audk/MdeModulePkg/Core/Dxe/Event/Event.h

/** @file
  UEFI Event support functions and structure.

Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution.  The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#ifndef __EVENT_H__
#define __EVENT_H__


#define VALID_TPL(a)            ((a) <= TPL_HIGH_LEVEL)
extern  UINTN                   gEventPending;

///
/// Set if Event is part of an event group
///
#define EVT_EXFLAG_EVENT_GROUP                    0x01
///
/// Set if Event is registered on a protocol notify
///
#define EVT_EXFLAG_EVENT_PROTOCOL_NOTIFICATION    0x02

//
// EFI_EVENT
//

///
/// Timer event information
///
typedef struct {
  LIST_ENTRY      Link;
  UINT64          TriggerTime;
  UINT64          Period;
} TIMER_EVENT_INFO;

#define EVENT_SIGNATURE         SIGNATURE_32('e','v','n','t')
typedef struct {
  UINTN                   Signature;
  UINT32                  Type;
  UINT32                  SignalCount;
  ///
  /// Entry if the event is registered to be signalled
  ///
  LIST_ENTRY              SignalLink;
  ///
  /// Notification information for this event
  ///
  EFI_TPL                 NotifyTpl;
  EFI_EVENT_NOTIFY        NotifyFunction;
  VOID                    *NotifyContext;
  EFI_GUID                EventGroup;
  LIST_ENTRY              NotifyLink;
  UINT8                   ExFlag;
  ///
  /// A list of all runtime events
  ///
  EFI_RUNTIME_EVENT_ENTRY RuntimeData;
  TIMER_EVENT_INFO        Timer;
} IEVENT;

//
// Internal prototypes
//


/**
  Dispatches all pending events.

  @param  Priority               The task priority level of event notifications
                                 to dispatch

**/
VOID
CoreDispatchEventNotifies (
  IN EFI_TPL      Priority
  );


/**
  Initializes timer support.

**/
VOID
CoreInitializeTimer (
  VOID
  );

#endif