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/* The vmprg object.
*
* The program is made up of vmop_t's, one after another. When we support
* branching (or user-defined functions) at some time, well do this via
* special branch opcodes. They will then contain the actual memory
* address of a logical program entry that we shall branch to. Other than
* that, all execution is serial - that is one opcode is executed after
* the other. This class implements a logical program store, modelled
* after real main memory. A linked list of opcodes is used to implement it.
* In the future, we may use linked lists of array's to enhance performance,
* but for the time being we have taken the simplistic approach (which also
* reduces risk of bugs during initial development). The necessary pointers
* for this are already implemented in vmop. Though this is not the 100%
* correct place, we have opted this time in favor of performance, which
* made them go there.
*
* Copyright 2008-2012 Rainer Gerhards and 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_VMPRG_H
#define INCLUDED_VMPRG_H
#include "vmop.h"
#include "stringbuf.h"
/* the vmprg object */
typedef struct vmprg_s {
BEGINobjInstance; /* Data to implement generic object - MUST be the first data element! */
vmop_t *vmopRoot; /* start of program */
vmop_t *vmopLast; /* last vmop of program (for adding new ones) */
} vmprg_t;
/* interfaces */
BEGINinterface(vmprg) /* name must also be changed in ENDinterface macro! */
INTERFACEObjDebugPrint(vmprg);
rsRetVal (*Construct)(vmprg_t **ppThis);
rsRetVal (*ConstructFinalize)(vmprg_t __attribute__((unused)) *pThis);
rsRetVal (*Destruct)(vmprg_t **ppThis);
rsRetVal (*AddOperation)(vmprg_t *pThis, vmop_t *pOp);
rsRetVal (*AddVarOperation)(vmprg_t *pThis, opcode_t opcode, var_t *pVar);
rsRetVal (*Obj2Str)(vmprg_t *pThis, cstr_t *pstr);
/* v2 (4.1.7) */
rsRetVal (*AddCallOperation)(vmprg_t *pThis, cstr_t *pVar); /* added 2009-04-06 */
ENDinterface(vmprg)
#define vmprgCURR_IF_VERSION 2 /* increment whenever you change the interface structure! */
/* prototypes */
PROTOTYPEObj(vmprg);
#endif /* #ifndef INCLUDED_VMPRG_H */
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