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microuptime (9)
  • >> microuptime (9) ( FreeBSD man: Ядро )

  • BSD mandoc
     

    NAME

    
    
    binuptime
    
     
    getbinuptime
    
     
    microuptime
    
     
    getmicrouptime
    
     
    nanouptime
    
     
    getnanouptime
    
     - get the time elapsed since boot
    
     
    

    SYNOPSIS

       #include <sys/time.h>
    void binuptime (struct bintime *bt);
    void getbinuptime (struct bintime *bt);
    void microuptime (struct timeval *tv);
    void getmicrouptime (struct timeval *tv);
    void nanouptime (struct timespec *ts);
    void getnanouptime (struct timespec *tsp);
     

    DESCRIPTION

    The binuptime ();
    and getbinuptime ();
    functions store the time elapsed since boot as a Vt struct bintime at the address specified by Fa bt . The microuptime ();
    and getmicrouptime ();
    functions perform the same utility, but record the elapsed time as a Vt struct timeval instead. Similarly the nanouptime ();
    and getnanouptime ();
    functions store the elapsed time as a Vt struct timespec .

    The binuptime (,);
    microuptime (,);
    and nanouptime ();
    functions always query the timecounter to return the current time as precisely as possible. Whereas getbinuptime (,);
    getmicrouptime (,);
    and getnanouptime ();
    functions are abstractions which return a less precise, but faster to obtain, time.

    The intent of the getbinuptime (,);
    getmicrouptime (,);
    and getnanouptime ();
    functions is to enforce the user's preference for timer accuracy versus execution time.  

    SEE ALSO

    bintime(9), getbintime(9), getmicrotime(9), getnanotime(9), microtime(9), nanotime(9), tvtohz(9)  

    AUTHORS

    This manual page was written by An Kelly Yancey Aq kbyanc@posi.net .


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    SEE ALSO
    AUTHORS


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