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) |