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113 lines
3.7 KiB
C
113 lines
3.7 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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/*******************************************************************************
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S P O R T M O D E L
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_____
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____/_____\____
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/__o____o____o__\ __
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\_______________/ (@@)/
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/\_____|_____/\ x~[]~
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~~~~~~~~~~~/~~~~~~~|~~~~~~~\~~~~~~~~/\~~~~~~~~~
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Advanced Technology Garbage Collector
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Copyright (c) 1997 Netscape Communications, Inc. All rights reserved.
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Recovered by: Warren Harris
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*******************************************************************************/
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#ifndef __SMSTACK__
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#define __SMSTACK__
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#include "smobj.h"
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SM_BEGIN_EXTERN_C
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/******************************************************************************/
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typedef struct SMStackSegmentHeader {
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struct SMStackSegment* prev;
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struct SMStackSegment* next;
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} SMStackSegmentHeader;
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typedef struct SMStackSegment {
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SMStackSegmentHeader header;
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SMObject* element;
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/* multiple elements follow */
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} SMStackSegment;
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#define SM_STACK_SEG_PAGES 1
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typedef struct SMStack {
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SMStackSegment* segment;
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SMObject** top;
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SMObject** min;
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SMObject** max;
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PRUword overflowCount;
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} SMStack;
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#define SM_INIT_STACK(stack) \
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((stack)->segment = NULL, \
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(stack)->top = NULL, \
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(stack)->min = NULL, \
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(stack)->max = NULL, \
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(stack)->overflowCount = 0) \
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#define SM_STACK_POP0(stack) \
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(*(--(stack)->top)) \
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#define SM_STACK_PUSH0(stack, obj) \
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((void)(*((stack)->top)++ = (obj))) \
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#define SM_STACK_POP(stack) \
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(((stack)->top > (stack)->min) \
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? SM_STACK_POP0(stack) \
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: SM_STACK_UNDERFLOW(stack)) \
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#define SM_STACK_PUSH(stack, obj) \
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(((stack)->top < (stack)->max) \
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? (SM_STACK_PUSH0(stack, obj), PR_TRUE) \
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: SM_STACK_OVERFLOW(stack, obj)) \
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#define SM_STACK_UNDERFLOW(stack) sm_StackUnderflow(stack)
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#define SM_STACK_OVERFLOW(stack, obj) sm_StackOverflow(stack, obj)
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#define SM_STACK_IS_EMPTY(stack) \
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((stack)->segment == NULL \
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|| ((stack)->segment->header.prev == NULL \
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&& (stack)->top == (stack)->min)) \
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extern SMObject*
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sm_StackUnderflow(SMStack* stack);
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extern PRBool
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sm_StackOverflow(SMStack* stack, SMObject* obj);
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extern PRUword
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sm_StackSize(SMStack* stack);
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extern void
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sm_DestroyStack(SMStack* stack);
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/******************************************************************************/
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SM_END_EXTERN_C
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#endif /* __SMSTACK__ */
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/******************************************************************************/
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