带有碳框架的微秒计时器

Question

我们可以在Carbon框架中找到相当于：Microseconds（）吗？

 **  Microseconds()
 *  
 *  Summary:
 *    Determines the number of microseconds that have elapsed since
 *    system startup time.
 *  
 *  Discussion:
 *    Return a value representing the number of microseconds since some
 *    point in time, usually since the system was booted.  One
 *    microsecond is 1 * 10^-6 seconds, and so there are one million (
 *    1,000,000 ) microseconds per second.  For reference, in one
 *    microsecond light can travel about 850 feet in a vacuum.
 *    
 *    Microseconds() doesn't necessarily advance while the computer is
 *    asleep, so it should not be used for long duration timings.
 *  
 *  Parameters:
 *    
 *    microTickCount:
 *      The number of microseconds elapsed since system startup.
 *  
 *  Availability:
 *    Mac OS X:         in version 10.0 and later in CoreServices.framework
 *    CarbonLib:        in CarbonLib 1.0 and later
 *    Non-Carbon CFM:   in InterfaceLib 7.1 and later*

Answer 1

Microseconds是核心服务，始终可从Carbon访问。 （Carbon位于核心服务之上）。

它也来自经典的Mac OS。