Category : Alternate Operating Systems - Quarterdeck DesqView, CP/M, etc
Archive   : PCCAPP.ZIP
Filename : NEWANDDE.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
* The University of Illinois Board of Trustees.
* All Rights Reserved.
* CONFIDENTIAL INFORMATION. Distribution restricted under license agreement.
*
* Author: David W. Dykstra ([email protected])
* Contributing Author: Lee Lup Yuen ([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.
*/
/*
* NewAndDelete.h - definition of new with placement; analagous to
* NewAndDelete.cc which defines the normal new and delete operators
*/


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

// These operators are used like this:
// In AT&T C++: Widget *w = new (0x1234) Widget;
// In g++: Widget *w = new {0x1234} Widget;
// Unlike "new" statements using the regular syntax (ie. without (...) or
// {...}), the statements above DO NOT allocate any space from the heap
// for the new Widget. Instead, the above statements assume that memory
// is already available at address 0x1234 for the new Widget. The net
// effect of the statements is to call the Widget constructor with the
// "this" pointer set to 0x1234. w will be set to 0x1234 too. The examples
// above will also work if 0x1234 is replaced by a variable.
//
// Warning: As of 1 Feb 92, DJGPP (DOS g++) still refused to compile
// statements with the above syntax. I wrote some assembly code to
// call the constructor directly instead of using the special syntax. - Lup

#ifdef CFRONT

typedef unsigned int size_t;

static inline void * operator
new( size_t, void * where )
{
return( where );
}

#else

static inline void * operator
new( int, void * where )
{
return( where );
}

#endif

#endif /* NewAndDelete_h */