C++ RTErrConvertFromErrno函数代码示例

RTDECL(int) RTFileAioReqGetRC(RTFILEAIOREQ hReq, size_t *pcbTransfered)
{
    PRTFILEAIOREQINTERNAL pReqInt = hReq;
    RTFILEAIOREQ_VALID_RETURN(pReqInt);
    RTFILEAIOREQ_NOT_STATE_RETURN_RC(pReqInt, SUBMITTED, VERR_FILE_AIO_IN_PROGRESS);
    RTFILEAIOREQ_NOT_STATE_RETURN_RC(pReqInt, PREPARED, VERR_FILE_AIO_NOT_SUBMITTED);
    AssertPtrNull(pcbTransfered);

    int rcSol = aio_error(&pReqInt->AioCB);
    Assert(rcSol != EINPROGRESS); /* Handled by our own state handling. */

    if (rcSol == 0)
    {
        if (pcbTransfered)
            *pcbTransfered = aio_return(&pReqInt->AioCB);
        return VINF_SUCCESS;
    }

    /* An error occurred. */
    return RTErrConvertFromErrno(rcSol);
}

/**
 * Rewinds the stream.
 *
 * Stream errors will be reset on success.
 *
 * @returns IPRT status code.
 *
 * @param   pStream         The stream.
 *
 * @remarks Not all streams are rewindable and that behavior is currently
 *          undefined for those.
 */
RTR3DECL(int) RTStrmRewind(PRTSTREAM pStream)
{
    AssertPtrReturn(pStream, VERR_INVALID_HANDLE);
    AssertReturn(pStream->u32Magic == RTSTREAM_MAGIC, VERR_INVALID_HANDLE);

    int rc;
    clearerr(pStream->pFile);
    errno = 0;
    if (!fseek(pStream->pFile, 0, SEEK_SET))
    {
        ASMAtomicWriteS32(&pStream->i32Error, VINF_SUCCESS);
        rc = VINF_SUCCESS;
    }
    else
    {
        rc = RTErrConvertFromErrno(errno);
        ASMAtomicWriteS32(&pStream->i32Error, rc);
    }

    return rc;
}

RTR3DECL(int) RTThreadSetAffinity(PCRTCPUSET pCpuSet)
{
    /* convert */
    cpu_set_t LnxCpuSet;
    CPU_ZERO(&LnxCpuSet);
    if (!pCpuSet)
        for (unsigned iCpu = 0; iCpu < CPU_SETSIZE; iCpu++)
            CPU_SET(iCpu, &LnxCpuSet);
    else
        for (unsigned iCpu = 0; iCpu < RT_MIN(CPU_SETSIZE, RTCPUSET_MAX_CPUS); iCpu++)
            if (RTCpuSetIsMemberByIndex(pCpuSet, iCpu))
                CPU_SET(iCpu, &LnxCpuSet);

    int rc = pthread_setaffinity_np(pthread_self(), sizeof(LnxCpuSet), &LnxCpuSet);
    if (!rc)
        return VINF_SUCCESS;
    rc = errno;
    if (rc == ENOENT)
        return VERR_CPU_NOT_FOUND;
    return RTErrConvertFromErrno(errno);
}

/**
 * @interface_method_impl{PDMIBASE,pfnRead}
 */
static DECLCALLBACK(int) drvHostParallelRead(PPDMIHOSTPARALLELCONNECTOR pInterface, void *pvBuf, size_t cbRead, PDMPARALLELPORTMODE enmMode)
{
    PDRVHOSTPARALLEL    pThis   = RT_FROM_MEMBER(pInterface, DRVHOSTPARALLEL, CTX_SUFF(IHostParallelConnector));
    int rc = VINF_SUCCESS;

