r0drv/solaris/semevent-r0drv-solaris.c

	semevent-r0drv-solaris.c revision 175770d4533d92ff4ef576d5ea97e566cc488472
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync/* $Id$ */
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync/** @file
00fa3bc989ffe84474e828c8b90b24284dcfdf0cvboxsync * IPRT - Single Release Event Semaphores, Ring-0 Driver, Solaris.
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync */
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync/*
00fa3bc989ffe84474e828c8b90b24284dcfdf0cvboxsync * Copyright (C) 2006-2010 Oracle Corporation
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync *
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync * available from http://www.virtualbox.org. This file is free software;
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync * you can redistribute it and/or modify it under the terms of the GNU
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync * General Public License (GPL) as published by the Free Software
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync *
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync * The contents of this file may alternatively be used under the terms
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync * of the Common Development and Distribution License Version 1.0
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync * VirtualBox OSE distribution, in which case the provisions of the
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync * CDDL are applicable instead of those of the GPL.
43747b1f0bc8302a238fb35e55857a5e9aa1933dvboxsync *
43747b1f0bc8302a238fb35e55857a5e9aa1933dvboxsync * You may elect to license modified versions of this file under the
0c437bb10c61b229407a7517efde04dfe3b1e4a1vboxsync * terms and conditions of either the GPL or the CDDL or both.
43747b1f0bc8302a238fb35e55857a5e9aa1933dvboxsync */
0c437bb10c61b229407a7517efde04dfe3b1e4a1vboxsync
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync/*******************************************************************************
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync*   Header Files                                                               *
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync*******************************************************************************/
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync#define RTSEMEVENT_WITHOUT_REMAPPING
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync#include "the-solaris-kernel.h"
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync#include "internal/iprt.h"
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync#include <iprt/semaphore.h>
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync#include <iprt/assert.h>
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync#include <iprt/asm.h>
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync# include <iprt/asm-amd64-x86.h>
652d85a9390f54d4c6eca560340bf67ac1f85c9dvboxsync#endif
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync#include <iprt/err.h>
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync#include <iprt/list.h>
9347f1987dfb760943aba5a9ef094c6066901be3vboxsync#include <iprt/lockvalidator.h>
9347f1987dfb760943aba5a9ef094c6066901be3vboxsync#include <iprt/mem.h>
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync#include <iprt/mp.h>
9347f1987dfb760943aba5a9ef094c6066901be3vboxsync#include <iprt/thread.h>
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync#include "internal/magics.h"
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync#include "semeventwait-r0drv-solaris.h"
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync/*******************************************************************************
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync*   Structures and Typedefs                                                    *
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync*******************************************************************************/
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync/**
addc480d0d7650db6323467bbdab6c21836a2928vboxsync * Waiter entry.  Lives on the stack.
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync *
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync * @remarks Unfortunately, we cannot easily use cv_signal because we cannot
9347f1987dfb760943aba5a9ef094c6066901be3vboxsync *          distinguish between it and the spurious wakeups we get after fork.
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync *          So, we keep an unprioritized FIFO with the sleeping threads.
9347f1987dfb760943aba5a9ef094c6066901be3vboxsync */
9347f1987dfb760943aba5a9ef094c6066901be3vboxsynctypedef struct RTSEMEVENTSOLENTRY
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync{
1999ae03c34840fa4d712fd2e020120b2cb7182avboxsync    /** The list node. */
9347f1987dfb760943aba5a9ef094c6066901be3vboxsync    RTLISTNODE          Node;
1999ae03c34840fa4d712fd2e020120b2cb7182avboxsync    /** The thread. */
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync    kthread_t          *pThread;
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync    /** Flag set when waking up the thread by signal or destroy. */
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync    bool volatile       fWokenUp;
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync} RTSEMEVENTSOLENTRY;
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync/** Pointer to waiter entry. */
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsynctypedef RTSEMEVENTSOLENTRY *PRTSEMEVENTSOLENTRY;
faa31dfcb46e5e2fb9c2bf224d113a0ca136ddecvboxsync
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync/**
