r0drv/solaris/semeventmulti-r0drv-solaris.c

089c21a647af46044cad04a78cfdcfae814d2105vboxsync/* $Id$ */
089c21a647af46044cad04a78cfdcfae814d2105vboxsync/** @file
5b281ba489ca18f0380d7efc7a5108b606cce449vboxsync * IPRT - Multiple Release Event Semaphores, Ring-0 Driver, Solaris.
089c21a647af46044cad04a78cfdcfae814d2105vboxsync */
089c21a647af46044cad04a78cfdcfae814d2105vboxsync
089c21a647af46044cad04a78cfdcfae814d2105vboxsync/*
c23e6bb766b466a1dda743e7c48b5624ae8e7c7bvboxsync * Copyright (C) 2006-2014 Oracle Corporation
089c21a647af46044cad04a78cfdcfae814d2105vboxsync *
089c21a647af46044cad04a78cfdcfae814d2105vboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
089c21a647af46044cad04a78cfdcfae814d2105vboxsync * available from http://www.virtualbox.org. This file is free software;
089c21a647af46044cad04a78cfdcfae814d2105vboxsync * you can redistribute it and/or modify it under the terms of the GNU
a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fcvboxsync * General Public License (GPL) as published by the Free Software
a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fcvboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fcvboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fcvboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fcvboxsync *
a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fcvboxsync * The contents of this file may alternatively be used under the terms
a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fcvboxsync * of the Common Development and Distribution License Version 1.0
a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fcvboxsync * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fcvboxsync * VirtualBox OSE distribution, in which case the provisions of the
a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fcvboxsync * CDDL are applicable instead of those of the GPL.
a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fcvboxsync *
a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fcvboxsync * You may elect to license modified versions of this file under the
a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fcvboxsync * terms and conditions of either the GPL or the CDDL or both.
089c21a647af46044cad04a78cfdcfae814d2105vboxsync */
089c21a647af46044cad04a78cfdcfae814d2105vboxsync
089c21a647af46044cad04a78cfdcfae814d2105vboxsync
089c21a647af46044cad04a78cfdcfae814d2105vboxsync/*******************************************************************************
089c21a647af46044cad04a78cfdcfae814d2105vboxsync*   Header Files                                                               *
089c21a647af46044cad04a78cfdcfae814d2105vboxsync*******************************************************************************/
715e49c31b15c23c17a9ce3be42a75e7c48d4b78vboxsync#define RTSEMEVENTMULTI_WITHOUT_REMAPPING
089c21a647af46044cad04a78cfdcfae814d2105vboxsync#include "the-solaris-kernel.h"
9c11b89c71ca727d975c39f2719063501ddcd03dvboxsync#include "internal/iprt.h"
089c21a647af46044cad04a78cfdcfae814d2105vboxsync#include <iprt/semaphore.h>
9c11b89c71ca727d975c39f2719063501ddcd03dvboxsync
089c21a647af46044cad04a78cfdcfae814d2105vboxsync#include <iprt/assert.h>
9c11b89c71ca727d975c39f2719063501ddcd03dvboxsync#include <iprt/asm.h>
cbd4e5863be36b70c59ebeb02a611a763f9d58f1vboxsync#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
cbd4e5863be36b70c59ebeb02a611a763f9d58f1vboxsync# include <iprt/asm-amd64-x86.h>
cbd4e5863be36b70c59ebeb02a611a763f9d58f1vboxsync#endif
089c21a647af46044cad04a78cfdcfae814d2105vboxsync#include <iprt/err.h>
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync#include <iprt/lockvalidator.h>
9c11b89c71ca727d975c39f2719063501ddcd03dvboxsync#include <iprt/mem.h>
9c11b89c71ca727d975c39f2719063501ddcd03dvboxsync#include <iprt/mp.h>
9c11b89c71ca727d975c39f2719063501ddcd03dvboxsync#include <iprt/thread.h>
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync#include <iprt/time.h>
089c21a647af46044cad04a78cfdcfae814d2105vboxsync#include "internal/magics.h"
3bad884471a4755d52abffc98cc326f153750ca1vboxsync#include "semeventwait-r0drv-solaris.h"
089c21a647af46044cad04a78cfdcfae814d2105vboxsync
089c21a647af46044cad04a78cfdcfae814d2105vboxsync
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync/*******************************************************************************
