IWDFIoRequest interface (wudfddi.h)
[Warning: UMDF 2 is the latest version of UMDF and supersedes UMDF 1. All new UMDF drivers should be written using UMDF 2. No new features are being added to UMDF 1 and there is limited support for UMDF 1 on newer versions of Windows 10. Universal Windows drivers must use UMDF 2. For more info, see Getting Started with UMDF.]
The IWDFIoRequest interface exposes an I/O request object.
Inheritance
The IWDFIoRequest interface inherits from IWDFObject. IWDFIoRequest also has these types of members:
- Methods
Methods
The IWDFIoRequest interface has these methods.
| IWDFIoRequest::CancelSentRequest The CancelSentRequest method attempts to cancel the I/O request that the driver previously submitted to an I/O target. |
| IWDFIoRequest::Complete The Complete method completes an I/O request. |
| IWDFIoRequest::CompleteWithInformation The CompleteWithInformation method completes a request with the supplied information. |
| IWDFIoRequest::FormatUsingCurrentType The FormatUsingCurrentType method formats an I/O request so that the driver can forward it, unmodified, to the next-lower driver. |
| IWDFIoRequest::ForwardToIoQueue The ForwardToIoQueue method forwards (that is, requeues) an I/O request to one of the calling driver's I/O queues. |
| IWDFIoRequest::GetCompletionParams The GetCompletionParams method retrieves the parameters object for the completion of an I/O request object. |
| IWDFIoRequest::GetCreateParameters The GetCreateParameters method retrieves the request parameters for a create-type request. |
| IWDFIoRequest::GetDeviceIoControlParameters The GetDeviceIoControlParameters method retrieves the request parameters for a device I/O control-type request. |
| IWDFIoRequest::GetFileObject The GetFileObject method retrieves a pointer to the IWDFFile interface that is associated with an I/O request. |
| IWDFIoRequest::GetInputMemory The GetInputMemory method retrieves the memory object that represents the input buffer in an I/O request. |
| IWDFIoRequest::GetIoQueue The GetIoQueue method retrieves the I/O queue object that is associated with an I/O request. |
| IWDFIoRequest::GetOutputMemory The GetOutputMemory method retrieves the memory object that represents the output buffer for an I/O request. |
| IWDFIoRequest::GetReadParameters The GetReadParameters method retrieves the request parameters for a read-type request. |
| IWDFIoRequest::GetRequestorProcessId The GetRequestorProcessId method retrieves the identifier of the process that sent an I/O request. |
| IWDFIoRequest::GetType The GetType method retrieves the type of operation that a request contains. |
| IWDFIoRequest::GetWriteParameters The GetWriteParameters method retrieves the request parameters for a write-type request. |
| IWDFIoRequest::Impersonate The Impersonate method registers the interface for the method that the framework should call for impersonation. |
| IWDFIoRequest::IsFrom32BitProcess The IsFrom32BitProcess method determines whether a request originated from a 32-bit process. |
| IWDFIoRequest::MarkCancelable The MarkCancelable method enables the canceling of the I/O request. |
| IWDFIoRequest::Send The Send method sends a request to the specified I/O target. |
| IWDFIoRequest::SetCompletionCallback The SetCompletionCallback method registers the interface for the OnCompletion method that the framework should call when an I/O request completes. |
| IWDFIoRequest::SetInformation The SetInformation method sets the size of information for a request. |
| IWDFIoRequest::UnmarkCancelable The UnmarkCancelable method disables the canceling of an I/O request. |
Requirements
| Requirement | Value |
|---|---|
| End of support | Unavailable in UMDF 2.0 and later. |
| Target Platform | Desktop |
| Minimum UMDF version | 1.5 |
| Header | wudfddi.h |
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