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync * Solaris event semaphore.
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync */
1999ae03c34840fa4d712fd2e020120b2cb7182avboxsynctypedef struct RTSEMEVENTINTERNAL
2fb42335a74fe26c4e2bccbf16f077015e42a5e1vboxsync{
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync    /** Magic value (RTSEMEVENT_MAGIC). */
d89d64f261b0fecda692038bc6351dedf996c563vboxsync    uint32_t volatile   u32Magic;
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync    /** The number of threads referencing this object. */
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync    uint32_t volatile   cRefs;
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync    /** Set if the object is signalled when there are no waiters. */
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync    bool                fSignaled;
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync    /** List of waiting and woken up threads. */
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync    RTLISTNODE          WaitList;
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync    /** The Solaris mutex protecting this structure and pairing up the with the cv. */
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync    kmutex_t            Mtx;
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync    /** The Solaris condition variable. */
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync    kcondvar_t          Cnd;
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync} RTSEMEVENTINTERNAL, *PRTSEMEVENTINTERNAL;
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsyncRTDECL(int)  RTSemEventCreate(PRTSEMEVENT phEventSem)
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync{
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync    return RTSemEventCreateEx(phEventSem, 0 /*fFlags*/, NIL_RTLOCKVALCLASS, NULL);
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync}
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsyncRTDECL(int)  RTSemEventCreateEx(PRTSEMEVENT phEventSem, uint32_t fFlags, RTLOCKVALCLASS hClass, const char *pszNameFmt, ...)
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync{
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync    AssertCompile(sizeof(RTSEMEVENTINTERNAL) > sizeof(void *));
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync    AssertReturn(!(fFlags & ~(RTSEMEVENT_FLAGS_NO_LOCK_VAL | RTSEMEVENT_FLAGS_BOOTSTRAP_HACK)), VERR_INVALID_PARAMETER);
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync    Assert(!(fFlags & RTSEMEVENT_FLAGS_BOOTSTRAP_HACK) || (fFlags & RTSEMEVENT_FLAGS_NO_LOCK_VAL));
addc480d0d7650db6323467bbdab6c21836a2928vboxsync    AssertPtrReturn(phEventSem, VERR_INVALID_POINTER);
addc480d0d7650db6323467bbdab6c21836a2928vboxsync    RT_ASSERT_PREEMPTIBLE();
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync    PRTSEMEVENTINTERNAL pThis = (PRTSEMEVENTINTERNAL)RTMemAlloc(sizeof(*pThis));
addc480d0d7650db6323467bbdab6c21836a2928vboxsync    if (!pThis)
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync        return VERR_NO_MEMORY;
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync    pThis->u32Magic       = RTSEMEVENT_MAGIC;
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync    pThis->cRefs          = 1;
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync    pThis->fSignaled      = false;
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync    RTListInit(&pThis->WaitList);
addc480d0d7650db6323467bbdab6c21836a2928vboxsync    mutex_init(&pThis->Mtx, "IPRT Event Semaphore", MUTEX_DRIVER, (void *)ipltospl(DISP_LEVEL));
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync    cv_init(&pThis->Cnd, "IPRT CV", CV_DRIVER, NULL);
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync    *phEventSem = pThis;
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync    return VINF_SUCCESS;
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync}
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync
8de98485a60eb742b1d720a8cb9747dc03e821a8vboxsync
8de98485a60eb742b1d720a8cb9747dc03e821a8vboxsync/**
faa31dfcb46e5e2fb9c2bf224d113a0ca136ddecvboxsync * Retain a reference to the semaphore.
8de98485a60eb742b1d720a8cb9747dc03e821a8vboxsync *
8de98485a60eb742b1d720a8cb9747dc03e821a8vboxsync * @param   pThis       The semaphore.
8de98485a60eb742b1d720a8cb9747dc03e821a8vboxsync */
faa31dfcb46e5e2fb9c2bf224d113a0ca136ddecvboxsyncDECLINLINE(void) rtR0SemEventSolRetain(PRTSEMEVENTINTERNAL pThis)
8de98485a60eb742b1d720a8cb9747dc03e821a8vboxsync{
8de98485a60eb742b1d720a8cb9747dc03e821a8vboxsync    uint32_t cRefs = ASMAtomicIncU32(&pThis->cRefs);
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync    Assert(cRefs && cRefs < 100000);
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync    NOREF(cRefs);
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync}
ec21c063515d0931111f0c1f8d6f4bc8e7a6c882vboxsync
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync/**
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync * The destruct.
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync *
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync * @param   pThis       The semaphore.
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync */
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsyncstatic void rtR0SemEventSolDtor(PRTSEMEVENTINTERNAL pThis)
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync{
4ace9bce00c6d792391a0e064131716659e3a922vboxsync    Assert(pThis->u32Magic != RTSEMEVENT_MAGIC);
760446f710619a9daa6cedc7f0601f49e4ea3442vboxsync    cv_destroy(&pThis->Cnd);
    mutex_destroy(&pThis->Mtx);
    RTMemFree(pThis);
}


