initial import of latest linuxthreads

1 files changed, 69 insertions, 0 deletions

diff --git a/libpthread/linuxthreads/ptclock_gettime.c b/libpthread/linuxthreads/ptclock_gettime.c
new file mode 100644
index 000000000..755f83d10
--- /dev/null
+++ b/libpthread/linuxthreads/ptclock_gettime.c
@@ -0,0 +1,69 @@
+/* Copyright (C) 2001, 2004 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 <time.h>
+#include <libc-internal.h>
+#include "internals.h"
+#include "spinlock.h"
+
+
+#if HP_TIMING_AVAIL
+int
+__pthread_clock_gettime (clockid_t clock_id, hp_timing_t freq,
+			 struct timespec *tp)
+{
+  hp_timing_t tsc, cpuclock_offset;
+  pthread_descr self = thread_self ();
+  pthread_t thread = ((unsigned int) clock_id) >> CLOCK_IDFIELD_SIZE;
+  const unsigned int mask = ~0U >> CLOCK_IDFIELD_SIZE;
+
+  if (thread == 0 || (THREAD_GETMEM (self, p_tid) & mask) == thread)
+    cpuclock_offset = THREAD_GETMEM (self, p_cpuclock_offset);
+  else
+    {
+      pthread_descr th;
+      pthread_handle handle = thread_handle (thread);
+      __pthread_lock (&handle->h_lock, NULL);
+      th = handle->h_descr;
+      if (th == NULL || (th->p_tid & mask) != thread || th->p_terminated)
+	{
+	  __pthread_unlock (&handle->h_lock);
+	  __set_errno (EINVAL);
+	  return -1;
+	}
+      cpuclock_offset = th->p_cpuclock_offset;
+      __pthread_unlock (&handle->h_lock);
+   }
+
+  /* Get the current counter.  */
+  HP_TIMING_NOW (tsc);
+
+  /* Compute the offset since the start time of the process.  */
+  tsc -= 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