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/* Definition of the generic obj class module.
*
* This module relies heavily on preprocessor macros in order to
* provide fast execution time AND ease of use.
*
* Copyright 2008 Rainer Gerhards and Adiscon GmbH.
*
* This file is part of rsyslog.
*
* Rsyslog is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Rsyslog is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Rsyslog. If not, see <http://www.gnu.org/licenses/>.
*
* A copy of the GPL can be found in the file "COPYING" in this distribution.
*/
#ifndef OBJ_H_INCLUDED
#define OBJ_H_INCLUDED
typedef enum { /* IDs of known object "types/classes" */
objNull = 0, /* no valid object (we do not start at zero so we can detect calloc()) */
objMsg = 1
} objID_t;
typedef enum { /* IDs of base methods supported by all objects - used for jump table, so
* they must start at zero and be incremented. -- rgerahrds, 2008-01-04
*/
objMethod_DESTRUCT = 0,
objMethod_SERIALIZE = 1,
objMethod_DESERIALIZE = 2,
objMethod_DEBUGPRINT = 3
} objMethod_t;
#define OBJ_NUM_METHODS 4 /* must be updated to contain the max number of methods supported */
typedef struct objInfo_s {
objID_t objID;
uchar *pszName;
rsRetVal (*objMethods[OBJ_NUM_METHODS])();
} objInfo_t;
typedef struct obj { /* the dummy struct that each derived class can be casted to */
objInfo_t *pObjInfo;
} obj_t;
/* macros */
#define DEFobjStaticHelpers static objInfo_t *pObjInfoOBJ = NULL;
#define BEGINobjInstance objInfo_t *pObjInfo
/* must be called in Constructor: */
#define objConstructSetObjInfo(pThis) ((obj_t*) (pThis))->pObjInfo = pObjInfoOBJ;
#define objDestruct(pThis) (((obj_t*) (pThis))->pObjInfo->objMethods[objMethod_DESTRUCT])(pThis)
#define objSerialize(pThis) (((obj_t*) (pThis))->pObjInfo->objMethods[objMethod_SERIALIZE])
/* class initializer */
#define PROTOTYPEObjClassInit(objName) rsRetVal objName##ClassInit(void)
#define BEGINObjClassInit(objName) \
rsRetVal objName##ClassInit(void) \
{ \
DEFiRet; \
CHKiRet(objInfoConstruct(&pObjInfoOBJ, obj##objName, (uchar*) #objName, (rsRetVal (*)(void*))objName##Destruct));
#define ENDObjClassInit \
finalize_it: \
return iRet; \
}
#define OBJSetMethodHandler(methodID, pHdlr) \
CHKiRet(objInfoSetMethod(pObjInfoOBJ, methodID, (rsRetVal (*)(void*)) pHdlr))
/* prototypes */
rsRetVal objInfoConstruct(objInfo_t **ppThis, objID_t objID, uchar *pszName, rsRetVal (*pDestruct)(void *));
rsRetVal objInfoSetMethod(objInfo_t *pThis, objMethod_t objMethod, rsRetVal (*pHandler)(void*));
#endif /* #ifndef OBJ_H_INCLUDED */
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