/**
 * Release a reference, destroy the thing if necessary.
 *
 * @param   pThis       The semaphore.
 */
DECLINLINE(void) rtR0SemEventSolRelease(PRTSEMEVENTINTERNAL pThis)
{
    if (RT_UNLIKELY(ASMAtomicDecU32(&pThis->cRefs) == 0))
        rtR0SemEventSolDtor(pThis);
}


RTDECL(int)  RTSemEventDestroy(RTSEMEVENT hEventSem)
{
    /*
     * Validate input.
     */
    PRTSEMEVENTINTERNAL pThis = hEventSem;
    if (pThis == NIL_RTSEMEVENT)
        return VINF_SUCCESS;
    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
    AssertMsgReturn(pThis->u32Magic == RTSEMEVENT_MAGIC, ("u32Magic=%RX32 pThis=%p\n", pThis->u32Magic, pThis), VERR_INVALID_HANDLE);
    Assert(pThis->cRefs > 0);
    RT_ASSERT_INTS_ON();

    mutex_enter(&pThis->Mtx);

    /*
     * Invalidate the semaphore.
     */
    ASMAtomicWriteU32(&pThis->u32Magic, ~RTSEMEVENT_MAGIC);
    ASMAtomicWriteBool(&pThis->fSignaled, false);

    /*
     * Abort and wake up all threads.
     */
    PRTSEMEVENTSOLENTRY pWaiter;
    RTListForEach(&pThis->WaitList, pWaiter, RTSEMEVENTSOLENTRY, Node)
    {
        pWaiter->fWokenUp = true;
    }
    cv_broadcast(&pThis->Cnd);

    /*
     * Release the reference from RTSemEventCreateEx.
     */
    mutex_exit(&pThis->Mtx);
    rtR0SemEventSolRelease(pThis);

    return VINF_SUCCESS;
}


RTDECL(int) RTSemEventSignal(RTSEMEVENT hEventSem)
{
    PRTSEMEVENTINTERNAL pThis = (PRTSEMEVENTINTERNAL)hEventSem;
    RT_ASSERT_PREEMPT_CPUID_VAR();
    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
    AssertMsgReturn(pThis->u32Magic == RTSEMEVENT_MAGIC, ("u32Magic=%RX32 pThis=%p\n", pThis->u32Magic, pThis), VERR_INVALID_HANDLE);
    RT_ASSERT_INTS_ON();

    rtR0SemEventSolRetain(pThis);
    rtR0SemSolWaitEnterMutexWithUnpinningHack(&pThis->Mtx);

    /*
     * Wake up one thread.
     */
    ASMAtomicWriteBool(&pThis->fSignaled, true);

    PRTSEMEVENTSOLENTRY pWaiter;
    RTListForEach(&pThis->WaitList, pWaiter, RTSEMEVENTSOLENTRY, Node)
    {
        if (!pWaiter->fWokenUp)
        {
            pWaiter->fWokenUp = true;
            setrun(pWaiter->pThread);
            ASMAtomicWriteBool(&pThis->fSignaled, false);
            break;
        }
    }

    mutex_exit(&pThis->Mtx);
    rtR0SemEventSolRelease(pThis);

