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01: /* System-dependent timing definitions.  Linux version.
02:    Copyright (C) 1996,1997,1999-2003,2010,2011 Free Software Foundation, Inc.
03:    This file is part of the GNU C Library.
04: 
05:    The GNU C Library is free software; you can redistribute it and/or
06:    modify it under the terms of the GNU Lesser General Public
07:    License as published by the Free Software Foundation; either
08:    version 2.1 of the License, or (at your option) any later version.
09: 
10:    The GNU C Library is distributed in the hope that it will be useful,
11:    but WITHOUT ANY WARRANTY; without even the implied warranty of
12:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13:    Lesser General Public License for more details.
14: 
15:    You should have received a copy of the GNU Lesser General Public
16:    License along with the GNU C Library; if not, write to the Free
17:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18:    02111-1307 USA.  */
19: 
20: /*
21:  * Never include this file directly; use <time.h> instead.
22:  */
23: 
24: #if defined __need_timeval || defined __USE_GNU
25: # ifndef _STRUCT_TIMEVAL
26: #  define _STRUCT_TIMEVAL       1
27: #  include <bits/types.h>
28: 
29: /* A time value that is accurate to the nearest
30:    microsecond but also has a range of years.  */
31: struct timeval
32:   {
33:     __time_t tv_sec;            /* Seconds.  */
34:     __suseconds_t tv_usec;      /* Microseconds.  */
35:   };
36: # endif /* struct timeval */
37: #endif
38: 
39: #ifndef __need_timeval
40: # ifndef _BITS_TIME_H
41: #  define _BITS_TIME_H  1
42: 
43: /* ISO/IEC 9899:1990 7.12.1: <time.h>
44:    The macro `CLOCKS_PER_SEC' is the number per second of the value
45:    returned by the `clock' function. */
46: /* CAE XSH, Issue 4, Version 2: <time.h>
47:    The value of CLOCKS_PER_SEC is required to be 1 million on all
48:    XSI-conformant systems. */
49: #  define CLOCKS_PER_SEC  1000000l
50: 
51: #  if !defined __STRICT_ANSI__ && !defined __USE_XOPEN2K
52: /* Even though CLOCKS_PER_SEC has such a strange value CLK_TCK
53:    presents the real value for clock ticks per second for the system.  */
54: #   include <bits/types.h>
55: extern long int __sysconf (int);
56: #   define CLK_TCK ((__clock_t) __sysconf (2))  /* 2 is _SC_CLK_TCK */
57: #  endif
58: 
59: #  ifdef __USE_POSIX199309
60: /* Identifier for system-wide realtime clock.  */
61: #   define CLOCK_REALTIME               0
62: /* Monotonic system-wide clock.  */
63: #   define CLOCK_MONOTONIC              1
64: /* High-resolution timer from the CPU.  */
65: #   define CLOCK_PROCESS_CPUTIME_ID     2
66: /* Thread-specific CPU-time clock.  */
67: #   define CLOCK_THREAD_CPUTIME_ID      3
68: /* Monotonic system-wide clock, not adjusted for frequency scaling.  */
69: #   define CLOCK_MONOTONIC_RAW          4
70: /* Identifier for system-wide realtime clock, updated only on ticks.  */
71: #   define CLOCK_REALTIME_COARSE        5
72: /* Monotonic system-wide clock, updated only on ticks.  */
73: #   define CLOCK_MONOTONIC_COARSE       6
74: /* Monotonic system-wide clock that includes time spent in suspension.  */
75: #   define CLOCK_BOOTTIME               7
76: /* Like CLOCK_REALTIME but also wakes suspended system.  */
77: #   define CLOCK_REALTIME_ALARM         8
78: /* Like CLOCK_BOOTTIME but also wakes suspended system.  */
79: #   define CLOCK_BOOTTIME_ALARM         9
80: 
81: /* Flag to indicate time is absolute.  */
82: #   define TIMER_ABSTIME                1
83: #  endif
84: 
85: #  ifdef __USE_GNU
86: #   include <bits/timex.h>
87: 
88: __BEGIN_DECLS
89: 
90: /* Tune a POSIX clock.  */
91: extern int clock_adjtime (__clockid_t __clock_id, struct timex *__utx) __THROW;
92: 
93: __END_DECLS
94: #  endif /* use GNU */
95: 
96: # endif /* bits/time.h */
97: #endif
98: 
99: #undef __need_timeval
100: 

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