*   Copyright (c) 2002 by Michael J. Roberts.  All Rights Reserved.

 *   

 *   Please see the accompanying license file, LICENSE.TXT, for information

 *   on using and copying this software.  

 */

/*

Name

  vmprofty.h - basic type definitions for the profiler

Function

  This defines some basic types for the profiler.  We use a separate header

  to allow finer-grained inclusions.

Notes

Modified

  08/03/02 MJRoberts  - Creation

*/

#ifndef VMPROFTY_H

#define VMPROFTY_H

/* ------------------------------------------------------------------------ */

/*

 *   Profiler time record.  We use a 64-bit value for the time; this gives

 *   the time as a delta from some arbitrary zero point, defined by the OS,

 *   as a 64-bit quantity in units defined by the OS.

 *   

 *   We use a 64-bit value to allow for OS-provided timers with very high

 *   precision.  The OS doesn't necessarily have to use the full 64 bits; if

 *   only 32-bit timer values are available, the OS code can simply set the

 *   high-order part to zero.

 */

struct vm_prof_time

{

    /* the high-order and low-order 32 bits of the time value */

    unsigned long hi;

    unsigned long lo;

};