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/** @file
EFI Deferred Procedure Call Protocol
Copyright (c) 2007 - 2008, Intel Corporation
All rights reserved. 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 __DPC_H__
#define __DPC_H__
//
// DPC Protocol GUID value
//
#define EFI_DPC_PROTOCOL_GUID \
{ \
0x480f8ae9, 0xc46, 0x4aa9, { 0xbc, 0x89, 0xdb, 0x9f, 0xba, 0x61, 0x98, 0x6 } \
}
//
// Forward reference for pure ANSI compatability
//
typedef struct _EFI_DPC_PROTOCOL EFI_DPC_PROTOCOL;
/**
Invoke a Deferred Procedure Call.
@param DpcContext Pointer to the Deferred Procedure Call's context,
which is implementation dependent.
**/
typedef
VOID
(EFIAPI *EFI_DPC_PROCEDURE)(
IN VOID *DpcContext
);
/**
Add a Deferred Procedure Call to the end of the DPC queue.
@param This Protocol instance pointer.
@param DpcTpl The EFI_TPL that the DPC should be invoked.
@param DpcProcedure Pointer to the DPC's function.
@param DpcContext Pointer to the DPC's context. Passed to DpcProcedure
when DpcProcedure is invoked.
@retval EFI_SUCCESS The DPC was queued.
@retval EFI_INVALID_PARAMETER DpcTpl is not a valid EFI_TPL.
@retval EFI_INVALID_PARAMETER DpcProcedure is NULL.
@retval EFI_OUT_OF_RESOURCES There are not enough resources available to
add the DPC to the queue.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_DPC_QUEUE_DPC)(
IN EFI_DPC_PROTOCOL *This,
IN EFI_TPL DpcTpl,
IN EFI_DPC_PROCEDURE DpcProcedure,
IN VOID *DpcContext OPTIONAL
);
/**
Dispatch the queue of DPCs. ALL DPCs that have been queued with a DpcTpl
value greater than or equal to the current TPL are invoked in the order that
they were queued. DPCs with higher DpcTpl values are invoked before DPCs with
lower DpcTpl values.
@param This Protocol instance pointer.
@retval EFI_SUCCESS One or more DPCs were invoked.
@retval EFI_NOT_FOUND No DPCs were invoked.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_DPC_DISPATCH_DPC)(
IN EFI_DPC_PROTOCOL *This
);
///
/// DPC Protocol structure
///
struct _EFI_DPC_PROTOCOL {
EFI_DPC_QUEUE_DPC QueueDpc;
EFI_DPC_DISPATCH_DPC DispatchDpc;
};
///
/// DPC Protocol GUID variable
///
extern EFI_GUID gEfiDpcProtocolGuid;
#endif
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