Intel Extensible Firmware Interface - Manual (Page 111)

Services — Boot Services
Version 1.10 12/01/02 5-13
SetTimer()
Summary
Sets the type of timer and the trigger time for a timer event.
Prototype
EFI_STATUS
SetTimer (
IN EFI_EVENT Event,
IN EFI_TIMER_DELAY Type,
IN UINT64 TriggerTime
);
Parameters
Event The timer event that is to be signaled at the specified time. Type
EFI_EVENT is defined in the CreateEvent() function
description.
Type The type of time that is specified in TriggerTime . See the
timer delay types in “Related Definitions.”
TriggerTime The number of 100ns units until the timer expires.
Related Definitions
//*******************************************************
//EFI_TIMER_DELAY
//*******************************************************
typedef enum {
TimerCancel,
TimerPeriodic,
TimerRelative
} EFI_TIMER_DELAY;
TimerCancel The event’s timer setting is to be cancelled and no timer trigger is
to be set.
TriggerTime is ignored when canceling a timer.
TimerPeriodic The event is to be signaled periodically at TriggerTime
intervals from the current time. This is the only timer trigger
Type for which the event timer does not need to be reset for each
notification. All other timer trigger types are “one shot.”
TimerRelative The event is to be signaled in TriggerTime 100ns units.