# ifndef VBOX_WITH_WIN_PARPORT_SUP
    int rcLnx = 0;
    LogFlowFunc(("pvBuf=%#p cbRead=%d\n", pvBuf, cbRead));

    rc = drvHostParallelSetMode(pThis, enmMode);
    if (RT_FAILURE(rc))
        return rc;

    if (enmMode == PDM_PARALLEL_PORT_MODE_SPP)
    {
        /* Set the data lines directly. */
        rcLnx = ioctl(RTFileToNative(pThis->hFileDevice), PPWDATA, pvBuf);
    }
    else
    {
        /* Use write interface. */
        rcLnx = read(RTFileToNative(pThis->hFileDevice), pvBuf, cbRead);
    }
    if (RT_UNLIKELY(rcLnx < 0))
        rc = RTErrConvertFromErrno(errno);
# else  /* VBOX_WITH_WIN_PARPORT_SUP */
    if (pThis->fParportAvail)
    {
        *((uint8_t*)(pvBuf)) = 0; /* Initialize the buffer. */
        for (size_t i = 0; i < cbRead; i++)
        {
            LogFlowFunc(("calling R0 to read from parallel port\n"));
            int rc = PDMDrvHlpCallR0(pThis->CTX_SUFF(pDrvIns), DRVHOSTPARALLELR0OP_READ, 0);
            AssertRC(rc);
            *((uint8_t *)pvBuf + i) = (uint8_t)pThis->u8ReadIn;
        }
    }
# endif /* VBOX_WITH_WIN_PARPORT_SUP */
    return rc;
}

/**
 * Changes the current mode of the host parallel port.
 *
 * @returns VBox status code.
 * @param   pThis    The host parallel port instance data.
 * @param   enmMode  The mode to change the port to.
 */
static int drvHostParallelSetMode(PDRVHOSTPARALLEL pThis, PDMPARALLELPORTMODE enmMode)
{
    int iMode = 0;
    int rc = VINF_SUCCESS;
    LogFlowFunc(("mode=%d\n", enmMode));

# ifndef VBOX_WITH_WIN_PARPORT_SUP
    int rcLnx;
    if (pThis->enmModeCur != enmMode)
    {
        switch (enmMode)
        {
            case PDM_PARALLEL_PORT_MODE_SPP:
                iMode = IEEE1284_MODE_COMPAT;
                break;
            case PDM_PARALLEL_PORT_MODE_EPP_DATA:
                iMode = IEEE1284_MODE_EPP | IEEE1284_DATA;
                break;
            case PDM_PARALLEL_PORT_MODE_EPP_ADDR:
                iMode = IEEE1284_MODE_EPP | IEEE1284_ADDR;
                break;
            case PDM_PARALLEL_PORT_MODE_ECP:
            case PDM_PARALLEL_PORT_MODE_INVALID:
            default:
                return VERR_NOT_SUPPORTED;
        }

        rcLnx = ioctl(RTFileToNative(pThis->hFileDevice), PPSETMODE, &iMode);
        if (RT_UNLIKELY(rcLnx < 0))
            rc = RTErrConvertFromErrno(errno);
        else
            pThis->enmModeCur = enmMode;
    }

    return rc;
# else  /* VBOX_WITH_WIN_PARPORT_SUP */
    return VINF_SUCCESS;
# endif /* VBOX_WITH_WIN_PARPORT_SUP */
}

RTR3DECL(int) RTFsQueryProperties(const char *pszFsPath, PRTFSPROPERTIES pProperties)
{
    /*
     * Validate.
     */
    AssertMsgReturn(VALID_PTR(pszFsPath) && *pszFsPath, ("%p", pszFsPath), VERR_INVALID_PARAMETER);
    AssertMsgReturn(VALID_PTR(pProperties), ("%p", pProperties), VERR_INVALID_PARAMETER);

