Windows 2000下高精度计时的研究

Research of high-resolution timing methods in Windows 2000

指出了在Windows 2000下实现高精度计时的必要性和重要性。阐述了6种实现高精度计时的方法,并对每种方法的实现机制和使用方法进行了一定的分析和研究,指出了各种方法各自的优点和不足之处,并结合实际的编程需要,相应地使用每种方法都实现了一个具体的延时函数。分别给出了各种方法的最小精度、计时的最大值,并结合实际给出了它们适用的范围。

Firstly, the necessity and the importance to realize the high-resolution timing in windows 2000 were pointed. Six high- resolution timing methods were expatiated, after that, the realization mechanisms and using means were analyzed and researched for every method, and the excellence and disadvantage ofevery method was also indicated. Considering the necessity ofpractice programming, a delay function was implemented by using every method correspondingly. Finally, the minimum precision and the maximum timing value of every high-resolution timing method were expatiated, including the best scopes where they are applied.