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2014/10/15 ¤U¤È 10:15:22
iphone Programming Glossary: uint64_tHow to find available memory in iPhone programmatically? http://stackoverflow.com/questions/1020327/how-to-find-available-memory-in-iphone-programmatically
How do I accurately time how long it takes to call a function on the iPhone? http://stackoverflow.com/questions/646815/how-do-i-accurately-time-how-long-it-takes-to-call-a-function-on-the-iphone share improve this question You can use mach_absolute_time to measure in nanoseconds. #import mach mach_time.h uint64_t startTime 0 uint64_t endTime 0 uint64_t elapsedTime 0 uint64_t elapsedTimeNano 0 mach_timebase_info_data_t timeBaseInfo.. question You can use mach_absolute_time to measure in nanoseconds. #import mach mach_time.h uint64_t startTime 0 uint64_t endTime 0 uint64_t elapsedTime 0 uint64_t elapsedTimeNano 0 mach_timebase_info_data_t timeBaseInfo mach_timebase_info timeBaseInfo.. can use mach_absolute_time to measure in nanoseconds. #import mach mach_time.h uint64_t startTime 0 uint64_t endTime 0 uint64_t elapsedTime 0 uint64_t elapsedTimeNano 0 mach_timebase_info_data_t timeBaseInfo mach_timebase_info timeBaseInfo startTime..
CoreAudio AudioTimeStamp.mHostTime clock frequency? http://stackoverflow.com/questions/675626/coreaudio-audiotimestamp-mhosttime-clock-frequency it's different on ARM as well it is pretty easy to convert host time to nanoseconds and nanoseconds to host time. uint64_t systemUptimeNS uint64_t mach_absolute_time hTime2nsFactor systemUptimeNS contains the number of nanoseconds the system was.. as well it is pretty easy to convert host time to nanoseconds and nanoseconds to host time. uint64_t systemUptimeNS uint64_t mach_absolute_time hTime2nsFactor systemUptimeNS contains the number of nanoseconds the system was running not sleeping.. the function mach_wait_until . Assume you want the current thread to sleep for 800 nanoseconds. Here's how you'd do it uint64_t sleepTimeInTicks uint64_t 800 hTime2nsFactor mach_wait_until mach_absolute_time sleepTimeInTicks A little tip If you regularly..
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