自己编写的关于定时器使用方面的例子，其中包括多种定时器的实现（多媒体，queryPerformance等），其中罪突出的是设计了一个基于多线程同步方式实现的1ms精度的定时器，改方法精度高占用资源少。-I have written on the timer in the use of examples, including the realization of a wide range of timer (multimedia, queryPerformance, etc.), which is designed to highlight the crime of a synchronization-based multi-threaded approach to achieve 1ms precision timers, change method high accuracy and less occupied resources.