1 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 2 /* All Rights Reserved */ 3 4 5 /* 6 * Copyright (c) 1982, 1986 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 2007 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 #pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.16 */ 20 21 #include <sys/feature_tests.h> 22 23 /* 24 * Structure returned by gettimeofday(2) system call, 25 * and used in other calls. 26 */ 27 28 #ifdef __cplusplus 29 extern "C" { 30 #endif 31 32 #if !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2) || \ 33 defined(__EXTENSIONS__) 34 #ifndef _ASM 35 36 #if !defined(_TIME_T) || __cplusplus >= 199711L 37 #define _TIME_T 38 typedef long time_t; /* time of day in seconds */ 39 #endif /* _TIME_T */ 40 41 #ifndef _SUSECONDS_T 42 #define _SUSECONDS_T 43 typedef long suseconds_t; /* signed # of microseconds */ 44 #endif /* _SUSECONDS_T */ 45 46 struct timeval { 47 time_t tv_sec; /* seconds */ 48 suseconds_t tv_usec; /* and microseconds */ 49 }; 50 51 #if defined(_SYSCALL32) 52 53 #include <sys/types32.h> 54 55 #define TIMEVAL32_TO_TIMEVAL(tv, tv32) { \ 56 (tv)->tv_sec = (time_t)(tv32)->tv_sec; \ 57 (tv)->tv_usec = (tv32)->tv_usec; \ 58 } 59 60 #define TIMEVAL_TO_TIMEVAL32(tv32, tv) { \ 61 (tv32)->tv_sec = (time32_t)(tv)->tv_sec; \ 62 (tv32)->tv_usec = (tv)->tv_usec; \ 63 } 64 65 #define TIME32_MAX INT32_MAX 66 #define TIME32_MIN INT32_MIN 67 68 #define TIMEVAL_OVERFLOW(tv) \ 69 ((tv)->tv_sec < TIME32_MIN || (tv)->tv_sec > TIME32_MAX) 70 71 #endif /* _SYSCALL32 || _KERNEL */ 72 73 #endif /* _ASM */ 74 #endif /* !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2) ... */ 75 76 #if !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__) 77 #ifndef _ASM 78 struct timezone { 79 int tz_minuteswest; /* minutes west of Greenwich */ 80 int tz_dsttime; /* type of dst correction */ 81 }; 82 83 #endif /* _ASM */ 84 #endif /* !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__) */ 85 86 #ifdef __cplusplus 87 } 88 #endif 89 90 /* 91 * Needed for longlong_t type. Placement of this due to <sys/types.h> 92 * including <sys/select.h> which relies on the presense of the itimerval 93 * structure. 94 */ 95 #ifndef _ASM 96 #include <sys/types.h> 97 #endif /* _ASM */ 98 99 #ifdef __cplusplus 100 extern "C" { 101 #endif 102 103 #if !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__) 104 105 #define DST_NONE 0 /* not on dst */ 106 #define DST_USA 1 /* USA style dst */ 107 #define DST_AUST 2 /* Australian style dst */ 108 #define DST_WET 3 /* Western European dst */ 109 #define DST_MET 4 /* Middle European dst */ 110 #define DST_EET 5 /* Eastern European dst */ 111 #define DST_CAN 6 /* Canada */ 112 #define DST_GB 7 /* Great Britain and Eire */ 113 #define DST_RUM 8 /* Rumania */ 114 #define DST_TUR 9 /* Turkey */ 115 #define DST_AUSTALT 10 /* Australian style with shift in 1986 */ 116 117 /* 118 * Operations on timevals. 119 */ 120 #define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec) 121 #define timercmp(tvp, uvp, cmp) \ 122 (((tvp)->tv_sec == (uvp)->tv_sec) ? \ 123 /* CSTYLED */ \ 124 ((tvp)->tv_usec cmp (uvp)->tv_usec) : \ 125 /* CSTYLED */ \ 126 ((tvp)->tv_sec cmp (uvp)->tv_sec)) 127 128 #define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0 129 130 #endif /* !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__) */ 131 132 #if !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2) || defined(__EXTENSIONS__) 133 /* 134 * Names of the interval timers, and structure 135 * defining a timer setting. 