    /*
     * Convert the path and query the information.
     */
    char const *pszNativeFsPath;
    int rc = rtPathToNative(&pszNativeFsPath, pszFsPath, NULL);
    if (RT_SUCCESS(rc))
    {
        struct statvfs StatVFS;
        RT_ZERO(StatVFS);
        if (!statvfs(pszNativeFsPath, &StatVFS))
        {
            /*
             * Calc/fake the returned values.
             */
            pProperties->cbMaxComponent = StatVFS.f_namemax;
            pProperties->fCaseSensitive = true;
            pProperties->fCompressed = false;
            pProperties->fFileCompression = false;
            pProperties->fReadOnly = !!(StatVFS.f_flag & ST_RDONLY);
            pProperties->fRemote = false;
            pProperties->fSupportsUnicode = true;
        }
        else
            rc = RTErrConvertFromErrno(errno);
        rtPathFreeNative(pszNativeFsPath, pszFsPath);
    }

    LogFlow(("RTFsQueryProperties(%p:{%s}, %p:{.cbMaxComponent=%u, .fCaseSensitive=%RTbool}): returns %Rrc\n",
             pszFsPath, pszFsPath, pProperties, pProperties->cbMaxComponent, pProperties->fReadOnly));
    return VINF_SUCCESS;
}

RTDECL(int) RTFileAioReqCancel(RTFILEAIOREQ hReq)
{
    PRTFILEAIOREQINTERNAL pReqInt = hReq;
    RTFILEAIOREQ_VALID_RETURN(pReqInt);
    RTFILEAIOREQ_STATE_RETURN_RC(pReqInt, SUBMITTED, VERR_FILE_AIO_NOT_SUBMITTED);

    ASMAtomicXchgBool(&pReqInt->fCanceled, true);

    int rcPosix = aio_cancel(pReqInt->AioCB.aio_fildes, &pReqInt->AioCB);

    if (rcPosix == AIO_CANCELED)
    {
        PRTFILEAIOCTXINTERNAL pCtxInt = pReqInt->pCtxInt;
        /*
         * Notify the waiting thread that the request was canceled.
         */
        AssertMsg(VALID_PTR(pCtxInt),
                  ("Invalid state. Request was canceled but wasn't submitted\n"));

        Assert(!pCtxInt->pReqToCancel);
        ASMAtomicWritePtr(&pCtxInt->pReqToCancel, pReqInt);
        rtFileAioCtxWakeup(pCtxInt);

        /* Wait for acknowledge. */
        int rc = RTSemEventWait(pCtxInt->SemEventCancel, RT_INDEFINITE_WAIT);
        AssertRC(rc);

        ASMAtomicWriteNullPtr(&pCtxInt->pReqToCancel);
        pReqInt->Rc = VERR_FILE_AIO_CANCELED;
        RTFILEAIOREQ_SET_STATE(pReqInt, COMPLETED);
        return VINF_SUCCESS;
    }
    else if (rcPosix == AIO_ALLDONE)
        return VERR_FILE_AIO_COMPLETED;
    else if (rcPosix == AIO_NOTCANCELED)
        return VERR_FILE_AIO_IN_PROGRESS;
    else
        return RTErrConvertFromErrno(errno);
}

RTDECL(int) RTEnvSetBad(const char *pszVar, const char *pszValue)
{
    AssertMsgReturn(strchr(pszVar, '=') == NULL, ("'%s'\n", pszVar), VERR_ENV_INVALID_VAR_NAME);

    /* make a local copy and feed it to putenv. */
    const size_t cchVar = strlen(pszVar);
    const size_t cchValue = strlen(pszValue);
    char *pszTmp = (char *)alloca(cchVar + cchValue + 2 + !*pszValue);
    memcpy(pszTmp, pszVar, cchVar);
    pszTmp[cchVar] = '=';
    if (*pszValue)
        memcpy(pszTmp + cchVar + 1, pszValue, cchValue + 1);
    else
    {
        pszTmp[cchVar + 1] = ' '; /* wrong, but putenv will remove it otherwise. */
        pszTmp[cchVar + 2] = '\0';
    }

    if (!putenv(pszTmp))
        return 0;
    return RTErrConvertFromErrno(errno);
}

