w16mem.c

Netscape NSPR库源码

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
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 * 
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 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 * 
 * The Original Code is the Netscape Portable Runtime (NSPR).
 * 
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are 
 * Copyright (C) 1998-2000 Netscape Communications Corporation.  All
 * Rights Reserved.
 * 
 * Contributor(s):
 * 
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 * terms of the GNU General Public License Version 2 or later (the
 * "GPL"), in which case the provisions of the GPL are applicable 
 * instead of those above.  If you wish to allow use of your 
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/*******************************************************************
** w16mem.c -- Implement memory segment functions.
**
** 
********************************************************************
*/
#include "primpl.h"


/*
**	Allocate a new memory segment.
**	
**	Return the segment's access rights and size.  
*/
PRStatus _MD_AllocSegment(PRSegment *seg, PRUint32 size, void *vaddr)
{
	PR_ASSERT(seg != 0);
	PR_ASSERT(size != 0);
	PR_ASSERT(vaddr == 0);

	/*	
	** Take the actual memory for the segment out of our Figment heap.
	*/

	seg->vaddr = (char *)malloc(size);

	if (seg->vaddr == NULL) {
		return PR_FAILURE;
	}

	seg->size = size;	

	return PR_SUCCESS;
} /* --- end _MD_AllocSegment() --- */


/*
**	Free previously allocated memory segment.
*/
void _MD_FreeSegment(PRSegment *seg)
{
	PR_ASSERT((seg->flags & _PR_SEG_VM) == 0);

	if (seg->vaddr != NULL)
		free( seg->vaddr );
    return;
} /* --- end _MD_FreeSegment() --- */