Cleanup: Re-organise source dir

[userspace-rcu.git] / include / urcu / uatomic / arm.h

diff --git a/include/urcu/uatomic/arm.h b/include/urcu/uatomic/arm.h
new file mode 100644 (file)
index 0000000..fd8fe6a
--- /dev/null
+++ b/include/urcu/uatomic/arm.h
@@ -0,0 +1,43 @@
+#ifndef _URCU_ARCH_UATOMIC_ARM_H
+#define _URCU_ARCH_UATOMIC_ARM_H
+
+/*
+ * Atomics for ARM.  This approach is usable on kernels back to 2.6.15.
+ *
+ * Copyright (c) 1991-1994 by Xerox Corporation.  All rights reserved.
+ * Copyright (c) 1996-1999 by Silicon Graphics.  All rights reserved.
+ * Copyright (c) 1999-2004 Hewlett-Packard Development Company, L.P.
+ * Copyright (c) 2009      Mathieu Desnoyers
+ * Copyright (c) 2010      Paul E. McKenney, IBM Corporation
+ *                        (Adapted from uatomic_arch_ppc.h)
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose,  provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ *
+ * Code inspired from libuatomic_ops-1.2, inherited in part from the
+ * Boehm-Demers-Weiser conservative garbage collector.
+ */
+
+#include <urcu/compiler.h>
+#include <urcu/system.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* xchg */
+#define uatomic_xchg(addr, v) __sync_lock_test_and_set(addr, v)
+
+#ifdef __cplusplus
+}
+#endif
+
+#include <urcu/uatomic/generic.h>
+
+#endif /* _URCU_ARCH_UATOMIC_ARM_H */