136 */ 137 #define ITIMER_REAL 0 /* Decrements in real time */ 138 #define ITIMER_VIRTUAL 1 /* Decrements in process virtual time */ 139 #define ITIMER_PROF 2 /* Decrements both in process virtual */ 140 /* time and when system is running on */ 141 /* behalf of the process. */ 142 #define ITIMER_REALPROF 3 /* Decrements in real time for real- */ 143 /* time profiling of multithreaded */ 144 /* programs. */ 145 146 #ifndef _ASM 147 struct itimerval { 148 struct timeval it_interval; /* timer interval */ 149 struct timeval it_value; /* current value */ 150 }; 151 152 #if defined(_SYSCALL32) 153 154 struct itimerval32 { 155 struct timeval32 it_interval; 156 struct timeval32 it_value; 157 }; 158 159 #define ITIMERVAL32_TO_ITIMERVAL(itv, itv32) { \ 160 TIMEVAL32_TO_TIMEVAL(&(itv)->it_interval, &(itv32)->it_interval); \ 161 TIMEVAL32_TO_TIMEVAL(&(itv)->it_value, &(itv32)->it_value); \ 162 } 163 164 #define ITIMERVAL_TO_ITIMERVAL32(itv32, itv) { \ 165 TIMEVAL_TO_TIMEVAL32(&(itv32)->it_interval, &(itv)->it_interval); \ 166 TIMEVAL_TO_TIMEVAL32(&(itv32)->it_value, &(itv)->it_value); \ 167 } 168 169 #define ITIMERVAL_OVERFLOW(itv) \ 170 (TIMEVAL_OVERFLOW(&(itv)->it_interval) || \ 171 TIMEVAL_OVERFLOW(&(itv)->it_value)) 172 173 #endif /* _SYSCALL32 */ 174 #endif /* _ASM */ 175 #endif /* !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2) ... */ 176 177 178 #if !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__) 179 /* 180 * Definitions for commonly used resolutions. 181 */ 182 #define SEC 1 183 #define MILLISEC 1000 184 #define MICROSEC 1000000 185 #define NANOSEC 1000000000 186 187 #endif /* !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__) */ 188 189 #ifndef _ASM 190 191 /* 192 * Time expressed as a 64-bit nanosecond counter. 193 */ 194 typedef longlong_t hrtime_t; 195 196 #ifdef _KERNEL 197 198 #include <sys/time_impl.h> 199 #include <sys/mutex.h> 200 201 extern int tick_per_msec; /* clock ticks per millisecond (may be zero) */ 202 extern int msec_per_tick; /* milliseconds per clock tick (may be zero) */ 203 extern int usec_per_tick; /* microseconds per clock tick */ 204 extern int nsec_per_tick; /* nanoseconds per clock tick */ 205 206 /* 207 * Macros to convert from common units of time (sec, msec, usec, nsec, 208 * timeval, timestruc) to clock ticks and vice versa. 209 */ 210 #define TICK_TO_SEC(tick) ((tick) / hz) 211 #define SEC_TO_TICK(sec) ((sec) * hz) 212 213 #define TICK_TO_MSEC(tick) \ 214 (msec_per_tick ? (tick) * msec_per_tick : (tick) / tick_per_msec) 215 #define MSEC_TO_TICK(msec) \ 216 (msec_per_tick ? (msec) / msec_per_tick : (msec) * tick_per_msec) 217 #define MSEC_TO_TICK_ROUNDUP(msec) \ 218 (msec_per_tick ? \ 219 ((msec) == 0 ? 0 : ((msec) - 1) / msec_per_tick + 1) : \ 220 (msec) * tick_per_msec) 221 222 #define TICK_TO_USEC(tick) ((tick) * usec_per_tick) 223 #define USEC_TO_TICK(usec) ((usec) / usec_per_tick) 224 #define USEC_TO_TICK_ROUNDUP(usec) \ 225 ((usec) == 0 ? 0 : USEC_TO_TICK((usec) - 1) + 1) 226 227 #define TICK_TO_NSEC(tick) ((tick) * nsec_per_tick) 228 #define NSEC_TO_TICK(nsec) ((nsec) / nsec_per_tick) 229 #define NSEC_TO_TICK_ROUNDUP(nsec) \ 230 ((nsec) == 0 ? 