RESTORE_WC_MEMORY callback function (video.h)

The VideoPortRestoreWCMemory callback routine restores Write Combined video memory from a protected state after the VideoPortProtectWCMemory callback routine was called.

Syntax

RESTORE_WC_MEMORY RestoreWcMemory;

VP_STATUS RestoreWcMemory(
  [in] IN PVOID Context,
  [in] IN PVOID HwDeviceExtension
)
{...}

Parameters

[in] Context

Pointer to a caller-determined context parameter to be passed to the CallbackRoutine. It typically points to the VIDEO_PORT_CONFIG_INFO buffer.

[in] HwDeviceExtension

Pointer to the miniport driver's hardware device extension.

Return value

VideoPortRestoreWCMemory returns NO_ERROR if it successfully restored Write Combined video memory; otherwise, it returns an error status of ERROR_INVALID_FUNCTION or ERROR_NOT_ENOUGH_MEMORY.

Remarks

After the VideoPortProtectWCMemory callback routine is called, the CPU cannot write to Write Combined memory until VideoPortRestoreWCMemory is called.

Requirements

Requirement Value
Minimum supported client Available in Windows 2000 and later versions of the Windows operating systems.
Target Platform Desktop
Header video.h (include Video.h)

See also

VIDEO_PORT_CONFIG_INFO

VideoPortProtectWCMemory