callback.h

来自「eCos操作系统源码」· C头文件 代码 · 共 135 行

//==========================================================================
//
//      ./lib/current/include/callback.h
//
//
//==========================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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// eCos is free software; you can redistribute it and/or modify it under
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// You should have received a copy of the GNU General Public License along
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// -------------------------------------------
//####ECOSGPLCOPYRIGHTEND####
//####UCDSNMPCOPYRIGHTBEGIN####
//
// -------------------------------------------
//
// Portions of this software may have been derived from the UCD-SNMP
// project,  <http://ucd-snmp.ucdavis.edu/>  from the University of
// California at Davis, which was originally based on the Carnegie Mellon
// University SNMP implementation.  Portions of this software are therefore
// covered by the appropriate copyright disclaimers included herein.
//
// The release used was version 4.1.2 of May 2000.  "ucd-snmp-4.1.2"
// -------------------------------------------
//
//####UCDSNMPCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):    hmt
// Contributors: hmt
// Date:         2000-05-30
// Purpose:      Port of UCD-SNMP distribution to eCos.
// Description:  
//              
//
//####DESCRIPTIONEND####
//
//==========================================================================
/********************************************************************
       Copyright 1989, 1991, 1992 by Carnegie Mellon University

			  Derivative Work -
Copyright 1996, 1998, 1999, 2000 The Regents of the University of California

			 All Rights Reserved

Permission to use, copy, modify and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appears in all copies and
that both that copyright notice and this permission notice appear in
supporting documentation, and that the name of CMU and The Regents of
the University of California not be used in advertising or publicity
pertaining to distribution of the software without specific written
permission.

CMU AND THE REGENTS OF THE UNIVERSITY OF CALIFORNIA DISCLAIM ALL
WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL CMU OR
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA BE LIABLE FOR ANY SPECIAL,
INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
FROM THE LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*********************************************************************/
/* callback.c: A generic callback mechanism */

#ifndef CALLBACK_H
#define CALLBACK_H

#ifdef __cplusplus
extern "C" {
#endif

#define MAX_CALLBACK_IDS    2
#define MAX_CALLBACK_SUBIDS 8

/* Callback Major Types */
#define SNMP_CALLBACK_LIBRARY     0
#define SNMP_CALLBACK_APPLICATION 1

/* SNMP_CALLBACK_LIBRARY minor types */
#define SNMP_CALLBACK_POST_READ_CONFIG	        0
#define SNMP_CALLBACK_STORE_DATA	        1
#define SNMP_CALLBACK_SHUTDOWN		        2
#define SNMP_CALLBACK_POST_PREMIB_READ_CONFIG	3
#define SNMP_CALLBACK_LOGGING			4

typedef int (SNMPCallback)(int majorID, int minorID, void *serverarg,
                           void *clientarg);

struct snmp_gen_callback {
   SNMPCallback         *sc_callback;
   void                 *sc_client_arg;
   struct snmp_gen_callback *next;
};

/* function prototypes */
void init_callbacks(void);
int snmp_register_callback(int major, int minor, SNMPCallback *new_callback,
                           void *arg);
int snmp_call_callbacks(int major, int minor, void *caller_arg);

#ifdef __cplusplus
}
#endif

#endif /* CALLBACK_H */