Category : Alternate Operating Systems - Quarterdeck DesqView, CP/M, etc
Archive   : PCCAPP.ZIP
Filename : CPUCOLLE.H

/*
* This file is part of the Choices Operating System
* Developed by: The TAPESTRY Parallel Computing Laboratory
* University of Illinois at Urbana-Champaign
* Department of Computer Science
* 1304 W. Springfield Ave.
* Urbana, IL 61801
*
* Copyright (c) 1987, 1988, 1989, 1990, 1991, 1992
* The University of Illinois Board of Trustees.
* All Rights Reserved.
*
* Author: Vincent F. Russo ([email protected])
* Project Manager and Principal Investigator: Roy Campbell ([email protected])
*
* Funded by: NSF TAPESTRY Grant No. 1-5-30035, NASA ICLASS Grant
* No. 1-5-25469 and No. NSG1471 and AT&T Metronet Grant No. 1-5-37411.
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for educational, research, and non-profit purposes
* is hereby granted provided that the above copyright notice, the
* original authors names, and this permission notice appear in all such
* copies and supporting documentation; that no charge be made for such
* copies; and that the name of the University of Illinois not be used
* in advertising or publicity pertaining to distribution of the
* software without specific prior written permission. Any entity
* desiring permission to incorporate this software into commercial
* products should contact the Computing Research Laboratory, Department
* of Computer Science, University of Illinois, 1304 W. Springfield
* Avenue, Urbana, IL 61801. The University of Illinois makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*/
/*
* CPUCollection.h: class to handle a collection of CPUs. This is used mostly
* to get a pointer to the CPU object representing a
* processor (especially on a multiprocessor).
*
*/

#ifndef CPUCollection_h
#define CPUCollection_h
#ifdef __GNUG__
#pragma once
#pragma interface
#endif

#include "Assert.h"
#include "CPU_CONFIGURATION.h"
#include "PROCESSOR_ID.h"

class CPU; // forward reference to prevent circular dependencies.

/*
* Dont make it a subclass of object because it would make looking up the
* CPU pointers take an extra dereference to bypass the virtual function
* table. The way it is now, the array is the first thing in the class so
* a pointer to the class is also a pointer to the array.
*/
class CPUCollection {
protected:
CPU * cpus[ MAXPROCESSORS ]; /* for now some assembler code knows */
/* the offset to this. So leave it as */
/* the first thing in the class */

public:
CPUCollection();

void add( unsigned long who, CPU * cpuObj );
void remove( unsigned long who );

CPU * me();
CPU * cpu( unsigned long uniqueId );
};

inline void
CPUCollection::add( unsigned long who, CPU * cpuObj )
{
cpus[ who ] = cpuObj;
}

inline void
CPUCollection::remove( unsigned long who )
{
cpus[ who ] = 0;
}

inline CPU *
CPUCollection::me()
{
return( cpus[ PerMemoryProcessorID() ] );
}

inline CPU *
CPUCollection::cpu( unsigned long uniqueId )
{
Assert( uniqueId < MAXPROCESSORS );
return( cpus[ uniqueId ] );
}

extern CPUCollection OnlineCPUs;

/*
* For shared memory multiprocessor use a CPUCollection for thisCPU().
*/
inline CPU *
thisCPU()
{
return( OnlineCPUs.me() );
}

#endif /* CPUCollection_h */
/*
* This file is part of the Choices Operating System
* Developed by: The TAPESTRY Parallel Computing Laboratory
* University of Illinois at Urbana-Champaign
* Department of Computer Science
* 1304 W. Springfield Ave.
* Urbana, IL 61801
*
* Copyright (c) 1987, 1988, 1989, 1990, 1991, 1992
* The University of Illinois Board of Trustees.
* All Rights Reserved.
*
* Author: Systems Research Group ([email protected])
* Project Manager and Principal Investigator: Roy Campbell ([email protected])
*
* Funded by: NSF TAPESTRY Grant No. 1-5-30035, NASA ICLASS Grant
* No. 1-5-25469 and No. NSG1471 and AT&T Metronet Grant No. 1-5-37411.
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for educational, research, and non-profit purposes
* is hereby granted provided that the above copyright notice, the
* original authors names, and this permission notice appear in all such
* copies and supporting documentation; that no charge be made for such
* copies; and that the name of the University of Illinois not be used
* in advertising or publicity pertaining to distribution of the
* software without specific prior written permission. Any entity
* desiring permission to incorporate this software into commercial
* products should contact the Computing Research Laboratory, Department
* of Computer Science, University of Illinois, 1304 W. Springfield
* Avenue, Urbana, IL 61801. The University of Illinois makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*/
/* This file was generated by Proxify++ version 0.1 */

#ifndef CPUCollection_h
#define CPUCollection_h
#ifdef __GNUG__
#pragma once
#pragma interface
#endif
#include "Assert.h"
#include "CPU_CONFIGURATION.h"
#include "PROCESSOR_ID.h"
class CPU;
class CPUCollection;
extern CPUCollection OnlineCPUs;
#endif CPUCollection_h