[thirdparty/glibc.git] / sysdeps / unix / sysv / linux / bits / time.h

/* System-dependent timing definitions.  Linux version.
   Copyright (C) 1996,1997,1999-2003,2010,2011 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

/*
 * Never include this file directly; use <time.h> instead.
 */

#if defined __need_timeval || defined __USE_GNU
# ifndef _STRUCT_TIMEVAL
#  define _STRUCT_TIMEVAL	1
#  include <bits/types.h>

/* A time value that is accurate to the nearest
   microsecond but also has a range of years.  */
struct timeval
  {
    __time_t tv_sec;		/* Seconds.  */
    __suseconds_t tv_usec;	/* Microseconds.  */
  };
# endif	/* struct timeval */
#endif

#ifndef __need_timeval
# ifndef _BITS_TIME_H
#  define _BITS_TIME_H	1

/* ISO/IEC 9899:1990 7.12.1: <time.h>
   The macro `CLOCKS_PER_SEC' is the number per second of the value
   returned by the `clock' function. */
/* CAE XSH, Issue 4, Version 2: <time.h>
   The value of CLOCKS_PER_SEC is required to be 1 million on all
   XSI-conformant systems. */
#  define CLOCKS_PER_SEC  1000000l

#  if !defined __STRICT_ANSI__ && !defined __USE_XOPEN2K
/* Even though CLOCKS_PER_SEC has such a strange value CLK_TCK
   presents the real value for clock ticks per second for the system.  */
#   include <bits/types.h>
extern long int __sysconf (int);
#   define CLK_TCK ((__clock_t) __sysconf (2))	/* 2 is _SC_CLK_TCK */
#  endif

#  ifdef __USE_POSIX199309
/* Identifier for system-wide realtime clock.  */
#   define CLOCK_REALTIME		0
/* Monotonic system-wide clock.  */
#   define CLOCK_MONOTONIC		1
/* High-resolution timer from the CPU.  */
#   define CLOCK_PROCESS_CPUTIME_ID	2
/* Thread-specific CPU-time clock.  */
#   define CLOCK_THREAD_CPUTIME_ID	3
/* Monotonic system-wide clock, not adjusted for frequency scaling.  */
#   define CLOCK_MONOTONIC_RAW		4
/* Identifier for system-wide realtime clock, updated only on ticks.  */
#   define CLOCK_REALTIME_COARSE	5
/* Monotonic system-wide clock, updated only on ticks.  */
#   define CLOCK_MONOTONIC_COARSE	6
/* Monotonic system-wide clock that includes time spent in suspension.  */
#   define CLOCK_BOOTTIME		7
/* Like CLOCK_REALTIME but also wakes suspended system.  */
#   define CLOCK_REALTIME_ALARM		8
/* Like CLOCK_BOOTTIME but also wakes suspended system.  */
#   define CLOCK_BOOTTIME_ALARM		9

/* Flag to indicate time is absolute.  */
#   define TIMER_ABSTIME		1
#  endif

#  ifdef __USE_GNU
#   include <bits/timex.h>

__BEGIN_DECLS

/* Tune a POSIX clock.  */
extern int clock_adjtime (__clockid_t __clock_id, struct timex *__utx) __THROW;

__END_DECLS
#  endif /* use GNU */

# endif	/* bits/time.h */
#endif

#undef __need_timeval
Commit	Line	Data
83fe108b UD	1	/* System-dependent timing definitions. Linux version.
	2	Copyright (C) 1996,1997,1999-2003,2010,2011 Free Software Foundation, Inc.
	3	This file is part of the GNU C Library.
	4
	5	The GNU C Library is free software; you can redistribute it and/or
	6	modify it under the terms of the GNU Lesser General Public
	7	License as published by the Free Software Foundation; either
	8	version 2.1 of the License, or (at your option) any later version.
	9
	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
94521213 UD	74	/* Monotonic system-wide clock that includes time spent in suspension. */
94521213 UD	75	# define CLOCK_BOOTTIME 7
05bb4a68 UD	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
83fe108b UD	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