2014/10/15 下午 10:10:07

iphone Programming Glossary: htime2nsfactor

Code Sign error: a valid provisioning profile matching the application's Identifier … could not be found

http://stackoverflow.com/questions/4471389/code-sign-error-a-valid-provisioning-profile-matching-the-applications-identif

CoreAudio AudioTimeStamp.mHostTime clock frequency?

http://stackoverflow.com/questions/675626/coreaudio-audiotimestamp-mhosttime-clock-frequency

you can use it to calculate a conversion factor in case you want to convert this number into a real time unit double hTime2nsFactor double tinfo.numer tinfo.denom By casting the first number to double GCC automatically casts the second number to double.. 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 between the last boot and now. If.. 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 need to convert time values to ticks it..