/**
 * interface_method_impl{SUPDRVTRACERREG,pfnProviderRegister}
 */
static DECLCALLBACK(int) vboxDtTOps_ProviderRegister(PCSUPDRVTRACERREG pThis, PSUPDRVVDTPROVIDERCORE pCore)
{
    LOG_DTRACE(("%s: %p %s/%s\n", __FUNCTION__, pThis, pCore->pszModName, pCore->pszName));
    AssertReturn(pCore->TracerData.DTrace.idProvider == 0, VERR_INTERNAL_ERROR_3);

    PVTGDESCPROVIDER    pDesc = pCore->pDesc;
    dtrace_pattr_t      DtAttrs;
    vboxDtVtgConvAttr(&DtAttrs.dtpa_provider, &pDesc->AttrSelf);
    vboxDtVtgConvAttr(&DtAttrs.dtpa_mod,      &pDesc->AttrModules);
    vboxDtVtgConvAttr(&DtAttrs.dtpa_func,     &pDesc->AttrFunctions);
    vboxDtVtgConvAttr(&DtAttrs.dtpa_name,     &pDesc->AttrNames);
    vboxDtVtgConvAttr(&DtAttrs.dtpa_args,     &pDesc->AttrArguments);

    /* Note! DTrace may call us back before dtrace_register returns, so we
             have to point it to pCore->TracerData.DTrace.idProvider. */
    AssertCompile(sizeof(dtrace_provider_id_t) == sizeof(pCore->TracerData.DTrace.idProvider));
    int rc = dtrace_register(pCore->pszName,
                             &DtAttrs,
                             DTRACE_PRIV_KERNEL,
                             NULL /* cred */,
                             &g_vboxDtVtgProvOps,
                             pCore,
                             &pCore->TracerData.DTrace.idProvider);
    if (!rc)
    {
        LOG_DTRACE(("%s: idProvider=%p\n", __FUNCTION__, pCore->TracerData.DTrace.idProvider));
        AssertPtr(pCore->TracerData.DTrace.idProvider);
        rc = VINF_SUCCESS;
    }
    else
    {
        pCore->TracerData.DTrace.idProvider = 0;
        rc = RTErrConvertFromErrno(FIX_UEK_RC(rc));
    }

    LOG_DTRACE(("%s: returns %Rrc\n", __FUNCTION__, rc));
    return rc;
}

RTDECL(int) RTThreadSleep(RTMSINTERVAL cMillies)
{
    LogFlow(("RTThreadSleep: cMillies=%d\n", cMillies));
    if (!cMillies)
    {
        /* pthread_yield() isn't part of SuS, thus this fun. */
#ifdef RT_OS_DARWIN
        pthread_yield_np();
#elif defined(RT_OS_FREEBSD) /* void pthread_yield */
        pthread_yield();
#elif defined(RT_OS_SOLARIS) || defined(RT_OS_HAIKU)
        sched_yield();
#else
        if (!pthread_yield())
#endif
        {
            LogFlow(("RTThreadSleep: returning %Rrc (cMillies=%d)\n", VINF_SUCCESS, cMillies));
            return VINF_SUCCESS;
        }
    }
    else
    {
        struct timespec ts;
        struct timespec tsrem = {0,0};

        ts.tv_nsec = (cMillies % 1000) * 1000000;
        ts.tv_sec  = cMillies / 1000;
        if (!nanosleep(&ts, &tsrem))
        {
            LogFlow(("RTThreadSleep: returning %Rrc (cMillies=%d)\n", VINF_SUCCESS, cMillies));
            return VINF_SUCCESS;
        }
    }

    int rc = RTErrConvertFromErrno(errno);
    LogFlow(("RTThreadSleep: returning %Rrc (cMillies=%d)\n", rc, cMillies));
    return rc;
}

RTR3DECL(int) RTFileSetTimes(RTFILE hFile, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime,
                             PCRTTIMESPEC pChangeTime, PCRTTIMESPEC pBirthTime)
{
    /*
     * We can only set AccessTime and ModificationTime, so if neither
     * are specified we can return immediately.
     */
    if (!pAccessTime && !pModificationTime)
        return VINF_SUCCESS;

