| 1 | /** @file
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| 2 | *
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| 3 | * VBox Host Guest Shared Memory Interface (HGSMI).
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| 4 | * Host part helpers.
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| 5 | */
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| 6 |
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| 7 | /*
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| 8 | * Copyright (C) 2006-2010 Oracle Corporation
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| 9 | *
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| 10 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 11 | * available from http://www.virtualbox.org. This file is free software;
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| 12 | * you can redistribute it and/or modify it under the terms of the GNU
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| 13 | * General Public License (GPL) as published by the Free Software
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| 14 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 15 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 16 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 17 | */
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| 18 |
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| 19 |
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| 20 | #ifndef __HGSMIHostHlp_h__
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| 21 | #define __HGSMIHostHlp_h__
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| 22 |
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| 23 | #include <iprt/assert.h>
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| 24 | #include <iprt/types.h>
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| 25 |
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| 26 | typedef struct _HGSMILISTENTRY
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| 27 | {
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| 28 | struct _HGSMILISTENTRY *pNext;
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| 29 | } HGSMILISTENTRY;
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| 30 |
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| 31 | typedef struct _HGSMILIST
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| 32 | {
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| 33 | HGSMILISTENTRY *pHead;
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| 34 | HGSMILISTENTRY *pTail;
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| 35 | } HGSMILIST;
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| 36 |
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| 37 | void hgsmiListAppend (HGSMILIST *pList, HGSMILISTENTRY *pEntry);
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| 38 | DECLINLINE(void) hgsmiListPrepend (HGSMILIST *pList, HGSMILISTENTRY *pEntry)
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| 39 | {
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| 40 | HGSMILISTENTRY * pHead = pList->pHead;
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| 41 | pList->pHead = pEntry;
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| 42 | pEntry->pNext = pHead;
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| 43 | if (!pHead)
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| 44 | pList->pTail = pEntry;
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| 45 | }
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| 46 |
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| 47 | void hgsmiListRemove (HGSMILIST *pList, HGSMILISTENTRY *pEntry, HGSMILISTENTRY *pPrev);
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| 48 |
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| 49 | DECLINLINE(HGSMILISTENTRY*) hgsmiListRemoveHead (HGSMILIST *pList)
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| 50 | {
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| 51 | HGSMILISTENTRY *pHead = pList->pHead;
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| 52 | if (pHead)
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| 53 | hgsmiListRemove (pList, pHead, NULL);
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| 54 | return pHead;
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| 55 | }
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| 56 |
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| 57 | DECLINLINE(bool) hgsmiListIsEmpty (HGSMILIST *pList)
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| 58 | {
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| 59 | return !pList->pHead;
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| 60 | }
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| 61 |
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| 62 | DECLINLINE(void) hgsmiListInit (HGSMILIST *pList)
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| 63 | {
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| 64 | pList->pHead = NULL;
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| 65 | pList->pTail = NULL;
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| 66 | }
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| 67 |
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| 68 | HGSMILISTENTRY * hgsmiListRemoveAll (HGSMILIST *pList, HGSMILISTENTRY ** ppTail /* optional */);
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| 69 |
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| 70 | DECLINLINE(void) hgsmiListAppendAll (HGSMILIST *pList, HGSMILISTENTRY *pHead, HGSMILISTENTRY *pTail)
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| 71 | {
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| 72 | if(hgsmiListIsEmpty (pList))
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| 73 | {
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| 74 | pList->pHead = pHead;
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| 75 | pList->pTail = pTail;
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| 76 | }
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| 77 | else
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| 78 | {
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| 79 | pList->pTail->pNext = pHead;
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| 80 | pList->pTail = pTail;
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| 81 | }
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| 82 | }
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| 83 |
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| 84 | DECLINLINE(void) hgsmiListPrependAll (HGSMILIST *pList, HGSMILISTENTRY *pHead, HGSMILISTENTRY *pTail)
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| 85 | {
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| 86 | HGSMILISTENTRY *pOldHead = pList->pHead;
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| 87 | if(!pOldHead)
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| 88 | {
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| 89 | pList->pHead = pHead;
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| 90 | pList->pTail = pTail;
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| 91 | }
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| 92 | else
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| 93 | {
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| 94 | pList->pHead = pHead;
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| 95 | pTail->pNext = pOldHead;
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| 96 | }
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| 97 | }
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| 98 |
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| 99 | DECLINLINE(void) hgsmiListCat (HGSMILIST *pList, HGSMILIST *pList2)
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| 100 | {
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| 101 | hgsmiListAppendAll (pList, pList2->pHead, pList2->pTail);
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| 102 | hgsmiListInit (pList2);
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| 103 | }
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| 104 |
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| 105 | DECLINLINE(void) hgsmiListPrepCat (HGSMILIST *pList, HGSMILIST *pList2)
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| 106 | {
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| 107 | hgsmiListPrependAll (pList, pList2->pHead, pList2->pTail);
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| 108 | hgsmiListInit (pList2);
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| 109 | }
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| 110 |
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| 111 |
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| 112 | #endif /* !__HGSMIHostHlp_h__*/
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