isochapi.c

winddk src目录下的WDM源码压缩!

                         &dwBytesRet,
                         &overLapped);

        dwRet = GetLastError();

        if ((dwRet != ERROR_SUCCESS) && (dwRet != ERROR_IO_PENDING)) {

            TRACE(TL_ERROR, (hWnd, "IsochAttachBuffers Failed = %d\r\n", dwRet));
        }
        else {

            // we got a pending, so we need to wait...
            if (dwRet == ERROR_IO_PENDING) {

                if (!GetOverlappedResult(hDevice, &overLapped, &dwBytesRet, TRUE)) {

                    // getoverlappedresult failed, lets find out why...
                    dwRet = GetLastError();
                    TRACE(TL_ERROR, (hWnd, "IsochAttachBuffers: GetOverlappedResult Failed! dwRet = %d\r\n", dwRet));

                }
            }
        }

        // free up resources
        CloseHandle(hDevice);
    }
    else {

        dwRet = GetLastError();
        TRACE(TL_ERROR, (hWnd, "Error = 0x%x\r\n", dwRet));        
    }

Exit_IsochAttachBuffers:
    
    TRACE(TL_TRACE, (hWnd, "pIsochDescriptor = 0x%x\r\n", pIsochAttachBuffers->pIsochDescriptor));
    TRACE(TL_TRACE, (hWnd, "Exit IsochAttachBuffers\r\n"));
    return(dwRet);
} // IsochAttachBuffers

ULONG
WINAPI
IsochDetachBuffers(
    HWND                        hWnd,
    PSTR                        szDeviceName,
    PISOCH_DETACH_BUFFERS       isochDetachBuffers
    )
{
    HANDLE      hDevice;
    DWORD       dwRet, dwBytesRet;

    TRACE(TL_TRACE, (hWnd, "Enter IsochDetachBuffers\r\n"));

    TRACE(TL_TRACE, (hWnd, "hResource = %p\r\n", isochDetachBuffers->hResource));
    TRACE(TL_TRACE, (hWnd, "nNumberOfDescriptors = 0x%x\r\n", isochDetachBuffers->nNumberOfDescriptors));
    TRACE(TL_TRACE, (hWnd, "pIsochDescriptor = 0x%x\r\n", isochDetachBuffers->pIsochDescriptor));

    hDevice = OpenDevice(hWnd, szDeviceName, FALSE);

    if (hDevice != INVALID_HANDLE_VALUE) {

        dwRet = DeviceIoControl( hDevice,
                                 IOCTL_ISOCH_DETACH_BUFFERS,
                                 isochDetachBuffers,
                                 sizeof(ISOCH_DETACH_BUFFERS),
                                 NULL,
                                 0,
                                 &dwBytesRet,
                                 NULL
                                 );

        if (!dwRet) {

            dwRet = GetLastError();
            TRACE(TL_ERROR, (hWnd, "Error = 0x%x\r\n", dwRet));
        }
        else {

            dwRet = ERROR_SUCCESS;
        }

        // free up resources
        CloseHandle(hDevice);
    }
    else {

        dwRet = GetLastError();
        TRACE(TL_ERROR, (hWnd, "Error = 0x%x\r\n", dwRet));        
    }
    
    TRACE(TL_TRACE, (hWnd, "Exit IsochDetachBuffers = %d\r\n", dwRet));
    return(dwRet);
} // IsochDetachBuffers

ULONG
WINAPI
IsochFreeBandwidth(
    HWND    hWnd,
    PSTR    szDeviceName,
    HANDLE  hBandwidth
    )
{
    HANDLE      hDevice;
    DWORD       dwRet, dwBytesRet;

    TRACE(TL_TRACE, (hWnd, "Enter IsochFreeBandwidth\r\n"));

    TRACE(TL_TRACE, (hWnd, "hBandwidth = 0x%x\r\n", hBandwidth));

    hDevice = OpenDevice(hWnd, szDeviceName, FALSE);

    if (hDevice != INVALID_HANDLE_VALUE) {

        dwRet = DeviceIoControl( hDevice,
                                 IOCTL_ISOCH_FREE_BANDWIDTH,
                                 &hBandwidth,
                                 sizeof(HANDLE),
                                 NULL,
                                 0,
                                 &dwBytesRet,
                                 NULL
                                 );

        if (!dwRet) {

            dwRet = GetLastError();
            TRACE(TL_ERROR, (hWnd, "Error = 0x%x\r\n", dwRet));
        }
        else {

            dwRet = ERROR_SUCCESS;
        }

        // free up resources
        CloseHandle(hDevice);
    }
    else {

        dwRet = GetLastError();
        TRACE(TL_ERROR, (hWnd, "Error = 0x%x\r\n", dwRet));        
    }
    
    TRACE(TL_TRACE, (hWnd, "Exit IsochFreeBandwidth = %d\r\n", dwRet));
    return(dwRet);
} // IsochFreeBandwidth

ULONG
WINAPI
IsochFreeChannel(
    HWND    hWnd,
    PSTR    szDeviceName,
    ULONG   nChannel
    )
{
    HANDLE      hDevice;
    DWORD       dwRet, dwBytesRet;

    TRACE(TL_TRACE, (hWnd, "Enter IsochFreeChannel\r\n"));

    TRACE(TL_TRACE, (hWnd, "nChannel = 0x%x\r\n", nChannel));

    hDevice = OpenDevice(hWnd, szDeviceName, FALSE);

    if (hDevice != INVALID_HANDLE_VALUE) {

        dwRet = DeviceIoControl( hDevice,
                                 IOCTL_ISOCH_FREE_CHANNEL,
                                 &nChannel,
                                 sizeof(ULONG),
                                 NULL,
                                 0,
                                 &dwBytesRet,
                                 NULL
                                 );

        if (!dwRet) {

            dwRet = GetLastError();
            TRACE(TL_ERROR, (hWnd, "Error = 0x%x\r\n", dwRet));
        }
        else {

            dwRet = ERROR_SUCCESS;
        }

        // free up resources
        CloseHandle(hDevice);
    }
    else {

        dwRet = GetLastError();
        TRACE(TL_ERROR, (hWnd, "Error = 0x%x\r\n", dwRet));        
    }
    
