1 files changed, 46 insertions, 0 deletions
diff --git a/libshouldbeinlibc/maptime.h b/libshouldbeinlibc/maptime.h
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+++ b/libshouldbeinlibc/maptime.h
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+/* Support for mach's mapped time
+
+   Copyright (C) 1996 Free Software Foundation, Inc.
+
+   Written by Miles Bader <miles@gnu.ai.mit.edu>
+
+   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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#ifndef __MAPTIME_H__
+#define __MAPTIME_H__
+
+#include <mach/time_value.h>
+
+/* Return the mach mapped time page in MTIME.  If USE_MACH_DEV is false, then
+   the hurd uptime device DEV_NAME, or "/dev/uptime" if DEV_NAME is 0, is
+   used.  If USE_MACH_DEV is true, the mach device DEV_NAME, or "time" if
+   DEV_NAME is 0, is used; this is a privileged operation.  The mapped uptime
+   may be converted to a struct timeval at any time using read_uptime.  */
+error_t maptime_map (int use_mach_dev, char *dev_name,
+		     volatile struct mapped_time_value **mtime);
+
+/* Read the current time from MTIME into TV.  This should be very fast.  */
+static inline void
+maptime_read (volatile struct mapped_time_value *mtime, struct timeval *tv)
+{
+  do
+    {
+      tv->tv_sec = mtime->seconds;
+      tv->tv_usec = mtime->microseconds;
+    }
+  while (tv->tv_sec != mtime->check_seconds);
+}
+
+#endif /* __MAPTIME_H__ */