     2       /* Decrements both in process virtual */
 192                                 /* time and when system is running on */
 193                                 /* behalf of the process. */
 194 #define ITIMER_REALPROF 3       /* Decrements in real time for real- */
 195                                 /* time profiling of multithreaded */
 196                                 /* programs. */
 197
 198 #ifndef _ASM
 199 struct  itimerval {
 200         struct  timeval it_interval;    /* timer interval */
 201         struct  timeval it_value;       /* current value */
 202 };
 203
 204 #if defined(_SYSCALL32)
 205
 206 struct itimerval32 {
 207         struct  timeval32 it_interval;
 208         struct  timeval32 it_value;
 209 };
 210
 211 #define ITIMERVAL32_TO_ITIMERVAL(itv, itv32)    {       \
 212         TIMEVAL32_TO_TIMEVAL(&(itv)->it_interval, &(itv32)->it_interval); \
 213         TIMEVAL32_TO_TIMEVAL(&(itv)->it_value, &(itv32)->it_value);     \
 214 }
 215
 216 #define ITIMERVAL_TO_ITIMERVAL32(itv32, itv)    {       \
 217         TIMEVAL_TO_TIMEVAL32(&(itv32)->it_interval, &(itv)->it_interval); \
 218         TIMEVAL_TO_TIMEVAL32(&(itv32)->it_value, &(itv)->it_value);     \
 219 }
 220
 221 #define ITIMERVAL_OVERFLOW(itv)                         \
 222         (TIMEVAL_OVERFLOW(&(itv)->it_interval) ||       \
 223         TIMEVAL_OVERFLOW(&(itv)->it_value))
 224
 225 #endif  /* _SYSCALL32 */
 226 #endif  /* _ASM */
 227 #endif /* !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2) ... */
 228
 229
 230 #if !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__)
 231 /*
 232  *      Definitions for commonly used resolutions.
 233  */
 234 #define SEC             1
 235 #define MILLISEC        1000
 236 #define MICROSEC        1000000
 237 #define NANOSEC         1000000000
 238
 239 #endif /* !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__) */
 240
 241 #ifndef _ASM
 242
 243 /*
 244  * Time expressed as a 64-bit nanosecond counter.
 245  */
 246 typedef longlong_t      hrtime_t;
 247
 248 #ifdef _KERNEL
 249
 250 #include <sys/time_impl.h>
 251 #include <sys/mutex.h>
 252
 253 extern int tick_per_msec;       /* clock ticks per millisecond (may be zero) */
 254 extern int msec_per_tick;       /* milliseconds per clock tick (may be zero) */
 255 extern int usec_per_tick;       /* microseconds per clock tick */
 256 extern int nsec_per_tick;       /* nanoseconds per clock tick */
 257
 258 /*
 259  * Macros to convert from common units of time (sec, msec, usec, nsec,
 260  * timeval, timestruc) to clock ticks and vice versa.
 261  */
 262 #define TICK_TO_SEC(tick)       ((tick) / hz)
 263 #define SEC_TO_TICK(sec)        ((sec) * hz)
 264
 265 #define TICK_TO_MSEC(tick)      \
 266         (msec_per_tick ? (tick) * msec_per_tick : (tick) / tick_per_msec)
 267 #define MSEC_TO_TICK(msec)      \
 268         (msec_per_tick ? (msec) / msec_per_tick : (msec) * tick_per_msec)
 269 #define MSEC_TO_TICK_ROUNDUP(msec)      \
 270         (msec_per_tick ? \
 271         ((msec) == 0 ? 0 : ((msec) - 1) / msec_per_tick + 1) : \
 272         (msec) * tick_per_msec)
 273
 274 #define TICK_TO_USEC(tick)              ((tick) * usec_per_tick)
 275 #define USEC_TO_TICK(usec)              ((usec) / usec_per_tick)
 276 #define USEC_TO_TICK_ROUNDUP(usec)      \
 277         ((usec) == 0 ? 0 : USEC_TO_TICK((usec) - 1) + 1)
 278
 279 #define TICK_TO_NSEC(tick)              ((hrtime_t)(tick) * nsec_per_tick)
 280 #define NSEC_TO_TICK(nsec)              ((nsec) / nsec_per_tick)
 281 #define NSEC_TO_TICK_ROUNDUP(nsec)      \
 282         ((nsec) == 0 ? 0 : NSEC_TO_TICK((nsec) - 1) + 1)
 283
 284 #define TICK_TO_TIMEVAL(tick, tvp) {    \
 285         clock_t __tmptck = (tick);      \
 286         (tvp)->tv_sec = TICK_TO_SEC(__tmptck);  \
 287         (tvp)->tv_usec = TICK_TO_USEC(__tmptck - SEC_TO_TICK((tvp)->tv_sec)); \
 288 }
 289
 290 #define TICK_TO_TIMEVAL32(tick, tvp) {  \