    TRACE(TL_TRACE, (hWnd, "Exit IsochFreeChannel = %d\r\n", dwRet));
    return(dwRet);
} // IsochFreeChannel

ULONG
WINAPI
IsochFreeResources(
    HWND    hWnd,
    PSTR    szDeviceName,
    HANDLE  hResource
    )
{
    HANDLE      hDevice;
    DWORD       dwRet, dwBytesRet;

    TRACE(TL_TRACE, (hWnd, "Enter IsochFreeResources\r\n"));

    TRACE(TL_TRACE, (hWnd, "hResource = %p\r\n", hResource));

    hDevice = OpenDevice(hWnd, szDeviceName, FALSE);

    if (hDevice != INVALID_HANDLE_VALUE) {

        dwRet = DeviceIoControl( hDevice,
                                 IOCTL_ISOCH_FREE_RESOURCES,
                                 &hResource,
                                 sizeof(HANDLE),
                                 NULL,
                                 0,
                                 &dwBytesRet,
                                 NULL
                                 );

        if (!dwRet) {

            dwRet = GetLastError();
            TRACE(TL_ERROR, (hWnd, "Error = 0x%x\r\n", dwRet));
        }
        else {

            dwRet = ERROR_SUCCESS;
        }

        // free up resources
        CloseHandle(hDevice);
    }
    else {

        dwRet = GetLastError();
        TRACE(TL_ERROR, (hWnd, "Error = 0x%x\r\n", dwRet));        
    }
    
    TRACE(TL_TRACE, (hWnd, "Exit IsochFreeResources = %d\r\n", dwRet));
    return(dwRet);
} // IsochFreeResources

ULONG
WINAPI
IsochListen(
    HWND            hWnd,
    PSTR            szDeviceName,
    PISOCH_LISTEN   isochListen
    )
{
    HANDLE      hDevice;
    DWORD       dwRet, dwBytesRet;

    TRACE(TL_TRACE, (hWnd, "Enter IsochListen\r\n"));

    TRACE(TL_TRACE, (hWnd, "hResource = %p\r\n", isochListen->hResource));
    TRACE(TL_TRACE, (hWnd, "fulFlags = 0x%x\r\n", isochListen->fulFlags));
    TRACE(TL_TRACE, (hWnd, "StartTime.CL_CycleOffset = 0x%x\r\n", isochListen->StartTime.CL_CycleOffset));
    TRACE(TL_TRACE, (hWnd, "StartTime.CL_CycleCount = 0x%x\r\n", isochListen->StartTime.CL_CycleCount));
    TRACE(TL_TRACE, (hWnd, "StartTime.CL_SecondCount = 0x%x\r\n", isochListen->StartTime.CL_SecondCount));

    hDevice = OpenDevice(hWnd, szDeviceName, FALSE);

    if (hDevice != INVALID_HANDLE_VALUE) {

        dwRet = DeviceIoControl( hDevice,
                                 IOCTL_ISOCH_LISTEN,
                                 isochListen,
                                 sizeof(ISOCH_LISTEN),
                                 NULL,
                                 0,
                                 &dwBytesRet,
                                 NULL
                                 );

        if (!dwRet) {

            dwRet = GetLastError();
            TRACE(TL_ERROR, (hWnd, "Error = 0x%x\r\n", dwRet));
        }
        else {

            dwRet = ERROR_SUCCESS;
        }

        // free up resources
        CloseHandle(hDevice);
    }
    else {

        dwRet = GetLastError();
        TRACE(TL_ERROR, (hWnd, "Error = 0x%x\r\n", dwRet));        
    }
    
    TRACE(TL_TRACE, (hWnd, "Exit IsochListen = %d\r\n", dwRet));
    return(dwRet);
} // IsochListen

ULONG
WINAPI
IsochQueryCurrentCycleTime(
    HWND            hWnd,
    PSTR            szDeviceName,
    PCYCLE_TIME     CycleTime
    )
{
    HANDLE      hDevice;
    DWORD       dwRet, dwBytesRet;

    TRACE(TL_TRACE, (hWnd, "Enter IsochQueryCurrentCycleTime\r\n"));

    hDevice = OpenDevice(hWnd, szDeviceName, FALSE);

    if (hDevice != INVALID_HANDLE_VALUE) {

        dwRet = DeviceIoControl( hDevice,
                                 IOCTL_ISOCH_QUERY_CURRENT_CYCLE_TIME,
                                 NULL,
                                 0,
                                 CycleTime,
                                 sizeof(CYCLE_TIME),
                                 &dwBytesRet,
                                 NULL
                                 );

        if (dwRet) {

            dwRet = ERROR_SUCCESS;

            TRACE(TL_TRACE, (hWnd, "CycleTime.CL_CycleOffset = 0x%x\r\n", CycleTime->CL_CycleOffset));
            TRACE(TL_TRACE, (hWnd, "CycleTime.CL_CycleCount = 0x%x\r\n", CycleTime->CL_CycleCount));
            TRACE(TL_TRACE, (hWnd, "CycleTime.CL_SecondCount = 0x%x\r\n", CycleTime->CL_SecondCount));
        }
        else {

            dwRet = GetLastError();
            TRACE(TL_ERROR, (hWnd, "Error = 0x%x\r\n", dwRet));
        }