time.h 2.0 KB

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  1. /* System-dependent timing definitions. Linux version.
  2. Copyright (C) 1996, 1997 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Library General Public License as
  6. published by the Free Software Foundation; either version 2 of the
  7. License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Library General Public License for more details.
  12. You should have received a copy of the GNU Library General Public
  13. License along with the GNU C Library; see the file COPYING.LIB. If not,
  14. write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  15. Boston, MA 02111-1307, USA. */
  16. /*
  17. * Never include this file directly; use <time.h> instead.
  18. */
  19. #ifndef __need_timeval
  20. # ifndef _BITS_TIME_H
  21. # define _BITS_TIME_H 1
  22. /* ISO/IEC 9899:1990 7.12.1: <time.h>
  23. The macro `CLOCKS_PER_SEC' is the number per second of the value
  24. returned by the `clock' function. */
  25. /* CAE XSH, Issue 4, Version 2: <time.h>
  26. The value of CLOCKS_PER_SEC is required to be 1 million on all
  27. XSI-conformant systems. */
  28. # define CLOCKS_PER_SEC 1000000
  29. # ifndef __STRICT_ANSI__
  30. /* Even though CLOCKS_PER_SEC has such a strange value CLK_TCK
  31. presents the real value for clock ticks per second for the system. */
  32. # define CLK_TCK 100
  33. # endif
  34. # endif /* bits/time.h */
  35. #endif
  36. #ifdef __need_timeval
  37. # undef __need_timeval
  38. # ifndef _STRUCT_TIMEVAL
  39. # define _STRUCT_TIMEVAL 1
  40. # include <bits/types.h>
  41. /* A time value that is accurate to the nearest
  42. microsecond but also has a range of years. */
  43. struct timeval
  44. {
  45. __time_t tv_sec; /* Seconds. */
  46. __time_t tv_usec; /* Microseconds. */
  47. };
  48. # endif /* struct timeval */
  49. #endif /* need timeval */