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[mirror_edk2.git] / MdeModulePkg / Core / Dxe / Event.h

/** @file\r
  UEFI Event support functions and structure.\r
\r
Copyright (c) 2006 - 2008, Intel Corporation. <BR>\r
All rights reserved. This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution.  The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#ifndef __EVENT_H__\r
#define __EVENT_H__\r
\r
#define VALID_TPL(a)            ((a) <= TPL_HIGH_LEVEL)\r
\r
//\r
// EFI_EVENT\r
//\r
#define EVENT_SIGNATURE         EFI_SIGNATURE_32('e','v','n','t')\r
typedef struct {\r
  UINTN                   Signature;\r
  UINT32                  Type;\r
  UINT32                  SignalCount;\r
\r
  //\r
  // Entry if the event is registered to be signalled\r
  //\r
\r
  LIST_ENTRY              SignalLink;\r
\r
  //\r
  // Notification information for this event\r
  //\r
\r
  EFI_TPL                 NotifyTpl;\r
  EFI_EVENT_NOTIFY        NotifyFunction;\r
  VOID                    *NotifyContext;\r
  EFI_GUID                EventGroup;\r
  LIST_ENTRY              NotifyLink;\r
  BOOLEAN                 ExFlag;\r
\r
  //\r
  // A list of all runtime events\r
  //\r
  EFI_RUNTIME_EVENT_ENTRY   RuntimeData;\r
\r
  //\r
  // Information by event type\r
  //\r
\r
  union {\r
    //\r
    // For timer events\r
    //\r
    struct {\r
      LIST_ENTRY      Link;\r
      UINT64          TriggerTime;\r
      UINT64          Period;\r
    } Timer;\r
  } u;\r
\r
} IEVENT;\r
\r
//\r
// Internal prototypes\r
//\r
\r
\r
/**\r
  Dispatches all pending events.\r
\r
  @param  Priority               The task priority level of event notifications\r
                                 to dispatch\r
\r
**/\r
VOID\r
CoreDispatchEventNotifies (\r
  IN EFI_TPL      Priority\r
  );\r
\r
\r
\r
//\r
// Exported functions\r
//\r
/**\r
  Initializes timer support.\r
\r
**/\r
VOID\r
CoreInitializeTimer (\r
  VOID\r
  );\r
\r
//\r
// extern data declarations\r
//\r
\r
extern EFI_LOCK       gEventQueueLock;\r
extern UINTN          gEventPending;\r
extern LIST_ENTRY     gEventQueue[];\r
extern LIST_ENTRY     gEventSignalQueue;\r
\r
#endif\r