    RT_ASSERT_PREEMPT_CPUID();
    return VINF_SUCCESS;
}


/**
 * Worker for RTSemEventWaitEx and RTSemEventWaitExDebug.
 *
 * @returns VBox status code.
 * @param   pThis           The event semaphore.
 * @param   fFlags          See RTSemEventWaitEx.
 * @param   uTimeout        See RTSemEventWaitEx.
 * @param   pSrcPos         The source code position of the wait.
 */
static int rtR0SemEventSolWait(PRTSEMEVENTINTERNAL pThis, uint32_t fFlags, uint64_t uTimeout,
                               PCRTLOCKVALSRCPOS pSrcPos)
{
    /*
     * Validate the input.
     */
    AssertPtrReturn(pThis, VERR_INVALID_PARAMETER);
    AssertMsgReturn(pThis->u32Magic == RTSEMEVENT_MAGIC, ("%p u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_PARAMETER);
    AssertReturn(RTSEMWAIT_FLAGS_ARE_VALID(fFlags), VERR_INVALID_PARAMETER);

    rtR0SemEventSolRetain(pThis);
    mutex_enter(&pThis->Mtx);

    /*
     * In the signaled state?
     */
    int rc;
    if (ASMAtomicCmpXchgBool(&pThis->fSignaled, false, true))
        rc = VINF_SUCCESS;
    else
    {
        /*
         * We have to wait.
         */
        RTR0SEMSOLWAIT Wait;
        rc = rtR0SemSolWaitInit(&Wait, fFlags, uTimeout);
        if (RT_SUCCESS(rc))
        {
            RTSEMEVENTSOLENTRY Waiter;  /* ASSUMES we won't get swapped out while waiting (TS_DONT_SWAP). */
            Waiter.pThread  = curthread;
            Waiter.fWokenUp = false;
            RTListAppend(&pThis->WaitList, &Waiter.Node);

            for (;;)
            {
                /* The destruction test. */
                if (RT_UNLIKELY(pThis->u32Magic != RTSEMEVENT_MAGIC))
                    rc = VERR_SEM_DESTROYED;
                else
                {
                    /* Check the exit conditions. */
                    if (RT_UNLIKELY(pThis->u32Magic != RTSEMEVENT_MAGIC))
                        rc = VERR_SEM_DESTROYED;
                    else if (Waiter.fWokenUp)
                        rc = VINF_SUCCESS;
                    else if (rtR0SemSolWaitHasTimedOut(&Wait))
                        rc = VERR_TIMEOUT;
                    else if (rtR0SemSolWaitWasInterrupted(&Wait))
                        rc = VERR_INTERRUPTED;
                    else
                    {
                        /* Do the wait and then recheck the conditions. */
                        rtR0SemSolWaitDoIt(&Wait, &pThis->Cnd, &pThis->Mtx);
                        continue;
                    }
                }
                break;
            }

            rtR0SemSolWaitDelete(&Wait);
            RTListNodeRemove(&Waiter.Node);
        }
    }

    mutex_exit(&pThis->Mtx);
    rtR0SemEventSolRelease(pThis);
    return rc;
}


RTDECL(int)  RTSemEventWaitEx(RTSEMEVENT hEventSem, uint32_t fFlags, uint64_t uTimeout)
{
#ifndef RTSEMEVENT_STRICT
    return rtR0SemEventSolWait(hEventSem, fFlags, uTimeout, NULL);
#else
    RTLOCKVALSRCPOS SrcPos = RTLOCKVALSRCPOS_INIT_NORMAL_API();
    return rtR0SemEventSolWait(hEventSem, fFlags, uTimeout, &SrcPos);
#endif
}


RTDECL(int)  RTSemEventWaitExDebug(RTSEMEVENT hEventSem, uint32_t fFlags, uint64_t uTimeout,
                                   RTHCUINTPTR uId, RT_SRC_POS_DECL)
{
    RTLOCKVALSRCPOS SrcPos = RTLOCKVALSRCPOS_INIT_DEBUG_API();
    return rtR0SemEventSolWait(hEventSem, fFlags, uTimeout, &SrcPos);
}


RTDECL(uint32_t) RTSemEventGetResolution(void)
{
    return rtR0SemSolWaitGetResolution();
}