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync*   Defined Constants And Macros                                               *
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync*******************************************************************************/
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync/** @name fStateAndGen values
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync * @{ */
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync/** The state bit number. */
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync#define RTSEMEVENTMULTISOL_STATE_BIT        0
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync/** The state mask. */
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync#define RTSEMEVENTMULTISOL_STATE_MASK       RT_BIT_32(RTSEMEVENTMULTISOL_STATE_BIT)
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync/** The generation mask. */
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync#define RTSEMEVENTMULTISOL_GEN_MASK         ~RTSEMEVENTMULTISOL_STATE_MASK
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync/** The generation shift. */
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync#define RTSEMEVENTMULTISOL_GEN_SHIFT        1
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync/** The initial variable value. */
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync#define RTSEMEVENTMULTISOL_STATE_GEN_INIT   UINT32_C(0xfffffffc)
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync/** @}  */
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync
089c21a647af46044cad04a78cfdcfae814d2105vboxsync/*******************************************************************************
089c21a647af46044cad04a78cfdcfae814d2105vboxsync*   Structures and Typedefs                                                    *
089c21a647af46044cad04a78cfdcfae814d2105vboxsync*******************************************************************************/
089c21a647af46044cad04a78cfdcfae814d2105vboxsync/**
63e576f3c901db19ac9a11f2353025b66a6798eevboxsync * Solaris multiple release event semaphore.
089c21a647af46044cad04a78cfdcfae814d2105vboxsync */
089c21a647af46044cad04a78cfdcfae814d2105vboxsynctypedef struct RTSEMEVENTMULTIINTERNAL
089c21a647af46044cad04a78cfdcfae814d2105vboxsync{
089c21a647af46044cad04a78cfdcfae814d2105vboxsync    /** Magic value (RTSEMEVENTMULTI_MAGIC). */
089c21a647af46044cad04a78cfdcfae814d2105vboxsync    uint32_t volatile   u32Magic;
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync    /** The number of references. */
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    uint32_t volatile   cRefs;
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    /** The object state bit and generation counter.
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync     * The generation counter is incremented every time the object is
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync     * signalled. */
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    uint32_t volatile   fStateAndGen;
089c21a647af46044cad04a78cfdcfae814d2105vboxsync    /** The Solaris mutex protecting this structure and pairing up the with the cv. */
089c21a647af46044cad04a78cfdcfae814d2105vboxsync    kmutex_t            Mtx;
089c21a647af46044cad04a78cfdcfae814d2105vboxsync    /** The Solaris condition variable. */
089c21a647af46044cad04a78cfdcfae814d2105vboxsync    kcondvar_t          Cnd;
089c21a647af46044cad04a78cfdcfae814d2105vboxsync} RTSEMEVENTMULTIINTERNAL, *PRTSEMEVENTMULTIINTERNAL;
089c21a647af46044cad04a78cfdcfae814d2105vboxsync
089c21a647af46044cad04a78cfdcfae814d2105vboxsync
9c11b89c71ca727d975c39f2719063501ddcd03dvboxsync
ab93606043a9881487aa83be04191d2f4ea24071vboxsyncRTDECL(int)  RTSemEventMultiCreate(PRTSEMEVENTMULTI phEventMultiSem)
089c21a647af46044cad04a78cfdcfae814d2105vboxsync{
ab93606043a9881487aa83be04191d2f4ea24071vboxsync    return RTSemEventMultiCreateEx(phEventMultiSem, 0 /*fFlags*/, NIL_RTLOCKVALCLASS, NULL);
ab93606043a9881487aa83be04191d2f4ea24071vboxsync}
ab93606043a9881487aa83be04191d2f4ea24071vboxsync
ab93606043a9881487aa83be04191d2f4ea24071vboxsync
ab93606043a9881487aa83be04191d2f4ea24071vboxsyncRTDECL(int)  RTSemEventMultiCreateEx(PRTSEMEVENTMULTI phEventMultiSem, uint32_t fFlags, RTLOCKVALCLASS hClass,
ab93606043a9881487aa83be04191d2f4ea24071vboxsync                                     const char *pszNameFmt, ...)