    /*
     * Convert the input to timeval, getting the missing one if necessary,
     * and call the API which does the change.
     */
    struct timeval aTimevals[2];
    if (pAccessTime && pModificationTime)
    {
        RTTimeSpecGetTimeval(pAccessTime,       &aTimevals[0]);
        RTTimeSpecGetTimeval(pModificationTime, &aTimevals[1]);
    }
    else
    {
        RTFSOBJINFO ObjInfo;
        int rc = RTFileQueryInfo(hFile, &ObjInfo, RTFSOBJATTRADD_UNIX);
        if (RT_FAILURE(rc))
            return rc;
        RTTimeSpecGetTimeval(pAccessTime        ? pAccessTime       : &ObjInfo.AccessTime,       &aTimevals[0]);
        RTTimeSpecGetTimeval(pModificationTime  ? pModificationTime : &ObjInfo.ModificationTime, &aTimevals[1]);
    }

    if (futimes(RTFileToNative(hFile), aTimevals))
    {
        int rc = RTErrConvertFromErrno(errno);
        Log(("RTFileSetTimes(%RTfile,%p,%p,,): returns %Rrc\n", hFile, pAccessTime, pModificationTime, rc));
        return rc;
    }
    return VINF_SUCCESS;
}

DECLHIDDEN(int) rtThreadNativeCreate(PRTTHREADINT pThread, PRTNATIVETHREAD pNativeThread)
{
    /*
     * Default stack size.
     */
    if (!pThread->cbStack)
        pThread->cbStack = 512*1024;

    /*
     * Create the thread.
     */
    int iThreadId = _beginthread(rtThreadNativeMain, NULL, pThread->cbStack, pThread);
    if (iThreadId > 0)
    {
#ifdef fibGetTidPid
        *pNativeThread = iThreadId | (fibGetPid() << 16);
#else
        *pNativeThread = iThreadId;
#endif
        return VINF_SUCCESS;
    }
    return RTErrConvertFromErrno(errno);
}

RTR3DECL(int) RTFileQueryFsSizes(RTFILE hFile, PRTFOFF pcbTotal, RTFOFF *pcbFree,
                                 uint32_t *pcbBlock, uint32_t *pcbSector)
{
    struct statvfs StatVFS;
    RT_ZERO(StatVFS);
    if (fstatvfs(RTFileToNative(hFile), &StatVFS))
        return RTErrConvertFromErrno(errno);

    /*
     * Calc the returned values.
     */
    if (pcbTotal)
        *pcbTotal = (RTFOFF)StatVFS.f_blocks * StatVFS.f_frsize;
    if (pcbFree)
        *pcbFree = (RTFOFF)StatVFS.f_bavail * StatVFS.f_frsize;
    if (pcbBlock)
        *pcbBlock = StatVFS.f_frsize;
    /* no idea how to get the sector... */
    if (pcbSector)
        *pcbSector = 512;

    return VINF_SUCCESS;
}

RTDECL(int) RTKrnlModLoadedQueryInfo(const char *pszName, PRTKRNLMODINFO phKrnlModInfo)
{
    AssertPtrReturn(pszName, VERR_INVALID_POINTER);
    AssertPtrReturn(phKrnlModInfo, VERR_INVALID_POINTER);

    int rc = VERR_NOT_FOUND;
    int iId = -1;
    struct modinfo ModInfo;

