| 1 | /** @file
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| 2 | * PDM - Pluggable Device Manager, Read/Write Critical Section.
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| 3 | */
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| 4 |
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| 5 | /*
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| 6 | * Copyright (C) 2006-2020 Oracle Corporation
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| 7 | *
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| 8 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 9 | * available from http://www.virtualbox.org. This file is free software;
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| 10 | * you can redistribute it and/or modify it under the terms of the GNU
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| 11 | * General Public License (GPL) as published by the Free Software
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| 12 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 13 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 14 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 15 | *
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| 16 | * The contents of this file may alternatively be used under the terms
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| 17 | * of the Common Development and Distribution License Version 1.0
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| 18 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 19 | * VirtualBox OSE distribution, in which case the provisions of the
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| 20 | * CDDL are applicable instead of those of the GPL.
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| 21 | *
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| 22 | * You may elect to license modified versions of this file under the
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| 23 | * terms and conditions of either the GPL or the CDDL or both.
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| 24 | */
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| 25 |
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| 26 | #ifndef VBOX_INCLUDED_vmm_pdmcritsectrw_h
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| 27 | #define VBOX_INCLUDED_vmm_pdmcritsectrw_h
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| 28 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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| 29 | # pragma once
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| 30 | #endif
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| 31 |
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| 32 | #include <VBox/types.h>
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| 33 |
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| 34 |
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| 35 | RT_C_DECLS_BEGIN
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| 36 |
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| 37 | /** @defgroup grp_pdm_critsectrw The PDM Read/Write Critical Section API
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| 38 | * @ingroup grp_pdm
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| 39 | * @{
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| 40 | */
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| 41 |
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| 42 | /**
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| 43 | * A PDM read/write critical section.
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| 44 | * Initialize using PDMDRVHLP::pfnCritSectRwInit().
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| 45 | */
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| 46 | typedef union PDMCRITSECTRW
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| 47 | {
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| 48 | /** Padding. */
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| 49 | uint8_t padding[HC_ARCH_BITS == 32 ? 0xc0 : 0x100];
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| 50 | #ifdef PDMCRITSECTRWINT_DECLARED
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| 51 | /** The internal structure (not normally visible). */
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| 52 | struct PDMCRITSECTRWINT s;
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| 53 | #endif
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| 54 | } PDMCRITSECTRW;
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| 55 |
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| 56 | VMMR3DECL(int) PDMR3CritSectRwInit(PVM pVM, PPDMCRITSECTRW pCritSect, RT_SRC_POS_DECL,
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| 57 | const char *pszNameFmt, ...) RT_IPRT_FORMAT_ATTR(6, 7);
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| 58 | VMMR3DECL(int) PDMR3CritSectRwDelete(PVM pVM, PPDMCRITSECTRW pCritSect);
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| 59 | VMMR3DECL(const char *) PDMR3CritSectRwName(PCPDMCRITSECTRW pCritSect);
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| 60 | VMMR3DECL(int) PDMR3CritSectRwEnterSharedEx(PVM pVM, PPDMCRITSECTRW pThis, bool fCallRing3);
