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/* The prop object.
*
* This implements props within rsyslog.
*
* Copyright 2009-2012 Adiscon GmbH.
*
* This file is part of the rsyslog runtime library.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
* -or-
* see COPYING.ASL20 in the source distribution
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef INCLUDED_PROP_H
#define INCLUDED_PROP_H
#include "atomic.h"
/* the prop object */
struct prop_s {
BEGINobjInstance
; /* Data to implement generic object - MUST be the first data element! */
int iRefCount; /* reference counter */
union {
uchar *psz; /* stored string */
uchar sz[CONF_PROP_BUFSIZE];
} szVal;
int len; /* we use int intentionally, otherwise we may get some troubles... */
DEF_ATOMIC_HELPER_MUT(mutRefCount);
};
/* interfaces */
BEGINinterface(prop) /* name must also be changed in ENDinterface macro! */
INTERFACEObjDebugPrint(prop);
rsRetVal (*Construct)(prop_t **ppThis);
rsRetVal (*ConstructFinalize)(prop_t *pThis);
rsRetVal (*Destruct)(prop_t **ppThis);
rsRetVal (*SetString)(prop_t *pThis, const uchar *psz, const int len);
rsRetVal (*GetString)(prop_t *pThis, uchar **ppsz, int *plen);
int (*GetStringLen)(prop_t *pThis);
rsRetVal (*AddRef)(prop_t *pThis);
rsRetVal (*CreateStringProp)(prop_t **ppThis, const uchar *psz, const int len);
rsRetVal (*CreateOrReuseStringProp)(prop_t **ppThis, const uchar *psz, const int len);
ENDinterface(prop)
#define propCURR_IF_VERSION 1 /* increment whenever you change the interface structure! */
/* get classic c-style string */
/* Note: I know that "static inline" is not the right thing from a C99
* PoV, but some environments treat, even in C99 mode, compile
* non-static inline into the source even if not defined as "extern". This
* obviously results in linker errors. Using "static inline" as below together
* with "__attribute__((unused))" works in all cases. Note also that we
* cannot work around this as we would otherwise need to evaluate
* pThis more than once.
*/
static inline uchar *__attribute__((unused)) ATTR_NONNULL(1) propGetSzStr(prop_t *pThis) {
return (pThis->len < CONF_PROP_BUFSIZE) ? pThis->szVal.sz : pThis->szVal.psz;
}
static inline const char *__attribute__((unused)) propGetSzStrOrDefault(prop_t *pThis, const char *dflt) {
return (pThis != NULL) ? (const char *)propGetSzStr(pThis) : dflt;
}
static inline const char *__attribute__((unused)) szStrOrDefault(const uchar *psz, const char *dflt) {
return (psz != NULL) ? (const char *)psz : dflt;
}
/* prototypes */
PROTOTYPEObj(prop);
#endif /* #ifndef INCLUDED_PROP_H */
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