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 2009 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 uint64_t unscalehrtime(hrtime_t); 348 extern void gethrestime(timespec_t *); 349 extern time_t gethrestime_sec(void); 350 extern void gethrestime_lasttick(timespec_t *); 351 extern void hrt2ts(hrtime_t, timestruc_t *); 352 extern hrtime_t ts2hrt(const timestruc_t *); 353 extern void hrt2tv(hrtime_t, struct timeval *); 354 extern hrtime_t tv2hrt(struct timeval *); 355 extern int itimerfix(struct timeval *, int); 356 extern int itimerdecr(struct itimerval *, int); 357 extern void timevaladd(struct timeval *, struct timeval *); 358 extern void timevalsub(struct timeval *, struct timeval *); 359 extern void timevalfix(struct timeval *); 360 extern void dtrace_hres_tick(void); 361 362 #if defined(_SYSCALL32) 363 extern void hrt2ts32(hrtime_t, timestruc32_t *); 364 #endif 365 366 #endif /* _KERNEL */ 367 368 #if !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__) 369 #if defined(__STDC__) 370 int adjtime(struct timeval *, struct timeval *); 371 #else 372 int adjtime(); 373 #endif 374 #endif /* !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) ... */ 375 376 #if !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) || \ 377 defined(_ATFILE_SOURCE) || defined(__EXTENSIONS__) 378 #if defined(__STDC__) 379 int futimesat(int, const char *, const struct timeval *); 380 #else 381 int futimesat(); 382 #endif /* defined(__STDC__) */ 383 #endif /* defined(__ATFILE_SOURCE) */ 384 385 #if !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2) || \ 386 defined(__EXTENSIONS__) 387 388 #if defined(__STDC__) 389 390 int getitimer(int, struct itimerval *); 391 int utimes(const char *, const struct timeval *); 392 #if defined(_XPG4_2) 393 int setitimer(int, const struct itimerval *_RESTRICT_KYWD, 394 struct itimerval *_RESTRICT_KYWD); 395 #else 396 int setitimer(int, struct itimerval *_RESTRICT_KYWD, 397 struct itimerval *_RESTRICT_KYWD); 398 #endif /* defined(_XPG2_2) */ 399 400 #else /* __STDC__ */ 401 402 int gettimer(); 403 int settimer(); 404 int utimes(); 405 #endif /* __STDC__ */ 406 #endif /* !defined(_KERNEL) ... defined(_XPG4_2) */ 407 408 /* 409 * gettimeofday() and settimeofday() were included in SVr4 due to their 410 * common use in BSD based applications. They were to be included exactly 411 * as in BSD, with two parameters. However, AT&T/USL noted that the second 412 * parameter was unused and deleted it, thereby making a routine included 413 * for compatibility, incompatible. 414 * 415 * XSH4.2 (spec 1170) defines gettimeofday and settimeofday to have two 416 * parameters. 417 * 418 * This has caused general disagreement in the application community as to 419 * the syntax of these routines. Solaris defaults to the XSH4.2 definition. 420 * The flag _SVID_GETTOD may be used to force the SVID version. 421 */ 422 #if !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__) 423 424 #if defined(__STDC__) 425 #if defined(_SVID_GETTOD) 426 int settimeofday(struct timeval *); 427 #else 428 int settimeofday(struct timeval *, void *); 429 #endif 430 hrtime_t gethrtime(void); 431 hrtime_t gethrvtime(void); 432 #else /* __STDC__ */ 433 int settimeofday(); 434 hrtime_t gethrtime(); 435 hrtime_t gethrvtime(); 436 #endif /* __STDC__ */ 437 438 #endif /* !(defined _KERNEL) && !defined(__XOPEN_OR_POSIX) ... */ 439 440 #if !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2) || \ 441 defined(__EXTENSIONS__) 442 443 #if defined(__STDC__) 444 #if defined(_SVID_GETTOD) 445 int gettimeofday(struct timeval *); 446 #else 447 int gettimeofday(struct timeval *_RESTRICT_KYWD, void *_RESTRICT_KYWD); 448 #endif 449 #else /* __STDC__ */ 450 int gettimeofday(); 451 #endif /* __STDC__ */ 452 453 #endif /* !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) ... */ 454 455 /* 456 * The inclusion of <time.h> is historical and was added for 457 * backward compatibility in delta 1.2 when a number of definitions 458 * were moved out of <sys/time.h>. More recently, the timespec and 459 * itimerspec structure definitions, along with the _CLOCK_*, CLOCK_*, 460 * _TIMER_*, and TIMER_* symbols were moved to <sys/time_impl.h>, 461 * which is now included by <time.h>. This change was due to POSIX 462 * 1003.1b-1993 and X/Open UNIX 98 requirements. For non-POSIX and 463 * non-X/Open applications, including this header will still make 464 * visible these definitions. 465 */ 466 #if !defined(_BOOT) && !defined(_KERNEL) && \ 467 !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__) 468 #include <time.h> 469 #endif 470 471 /* 472 * The inclusion of <sys/select.h> is needed for the FD_CLR, 473 * FD_ISSET, FD_SET, and FD_SETSIZE macros as well as the 474 * select() prototype defined in the XOpen specifications 475 * beginning with XSH4v2. Placement required after definition 476 * for itimerval. 477 */ 478 #if !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2) || \ 479 defined(__EXTENSIONS__) 480 #include <sys/select.h> 481 #endif 482 483 #endif /* _ASM */ 484 485 #ifdef __cplusplus 486 } 487 #endif 488 489 #endif /* _SYS_TIME_H */ 490