ab93606043a9881487aa83be04191d2f4ea24071vboxsync{
ab93606043a9881487aa83be04191d2f4ea24071vboxsync    AssertReturn(!(fFlags & ~RTSEMEVENTMULTI_FLAGS_NO_LOCK_VAL), VERR_INVALID_PARAMETER);
ab93606043a9881487aa83be04191d2f4ea24071vboxsync    AssertPtrReturn(phEventMultiSem, VERR_INVALID_POINTER);
9c11b89c71ca727d975c39f2719063501ddcd03dvboxsync    RT_ASSERT_PREEMPTIBLE();
089c21a647af46044cad04a78cfdcfae814d2105vboxsync
ab93606043a9881487aa83be04191d2f4ea24071vboxsync    AssertCompile(sizeof(RTSEMEVENTMULTIINTERNAL) > sizeof(void *));
a68835e2c9d5426d501f1bc78ff30e8ec5bb12cevboxsync    PRTSEMEVENTMULTIINTERNAL pThis = (PRTSEMEVENTMULTIINTERNAL)RTMemAlloc(sizeof(*pThis));
a68835e2c9d5426d501f1bc78ff30e8ec5bb12cevboxsync    if (pThis)
089c21a647af46044cad04a78cfdcfae814d2105vboxsync    {
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync        pThis->u32Magic     = RTSEMEVENTMULTI_MAGIC;
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync        pThis->cRefs        = 1;
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync        pThis->fStateAndGen = RTSEMEVENTMULTISOL_STATE_GEN_INIT;
249acff39649895e369c7d0c07d3d0adc4e10f38vboxsync        mutex_init(&pThis->Mtx, "IPRT Multiple Release Event Semaphore", MUTEX_DRIVER, (void *)ipltospl(DISP_LEVEL));
a68835e2c9d5426d501f1bc78ff30e8ec5bb12cevboxsync        cv_init(&pThis->Cnd, "IPRT CV", CV_DRIVER, NULL);
ab93606043a9881487aa83be04191d2f4ea24071vboxsync
ab93606043a9881487aa83be04191d2f4ea24071vboxsync        *phEventMultiSem = pThis;
089c21a647af46044cad04a78cfdcfae814d2105vboxsync        return VINF_SUCCESS;
089c21a647af46044cad04a78cfdcfae814d2105vboxsync    }
089c21a647af46044cad04a78cfdcfae814d2105vboxsync    return VERR_NO_MEMORY;
089c21a647af46044cad04a78cfdcfae814d2105vboxsync}
089c21a647af46044cad04a78cfdcfae814d2105vboxsync
089c21a647af46044cad04a78cfdcfae814d2105vboxsync
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync/**
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync * Retain a reference to the semaphore.
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync *
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync * @param   pThis       The semaphore.
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync */
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsyncDECLINLINE(void) rtR0SemEventMultiSolRetain(PRTSEMEVENTMULTIINTERNAL pThis)
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync{
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    uint32_t cRefs = ASMAtomicIncU32(&pThis->cRefs);
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    Assert(cRefs && cRefs < 100000);
1cf1be14d8a1ba2a1af75ba8d6b12078f1fb14d2vboxsync    NOREF(cRefs);
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync}
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync/**
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync * Destructor that is called when cRefs == 0.
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync *
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync * @param   pThis       The instance to destroy.
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync */
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsyncstatic void rtSemEventMultiDtor(PRTSEMEVENTMULTIINTERNAL pThis)
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync{
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    Assert(pThis->u32Magic != RTSEMEVENTMULTI_MAGIC);
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync    cv_destroy(&pThis->Cnd);
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync    mutex_destroy(&pThis->Mtx);
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync    RTMemFree(pThis);
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync}
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync/**
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync * Release a reference, destroy the thing if necessary.