0 : NSEC_TO_TICK((nsec) - 1) + 1) 231 232 #define TICK_TO_TIMEVAL(tick, tvp) { \ 233 clock_t __tmptck = (tick); \ 234 (tvp)->tv_sec = TICK_TO_SEC(__tmptck); \ 235 (tvp)->tv_usec = TICK_TO_USEC(__tmptck - SEC_TO_TICK((tvp)->tv_sec)); \ 236 } 237 238 #define TICK_TO_TIMEVAL32(tick, tvp) { \ 239 clock_t __tmptck = (tick); \ 240 time_t __tmptm = TICK_TO_SEC(__tmptck); \ 241 (tvp)->tv_sec = (time32_t)__tmptm; \ 242 (tvp)->tv_usec = TICK_TO_USEC(__tmptck - SEC_TO_TICK(__tmptm)); \ 243 } 244 245 #define TICK_TO_TIMESTRUC(tick, tsp) { \ 246 clock_t __tmptck = (tick); \ 247 (tsp)->tv_sec = TICK_TO_SEC(__tmptck); \ 248 (tsp)->tv_nsec = TICK_TO_NSEC(__tmptck - SEC_TO_TICK((tsp)->tv_sec)); \ 249 } 250 251 #define TICK_TO_TIMESTRUC32(tick, tsp) { \ 252 clock_t __tmptck = (tick); \ 253 time_t __tmptm = TICK_TO_SEC(__tmptck); \ 254 (tsp)->tv_sec = (time32_t)__tmptm; \ 255 (tsp)->tv_nsec = TICK_TO_NSEC(__tmptck - SEC_TO_TICK(__tmptm)); \ 256 } 257 258 #define TIMEVAL_TO_TICK(tvp) \ 259 (SEC_TO_TICK((tvp)->tv_sec) + USEC_TO_TICK((tvp)->tv_usec)) 260 261 #define TIMESTRUC_TO_TICK(tsp) \ 262 (SEC_TO_TICK((tsp)->tv_sec) + NSEC_TO_TICK((tsp)->tv_nsec)) 263 264 typedef struct todinfo { 265 int tod_sec; /* seconds 0-59 */ 266 int tod_min; /* minutes 0-59 */ 267 int tod_hour; /* hours 0-23 */ 268 int tod_dow; /* day of week 1-7 */ 269 int tod_day; /* day of month 1-31 */ 270 int tod_month; /* month 1-12 */ 271 int tod_year; /* year 70+ */ 272 } todinfo_t; 273 274 extern int64_t timedelta; 275 extern int timechanged; 276 extern int tod_needsync; 277 extern kmutex_t tod_lock; 278 extern timestruc_t hrestime; 279 extern hrtime_t hres_last_tick; 280 extern int64_t hrestime_adj; 281 extern uint_t adj_shift; 282 283 extern timestruc_t tod_get(void); 284 extern void tod_set(timestruc_t); 285 extern void set_hrestime(timestruc_t *); 286 extern todinfo_t utc_to_tod(time_t); 287 extern time_t tod_to_utc(todinfo_t); 288 extern int hr_clock_lock(void); 289 extern void hr_clock_unlock(int); 290 extern hrtime_t gethrtime(void); 291 extern hrtime_t gethrtime_unscaled(void); 292 extern hrtime_t gethrtime_max(void); 293 extern hrtime_t gethrtime_waitfree(void); 294 extern void scalehrtime(hrtime_t *); 295 extern uint64_t unscalehrtime(hrtime_t); 296 extern void gethrestime(timespec_t *); 297 extern time_t gethrestime_sec(void); 298 extern void gethrestime_lasttick(timespec_t *); 299 extern void hrt2ts(hrtime_t, timestruc_t *); 300 extern hrtime_t ts2hrt(const timestruc_t *); 301 extern void hrt2tv(hrtime_t, struct timeval *); 302 extern hrtime_t tv2hrt(struct timeval *); 303 extern int itimerfix(struct timeval *, int); 304 extern int itimerdecr(struct itimerval *, int); 305 extern void timevaladd(struct timeval *, struct timeval *); 306 extern void timevalsub(struct timeval *, struct timeval *); 307 extern void timevalfix(struct timeval *); 308 extern void dtrace_hres_tick(void); 309 310 #if defined(_SYSCALL32) 311 extern void hrt2ts32(hrtime_t, timestruc32_t *); 312 #endif 313 314 #endif /* _KERNEL */ 315 316 #if !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__) 317 #if defined(__STDC__) 318 int adjtime(struct timeval *, struct timeval *); 319 #else 320 int adjtime(); 321 #endif 322 #endif /* !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) ... */ 323 324 #if !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) || \ 325 defined(_ATFILE_SOURCE) || defined(__EXTENSIONS__) 326 #if defined(__STDC__) 327 int futimesat(int, const char *, const struct timeval *); 328 #else 329 int futimesat(); 330 #endif /* defined(__STDC__) */ 331 #endif /* defined(__ATFILE_SOURCE) */ 332 333 #if !