Sample Code

Windows Driver Samples/ Toaster Sample Driver/ C++/ umdf/ func/ Queue.h/

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/*++
 
  Copyright (c) Microsoft Corporation, All Rights Reserved
 
  Module Name:
 
    Queue.h
 
  Abstract:
 
    This file contains the class definition for the queue
    callback object.
 
  Environment:
 
    Windows User-Mode Driver Framework (WUDF)
 
--*/
 
#pragma once
#include "WUDFToaster.h"
 
class CQueue : 
    public IQueueCallbackDeviceIoControl,
    public IQueueCallbackRead,
    public IQueueCallbackWrite
{
    public:
 
        CQueue() : m_cRefs(0)
        {
        }
 
    public:
 
        //
        // Static method that creates a queue callback object.
        //       
        static HRESULT CreateInstance(_Out_ IUnknown **ppUkwn)
        {
            *ppUkwn = NULL;
                 
#pragma warning( suppress : 6014 )// PFD ISSUE: counted memory locks
            CQueue *pMyQueue = new CQueue();
             
            if (NULL == pMyQueue)
            {
                return E_OUTOFMEMORY;
            }
            return (pMyQueue->QueryInterface(__uuidof(IUnknown), (void **)ppUkwn ));
        }
         
        //
        // IUnknown
        //
        virtual HRESULT __stdcall QueryInterface(_In_ REFIID riid, _Out_ LPVOID* ppvObject);
        virtual ULONG   __stdcall AddRef();
        _At_(this, __drv_freesMem(object))
        virtual ULONG   __stdcall Release();
 
        //
        // IQueueCallbackDeviceIoControl
        //       
        virtual void __stdcall OnDeviceIoControl(
            _In_ IWDFIoQueue*    pQueue,
            _In_ IWDFIoRequest*  pRequest,
            _In_ ULONG           ControlCode,   
            _In_ SIZE_T          InputBufferSizeInBytes,
            _In_ SIZE_T          OutputBufferSizeInBytes
            );
 
        //
        // IQueueCallbackRead
        //
        virtual void __stdcall OnRead(
             _In_ IWDFIoQueue *pWdfQueue,
             _In_ IWDFIoRequest *pWdfRequest,
             _In_ SIZE_T NumOfBytesToRead
            );
 
        //
        // IQueueCallbackWrite
        //
        virtual void __stdcall OnWrite(
            _In_ IWDFIoQueue *pWdfQueue,
            _In_ IWDFIoRequest *pWdfRequest,
            _In_ SIZE_T NumOfBytesToWrite
            );
 
       //
       // TODO: Add your interfaces here
       //
 
    private:
        LONG    m_cRefs;
};

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