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync *
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync * @param   pThis       The semaphore.
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync */
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsyncDECLINLINE(void) rtR0SemEventMultiSolRelease(PRTSEMEVENTMULTIINTERNAL pThis)
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync{
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    if (RT_UNLIKELY(ASMAtomicDecU32(&pThis->cRefs) == 0))
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync        rtSemEventMultiDtor(pThis);
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync}
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync
ab93606043a9881487aa83be04191d2f4ea24071vboxsyncRTDECL(int)  RTSemEventMultiDestroy(RTSEMEVENTMULTI hEventMultiSem)
089c21a647af46044cad04a78cfdcfae814d2105vboxsync{
ab93606043a9881487aa83be04191d2f4ea24071vboxsync    PRTSEMEVENTMULTIINTERNAL pThis = (PRTSEMEVENTMULTIINTERNAL)hEventMultiSem;
ab93606043a9881487aa83be04191d2f4ea24071vboxsync    if (pThis == NIL_RTSEMEVENTMULTI)
ab93606043a9881487aa83be04191d2f4ea24071vboxsync        return VINF_SUCCESS;
a68835e2c9d5426d501f1bc78ff30e8ec5bb12cevboxsync    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
ab93606043a9881487aa83be04191d2f4ea24071vboxsync    AssertMsgReturn(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC, ("pThis=%p u32Magic=%#x\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync    AssertMsgReturn(pThis->cRefs > 0, ("pThis=%p cRefs=%d\n", pThis, pThis->cRefs), VERR_INVALID_HANDLE);
9c11b89c71ca727d975c39f2719063501ddcd03dvboxsync    RT_ASSERT_INTS_ON();
089c21a647af46044cad04a78cfdcfae814d2105vboxsync
a68835e2c9d5426d501f1bc78ff30e8ec5bb12cevboxsync    mutex_enter(&pThis->Mtx);
63e576f3c901db19ac9a11f2353025b66a6798eevboxsync
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync    /* Invalidate the handle and wake up all threads that might be waiting on the semaphore. */
63e576f3c901db19ac9a11f2353025b66a6798eevboxsync    Assert(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC);
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    ASMAtomicWriteU32(&pThis->u32Magic, RTSEMEVENTMULTI_MAGIC_DEAD);
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    ASMAtomicAndU32(&pThis->fStateAndGen, RTSEMEVENTMULTISOL_GEN_MASK);
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync    cv_broadcast(&pThis->Cnd);
63e576f3c901db19ac9a11f2353025b66a6798eevboxsync
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync    /* Drop the reference from RTSemEventMultiCreateEx. */
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    mutex_exit(&pThis->Mtx);
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    rtR0SemEventMultiSolRelease(pThis);
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    return VINF_SUCCESS;
089c21a647af46044cad04a78cfdcfae814d2105vboxsync}
089c21a647af46044cad04a78cfdcfae814d2105vboxsync
089c21a647af46044cad04a78cfdcfae814d2105vboxsync
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsyncRTDECL(int) RTSemEventMultiSignal(RTSEMEVENTMULTI hEventMultiSem)
089c21a647af46044cad04a78cfdcfae814d2105vboxsync{
ab93606043a9881487aa83be04191d2f4ea24071vboxsync    PRTSEMEVENTMULTIINTERNAL pThis = (PRTSEMEVENTMULTIINTERNAL)hEventMultiSem;
9c11b89c71ca727d975c39f2719063501ddcd03dvboxsync    RT_ASSERT_PREEMPT_CPUID_VAR();
9c11b89c71ca727d975c39f2719063501ddcd03dvboxsync
a68835e2c9d5426d501f1bc78ff30e8ec5bb12cevboxsync    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
a68835e2c9d5426d501f1bc78ff30e8ec5bb12cevboxsync    AssertMsgReturn(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC,
a68835e2c9d5426d501f1bc78ff30e8ec5bb12cevboxsync                    ("pThis=%p u32Magic=%#x\n", pThis, pThis->u32Magic),
089c21a647af46044cad04a78cfdcfae814d2105vboxsync                    VERR_INVALID_HANDLE);
9c11b89c71ca727d975c39f2719063501ddcd03dvboxsync    RT_ASSERT_INTS_ON();
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    rtR0SemEventMultiSolRetain(pThis);
3bad884471a4755d52abffc98cc326f153750ca1vboxsync    rtR0SemSolWaitEnterMutexWithUnpinningHack(&pThis->Mtx);
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync    Assert(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC);
089c21a647af46044cad04a78cfdcfae814d2105vboxsync
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync    /*
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync     * Do the job.
