Event mask

An event mask is a value whose bits are interpreted as events that should be tracked or that have already occurred. An event mask has a size of 32 bits and consists of a general part and a specialized part. The general part describes the general events that are not specific to any particular resource (the flags of these events are defined in the handle/event_descr.h header file). For example, the general part contains the EVENT_OBJECT_DESTROYED flag, which defines the "resource termination" event. The specialized part describes the events that are specific to a particular user resource. The structure of the specialized part is defined by the resource provider by using the OBJECT_EVENT_SPEC() macro that is defined in the handle/event_descr.h header file. The resource provider must export the public header files describing the structure of the specialized part.