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IWDFIoRequestCompletionParams::GetReadParameters method (wudfddi.h)

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[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 GetReadParameters method retrieves parameters that are associated with the completion of a read request.

Syntax

void GetReadParameters(
  [out] IWDFMemory **ppReadMemory,
  [out] SIZE_T     *pBytesRead,
  [out] SIZE_T     *pReadMemoryOffset
);

Parameters

[out] ppReadMemory

A pointer to a variable that receives a pointer to the IWDFMemory interface for access to the read buffer for the completion of the read request.

This parameter is optional. The driver can pass NULL if the driver does not require the information.

[out] pBytesRead

A pointer to a variable that receives the size, in bytes, of the read buffer for the completion of the read request.

This parameter is optional. The driver can pass NULL if the driver does not require the information.

[out] pReadMemoryOffset

A pointer to a variable that receives the offset, in bytes, into the read buffer for the completion of the read request.

This parameter is optional. The driver can pass NULL if the driver does not require the information.

Return value

None

Requirements

Requirement Value
End of support Unavailable in UMDF 2.0 and later.
Target Platform Desktop
Minimum UMDF version 1.5
Header wudfddi.h (include Wudfddi.h)
DLL WUDFx.dll

See also

IWDFIoRequestCompletionParams

IWDFMemory