1 files changed, 58 insertions, 0 deletions
diff --git a/tools/KSE/ksetest/simplelock.h b/tools/KSE/ksetest/simplelock.h
new file mode 100644
index 000000000000..591f4a5c9ef3
--- /dev/null
+++ b/tools/KSE/ksetest/simplelock.h
@@ -0,0 +1,58 @@
+/*-
+ * Copyright (c) 2002 David Xu (davidxu@freebsd.org).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _SIMPLELOCK_H
+#define _SIMPLELOCK_H
+
+#include <machine/asmacros.h>
+#include <machine/atomic.h>
+
+struct simplelock {
+	int s_lock;
+};
+
+static inline void
+simplelock_init(struct simplelock *lock)
+{
+	lock->s_lock = 0;
+}
+
+static inline void
+simplelock_lock(struct simplelock *lock)
+{
+	while (atomic_cmpset_int(&lock->s_lock, 0, 1))
+		;
+}
+
+static void simplelock_unlock(struct simplelock *lock)
+{
+	atomic_store_rel_int(&lock->s_lock, 0);
+}
+
+#endif
+