 291         clock_t __tmptck = (tick);      \
 292         time_t __tmptm = TICK_TO_SEC(__tmptck); \
 293         (tvp)->tv_sec = (time32_t)__tmptm;      \
 294         (tvp)->tv_usec = TICK_TO_USEC(__tmptck - SEC_TO_TICK(__tmptm)); \
 295 }
 296
 297 #define TICK_TO_TIMESTRUC(tick, tsp) {  \
 298         clock_t __tmptck = (tick);      \
 299         (tsp)->tv_sec = TICK_TO_SEC(__tmptck);  \
 300         (tsp)->tv_nsec = TICK_TO_NSEC(__tmptck - SEC_TO_TICK((tsp)->tv_sec)); \
 301 }
 302
 303 #define TICK_TO_TIMESTRUC32(tick, tsp) {        \
 304         clock_t __tmptck = (tick);                      \
 305         time_t __tmptm = TICK_TO_SEC(__tmptck);         \
 306         (tsp)->tv_sec = (time32_t)__tmptm;              \
 307         (tsp)->tv_nsec = TICK_TO_NSEC(__tmptck - SEC_TO_TICK(__tmptm)); \
 308 }
 309
 310 #define TIMEVAL_TO_TICK(tvp)    \
 311         (SEC_TO_TICK((tvp)->tv_sec) + USEC_TO_TICK((tvp)->tv_usec))
 312
 313 #define TIMESTRUC_TO_TICK(tsp)  \
 314         (SEC_TO_TICK((tsp)->tv_sec) + NSEC_TO_TICK((tsp)->tv_nsec))
 315
 316 typedef struct todinfo {
 317         int     tod_sec;        /* seconds 0-59 */
 318         int     tod_min;        /* minutes 0-59 */
 319         int     tod_hour;       /* hours 0-23 */
 320         int     tod_dow;        /* day of week 1-7 */
 321         int     tod_day;        /* day of month 1-31 */
 322         int     tod_month;      /* month 1-12 */
 323         int     tod_year;       /* year 70+ */
 324 } todinfo_t;
 325
 326 extern  int64_t         timedelta;
 327 extern  int             timechanged;
 328 extern  int             tod_needsync;
 329 extern  kmutex_t        tod_lock;
 330 extern  volatile timestruc_t    hrestime;
 331 extern  hrtime_t        hres_last_tick;
 332 extern  int64_t         hrestime_adj;
 333 extern  uint_t          adj_shift;
 334
 335 extern  timestruc_t     tod_get(void);
 336 extern  void            tod_set(timestruc_t);
 337 extern  void            set_hrestime(timestruc_t *);
 338 extern  todinfo_t       utc_to_tod(time_t);
 339 extern  time_t          tod_to_utc(todinfo_t);
 340 extern  int             hr_clock_lock(void);
 341 extern  void            hr_clock_unlock(int);
 342 extern  hrtime_t        gethrtime(void);
 343 extern  hrtime_t        gethrtime_unscaled(void);
 344 extern  hrtime_t        gethrtime_max(void);
 345 extern  hrtime_t        gethrtime_waitfree(void);
 346 extern  void            scalehrtime(hrtime_t *);
 347 extern  void            gethrestime(timespec_t *);
 348 extern  time_t          gethrestime_sec(void);
 349 extern  void            gethrestime_lasttick(timespec_t *);
 350 extern  void            hrt2ts(hrtime_t, timestruc_t *);
 351 extern  hrtime_t        ts2hrt(const timestruc_t *);
 352 extern  void            hrt2tv(hrtime_t, struct timeval *);
 353 extern  hrtime_t        tv2hrt(struct timeval *);
 354 extern  int             itimerfix(struct timeval *, int);
 355 extern  int             itimerdecr(struct itimerval *, int);
 356 extern  void            timevaladd(struct timeval *, struct timeval *);
 357 extern  void            timevalsub(struct timeval *, struct timeval *);
 358 extern  void            timevalfix(struct timeval *);
 359 extern  void            dtrace_hres_tick(void);
 360
 361 #if defined(_SYSCALL32)
 362 extern  void            hrt2ts32(hrtime_t, timestruc32_t *);
 363 #endif
 364
 365 #endif /* _KERNEL */
 366
 367 #if !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__)
 368 #if defined(__STDC__)
 369 int adjtime(struct timeval *, struct timeval *);
 370 #else
 371 int adjtime();
 372 #endif
 373 #endif /* !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) ... */
 374
 375 #if !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) || \
 376         defined(_ATFILE_SOURCE) || defined(__EXTENSIONS__)
 377 #if defined(__STDC__)
 378 int futimesat(int, const char *, const struct timeval *);
