maint.mk: avoid sc_prohibit_always-defined_macros failure in coreutils

[gnulib.git] / lib / gethrxtime.h

diff --git a/lib/gethrxtime.h b/lib/gethrxtime.h
index 2c0e36d..481f3f5 100644 (file)
--- a/lib/gethrxtime.h
+++ b/lib/gethrxtime.h
@@ -1,11 +1,11 @@
 /* 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
@@ -13,25 +13,25 @@
    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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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