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/** @file
* PDM - Pluggable Device Manager, Read/Write Critical Section.
*/
/*
* Copyright (C) 2006-2013 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.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
#ifndef ___VBox_vmm_pdmcritsectrw_h
#define ___VBox_vmm_pdmcritsectrw_h
#include <VBox/types.h>
RT_C_DECLS_BEGIN
/** @defgroup grp_pdm_critsectrw The PDM Read/Write Critical Section API
* @ingroup grp_pdm
* @{
*/
/**
* A PDM read/write critical section.
* Initialize using PDMDRVHLP::pfnCritSectRwInit().
*/
typedef union PDMCRITSECTRW
{
/** Padding. */
uint8_t padding[HC_ARCH_BITS == 32 ? 0xc0 : 0x100];
#ifdef PDMCRITSECTRWINT_DECLARED
/** The internal structure (not normally visible). */
struct PDMCRITSECTRWINT s;
#endif
} PDMCRITSECTRW;
VMMR3DECL(int) PDMR3CritSectRwInit(PVM pVM, PPDMCRITSECTRW pCritSect, RT_SRC_POS_DECL, const char *pszNameFmt, ...);
VMMR3DECL(int) PDMR3CritSectRwDelete(PPDMCRITSECTRW pCritSect);
VMMR3DECL(const char *) PDMR3CritSectRwName(PCPDMCRITSECTRW pCritSect);
VMMR3DECL(int) PDMR3CritSectRwEnterSharedEx(PPDMCRITSECTRW pThis, bool fCallRing3);
VMMR3DECL(int) PDMR3CritSectRwEnterExclEx(PPDMCRITSECTRW pThis, bool fCallRing3);
VMMDECL(int) PDMCritSectRwEnterShared(PPDMCRITSECTRW pCritSect, int rcBusy);
VMMDECL(int) PDMCritSectRwEnterSharedDebug(PPDMCRITSECTRW pCritSect, int rcBusy, RTHCUINTPTR uId, RT_SRC_POS_DECL);
VMMDECL(int) PDMCritSectRwTryEnterShared(PPDMCRITSECTRW pCritSect);
VMMDECL(int) PDMCritSectRwTryEnterSharedDebug(PPDMCRITSECTRW pCritSect, RTHCUINTPTR uId, RT_SRC_POS_DECL);
VMMDECL(int) PDMCritSectRwLeaveShared(PPDMCRITSECTRW pCritSect);
VMMDECL(int) PDMCritSectRwEnterExcl(PPDMCRITSECTRW pCritSect, int rcBusy);
VMMDECL(int) PDMCritSectRwEnterExclDebug(PPDMCRITSECTRW pCritSect, int rcBusy, RTHCUINTPTR uId, RT_SRC_POS_DECL);
VMMDECL(int) PDMCritSectRwTryEnterExcl(PPDMCRITSECTRW pCritSect);
VMMDECL(int) PDMCritSectRwTryEnterExclDebug(PPDMCRITSECTRW pCritSect, RTHCUINTPTR uId, RT_SRC_POS_DECL);
VMMDECL(int) PDMCritSectRwLeaveExcl(PPDMCRITSECTRW pCritSect);
VMMDECL(bool) PDMCritSectRwIsWriteOwner(PPDMCRITSECTRW pCritSect);
VMMDECL(bool) PDMCritSectRwIsReadOwner(PPDMCRITSECTRW pCritSect, bool fWannaHear);
VMMDECL(uint32_t) PDMCritSectRwGetWriteRecursion(PPDMCRITSECTRW pCritSect);
VMMDECL(uint32_t) PDMCritSectRwGetWriterReadRecursion(PPDMCRITSECTRW pCritSect);
VMMDECL(uint32_t) PDMCritSectRwGetReadCount(PPDMCRITSECTRW pCritSect);
VMMDECL(bool) PDMCritSectRwIsInitialized(PCPDMCRITSECTRW pCritSect);
/* Lock strict build: Remap the three enter calls to the debug versions. */
#ifdef VBOX_STRICT
# ifdef ___iprt_asm_h
# define PDMCritSectRwEnterExcl(pCritSect, rcBusy) PDMCritSectRwEnterExclDebug(pCritSect, rcBusy, (uintptr_t)ASMReturnAddress(), RT_SRC_POS)
# define PDMCritSectRwTryEnterExcl(pCritSect) PDMCritSectRwTryEnterExclDebug(pCritSect, (uintptr_t)ASMReturnAddress(), RT_SRC_POS)
# define PDMCritSectRwEnterShared(pCritSect, rcBusy) PDMCritSectRwEnterSharedDebug(pCritSect, rcBusy, (uintptr_t)ASMReturnAddress(), RT_SRC_POS)
# define PDMCritSectRwTryEnterShared(pCritSect) PDMCritSectRwTryEnterSharedDebug(pCritSect, (uintptr_t)ASMReturnAddress(), RT_SRC_POS)
# else
# define PDMCritSectRwEnterExcl(pCritSect, rcBusy) PDMCritSectRwEnterExclDebug(pCritSect, rcBusy, 0, RT_SRC_POS)
# define PDMCritSectRwTryEnterExcl(pCritSect) PDMCritSectRwTryEnterExclDebug(pCritSect, 0, RT_SRC_POS)
# define PDMCritSectRwEnterShared(pCritSect, rcBusy) PDMCritSectRwEnterSharedDebug(pCritSect, rcBusy, 0, RT_SRC_POS)
# define PDMCritSectRwTryEnterShared(pCritSect) PDMCritSectRwTryEnterSharedDebug(pCritSect, 0, RT_SRC_POS)
# endif
#endif
/** @} */
RT_C_DECLS_END
#endif
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