Update.

2003-07-03  Ulrich Drepper  <drepper@redhat.com>

	* sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_AT_CLKTCK):
	Define.
	* sysdeps/unix/sysv/linux/prof-freq.h: New file.

1 files changed, 51 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/prof-freq.c b/sysdeps/unix/sysv/linux/prof-freq.c
new file mode 100644
index 0000000000..00e963556c
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/prof-freq.c
@@ -0,0 +1,51 @@
+/* Determine realtime clock frequency.
+   Copyright (C) 2003 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 <sys/time.h>
+#include <libc-internal.h>
+#include "kernel-features.h"
+#include <ldsodefs.h>
+
+
+int
+__profile_frequency (void)
+{
+#ifdef __ASSUME_AT_CLKTCK
+  return GL(dl_clktck);
+#else
+  if (GL(dl_clktck) != )
+    return GL(dl_clktck);
+
+  struct itimerval tim;
+
+  tim.it_interval.tv_sec = 0;
+  tim.it_interval.tv_usec = 1;
+  tim.it_value.tv_sec = 0;
+  tim.it_value.tv_usec = 0;
+
+  __setitimer (ITIMER_REAL, &tim, 0);
+  __setitimer (ITIMER_REAL, 0, &tim);
+
+  if (tim.it_interval.tv_usec < 2)
+    return 0;
+
+  return 1000000 / tim.it_interval.tv_usec;
+#endif
+}
+libc_hidden_def (__profile_frequency)