timex.h 4.7 KB

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  1. /* Copyright (C) 1995, 1996, 1997, 1999 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Library General Public License as
  5. published by the Free Software Foundation; either version 2 of the
  6. License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Library General Public License for more details.
  11. You should have received a copy of the GNU Library General Public
  12. License along with the GNU C Library; see the file COPYING.LIB. If not,
  13. write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  14. Boston, MA 02111-1307, USA. */
  15. #ifndef _SYS_TIMEX_H
  16. #define _SYS_TIMEX_H 1
  17. #include <features.h>
  18. #include <sys/time.h>
  19. /* These definitions from linux/timex.h as of 2.2.0. */
  20. struct ntptimeval
  21. {
  22. struct timeval time; /* current time (ro) */
  23. long int maxerror; /* maximum error (us) (ro) */
  24. long int esterror; /* estimated error (us) (ro) */
  25. };
  26. struct timex
  27. {
  28. unsigned int modes; /* mode selector */
  29. long int offset; /* time offset (usec) */
  30. long int freq; /* frequency offset (scaled ppm) */
  31. long int maxerror; /* maximum error (usec) */
  32. long int esterror; /* estimated error (usec) */
  33. int status; /* clock command/status */
  34. long int constant; /* pll time constant */
  35. long int precision; /* clock precision (usec) (read only) */
  36. long int tolerance; /* clock frequency tolerance (ppm) (read only) */
  37. struct timeval time; /* (read only) */
  38. long int tick; /* (modified) usecs between clock ticks */
  39. long int ppsfreq; /* pps frequency (scaled ppm) (ro) */
  40. long int jitter; /* pps jitter (us) (ro) */
  41. int shift; /* interval duration (s) (shift) (ro) */
  42. long int stabil; /* pps stability (scaled ppm) (ro) */
  43. long int jitcnt; /* jitter limit exceeded (ro) */
  44. long int calcnt; /* calibration intervals (ro) */
  45. long int errcnt; /* calibration errors (ro) */
  46. long int stbcnt; /* stability limit exceeded (ro) */
  47. /* ??? */
  48. int :32; int :32; int :32; int :32;
  49. int :32; int :32; int :32; int :32;
  50. int :32; int :32; int :32; int :32;
  51. };
  52. /* Mode codes (timex.mode) */
  53. #define ADJ_OFFSET 0x0001 /* time offset */
  54. #define ADJ_FREQUENCY 0x0002 /* frequency offset */
  55. #define ADJ_MAXERROR 0x0004 /* maximum time error */
  56. #define ADJ_ESTERROR 0x0008 /* estimated time error */
  57. #define ADJ_STATUS 0x0010 /* clock status */
  58. #define ADJ_TIMECONST 0x0020 /* pll time constant */
  59. #define ADJ_TICK 0x4000 /* tick value */
  60. #define ADJ_OFFSET_SINGLESHOT 0x8001 /* old-fashioned adjtime */
  61. /* xntp 3.4 compatibility names */
  62. #define MOD_OFFSET ADJ_OFFSET
  63. #define MOD_FREQUENCY ADJ_FREQUENCY
  64. #define MOD_MAXERROR ADJ_MAXERROR
  65. #define MOD_ESTERROR ADJ_ESTERROR
  66. #define MOD_STATUS ADJ_STATUS
  67. #define MOD_TIMECONST ADJ_TIMECONST
  68. #define MOD_CLKB ADJ_TICK
  69. #define MOD_CLKA ADJ_OFFSET_SINGLESHOT /* 0x8000 in original */
  70. /* Status codes (timex.status) */
  71. #define STA_PLL 0x0001 /* enable PLL updates (rw) */
  72. #define STA_PPSFREQ 0x0002 /* enable PPS freq discipline (rw) */
  73. #define STA_PPSTIME 0x0004 /* enable PPS time discipline (rw) */
  74. #define STA_FLL 0x0008 /* select frequency-lock mode (rw) */
  75. #define STA_INS 0x0010 /* insert leap (rw) */
  76. #define STA_DEL 0x0020 /* delete leap (rw) */
  77. #define STA_UNSYNC 0x0040 /* clock unsynchronized (rw) */
  78. #define STA_FREQHOLD 0x0080 /* hold frequency (rw) */
  79. #define STA_PPSSIGNAL 0x0100 /* PPS signal present (ro) */
  80. #define STA_PPSJITTER 0x0200 /* PPS signal jitter exceeded (ro) */
  81. #define STA_PPSWANDER 0x0400 /* PPS signal wander exceeded (ro) */
  82. #define STA_PPSERROR 0x0800 /* PPS signal calibration error (ro) */
  83. #define STA_CLOCKERR 0x1000 /* clock hardware fault (ro) */
  84. #define STA_RONLY (STA_PPSSIGNAL | STA_PPSJITTER | STA_PPSWANDER | \
  85. STA_PPSERROR | STA_CLOCKERR) /* read-only bits */
  86. /* Clock states (time_state) */
  87. #define TIME_OK 0 /* clock synchronized, no leap second */
  88. #define TIME_INS 1 /* insert leap second */
  89. #define TIME_DEL 2 /* delete leap second */
  90. #define TIME_OOP 3 /* leap second in progress */
  91. #define TIME_WAIT 4 /* leap second has occurred */
  92. #define TIME_ERROR 5 /* clock not synchronized */
  93. #define TIME_BAD TIME_ERROR /* bw compat */
  94. /* Maximum time constant of the PLL. */
  95. #define MAXTC 6
  96. __BEGIN_DECLS
  97. extern int __adjtimex __P ((struct timex *__ntx));
  98. extern int adjtimex __P ((struct timex *__ntx));
  99. extern int ntp_gettime __P ((struct ntptimeval *__ntv));
  100. extern int ntp_adjtime __P ((struct timex *__tntx));
  101. __END_DECLS
  102. #endif /* sys/timex.h */