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync     */
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    uint32_t fNew = ASMAtomicUoReadU32(&pThis->fStateAndGen);
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    fNew += 1 << RTSEMEVENTMULTISOL_GEN_SHIFT;
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    fNew |= RTSEMEVENTMULTISOL_STATE_MASK;
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    ASMAtomicWriteU32(&pThis->fStateAndGen, fNew);
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync    cv_broadcast(&pThis->Cnd);
089c21a647af46044cad04a78cfdcfae814d2105vboxsync
a68835e2c9d5426d501f1bc78ff30e8ec5bb12cevboxsync    mutex_exit(&pThis->Mtx);
9c11b89c71ca727d975c39f2719063501ddcd03dvboxsync
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    rtR0SemEventMultiSolRelease(pThis);
858960add9f9dc845ad839300639ca2d932a1715vboxsync#ifdef DEBUG_ramshankar
c23e6bb766b466a1dda743e7c48b5624ae8e7c7bvboxsync    /** See @bugref{6318} comment #11. */
858960add9f9dc845ad839300639ca2d932a1715vboxsync    return VINF_SUCCESS;
858960add9f9dc845ad839300639ca2d932a1715vboxsync#endif
9c11b89c71ca727d975c39f2719063501ddcd03dvboxsync    RT_ASSERT_PREEMPT_CPUID();
089c21a647af46044cad04a78cfdcfae814d2105vboxsync    return VINF_SUCCESS;
089c21a647af46044cad04a78cfdcfae814d2105vboxsync}
089c21a647af46044cad04a78cfdcfae814d2105vboxsync
089c21a647af46044cad04a78cfdcfae814d2105vboxsync
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsyncRTDECL(int) RTSemEventMultiReset(RTSEMEVENTMULTI hEventMultiSem)
089c21a647af46044cad04a78cfdcfae814d2105vboxsync{
ab93606043a9881487aa83be04191d2f4ea24071vboxsync    PRTSEMEVENTMULTIINTERNAL pThis = (PRTSEMEVENTMULTIINTERNAL)hEventMultiSem;
9c11b89c71ca727d975c39f2719063501ddcd03dvboxsync    RT_ASSERT_PREEMPT_CPUID_VAR();
9c11b89c71ca727d975c39f2719063501ddcd03dvboxsync
a68835e2c9d5426d501f1bc78ff30e8ec5bb12cevboxsync    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
a68835e2c9d5426d501f1bc78ff30e8ec5bb12cevboxsync    AssertMsgReturn(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC,
a68835e2c9d5426d501f1bc78ff30e8ec5bb12cevboxsync                    ("pThis=%p u32Magic=%#x\n", pThis, pThis->u32Magic),
089c21a647af46044cad04a78cfdcfae814d2105vboxsync                    VERR_INVALID_HANDLE);
9c11b89c71ca727d975c39f2719063501ddcd03dvboxsync    RT_ASSERT_INTS_ON();
089c21a647af46044cad04a78cfdcfae814d2105vboxsync
3bad884471a4755d52abffc98cc326f153750ca1vboxsync    rtR0SemEventMultiSolRetain(pThis);
3bad884471a4755d52abffc98cc326f153750ca1vboxsync    rtR0SemSolWaitEnterMutexWithUnpinningHack(&pThis->Mtx);
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync    Assert(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC);
1564530634daa6810ea98bfc6dccb727728df853vboxsync
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync    /*
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync     * Do the job (could be done without the lock, but play safe).