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| 61 | VMMR3DECL(int) PDMR3CritSectRwEnterExclEx(PVM pVM, PPDMCRITSECTRW pThis, bool fCallRing3);
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| 62 |
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| 63 | VMMDECL(int) PDMCritSectRwEnterShared(PVMCC pVM, PPDMCRITSECTRW pCritSect, int rcBusy);
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| 64 | VMMDECL(int) PDMCritSectRwEnterSharedDebug(PVMCC pVM, PPDMCRITSECTRW pCritSect, int rcBusy, RTHCUINTPTR uId, RT_SRC_POS_DECL);
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| 65 | VMMDECL(int) PDMCritSectRwTryEnterShared(PVMCC pVM, PPDMCRITSECTRW pCritSect);
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| 66 | VMMDECL(int) PDMCritSectRwTryEnterSharedDebug(PVMCC pVM, PPDMCRITSECTRW pCritSect, RTHCUINTPTR uId, RT_SRC_POS_DECL);
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| 67 | VMMDECL(int) PDMCritSectRwLeaveShared(PVMCC pVM, PPDMCRITSECTRW pCritSect);
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| 68 | VMMDECL(int) PDMCritSectRwEnterExcl(PVMCC pVM, PPDMCRITSECTRW pCritSect, int rcBusy);
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| 69 | VMMDECL(int) PDMCritSectRwEnterExclDebug(PVMCC pVM, PPDMCRITSECTRW pCritSect, int rcBusy, RTHCUINTPTR uId, RT_SRC_POS_DECL);
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| 70 | VMMDECL(int) PDMCritSectRwTryEnterExcl(PVMCC pVM, PPDMCRITSECTRW pCritSect);
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| 71 | VMMDECL(int) PDMCritSectRwTryEnterExclDebug(PVMCC pVM, PPDMCRITSECTRW pCritSect, RTHCUINTPTR uId, RT_SRC_POS_DECL);
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| 72 | VMMDECL(int) PDMCritSectRwLeaveExcl(PVMCC pVM, PPDMCRITSECTRW pCritSect);
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| 73 |
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| 74 | VMMDECL(bool) PDMCritSectRwIsWriteOwner(PVMCC pVM, PPDMCRITSECTRW pCritSect);
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| 75 | VMMDECL(bool) PDMCritSectRwIsReadOwner(PVMCC pVM, PPDMCRITSECTRW pCritSect, bool fWannaHear);
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| 76 | VMMDECL(uint32_t) PDMCritSectRwGetWriteRecursion(PPDMCRITSECTRW pCritSect);
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| 77 | VMMDECL(uint32_t) PDMCritSectRwGetWriterReadRecursion(PPDMCRITSECTRW pCritSect);
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| 78 | VMMDECL(uint32_t) PDMCritSectRwGetReadCount(PPDMCRITSECTRW pCritSect);
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| 79 | VMMDECL(bool) PDMCritSectRwIsInitialized(PCPDMCRITSECTRW pCritSect);
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| 80 |
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| 81 | /* Lock strict build: Remap the three enter calls to the debug versions. */
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| 82 | #ifdef VBOX_STRICT
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| 83 | # ifdef IPRT_INCLUDED_asm_h
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| 84 | # define PDMCritSectRwEnterExcl(a_pVM, pCritSect, rcBusy) PDMCritSectRwEnterExclDebug((a_pVM), pCritSect, rcBusy, (uintptr_t)ASMReturnAddress(), RT_SRC_POS)
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| 85 | # define PDMCritSectRwTryEnterExcl(a_pVM, pCritSect) PDMCritSectRwTryEnterExclDebug((a_pVM), pCritSect, (uintptr_t)ASMReturnAddress(), RT_SRC_POS)
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| 86 | # define PDMCritSectRwEnterShared(a_pVM, pCritSect, rcBusy) PDMCritSectRwEnterSharedDebug((a_pVM), pCritSect, rcBusy, (uintptr_t)ASMReturnAddress(), RT_SRC_POS)
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| 87 | # define PDMCritSectRwTryEnterShared(a_pVM, pCritSect) PDMCritSectRwTryEnterSharedDebug((a_pVM), pCritSect, (uintptr_t)ASMReturnAddress(), RT_SRC_POS)
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| 88 | # else
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| 89 | # define PDMCritSectRwEnterExcl(a_pVM, pCritSect, rcBusy) PDMCritSectRwEnterExclDebug((a_pVM), pCritSect, rcBusy, 0, RT_SRC_POS)
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| 90 | # define PDMCritSectRwTryEnterExcl(a_pVM, pCritSect) PDMCritSectRwTryEnterExclDebug((a_pVM), pCritSect, 0, RT_SRC_POS)
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| 91 | # define PDMCritSectRwEnterShared(a_pVM, pCritSect, rcBusy) PDMCritSectRwEnterSharedDebug((a_pVM), pCritSect, rcBusy, 0, RT_SRC_POS)
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| 92 | # define PDMCritSectRwTryEnterShared(a_pVM, pCritSect) PDMCritSectRwTryEnterSharedDebug((a_pVM), pCritSect, 0, RT_SRC_POS)
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| 93 | # endif
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| 94 | #endif
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| 95 |
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| 96 | /** @} */
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| 97 |
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| 98 | RT_C_DECLS_END
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| 99 |
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| 100 | #endif /* !VBOX_INCLUDED_vmm_pdmcritsectrw_h */
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| 101 |
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