2002-06-27 Jeff Johnston <jjohnstn@redhat.com>

        * libc/sys/linux/Makefile.am: Add new clock routines.
        * libc/sys/linux/Makefile.in: Regenerated.
        * libc/sys/linux/clock_getres.c: New file.
        * libc/sys/linux/clock_gettime.c: Ditto.
        * libc/sys/linux/clock_settime.c: Ditto.
        * libc/sys/linux/hp-timing.h: Ditto.
        * libc/sys/linux/libc-internal.h: Ditto.
        * libc/sys/linux/sysconf.c: Fix typo.
        * libc/sys/linux/include/time.h: New file.
        * libc/sys/linux/machine/hp-timing.h: New file.
        * libc/sys/linux/machine/i386/Makefile.am: Add new files.
        * libc/sys/linux/machine/i386/Makefile.in: Regenerated.
        * libc/sys/linux/machine/i386/get_clockfreq.c: New file.
        * libc/sys/linux/machine/i386/hp-timing.c: Ditto.
        * libc/sys/linux/machine/i386/hp-timing.h: Ditto.
        * libc/sys/linux/sys/linux_time.h: Ditto.
        * libc/sys/linux/sys/time.h: Remove include of <linux/time.h> and
        replace with <sys/linux_time.h>.

1 files changed, 94 insertions, 0 deletions

diff --git a/newlib/libc/sys/linux/clock_getres.c b/newlib/libc/sys/linux/clock_getres.c
new file mode 100644
index 000000000..8bf648f51
--- /dev/null
+++ b/newlib/libc/sys/linux/clock_getres.c
@@ -0,0 +1,94 @@
+/* Copyright (C) 1999, 2000, 2001 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.  */
+
+#include <errno.h>
+#include <stdint.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/param.h>
+#include <libc-internal.h>
+
+
+#if HP_TIMING_AVAIL
+/* Clock frequency of the processor.  */
+static long int nsec;
+#endif
+
+
+/* Get resolution of clock.  */
+int
+clock_getres (clockid_t clock_id, struct timespec *res)
+{
+  int retval = -1;
+
+  switch (clock_id)
+    {
+    case CLOCK_REALTIME:
+      {
+	long int clk_tck = sysconf (_SC_CLK_TCK);
+
+	if (__builtin_expect (clk_tck != -1, 1))
+	  {
+	    /* This implementation assumes that the realtime clock has a
+	       resolution higher than 1 second.  This is the case for any
+	       reasonable implementation.  */
+	    res->tv_sec = 0;
+	    res->tv_nsec = 1000000000 / clk_tck;
+
+	    retval = 0;
+	  }
+      }
+      break;
+
+#if HP_TIMING_AVAIL
+    case CLOCK_PROCESS_CPUTIME_ID:
+    case CLOCK_THREAD_CPUTIME_ID:
+      {
+	if (__builtin_expect (nsec == 0, 0))
+	  {
+	    hp_timing_t freq;
+
+	    /* This can only happen if we haven't initialized the `freq'
+	       variable yet.  Do this now. We don't have to protect this
+	       code against multiple execution since all of them should
+	       lead to the same result.  */
+	    freq = __get_clockfreq ();
+	    if (__builtin_expect (freq == 0, 0))
+	      /* Something went wrong.  */
+	      break;
+
+	    nsec = MAX (UINT64_C (1000000000) / freq, 1);
+	  }
+
+	/* File in the values.  The seconds are always zero (unless we
+	   have a 1Hz machine).  */
+	res->tv_sec = 0;
+	res->tv_nsec = nsec;
+
+	retval = 0;
+      }
+      break;
+#endif
+
+    default:
+      __set_errno (EINVAL);
+      break;
+    }
+
+  return retval;
+}