    ModInfo.mi_info   = MI_INFO_ALL | MI_INFO_CNT;
    ModInfo.mi_id     = iId;
    ModInfo.mi_nextid = iId;
    do
    {
        int rcSol = modctl(MODINFO, iId, &ModInfo);
        if (rcSol < 0)
        {
            rc = RTErrConvertFromErrno(errno);
            break;
        }

        if (ModInfo.mi_id != -1)
        {
            ModInfo.mi_name[MODMAXNAMELEN - 1] = '\0'; /* Paranoia. */
            if (!RTStrCmp(pszName, &ModInfo.mi_name[0]))
            {
                rc = rtKrnlModSolInfoCreate(&ModInfo, phKrnlModInfo);
                break;
            }
        }

        iId = ModInfo.mi_id;
    } while (iId != -1);

    return rc;
}

//.........这里部分代码省略.........
        ts.tv_nsec = (cMillies % 1000) * UINT32_C(1000000);
        u64End = RTTimeSystemNanoTS() + cMillies * UINT64_C(1000000);
        pTimeout = &ts;
    }

    /*
     * Lock the mutex.
     * Optimize for the uncontended case (makes 1-2 ns difference).
     */
    if (RT_UNLIKELY(!ASMAtomicCmpXchgS32(&pThis->iState, 1, 0)))
    {
        for (;;)
        {
            int32_t iOld = ASMAtomicXchgS32(&pThis->iState, 2);

            /*
             * Was the lock released in the meantime? This is unlikely (but possible)
             */
            if (RT_UNLIKELY(iOld == 0))
                break;

            /*
             * Go to sleep.
             */
            if (pTimeout && ( pTimeout->tv_sec || pTimeout->tv_nsec ))
            {
#ifdef RTSEMMUTEX_STRICT
                int rc9 = RTLockValidatorRecExclCheckBlocking(&pThis->ValidatorRec, hThreadSelf, pSrcPos, true,
                          cMillies, RTTHREADSTATE_MUTEX, true);
                if (RT_FAILURE(rc9))
                    return rc9;
#else
                RTThreadBlocking(hThreadSelf, RTTHREADSTATE_MUTEX, true);
#endif
            }

            long rc = sys_futex(&pThis->iState, FUTEX_WAIT, 2, pTimeout, NULL, 0);

            RTThreadUnblocked(hThreadSelf, RTTHREADSTATE_MUTEX);
            if (RT_UNLIKELY(pThis->u32Magic != RTSEMMUTEX_MAGIC))
                return VERR_SEM_DESTROYED;

            /*
             * Act on the wakup code.
             */
            if (rc == -ETIMEDOUT)
            {
                Assert(pTimeout);
                return VERR_TIMEOUT;
            }
            if (rc == 0)
                /* we'll leave the loop now unless another thread is faster */;
            else if (rc == -EWOULDBLOCK)
                /* retry with new value. */;
            else if (rc == -EINTR)
            {
                if (!fAutoResume)
                    return VERR_INTERRUPTED;
            }
            else
            {
                /* this shouldn't happen! */
                AssertMsgFailed(("rc=%ld errno=%d\n", rc, errno));
                return RTErrConvertFromErrno(rc);
            }

            /* adjust the relative timeout */
            if (pTimeout)
            {
                int64_t i64Diff = u64End - RTTimeSystemNanoTS();
                if (i64Diff < 1000)
                {
                    rc = VERR_TIMEOUT;
                    break;
                }
                ts.tv_sec  = (uint64_t)i64Diff / UINT32_C(1000000000);
                ts.tv_nsec = (uint64_t)i64Diff % UINT32_C(1000000000);
            }
        }

        /*
         * When leaving this loop, iState is set to 2. This means that we gained the
         * lock and there are _possibly_ some waiters. We don't know exactly as another
         * thread might entered this loop at nearly the same time. Therefore we will
         * call futex_wakeup once too often (if _no_ other thread entered this loop).
         * The key problem is the simple futex_wait test for x != y (iState != 2) in
         * our case).
         */
    }

    /*
     * Set the owner and nesting.
     */
    pThis->Owner = Self;
    ASMAtomicWriteU32(&pThis->cNestings, 1);
#ifdef RTSEMMUTEX_STRICT
    RTLockValidatorRecExclSetOwner(&pThis->ValidatorRec, hThreadSelf, pSrcPos, true);
#endif
    return VINF_SUCCESS;
}