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GDI Event Services

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GDI provides several services related to events. Drivers using these services can create and delete events, map and unmap events, and read, set and clear events.

Function Description

EngClearEvent

Sets a specified event object to the nonsignaled state.

EngCreateEvent

Creates a synchronization event object that can be used to synchronize hardware access between a display driver and the video miniport driver.

EngDeleteEvent

Deletes the specified event object.

EngMapEvent

Maps a user-mode event object to kernel mode.

EngReadStateEvent

Returns the current state of the specified event object: signaled or nonsignaled.

EngSetEvent

Sets the specified event object to the signaled state, and returns the event object's previous state.

EngUnmapEvent

Cleans up the kernel-mode resources allocated for a mapped user-mode event.

EngWaitForSingleObject

Puts the current thread of the display driver into a wait state until the specified event object is set to the signaled state, or until the wait times out.