IPortWaveRTStream::GetPhysicalPagesCount method (portcls.h)

Article
02/22/2024

The GetPhysicalPagesCount method returns the count of the physical pages in a memory descriptor list (MDL).

Syntax

ULONG GetPhysicalPagesCount(
  [in] PMDL MemoryDescriptorList
);

Parameters

[in] MemoryDescriptorList

Pointer to the MDL.

Return value

GetPhysicalPagesCount method returns the count of physical pages in the MDL.

Remarks

The miniport driver uses this call to determine the number of physical pages that are contained within an MDL. The count is typically used in the process of programming the DMA hardware.

Requirements

Requirement	Value
Minimum supported client	Available in Windows Vista and later Windows operating systems.
Target Platform	Universal
Header	portcls.h
IRQL	Passive level.