摘要:
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摘要:
哦,clock_gettime( ) 提供了纳秒的精确度,给程序计时可是不错哦;函数的原型如下:int clock_gettime(clockid_t clk_id, struct timespect *tp);clockid_t clk_id用于指定计时时钟的类型,对于我们Programmr以下三种比较常用:CLOCK_REALTIME, a system-wide realtime clock.CLOCK_PROCESS_CPUTIME_ID, high-resolution timer provided by the CPU for each process.CLOCK_THREAD_. 阅读全文