94 lines
3.1 KiB
C
94 lines
3.1 KiB
C
/*
|
|
* CDE - Common Desktop Environment
|
|
*
|
|
* Copyright (c) 1993-2012, The Open Group. All rights reserved.
|
|
*
|
|
* These libraries and programs are free software; you can
|
|
* redistribute them and/or modify them under the terms of the GNU
|
|
* Lesser General Public License as published by the Free Software
|
|
* Foundation; either version 2 of the License, or (at your option)
|
|
* any later version.
|
|
*
|
|
* These libraries and programs are distributed in the hope that
|
|
* they will be useful, but WITHOUT ANY WARRANTY; without even the
|
|
* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
|
|
* PURPOSE. See the GNU Lesser General Public License for more
|
|
* details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with these libraries and programs; if not, write
|
|
* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
|
|
* Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
//%% (c) Copyright 1993, 1994 Hewlett-Packard Company
|
|
//%% (c) Copyright 1993, 1994 International Business Machines Corp.
|
|
//%% (c) Copyright 1993, 1994 Sun Microsystems, Inc.
|
|
//%% (c) Copyright 1993, 1994 Novell, Inc.
|
|
//%% $XConsortium: tt_object.C /main/3 1995/10/23 10:42:24 rswiston $
|
|
/* @(#)tt_object.C 1.13 93/07/30
|
|
*
|
|
* tt_object.cc
|
|
*
|
|
* Copyright (c) 1991, 1992 by Sun Microsystems, Inc.
|
|
*
|
|
* This is the tt_object class.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include "util/tt_object.h"
|
|
#include "util/tt_port.h"
|
|
|
|
static _Tt_object_ptr *_tt_object_nil = 0;
|
|
|
|
_Tt_object::
|
|
~_Tt_object()
|
|
{
|
|
}
|
|
|
|
// Occasionally a routine needs to return a reference to a _ptr class instance
|
|
// with a null pointer. We have just one of those as a static member of
|
|
// _Tt_object. Since we can\'t use any static initialized class instances,
|
|
// we do the usual trick of making it a pointer and allocating the
|
|
// real instance with new on the first reference.
|
|
|
|
_Tt_object_ptr &_Tt_object::
|
|
null_ptr()
|
|
{
|
|
if (!_tt_object_nil) {
|
|
_tt_object_nil
|
|
= new _Tt_object_ptr((_Tt_object *)0);
|
|
}
|
|
return *_tt_object_nil;
|
|
}
|
|
|
|
|
|
// Not every class that inherits from _Tt_object provides an xdr method,
|
|
// since not every class needs one. However, the ptr classes always
|
|
// declare an xdr method which refers to the pointed-to classes\' xdr
|
|
// method. For classes that don\'t declare their own xdr method, this
|
|
// generates a reference to _Tt_object::xdr, so we supply the following
|
|
// definition to satisfy them. If this ever gets called it is a gross
|
|
// design error (or a sign that an xdr method needs to be provided...)
|
|
bool_t _Tt_object::
|
|
xdr(XDR * /* xdrs */)
|
|
{
|
|
_tt_syslog( 0, LOG_ERR, "_Tt_object::xdr()");
|
|
abort();
|
|
return 0;
|
|
}
|
|
|
|
// We don\'t want to make _refcount_ public, but there are occasional
|
|
// uses in debugging to just check that the refcount on an object
|
|
// is reasonable: greater than zero but not ridiculously large.
|
|
// This method checks the refcount and returns -1 if the refcount
|
|
// is too small (<=0), +1 if the refcount is too large (greater than
|
|
// the parameter supplied) or 0 if the refcount is just right.
|
|
int _Tt_object::
|
|
verify_refcount(int maxref)
|
|
{
|
|
if (_refcount_<=0) return -1;
|
|
if (_refcount_>maxref) return +1;
|
|
return 0;
|
|
}
|
|
|