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authorRoland McGrath <roland@hack.frob.com>2014-06-12 09:05:54 -0700
committerRoland McGrath <roland@hack.frob.com>2014-06-12 09:05:54 -0700
commit45262aeedf2f56dcd3b30e37630ea85bb4f55603 (patch)
tree726ce7b82a5d652713e514fa2811244fe647e5a7 /sysdeps/sh/nptl/pthread_spin_lock.c
parent35a5e3e338ae17f3d42c60a708763c5d498fb840 (diff)
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Move SH code out of nptl/ subdirectory.
Diffstat (limited to 'sysdeps/sh/nptl/pthread_spin_lock.c')
-rw-r--r--sysdeps/sh/nptl/pthread_spin_lock.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/sysdeps/sh/nptl/pthread_spin_lock.c b/sysdeps/sh/nptl/pthread_spin_lock.c
new file mode 100644
index 0000000000..e4bf190075
--- /dev/null
+++ b/sysdeps/sh/nptl/pthread_spin_lock.c
@@ -0,0 +1,34 @@
+/* Copyright (C) 2003-2014 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "pthreadP.h"
+
+int
+pthread_spin_lock (lock)
+     pthread_spinlock_t *lock;
+{
+  unsigned int val;
+
+  do
+    asm volatile ("tas.b @%1; movt %0"
+		  : "=&r" (val)
+		  : "r" (lock)
+		  : "memory");
+  while (val == 0);
+
+  return 0;
+}