The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/kern/time_stamp.c

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    1 /* 
    2  * Mach Operating System
    3  * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
    4  * All Rights Reserved.
    5  * 
    6  * Permission to use, copy, modify and distribute this software and its
    7  * documentation is hereby granted, provided that both the copyright
    8  * notice and this permission notice appear in all copies of the
    9  * software, derivative works or modified versions, and any portions
   10  * thereof, and that both notices appear in supporting documentation.
   11  * 
   12  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   13  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
   14  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   15  * 
   16  * Carnegie Mellon requests users of this software to return to
   17  * 
   18  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   19  *  School of Computer Science
   20  *  Carnegie Mellon University
   21  *  Pittsburgh PA 15213-3890
   22  * 
   23  * any improvements or extensions that they make and grant Carnegie Mellon
   24  * the rights to redistribute these changes.
   25  */
   26 /*
   27  * HISTORY
   28  * $Log:        time_stamp.c,v $
   29  * Revision 2.6  93/01/14  17:37:21  danner
   30  *      64bit cleanup.
   31  *      [92/12/10  18:14:01  af]
   32  * 
   33  * Revision 2.5  92/08/03  17:40:20  jfriedl
   34  *      removed silly prototypes
   35  *      [92/08/02            jfriedl]
   36  * 
   37  * Revision 2.4  92/05/21  17:16:57  jfriedl
   38  *      Cleanup to quiet gcc warnings.
   39  *      [92/05/16            jfriedl]
   40  * 
   41  * Revision 2.3  91/05/14  16:49:34  mrt
   42  *      Correcting copyright
   43  * 
   44  * Revision 2.2  91/02/05  17:30:55  mrt
   45  *      Changed to new Mach copyright
   46  *      [91/02/01  16:20:38  mrt]
   47  * 
   48  * Revision 2.1  89/08/03  15:53:16  rwd
   49  * Created.
   50  * 
   51  * 16-Jun-87  David Black (dlb) at Carnegie-Mellon University
   52  *      machtimer.h --> timer.h  Changed to cpp symbols for multimax.
   53  *
   54  *  5-Apr-87  Avadis Tevanian (avie) at Carnegie-Mellon University
   55  *      ts.h -> time_stamp.h
   56  *
   57  * 30-Mar-87  David Black (dlb) at Carnegie-Mellon University
   58  *      Created.
   59  */ 
   60 
   61 #include <mach/std_types.h>
   62 #include <sys/time.h>
   63 #include <kern/time_stamp.h>
   64 
   65 /*
   66  *      ts.c - kern_timestamp system call.
   67  */
   68 #ifdef  multimax
   69 #include <mmax/timer.h>
   70 #endif  multimax
   71 
   72 
   73 
   74 kern_return_t
   75 kern_timestamp(tsp)
   76 struct  tsval   *tsp;
   77 {
   78 #ifdef  multimax
   79         struct  tsval   temp;
   80         temp.low_val = FRcounter;
   81         temp.high_val = 0;
   82 #else   multimax
   83 /*
   84         temp.low_val = 0;
   85         temp.high_val = ts_tick_count;
   86 */
   87         time_value_t temp;
   88         temp = time;
   89 #endif  multimax
   90 
   91         if (copyout((char *)&temp,
   92                     (char *)tsp,
   93                     sizeof(struct tsval)) != KERN_SUCCESS)
   94             return(KERN_INVALID_ADDRESS);
   95         return(KERN_SUCCESS);
   96 }
   97 
   98 /*
   99  *      Initialization procedure.
  100  */
  101 
  102 void timestamp_init()
  103 {
  104 #ifdef  multimax
  105 #else   multimax
  106         ts_tick_count = 0;
  107 #endif  multimax
  108 }

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