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diff --git a/ext/TimerEvent.h b/ext/TimerEvent.h
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+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MBED_TIMEREVENT_H
+#define MBED_TIMEREVENT_H
+
+#include "ticker_api.h"
+#include "us_ticker_api.h"
+
+namespace mbed {
+
+/** Base abstraction for timer interrupts
+*/
+class TimerEvent {
+public:
+    TimerEvent();
+    TimerEvent(const ticker_data_t *data);
+
+    /** The handler registered with the underlying timer interrupt
+     */
+    static void irq(uint32_t id);
+
+    /** Destruction removes it...
+     */
+    virtual ~TimerEvent();
+
+protected:
+    // The handler called to service the timer event of the derived class
+    virtual void handler() = 0;
+
+    // insert in to linked list
+    void insert(timestamp_t timestamp);
+
+    // remove from linked list, if in it
+    void remove();
+
+    ticker_event_t event;
+
+    const ticker_data_t *_ticker_data;
+};
+
+} // namespace mbed
+
+#endif