| 1 | /** @file
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| 2 | *
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| 3 | * VirtualBox 3D common tooling
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2011 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 | #ifndef ___VBox_VBoxVideo3D_h
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| 28 | #define ___VBox_VBoxVideo3D_h
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| 29 |
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| 30 | #include <iprt/cdefs.h>
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| 31 | #include <iprt/asm.h>
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| 32 | #ifndef VBoxTlsRefGetImpl
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| 33 | # ifdef VBoxTlsRefSetImpl
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| 34 | # error "VBoxTlsRefSetImpl is defined, unexpected!"
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| 35 | # endif
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| 36 | # include <iprt/thread.h>
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| 37 | # define VBoxTlsRefGetImpl(_tls) (RTTlsGet((RTTLS)(_tls)))
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| 38 | # define VBoxTlsRefSetImpl(_tls, _val) (RTTlsSet((RTTLS)(_tls), (_val)))
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| 39 | #else
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| 40 | # ifndef VBoxTlsRefSetImpl
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| 41 | # error "VBoxTlsRefSetImpl is NOT defined, unexpected!"
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| 42 | # endif
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| 43 | #endif
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| 44 |
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| 45 | #ifndef VBoxTlsRefAssertImpl
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| 46 | # define VBoxTlsRefAssertImpl(_a) do {} while (0)
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| 47 | #endif
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| 48 |
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| 49 | typedef DECLCALLBACK(void) FNVBOXTLSREFDTOR(void*);
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| 50 | typedef FNVBOXTLSREFDTOR *PFNVBOXTLSREFDTOR;
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| 51 |
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| 52 | typedef enum {
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| 53 | VBOXTLSREFDATA_STATE_UNDEFINED = 0,
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| 54 | VBOXTLSREFDATA_STATE_INITIALIZED,
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| 55 | VBOXTLSREFDATA_STATE_TOBE_DESTROYED,
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| 56 | VBOXTLSREFDATA_STATE_DESTROYING,
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| 57 | VBOXTLSREFDATA_STATE_32BIT_HACK = 0x7fffffff
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| 58 | } VBOXTLSREFDATA_STATE;
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| 59 |
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| 60 | #define VBOXTLSREFDATA \
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| 61 | volatile int32_t cTlsRefs; \
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| 62 | VBOXTLSREFDATA_STATE enmTlsRefState; \
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| 63 | PFNVBOXTLSREFDTOR pfnTlsRefDtor; \
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| 64 |
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| 65 | struct VBOXTLSREFDATA_DUMMY
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| 66 | {
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| 67 | VBOXTLSREFDATA
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| 68 | };
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| 69 |
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| 70 | #define VBOXTLSREFDATA_OFFSET(_t) RT_OFFSETOF(_t, cTlsRefs)
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| 71 | #define VBOXTLSREFDATA_SIZE() (sizeof (struct VBOXTLSREFDATA_DUMMY))
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| 72 | #define VBOXTLSREFDATA_COPY(_pDst, _pSrc) do { \
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| 73 | (_pDst)->cTlsRefs = (_pSrc)->cTlsRefs; \
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| 74 | (_pDst)->enmTlsRefState = (_pSrc)->enmTlsRefState; \
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| 75 | (_pDst)->pfnTlsRefDtor = (_pSrc)->pfnTlsRefDtor; \
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| 76 | } while (0)
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| 77 |
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| 78 | #define VBOXTLSREFDATA_EQUAL(_pDst, _pSrc) ( \
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| 79 | (_pDst)->cTlsRefs == (_pSrc)->cTlsRefs \
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| 80 | && (_pDst)->enmTlsRefState == (_pSrc)->enmTlsRefState \
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| 81 | && (_pDst)->pfnTlsRefDtor == (_pSrc)->pfnTlsRefDtor \
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| 82 | )
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| 83 |
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| 84 |
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| 85 | #define VBoxTlsRefInit(_p, _pfnDtor) do { \
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| 86 | (_p)->cTlsRefs = 1; \
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| 87 | (_p)->enmTlsRefState = VBOXTLSREFDATA_STATE_INITIALIZED; \
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| 88 | (_p)->pfnTlsRefDtor = (_pfnDtor); \
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| 89 | } while (0)
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| 90 |
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| 91 | #define VBoxTlsRefIsFunctional(_p) (!!((_p)->enmTlsRefState == VBOXTLSREFDATA_STATE_INITIALIZED))
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| 92 |
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| 93 | #define VBoxTlsRefAddRef(_p) do { \
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| 94 | int cRefs = ASMAtomicIncS32(&(_p)->cTlsRefs); \
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| 95 | VBoxTlsRefAssertImpl(cRefs > 1 || (_p)->enmTlsRefState == VBOXTLSREFDATA_STATE_DESTROYING); \
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| 96 | } while (0)
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| 97 |
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| 98 | #define VBoxTlsRefRelease(_p) do { \
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| 99 | int cRefs = ASMAtomicDecS32(&(_p)->cTlsRefs); \
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| 100 | VBoxTlsRefAssertImpl(cRefs >= 0); \
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| 101 | if (!cRefs && (_p)->enmTlsRefState != VBOXTLSREFDATA_STATE_DESTROYING /* <- avoid recursion if VBoxTlsRefAddRef/Release is called from dtor */) { \
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| 102 | (_p)->enmTlsRefState = VBOXTLSREFDATA_STATE_DESTROYING; \
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| 103 | (_p)->pfnTlsRefDtor((_p)); \
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| 104 | } \
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| 105 | } while (0)
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| 106 |
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| 107 | #define VBoxTlsRefMarkDestroy(_p) do { \
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| 108 | (_p)->enmTlsRefState = VBOXTLSREFDATA_STATE_TOBE_DESTROYED; \
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| 109 | } while (0)
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| 110 |
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| 111 | #define VBoxTlsRefGetCurrent(_t, _Tsd) ((_t*) VBoxTlsRefGetImpl((_Tsd)))
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| 112 |
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| 113 | #define VBoxTlsRefSetCurrent(_t, _Tsd, _p) do { \
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| 114 | _t * oldCur = VBoxTlsRefGetCurrent(_t, _Tsd); \
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| 115 | if (oldCur != (_p)) { \
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| 116 | VBoxTlsRefSetImpl((_Tsd), (_p)); \
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| 117 | if (oldCur) { \
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| 118 | VBoxTlsRefRelease(oldCur); \
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| 119 | } \
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| 120 | if ((_p)) { \
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| 121 | VBoxTlsRefAddRef((_t*)(_p)); \
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| 122 | } \
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| 123 | } \
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| 124 | } while (0)
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| 125 |
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| 126 | #endif /* #ifndef ___VBox_VBoxVideo3D_h */
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