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w16gc.c
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00001 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is the Netscape Portable Runtime (NSPR).
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998-2000
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either the GNU General Public License Version 2 or later (the "GPL"), or
00026  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00027  * in which case the provisions of the GPL or the LGPL are applicable instead
00028  * of those above. If you wish to allow use of your version of this file only
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00036  * ***** END LICENSE BLOCK ***** */
00037 
00038 #include "primpl.h"
00039 #include <sys/timeb.h>
00040 
00041 PRWord *
00042 _MD_HomeGCRegisters(PRThread *t, int isCurrent, int *np) 
00043 {
00044     if (isCurrent) 
00045     {
00046         _MD_SAVE_CONTEXT(t);
00047     }
00048     /*
00049     ** In Win16 because the premption is "cooperative" it can never be the 
00050     ** case that a register holds the sole reference to an object.  It
00051     ** will always have been pushed onto the stack before the thread
00052     ** switch...  So don't bother to scan the registers...
00053     */
00054     *np = 0;
00055 
00056     return (PRWord *) CONTEXT(t);
00057 }
00058 
00059 #if 0
00060 #ifndef SPORT_MODEL
00061 
00062 #define MAX_SEGMENT_SIZE (65536l - 4096l)
00063 
00064 /************************************************************************/
00065 /*
00066 ** Machine dependent GC Heap management routines:
00067 **    _MD_GrowGCHeap
00068 */
00069 /************************************************************************/
00070 
00071 extern void *
00072 _MD_GrowGCHeap(uint32 *sizep)
00073 {
00074     void *addr;
00075 
00076     if( *sizep > MAX_SEGMENT_SIZE ) {
00077         *sizep = MAX_SEGMENT_SIZE;
00078     }
00079 
00080     addr = malloc((size_t)*sizep);
00081     return addr;
00082 }
00083 
00084 #endif /* SPORT_MODEL */
00085 #endif /* 0 */
00086