Call_Global_Event

include vmm.inc

mov     esi, OFFSET32 GlobalEventCallback
mov     edx, RefData
VMMCall Call_Global_Event
mov     [EventHandle], esi
 

Calls the specified event callback function immediately or schedules a global event. This is an asynchronous service. Uses Flags. If the system decides to schedule the event, it is not defined what order the events are processed.

• Returns zero in ESI zero if the service calls the callback function. Otherwise, returns the event handle in ESI. The event handle can be used in subsequent calls to the Cancel_Global_Event service to cancel the event.

EventCallback

Address of the callback function to install.

RefData

Address of reference data to pass to the event callback function.

Any virtual machine can process the event, so the system does not switch tasks before calling the function. The callback function can carry out any actions, and use any VMM services. For a description of the callback function, see GlobalEventCallback. For information about event callback functions, see Event Callbacks.

See Also

Cancel_Global_Event, GlobalEventCallback, Schedule_Global_Event