CDI_Unregister_CDM

Deregisters a CDM and its entry points from NWPA.

Thread Context:Blocking

Syntax

    LONG CDI_Unregister_CDM (
       LONG   cdmOSHandle,
       LONG   cdmHandle
       );

Parameters

cdmOSHandle
(IN) The CDM's handle for using the CDI APIs. The value of cdmOSHandle was assigned during CDI_Register_CDM, and it is used in conjunction with the CDM-generated cdmHandle to uniquely identify a CDM when it interfaces with NWPA through the CDI API set.
cdmHandle
(IN) Handle that the CDM generated for itself. This handle is the CDM's own unique identifier. It is used in conjunction with the OS-generated cdmOSHandle to uniquely identify a CDM when it interfaces with NWPA through the CDI API set. Also, the CDM must be able to access its device list through this handle.

Return Values

The following table lists return values and descriptions.

zero

Successful

nonzero

Unsuccessful

Remarks

CDI_Unregister_CDM is used to deregister the CDM from NWPA prior to being unloaded. It is called within the context of CDM_Unload to flush pending I/O before the CDM is unloaded.