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/** @file
*
* VBox Host Guest Shared Memory Interface (HGSMI).
* Host part helpers.
*/
/*
* Copyright (C) 2006-2010 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
#ifndef __HGSMIHostHlp_h__
#define __HGSMIHostHlp_h__
#include <iprt/assert.h>
#include <iprt/types.h>
typedef struct _HGSMILISTENTRY
{
struct _HGSMILISTENTRY *pNext;
} HGSMILISTENTRY;
typedef struct _HGSMILIST
{
HGSMILISTENTRY *pHead;
HGSMILISTENTRY *pTail;
} HGSMILIST;
void hgsmiListAppend (HGSMILIST *pList, HGSMILISTENTRY *pEntry);
DECLINLINE(void) hgsmiListPrepend (HGSMILIST *pList, HGSMILISTENTRY *pEntry)
{
HGSMILISTENTRY * pHead = pList->pHead;
pList->pHead = pEntry;
pEntry->pNext = pHead;
if (!pHead)
pList->pTail = pEntry;
}
void hgsmiListRemove (HGSMILIST *pList, HGSMILISTENTRY *pEntry, HGSMILISTENTRY *pPrev);
DECLINLINE(HGSMILISTENTRY*) hgsmiListRemoveHead (HGSMILIST *pList)
{
HGSMILISTENTRY *pHead = pList->pHead;
if (pHead)
hgsmiListRemove (pList, pHead, NULL);
return pHead;
}
DECLINLINE(bool) hgsmiListIsEmpty (HGSMILIST *pList)
{
return !pList->pHead;
}
DECLINLINE(void) hgsmiListInit (HGSMILIST *pList)
{
pList->pHead = NULL;
pList->pTail = NULL;
}
HGSMILISTENTRY * hgsmiListRemoveAll (HGSMILIST *pList, HGSMILISTENTRY ** ppTail /* optional */);
DECLINLINE(void) hgsmiListAppendAll (HGSMILIST *pList, HGSMILISTENTRY *pHead, HGSMILISTENTRY *pTail)
{
if(hgsmiListIsEmpty (pList))
{
pList->pHead = pHead;
pList->pTail = pTail;
}
else
{
pList->pTail->pNext = pHead;
pList->pTail = pTail;
}
}
DECLINLINE(void) hgsmiListPrependAll (HGSMILIST *pList, HGSMILISTENTRY *pHead, HGSMILISTENTRY *pTail)
{
HGSMILISTENTRY *pOldHead = pList->pHead;
if(!pOldHead)
{
pList->pHead = pHead;
pList->pTail = pTail;
}
else
{
pList->pHead = pHead;
pTail->pNext = pOldHead;
}
}
DECLINLINE(void) hgsmiListCat (HGSMILIST *pList, HGSMILIST *pList2)
{
hgsmiListAppendAll (pList, pList2->pHead, pList2->pTail);
hgsmiListInit (pList2);
}
DECLINLINE(void) hgsmiListPrepCat (HGSMILIST *pList, HGSMILIST *pList2)
{
hgsmiListPrependAll (pList, pList2->pHead, pList2->pTail);
hgsmiListInit (pList2);
}
#endif /* !__HGSMIHostHlp_h__*/
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