Timer: minor revisions

* C++11-ify a little.
* Constify relevant methods.
* Make it copy/move constructible.
* Remove unneeded lock from destructor.

Author: kjbracey

drivers/Timer.h

@@ -51,7 +51,7 @@ namespace mbed {
  * }
  * @endcode
  */
-class TimerBase : private NonCopyable<TimerBase> {
+class TimerBase {
 
 public:
     /** Start the timer
@@ -109,7 +109,12 @@ class TimerBase : private NonCopyable<TimerBase> {
 protected:
     TimerBase(const ticker_data_t *data);
     TimerBase(const ticker_data_t *data, bool lock_deepsleep);
+    TimerBase(const TimerBase &t);
+    TimerBase(TimerBase &&t);
     ~TimerBase();
+
+    const TimerBase &operator=(const TimerBase &) = delete;
+
     std::chrono::microseconds slicetime() const;
     TickerDataClock::time_point _start{};   // the start time of the latest slice
     std::chrono::microseconds _time{};    // any accumulated time from previous slices

drivers/source/Timer.cpp

@@ -38,6 +38,23 @@ TimerBase::TimerBase(const ticker_data_t *data, bool lock_deepsleep) : _ticker_d
     reset();
 }
 
+TimerBase::TimerBase(const TimerBase &t) : _start(t._start), _time(t._time),
+    _ticker_data(t._ticker_data), _lock_deepsleep(t._lock_deepsleep), _running(t._running)
+
+{
+    reset();
+    if (_running && _lock_deepsleep) {
+        sleep_manager_lock_deep_sleep();
+    }
+}
+
+TimerBase::TimerBase(TimerBase &&t) : _start(t._start), _time(t._time),
+    _ticker_data(t._ticker_data), _lock_deepsleep(t._lock_deepsleep), _running(t._running)
+
+{
+    t._running = false;
+}
+
 TimerBase::~TimerBase()
 {
     if (_running) {