initial code repo

[stor4nfv.git] / src / ceph / src / common / simple_spin.h

diff --git a/src/ceph/src/common/simple_spin.h b/src/ceph/src/common/simple_spin.h
new file mode 100644 (file)
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--- /dev/null
+++ b/src/ceph/src/common/simple_spin.h
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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2011 New Dream Network
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+
+#ifndef CEPH_SIMPLE_SPIN_H
+#define CEPH_SIMPLE_SPIN_H
+
+#include <atomic>
+
+inline void simple_spin_lock(std::atomic_flag& lock)
+{
+ while(lock.test_and_set(std::memory_order_acquire))
+  ;
+}
+
+inline void simple_spin_unlock(std::atomic_flag& lock)
+{
+ lock.clear(std::memory_order_release);
+}
+
+inline void simple_spin_lock(std::atomic_flag *lock)
+{
+ simple_spin_lock(*lock);
+}
+
+inline void simple_spin_unlock(std::atomic_flag *lock)
+{
+ simple_spin_unlock(*lock);
+}
+
+#endif