timespec.h
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timespec.h
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	/* timespec -- System time interface

	Copyright (C) 2000, 2002, 2004, 2005 Free Software Foundation, Inc.

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2, or (at your option)
	any later version.

	This program 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 General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software Foundation,
	Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */

	#if ! defined TIMESPEC_H
	# define TIMESPEC_H

	# include <sys/types.h>
	# if TIME_WITH_SYS_TIME
	# include <sys/time.h>
	# include <time.h>
	# else
	# if HAVE_SYS_TIME_H
	# include <sys/time.h>
	# else
	# include <time.h>
	# endif
	# endif

	# if ! HAVE_STRUCT_TIMESPEC
	/* Some systems don't define this struct, e.g., AIX 4.1, Ultrix 4.3. */
	struct timespec
	{
	time_t tv_sec;
	long tv_nsec;
	};
	# endif

	/* Return negative, zero, positive if A < B, A == B, A > B, respectively.
	Assume the nanosecond components are in range, or close to it. */
	static inline int
	timespec_cmp (struct timespec a, struct timespec b)
	{
	return (a.tv_sec < b.tv_sec ? -1
	: a.tv_sec > b.tv_sec ? 1
	: a.tv_nsec - b.tv_nsec);
	}

	# if ! HAVE_DECL_NANOSLEEP
	/* Don't specify a prototype here. Some systems (e.g., OSF) declare
	nanosleep with a conflicting one (const-less first parameter). */
	int nanosleep ();
	# endif

	void gettime (struct timespec *);
	int settime (struct timespec const *);

	#endif

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