 379 #else
 380 int futimesat();
 381 #endif /* defined(__STDC__) */
 382 #endif /* defined(__ATFILE_SOURCE) */
 383
 384 #if !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2) || \
 385         defined(__EXTENSIONS__)
 386
 387 #if defined(__STDC__)
 388
 389 int getitimer(int, struct itimerval *);
 390 int utimes(const char *, const struct timeval *);
 391 #if defined(_XPG4_2)
 392 int setitimer(int, const struct itimerval *_RESTRICT_KYWD,
 393         struct itimerval *_RESTRICT_KYWD);
 394 #else
 395 int setitimer(int, struct itimerval *_RESTRICT_KYWD,
 396         struct itimerval *_RESTRICT_KYWD);
 397 #endif /* defined(_XPG2_2) */
 398
 399 #else /* __STDC__ */
 400
 401 int gettimer();
 402 int settimer();
 403 int utimes();
 404 #endif /* __STDC__ */
 405 #endif /* !defined(_KERNEL) ... defined(_XPG4_2) */
 406
 407 /*
 408  * gettimeofday() and settimeofday() were included in SVr4 due to their
 409  * common use in BSD based applications.  They were to be included exactly
 410  * as in BSD, with two parameters.  However, AT&T/USL noted that the second
 411  * parameter was unused and deleted it, thereby making a routine included
 412  * for compatibility, incompatible.
 413  *
 414  * XSH4.2 (spec 1170) defines gettimeofday and settimeofday to have two
 415  * parameters.
 416  *
 417  * This has caused general disagreement in the application community as to
 418  * the syntax of these routines.  Solaris defaults to the XSH4.2 definition.
 419  * The flag _SVID_GETTOD may be used to force the SVID version.
 420  */
 421 #if !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__)
 422
 423 #if defined(__STDC__)
 424 #if defined(_SVID_GETTOD)
 425 int settimeofday(struct timeval *);
 426 #else
 427 int settimeofday(struct timeval *, void *);
 428 #endif
 429 hrtime_t        gethrtime(void);
 430 hrtime_t        gethrvtime(void);
 431 #else /* __STDC__ */
 432 int settimeofday();
 433 hrtime_t        gethrtime();
 434 hrtime_t        gethrvtime();
 435 #endif /* __STDC__ */
 436
 437 #endif /* !(defined _KERNEL) && !defined(__XOPEN_OR_POSIX) ... */
 438
 439 #if !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2) || \
 440         defined(__EXTENSIONS__)
 441
 442 #if defined(__STDC__)
 443 #if defined(_SVID_GETTOD)
 444 int gettimeofday(struct timeval *);
 445 #else
 446 int gettimeofday(struct timeval *_RESTRICT_KYWD, void *_RESTRICT_KYWD);
 447 #endif
 448 #else /* __STDC__ */
 449 int gettimeofday();
 450 #endif /* __STDC__ */
 451
 452 #endif /* !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) ... */
 453
 454 /*
 455  * The inclusion of <time.h> is historical and was added for
 456  * backward compatibility in delta 1.2 when a number of definitions
 457  * were moved out of <sys/time.h>.  More recently, the timespec and
 458  * itimerspec structure definitions, along with the _CLOCK_*, CLOCK_*,
 459  * _TIMER_*, and TIMER_* symbols were moved to <sys/time_impl.h>,
 460  * which is now included by <time.h>.  This change was due to POSIX
 461  * 1003.1b-1993 and X/Open UNIX 98 requirements.  For non-POSIX and
 462  * non-X/Open applications, including this header will still make
 463  * visible these definitions.
 464  */
 465 #if !defined(_BOOT) && !defined(_KERNEL) && \
 466         !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__)
 467 #include <time.h>
 468 #endif
 469
 470 /*
 471  * The inclusion of <sys/select.h> is needed for the FD_CLR,
 472  * FD_ISSET, FD_SET, and FD_SETSIZE macros as well as the
 473  * select() prototype defined in the XOpen specifications
 474  * beginning with XSH4v2.  Placement required after definition
 475  * for itimerval.
 476  */
 477 #if !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2) || \
 478         defined(__EXTENSIONS__)
 479 #include <sys/select.h>
 480 #endif
 481
 482 #endif  /* _ASM */
 483
 484 #ifdef  __cplusplus
 485 }
 486 #endif
 487
 488 #endif  /* _SYS_TIME_H */