本文介绍 Android 系统中 Looper 类的安全操作方法，包括发送、发布、延迟发布及取消 Runnable 对象等核心功能。
//android style
virtual LRESULT LOOPER_SAFE sendRunnable(shared_ptr<Runnable> obj);
virtual LRESULT LOOPER_SAFE postRunnable(shared_ptr<Runnable> obj);
virtual LRESULT LOOPER_SAFE postDelayedRunnable(shared_ptr<Runnable> obj, UINT ms);
virtual void LOOPER_SAFE cancelRunnable(shared_ptr<Runnable> obj);
virtual void LOOPER_SAFE removeCallbacks(shared_ptr<Runnable> obj){cancelRunnable(obj);}
virtual LRESULT LOOPER_SAFE sendRunnable(shared_ptr<Runnable> obj);
virtual LRESULT LOOPER_SAFE postRunnable(shared_ptr<Runnable> obj);
virtual LRESULT LOOPER_SAFE postDelayedRunnable(shared_ptr<Runnable> obj, UINT ms);
virtual void LOOPER_SAFE cancelRunnable(shared_ptr<Runnable> obj);
virtual void LOOPER_SAFE removeCallbacks(shared_ptr<Runnable> obj){cancelRunnable(obj);}
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