1 files changed, 35 insertions, 0 deletions
diff --git a/sysdeps/ia64/nptl/pthread_spin_lock.c b/sysdeps/ia64/nptl/pthread_spin_lock.c
new file mode 100644
index 0000000000..71268ddc14
--- /dev/null
+++ b/sysdeps/ia64/nptl/pthread_spin_lock.c
@@ -0,0 +1,35 @@
+/* Copyright (C) 2003-2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
+
+   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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "pthreadP.h"
+
+int
+pthread_spin_lock (lock)
+     pthread_spinlock_t *lock;
+{
+  int *p = (int *) lock;
+
+  while (__builtin_expect (__sync_val_compare_and_swap (p, 0, 1), 0))
+    {
+      /* Spin without using the atomic instruction.  */
+      do
+	__asm __volatile ("hint @pause" : : : "memory");
+      while (*p);
+    }
+  return 0;
+}