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/** @file
* PDM - Pluggable Device Manager, Critical Sections.
*/
/*
* Copyright (C) 2006-2022 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox 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.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
#ifndef VBOX_INCLUDED_vmm_pdmcritsect_h
#define VBOX_INCLUDED_vmm_pdmcritsect_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <VBox/types.h>
#include <iprt/critsect.h>
RT_C_DECLS_BEGIN
/** @defgroup grp_pdm_critsect The PDM Critical Section API
* @ingroup grp_pdm
* @{
*/
/**
* A PDM critical section.
* Initialize using PDMDRVHLP::pfnCritSectInit().
*/
typedef union PDMCRITSECT
{
/** Padding. */
uint8_t padding[HC_ARCH_BITS == 32 ? 0xc0 : 0x100];
#ifdef PDMCRITSECTINT_DECLARED
/** The internal structure (not normally visible). */
struct PDMCRITSECTINT s;
#endif
} PDMCRITSECT;
VMMR3_INT_DECL(int) PDMR3CritSectBothTerm(PVM pVM);
VMMR3_INT_DECL(void) PDMR3CritSectLeaveAll(PVM pVM);
VMM_INT_DECL(void) PDMCritSectBothFF(PVMCC pVM, PVMCPUCC pVCpu);
VMMR3DECL(uint32_t) PDMR3CritSectCountOwned(PVM pVM, char *pszNames, size_t cbNames);
VMMR3DECL(int) PDMR3CritSectInit(PVM pVM, PPDMCRITSECT pCritSect, RT_SRC_POS_DECL,
const char *pszNameFmt, ...) RT_IPRT_FORMAT_ATTR(6, 7);
VMMR3DECL(int) PDMR3CritSectEnterEx(PVM pVM, PPDMCRITSECT pCritSect, bool fCallRing3);
VMMR3DECL(bool) PDMR3CritSectYield(PVM pVM, PPDMCRITSECT pCritSect);
VMMR3DECL(const char *) PDMR3CritSectName(PCPDMCRITSECT pCritSect);
VMMR3DECL(int) PDMR3CritSectDelete(PVM pVM, PPDMCRITSECT pCritSect);
#if defined(IN_RING0) || defined(IN_RING3)
VMMDECL(int) PDMHCCritSectScheduleExitEvent(PPDMCRITSECT pCritSect, SUPSEMEVENT hEventToSignal);
#endif
VMMDECL(DECL_CHECK_RETURN_NOT_R3(int))
PDMCritSectEnter(PVMCC pVM, PPDMCRITSECT pCritSect, int rcBusy);
VMMDECL(DECL_CHECK_RETURN_NOT_R3(int))
PDMCritSectEnterDebug(PVMCC pVM, PPDMCRITSECT pCritSect, int rcBusy, RTHCUINTPTR uId, RT_SRC_POS_DECL);
VMMDECL(DECL_CHECK_RETURN(int))
PDMCritSectTryEnter(PVMCC pVM, PPDMCRITSECT pCritSect);
VMMDECL(DECL_CHECK_RETURN(int))
PDMCritSectTryEnterDebug(PVMCC pVM, PPDMCRITSECT pCritSect, RTHCUINTPTR uId, RT_SRC_POS_DECL);
VMMDECL(int) PDMCritSectLeave(PVMCC pVM, PPDMCRITSECT pCritSect);
VMMDECL(bool) PDMCritSectIsOwner(PVMCC pVM, PCPDMCRITSECT pCritSect);
VMMDECL(bool) PDMCritSectIsOwnerEx(PVMCPUCC pVCpu, PCPDMCRITSECT pCritSect);
VMMDECL(bool) PDMCritSectIsInitialized(PCPDMCRITSECT pCritSect);
VMMDECL(bool) PDMCritSectHasWaiters(PVMCC pVM, PCPDMCRITSECT pCritSect);
VMMDECL(uint32_t) PDMCritSectGetRecursion(PCPDMCRITSECT pCritSect);
VMMR3DECL(PPDMCRITSECT) PDMR3CritSectGetNop(PVM pVM);
/* Strict build: Remap the two enter calls to the debug versions. */
#ifdef VBOX_STRICT
# ifdef IPRT_INCLUDED_asm_h
# define PDMCritSectEnter(a_pVM, pCritSect, rcBusy) PDMCritSectEnterDebug((a_pVM), (pCritSect), (rcBusy), (uintptr_t)ASMReturnAddress(), RT_SRC_POS)
# define PDMCritSectTryEnter(a_pVM, pCritSect) PDMCritSectTryEnterDebug((a_pVM), (pCritSect), (uintptr_t)ASMReturnAddress(), RT_SRC_POS)
# else
# define PDMCritSectEnter(a_pVM, pCritSect, rcBusy) PDMCritSectEnterDebug((a_pVM), (pCritSect), (rcBusy), 0, RT_SRC_POS)
# define PDMCritSectTryEnter(a_pVM, pCritSect) PDMCritSectTryEnterDebug((a_pVM), (pCritSect), 0, RT_SRC_POS)
# endif
#endif
/** @def PDM_CRITSECT_RELEASE_ASSERT_RC
* Helper for PDMCritSectEnter w/ rcBusy VINF_SUCCESS when there is no way
* to forward failures to the caller. */
#define PDM_CRITSECT_RELEASE_ASSERT_RC(a_pVM, a_pCritSect, a_rc) \
AssertReleaseMsg(RT_SUCCESS(a_rc), ("pVM=%p pCritSect=%p: %Rrc\n", (a_pVM), (a_pCritSect), (a_rc)))
/** @def PDM_CRITSECT_RELEASE_ASSERT_RC_DEV
* Helper for PDMCritSectEnter w/ rcBusy VINF_SUCCESS when there is no way
* to forward failures to the caller, device edition. */
#define PDM_CRITSECT_RELEASE_ASSERT_RC_DEV(a_pDevIns, a_pCritSect, a_rc) \
AssertReleaseMsg(RT_SUCCESS(a_rc), ("pDevIns=%p pCritSect=%p: %Rrc\n", (a_pDevIns), (a_pCritSect), (a_rc)))
/** @def PDM_CRITSECT_RELEASE_ASSERT_RC_DRV
* Helper for PDMCritSectEnter w/ rcBusy VINF_SUCCESS when there is no way
* to forward failures to the caller, driver edition. */
#define PDM_CRITSECT_RELEASE_ASSERT_RC_DRV(a_pDrvIns, a_pCritSect, a_rc) \
AssertReleaseMsg(RT_SUCCESS(a_rc), ("pDrvIns=%p pCritSect=%p: %Rrc\n", (a_pDrvIns), (a_pCritSect), (a_rc)))
/** @def PDM_CRITSECT_RELEASE_ASSERT_RC_USB
* Helper for PDMCritSectEnter w/ rcBusy VINF_SUCCESS when there is no way
* to forward failures to the caller, USB device edition. */
#define PDM_CRITSECT_RELEASE_ASSERT_RC_USB(a_pUsbIns, a_pCritSect, a_rc) \
AssertReleaseMsg(RT_SUCCESS(a_rc), ("pUsbIns=%p pCritSect=%p: %Rrc\n", (a_pUsbIns), (a_pCritSect), (a_rc)))
/** @} */
RT_C_DECLS_END
#endif /* !VBOX_INCLUDED_vmm_pdmcritsect_h */
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