Handle to an event set to the signaled state when the operation has been completed. The calling process must set this member either to zero or a valid event handle before calling any overlapped functions. To create an event object, use the CreateEvent function. ...
ULONG_PTR CompletionKey;//完成Key OVERLAPPED*pOverlapped;//OVERLAPPED结构指针 //hIOCP是一个I/O完成端口对象句柄,在其他地方被创建 BOOL bOk=GetQueuedCompletionStatus(hIOCP, &dwNumBytes,&CompletionKey,&pOverlapped,1000); DWORD dwError=GetLastError();//取得错误码 if(bOk) { //等待成功,一个I/O请求...
当设备驱动准备处理你的I/O请求的时候,它将数据传送到pvBuffer参数对应的地址上去,并访问OVERLAPPED结构中的Offset等成员。当I/O请求完成之后,设备驱动更新OVERLAPPED结果中的Internal和InternalHigh成员。因此,不能在I/O请求完成之前移动或释放数据缓冲区和OVERLAPPED结构,否则,内存数据会被破坏,而且在每次调用ReadFile或W...
CDrawPort *pdp = pPerspectiveView->m_pdpDrawPort; pdp->SetOverlappedRendering(FALSE);// we are not rendering scene over already rendered scene (used for CSG layer)// if full screen mode is requiredHWND hWndFullScreen=NULL; HINSTANCE hInstanceFullScreen; WNDCLASSEX wcFullScreen;charachWindowTitle...
雖然您可以指定 VIRTUAL_DISK_ACCESS_ALL,這通常是不希望發生,它可防止您執行某些作業如查詢虛擬的磁碟做為儲存裝置目前連接。 其他非常有用的功能都是能夠指定的 OVERLAPPED 結構。 這支援虛擬磁碟 API 函式,數,而且如您所預期的效果的非同步方式執行作業。 只要,請提供手動重設事件,以及它將會...
而对于非阻塞模式,微软提出五种 I/O 模型:选择模型(select 模型)、异步选择模型(WSAAsyncSelect 模型)、事件选择模型(WSAEventSelect 模型)、重叠 I/O 模型(Overlapped I/O 模型)、完成端口模型。不同的模型,程序架构是不同的,相对而言,难度依次递增。
当队列和工作线程中有工作项可用于工作时,工作线程将从队列中拉出一个项目并为该线程调用 Worker 对象的Execute方法。然后将三个项目传递给该方法:队列中的项目、传递给 Worker:: 和 Worker:: 的同一个pvWorkerParam以及指向OVERLAPPED结构(用于 IO 完成端口队列)的指针。InitializeTerminate ...
Verificação de bugs 0x12D: VOLSNAP_OVERLAPPED_TABLE_ACCESS Verificação de bugs 0x12E: INVALID_MDL_RANGE Verificação de bugs 0x12F: VHD_BOOT_INITIALIZATION_FAILED Verificação de bugs 0x130: DYNAMIC_ADD_PROCESSOR_MISMATCH Verificação de bugs 0x131: INVALID_EXTENDE...
The kernel execution and the data transfer to be overlapped must both occur indifferent,non-defaultstreams. The host memory involved in the data transfer must bepinnedmemory. So let’s modify our simple host code from above to use multiple streams and see if we can achieve any overlap. The ...
Estimation of the band parameters of overlapped bands often relies on curve-fitting. It has been demonstrated that curve-fitting provides the maximum likelihood estimation of band parameters under a series of assumptions. One of these assumptions is that the curve-fitting model is correct and any ...