Annotation of OSKit-Mach/kern/time_stamp.c, revision 1.1

1.1     ! root        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  [email protected]
        !            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: #include <mach/std_types.h>
        !            28: #include <sys/time.h>
        !            29: #include <kern/time_stamp.h>
        !            30: 
        !            31: /*
        !            32:  *     ts.c - kern_timestamp system call.
        !            33:  */
        !            34: #ifdef multimax
        !            35: #include <mmax/timer.h>
        !            36: #endif /* multimax */
        !            37: 
        !            38: 
        !            39: 
        !            40: kern_return_t
        !            41: kern_timestamp(tsp)
        !            42: struct tsval   *tsp;
        !            43: {
        !            44: #ifdef multimax
        !            45:        struct  tsval   temp;
        !            46:        temp.low_val = FRcounter;
        !            47:        temp.high_val = 0;
        !            48: #else  /* multimax */
        !            49: /*
        !            50:        temp.low_val = 0;
        !            51:        temp.high_val = ts_tick_count;
        !            52: */
        !            53:        time_value_t temp;
        !            54:        temp = time;
        !            55: #endif /* multimax */
        !            56: 
        !            57:        if (copyout((char *)&temp,
        !            58:                    (char *)tsp,
        !            59:                    sizeof(struct tsval)) != KERN_SUCCESS)
        !            60:            return(KERN_INVALID_ADDRESS);
        !            61:        return(KERN_SUCCESS);
        !            62: }
        !            63: 
        !            64: /*
        !            65:  *     Initialization procedure.
        !            66:  */
        !            67: 
        !            68: void timestamp_init()
        !            69: {
        !            70: #ifdef multimax
        !            71: #else  /* multimax */
        !            72:        ts_tick_count = 0;
        !            73: #endif /* multimax */
        !            74: }

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