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DlAllocateCommonBuffer function (dispmprt.h)

  • Article

Allocates and maps a logically contiguous region of memory that is simultaneously accessible both from the processor and from a device.

Syntax

PVOID DlAllocateCommonBuffer(
  IN PVOID              DeviceHandle,
  IN PVP_DMA_ADAPTER    DlpDmaAdapter,
  IN ULONG              DesiredLength,
  OUT PPHYSICAL_ADDRESS LogicalAddress,
  IN BOOLEAN            CacheEnabled,
  OUT PVOID             Reserved
);

Parameters

DeviceHandle

Handle to the device.

DlpDmaAdapter

Display library direct memory access adapter.

DesiredLength

Specifies the requested number of bytes of memory.

LogicalAddress

Pointer to a memory location that receives the logical address to be used by the adapter to access the allocated buffer.

CacheEnabled

Specifies whether the allocated memory can be cached.

Reserved

Is currently ignored by the video port driver.

Return value

This function returns PVOID.

Requirements

Requirement Value
Header dispmprt.h