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync     */
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    ASMAtomicAndU32(&pThis->fStateAndGen, ~RTSEMEVENTMULTISOL_STATE_MASK);
ba2ad20e44479a5831d039c736a0d4ed2aa7d65bvboxsync
a68835e2c9d5426d501f1bc78ff30e8ec5bb12cevboxsync    mutex_exit(&pThis->Mtx);
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    rtR0SemEventMultiSolRelease(pThis);
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync
858960add9f9dc845ad839300639ca2d932a1715vboxsync#ifdef DEBUG_ramshankar
c23e6bb766b466a1dda743e7c48b5624ae8e7c7bvboxsync    /** See @bugref{6318} comment #11. */
858960add9f9dc845ad839300639ca2d932a1715vboxsync    return VINF_SUCCESS;
858960add9f9dc845ad839300639ca2d932a1715vboxsync#endif
3bad884471a4755d52abffc98cc326f153750ca1vboxsync    RT_ASSERT_PREEMPT_CPUID();
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    return VINF_SUCCESS;
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync}
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync/**
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync * Worker for RTSemEventMultiWaitEx and RTSemEventMultiWaitExDebug.
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync *
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync * @returns VBox status code.
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync * @param   pThis           The event semaphore.
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync * @param   fFlags          See RTSemEventMultiWaitEx.
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync * @param   uTimeout        See RTSemEventMultiWaitEx.
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync * @param   pSrcPos         The source code position of the wait.
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync */
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsyncstatic int rtR0SemEventMultiSolWait(PRTSEMEVENTMULTIINTERNAL pThis, uint32_t fFlags, uint64_t uTimeout,
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync                                    PCRTLOCKVALSRCPOS pSrcPos)
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync{
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    uint32_t    fOrgStateAndGen;
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    int         rc;
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    /*
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync     * Validate the input.
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync     */
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    AssertPtrReturn(pThis, VERR_INVALID_PARAMETER);
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    AssertMsgReturn(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC, ("%p u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_PARAMETER);
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    AssertReturn(RTSEMWAIT_FLAGS_ARE_VALID(fFlags), VERR_INVALID_PARAMETER);
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    rtR0SemEventMultiSolRetain(pThis);
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    mutex_enter(&pThis->Mtx); /* this could be moved down to the else, but play safe for now. */
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    /*
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync     * Is the event already signalled or do we have to wait?
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync     */
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    fOrgStateAndGen = ASMAtomicUoReadU32(&pThis->fStateAndGen);
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    if (fOrgStateAndGen & RTSEMEVENTMULTISOL_STATE_MASK)
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync        rc = VINF_SUCCESS;
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    else
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    {
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync        /*
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync         * We have to wait.
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync         */
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync        RTR0SEMSOLWAIT Wait;
0b7d24ee33cf513ef5a83fc9d6b9ba0a0427b39cvboxsync        rc = rtR0SemSolWaitInit(&Wait, fFlags, uTimeout);
0b7d24ee33cf513ef5a83fc9d6b9ba0a0427b39cvboxsync        if (RT_SUCCESS(rc))
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync        {
0b7d24ee33cf513ef5a83fc9d6b9ba0a0427b39cvboxsync            for (;;)
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync            {
0b7d24ee33cf513ef5a83fc9d6b9ba0a0427b39cvboxsync                /* The destruction test. */
