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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.
*
* Each object that uses this base class MUST provide a constructor with
* the following interface:
*
* Destruct(pThis);
*
* A constructor is not necessary (except for some features, e.g. de-serialization).
* If it is provided, it is a three-part constructor (to handle all cases with a
* generic interface):
*
* Construct(&pThis);
* SetProperty(pThis, property_t *);
* ConstructFinalize(pThis);
*
* SetProperty() and ConstructFinalize() may also be called on an object
* instance which has been Construct()'ed outside of this module.
*
* pThis always references to a pointer of the object.
*
* 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
#include "obj-types.h"
#include "var.h"
#include "stream.h"
/* macros */
/* the following one is a helper that prevents us from writing the
* ever-same code at the end of Construct()
*/
#define OBJCONSTRUCT_CHECK_SUCCESS_AND_CLEANUP \
if(iRet == RS_RET_OK) { \
*ppThis = pThis; \
} else { \
if(pThis != NULL) \
free(pThis); \
}
#define objSerializeSCALAR_VAR(strm, propName, propType, var) \
CHKiRet(obj.SerializeProp(strm, (uchar*) #propName, PROPTYPE_##propType, (void*) &var));
#define objSerializeSCALAR(strm, propName, propType) \
CHKiRet(obj.SerializeProp(strm, (uchar*) #propName, PROPTYPE_##propType, (void*) &pThis->propName));
#define objSerializePTR(strm, propName, propType) \
CHKiRet(obj.SerializeProp(strm, (uchar*) #propName, PROPTYPE_##propType, (void*) pThis->propName));
#define DEFobjStaticHelpers \
static objInfo_t *pObjInfoOBJ = NULL; \
DEFobjCurrIf(obj)
#define objGetClassName(pThis) (((obj_t*) (pThis))->pObjInfo->pszID)
#define objGetVersion(pThis) (((obj_t*) (pThis))->pObjInfo->iObjVers)
/* the next macro MUST be called in Constructors: */
#ifndef NDEBUG /* this means if debug... */
# define objConstructSetObjInfo(pThis) \
ASSERT(((obj_t*) (pThis))->pObjInfo == NULL); \
((obj_t*) (pThis))->pObjInfo = pObjInfoOBJ; \
((obj_t*) (pThis))->iObjCooCKiE = 0xBADEFEE
#else
# define objConstructSetObjInfo(pThis) ((obj_t*) (pThis))->pObjInfo = pObjInfoOBJ
#endif
#define objDestruct(pThis) (((obj_t*) (pThis))->pObjInfo->objMethods[objMethod_DESTRUCT])(&pThis)
#define objSerialize(pThis) (((obj_t*) (pThis))->pObjInfo->objMethods[objMethod_SERIALIZE])
#define objGetSeverity(pThis, piSever) (((obj_t*) (pThis))->pObjInfo->objMethods[objMethod_GETSEVERITY])(pThis, piSever)
#define objDebugPrint(pThis) (((obj_t*) (pThis))->pObjInfo->objMethods[objMethod_DEBUGPRINT])(pThis)
#define OBJSetMethodHandler(methodID, pHdlr) \
CHKiRet(obj.InfoSetMethod(pObjInfoOBJ, methodID, (rsRetVal (*)(void*)) pHdlr))
/* interfaces */
BEGINinterface(obj) /* name must also be changed in ENDinterface macro! */
rsRetVal (*UseObj)(uchar *pObjName, uchar *pObjFile, interface_t **ppIf);
rsRetVal (*InfoConstruct)(objInfo_t **ppThis, uchar *pszID, int iObjVers,
rsRetVal (*pConstruct)(void *), rsRetVal (*pDestruct)(void *),
rsRetVal (*pQueryIF)(interface_t*));
rsRetVal (*DestructObjSelf)(obj_t *pThis);
rsRetVal (*BeginSerializePropBag)(strm_t *pStrm, obj_t *pObj);
rsRetVal (*InfoSetMethod)(objInfo_t *pThis, objMethod_t objMethod, rsRetVal (*pHandler)(void*));
rsRetVal (*BeginSerialize)(strm_t *pStrm, obj_t *pObj);
rsRetVal (*SerializeProp)(strm_t *pStrm, uchar *pszPropName, propType_t propType, void *pUsr);
rsRetVal (*EndSerialize)(strm_t *pStrm);
rsRetVal (*RegisterObj)(uchar *pszObjName, objInfo_t *pInfo);
rsRetVal (*Deserialize)(void *ppObj, uchar *pszTypeExpected, strm_t *pStrm, rsRetVal (*fFixup)(obj_t*,void*), void *pUsr);
rsRetVal (*DeserializePropBag)(obj_t *pObj, strm_t *pStrm);
rsRetVal (*SetName)(obj_t *pThis, uchar *pszName);
uchar * (*GetName)(obj_t *pThis);
ENDinterface(obj)
#define objCURR_IF_VERSION 1 /* increment whenever you change the interface structure! */
/* prototypes */
/* the following define *is* necessary, because it provides the root way of obtaining
* interfaces (at some place we need to start our query...
*/
rsRetVal objGetObjInterface(obj_if_t *pIf);
PROTOTYPEObjClassInit(obj);
#endif /* #ifndef OBJ_H_INCLUDED */
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