diff -r 000000000000 -r 6474c204b198 tools/profiler/LulRWLock.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/profiler/LulRWLock.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,42 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef LulRWLock_h
+#define LulRWLock_h
+
+#include "LulPlatformMacros.h"
+#include <pthread.h>
+
+// This class provides a simple wrapper around reader-writer locks.
+// This is necessary because Android 2.2's libpthread does not
+// provide such functionality, so there has to be a way to provide
+// an alternative with an equivalent interface.
+
+namespace lul {
+
+class LulRWLock {
+
+public:
+  LulRWLock();
+  ~LulRWLock();
+  void WrLock();
+  void RdLock();
+  void Unlock();
+
+private:
+#if defined(LUL_OS_android)
+  pthread_mutex_t mLock;
+#elif defined(LUL_OS_linux)
+  pthread_rwlock_t mLock;
+#else
+# error "Unsupported OS"
+#endif
+
+};
+
+} // namespace lul
+
+#endif // LulRWLock_h