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync                if (RT_UNLIKELY(pThis->u32Magic != RTSEMEVENTMULTI_MAGIC))
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync                    rc = VERR_SEM_DESTROYED;
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync                else
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync                {
0b7d24ee33cf513ef5a83fc9d6b9ba0a0427b39cvboxsync                    /* Check the exit conditions. */
0b7d24ee33cf513ef5a83fc9d6b9ba0a0427b39cvboxsync                    if (RT_UNLIKELY(pThis->u32Magic != RTSEMEVENTMULTI_MAGIC))
0b7d24ee33cf513ef5a83fc9d6b9ba0a0427b39cvboxsync                        rc = VERR_SEM_DESTROYED;
0b7d24ee33cf513ef5a83fc9d6b9ba0a0427b39cvboxsync                    else if (ASMAtomicUoReadU32(&pThis->fStateAndGen) != fOrgStateAndGen)
0b7d24ee33cf513ef5a83fc9d6b9ba0a0427b39cvboxsync                        rc = VINF_SUCCESS;
0b7d24ee33cf513ef5a83fc9d6b9ba0a0427b39cvboxsync                    else if (rtR0SemSolWaitHasTimedOut(&Wait))
0b7d24ee33cf513ef5a83fc9d6b9ba0a0427b39cvboxsync                        rc = VERR_TIMEOUT;
0b7d24ee33cf513ef5a83fc9d6b9ba0a0427b39cvboxsync                    else if (rtR0SemSolWaitWasInterrupted(&Wait))
0b7d24ee33cf513ef5a83fc9d6b9ba0a0427b39cvboxsync                        rc = VERR_INTERRUPTED;
0b7d24ee33cf513ef5a83fc9d6b9ba0a0427b39cvboxsync                    else
0b7d24ee33cf513ef5a83fc9d6b9ba0a0427b39cvboxsync                    {
0b7d24ee33cf513ef5a83fc9d6b9ba0a0427b39cvboxsync                        /* Do the wait and then recheck the conditions. */
4030b8473736055cd02947418ef4f8f9b1945323vboxsync                        rtR0SemSolWaitDoIt(&Wait, &pThis->Cnd, &pThis->Mtx, &pThis->fStateAndGen, fOrgStateAndGen);
0b7d24ee33cf513ef5a83fc9d6b9ba0a0427b39cvboxsync                        continue;
0b7d24ee33cf513ef5a83fc9d6b9ba0a0427b39cvboxsync                    }
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync                }
0b7d24ee33cf513ef5a83fc9d6b9ba0a0427b39cvboxsync                break;
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync            }
0b7d24ee33cf513ef5a83fc9d6b9ba0a0427b39cvboxsync            rtR0SemSolWaitDelete(&Wait);
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync        }
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    }
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    mutex_exit(&pThis->Mtx);
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    rtR0SemEventMultiSolRelease(pThis);
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    return rc;
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync}
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsyncRTDECL(int)  RTSemEventMultiWaitEx(RTSEMEVENTMULTI hEventMultiSem, uint32_t fFlags, uint64_t uTimeout)
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync{
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync#ifndef RTSEMEVENT_STRICT
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    return rtR0SemEventMultiSolWait(hEventMultiSem, fFlags, uTimeout, NULL);
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync#else
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    RTLOCKVALSRCPOS SrcPos = RTLOCKVALSRCPOS_INIT_NORMAL_API();
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    return rtR0SemEventMultiSolWait(hEventMultiSem, fFlags, uTimeout, &SrcPos);
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync#endif
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync}
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsyncRTDECL(int)  RTSemEventMultiWaitExDebug(RTSEMEVENTMULTI hEventMultiSem, uint32_t fFlags, uint64_t uTimeout,
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync                                        RTHCUINTPTR uId, RT_SRC_POS_DECL)
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync{
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    RTLOCKVALSRCPOS SrcPos = RTLOCKVALSRCPOS_INIT_DEBUG_API();
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync    return rtR0SemEventMultiSolWait(hEventMultiSem, fFlags, uTimeout, &SrcPos);
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync}
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync
b9c00cd9c9b5f409e64bd7782815faa2c5ecd85fvboxsync
e0e7da0420be1398d23ffa9953686d3a43619abdvboxsyncRTDECL(uint32_t) RTSemEventMultiGetResolution(void)
e0e7da0420be1398d23ffa9953686d3a43619abdvboxsync{
e0e7da0420be1398d23ffa9953686d3a43619abdvboxsync    return rtR0SemSolWaitGetResolution();
e0e7da0420be1398d23ffa9953686d3a43619abdvboxsync}
e0e7da0420be1398d23ffa9953686d3a43619abdvboxsync