1 files changed, 69 insertions, 0 deletions
diff --git a/libpthread/nptl/pthread_clock_gettime.c b/libpthread/nptl/pthread_clock_gettime.c
new file mode 100644
index 000000000..a71174c9c
--- /dev/null
+++ b/libpthread/nptl/pthread_clock_gettime.c
@@ -0,0 +1,69 @@
+/* Copyright (C) 2001, 2002, 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; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <errno.h>
+#include <stdlib.h>
+#include <time.h>
+#include <libc-internal.h>
+#include "pthreadP.h"
+
+
+#if HP_TIMING_AVAIL
+int
+__pthread_clock_gettime (clockid_t clock_id, hp_timing_t freq,
+			 struct timespec *tp)
+{
+  hp_timing_t tsc;
+
+  /* Get the current counter.  */
+  HP_TIMING_NOW (tsc);
+
+  /* This is the ID of the thread we are looking for.  */
+  pid_t tid = ((unsigned int) clock_id) >> CLOCK_IDFIELD_SIZE;
+
+  /* Compute the offset since the start time of the process.  */
+  if (tid == 0 || tid == THREAD_GETMEM (THREAD_SELF, tid))
+    /* Our own clock.  */
+    tsc -= THREAD_GETMEM (THREAD_SELF, cpuclock_offset);
+  else
+    {
+      /* This is more complicated.  We have to locate the thread based
+	 on the ID.  This means walking the list of existing
+	 threads.  */
+      struct pthread *thread = __find_thread_by_id (tid);
+      if (thread == NULL)
+	{
+	  __set_errno (EINVAL);
+	  return -1;
+	}
+
+      /* There is a race here.  The thread might terminate and the stack
+	 become unusable.  But this is the user's problem.  */
+      tsc -= thread->cpuclock_offset;
+    }
+
+  /* Compute the seconds.  */
+  tp->tv_sec = tsc / freq;
+
+  /* And the nanoseconds.  This computation should be stable until
+     we get machines with about 16GHz frequency.  */
+  tp->tv_nsec = ((tsc % freq) * 1000000000ull) / freq;
+
+  return 0;
+}
+#endif