/* gethrxtime -- get high resolution real time
- Copyright (C) 2005 Free Software Foundation, Inc.
+ Copyright (C) 2005, 2009-2011 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ 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.
+ the Free Software Foundation; either version 3 of the License, 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
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Written by Paul Eggert. */
#ifndef GETHRXTIME_H_
-#define GETHRXTIME_H_ 1
+# define GETHRXTIME_H_ 1
-#include "xtime.h"
+# include "xtime.h"
/* Get the current time, as a count of the number of nanoseconds since
- an arbitrary epoch (e.g., the system boot time). This clock can't
- be set, is always increasing, and is nearly linear. */
+ an arbitrary epoch (e.g., the system boot time). Prefer a
+ high-resolution clock that is not subject to resetting or
+ drifting. */
-#if HAVE_ARITHMETIC_HRTIME_T && HAVE_DECL_GETHRTIME
-# include <time.h>
+# if HAVE_ARITHMETIC_HRTIME_T && HAVE_DECL_GETHRTIME
+# include <time.h>
static inline xtime_t gethrxtime (void) { return gethrtime (); }
-#else
+# else
xtime_t gethrxtime (void);
-#endif
+# endif
#endif