From e5f51c5f97b6861ea3c69ac4ff01dad75750c09b Mon Sep 17 00:00:00 2001 From: Rainer Gerhards Date: Wed, 20 Feb 2008 16:10:20 +0000 Subject: created initial vmprg class --- vmprg.h | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 vmprg.h (limited to 'vmprg.h') diff --git a/vmprg.h b/vmprg.h new file mode 100644 index 00000000..9b278360 --- /dev/null +++ b/vmprg.h @@ -0,0 +1,57 @@ +/* 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 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 . + * + * A copy of the GPL can be found in the file "COPYING" in this distribution. + */ +#ifndef INCLUDED_VMPRG_H +#define INCLUDED_VMPRG_H + +#include "vmop.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; + + +/* prototypes */ +rsRetVal vmprgConstruct(vmprg_t **ppThis); +rsRetVal vmprgConstructFinalize(vmprg_t __attribute__((unused)) *pThis); +rsRetVal vmprgDestruct(vmprg_t **ppThis); +rsRetVal addOperation(vmprg_t *pThis, vmop_t *pOp); +PROTOTYPEObjClassInit(vmprg); + +#endif /* #ifndef INCLUDED_VMPRG_H */ -- cgit