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2) || \ 334 defined(__EXTENSIONS__) 335 336 #if defined(__STDC__) 337 338 int getitimer(int, struct itimerval *); 339 int utimes(const char *, const struct timeval *); 340 #if defined(_XPG4_2) 341 int setitimer(int, const struct itimerval *_RESTRICT_KYWD, 342 struct itimerval *_RESTRICT_KYWD); 343 #else 344 int setitimer(int, struct itimerval *_RESTRICT_KYWD, 345 struct itimerval *_RESTRICT_KYWD); 346 #endif /* defined(_XPG2_2) */ 347 348 #else /* __STDC__ */ 349 350 int gettimer(); 351 int settimer(); 352 int utimes(); 353 #endif /* __STDC__ */ 354 #endif /* !defined(_KERNEL) ... defined(_XPG4_2) */ 355 356 /* 357 * gettimeofday() and settimeofday() were included in SVr4 due to their 358 * common use in BSD based applications. They were to be included exactly 359 * as in BSD, with two parameters. However, AT&T/USL noted that the second 360 * parameter was unused and deleted it, thereby making a routine included 361 * for compatibility, incompatible. 362 * 363 * XSH4.2 (spec 1170) defines gettimeofday and settimeofday to have two 364 * parameters. 365 * 366 * This has caused general disagreement in the application community as to 367 * the syntax of these routines. Solaris defaults to the XSH4.2 definition. 368 * The flag _SVID_GETTOD may be used to force the SVID version. 369 */ 370 #if !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__) 371 372 #if defined(__STDC__) 373 #if defined(_SVID_GETTOD) 374 int settimeofday(struct timeval *); 375 #else 376 int settimeofday(struct timeval *, void *); 377 #endif 378 hrtime_t gethrtime(void); 379 hrtime_t gethrvtime(void); 380 #else /* __STDC__ */ 381 int settimeofday(); 382 hrtime_t gethrtime(); 383 hrtime_t gethrvtime(); 384 #endif /* __STDC__ */ 385 386 #endif /* !(defined _KERNEL) && !defined(__XOPEN_OR_POSIX) ... */ 387 388 #if !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2) || \ 389 defined(__EXTENSIONS__) 390 391 #if defined(__STDC__) 392 #if defined(_SVID_GETTOD) 393 int gettimeofday(struct timeval *); 394 #else 395 int gettimeofday(struct timeval *_RESTRICT_KYWD, void *_RESTRICT_KYWD); 396 #endif 397 #else /* __STDC__ */ 398 int gettimeofday(); 399 #endif /* __STDC__ */ 400 401 #endif /* !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) ... */ 402 403 /* 404 * The inclusion of <time.h> is historical and was added for 405 * backward compatibility in delta 1.2 when a number of definitions 406 * were moved out of <sys/time.h>. More recently, the timespec and 407 * itimerspec structure definitions, along with the _CLOCK_*, CLOCK_*, 408 * _TIMER_*, and TIMER_* symbols were moved to <sys/time_impl.h>, 409 * which is now included by <time.h>. This change was due to POSIX 410 * 1003.1b-1993 and X/Open UNIX 98 requirements. For non-POSIX and 411 * non-X/Open applications, including this header will still make 412 * visible these definitions. 413 */ 414 #if !defined(_BOOT) && !defined(_KERNEL) && \ 415 !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__) 416 #include <time.h> 417 #endif 418 419 /* 420 * The inclusion of <sys/select.h> is needed for the FD_CLR, 421 * FD_ISSET, FD_SET, and FD_SETSIZE macros as well as the 422 * select() prototype defined in the XOpen specifications 423 * beginning with XSH4v2. Placement required after definition 424 * for itimerval. 425 */ 426 #if !defined(_KERNEL) && !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2) || \ 427 defined(__EXTENSIONS__) 428 #include <sys/select.h> 429 #endif 430 431 #endif /* _ASM */ 432 433 #ifdef __cplusplus 434 } 435 #endif 436 437 #endif /* _SYS_TIME_H */ 438