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Diffstat (limited to 'runtime/vmprg.h')
| -rw-r--r-- | runtime/vmprg.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/runtime/vmprg.h b/runtime/vmprg.h new file mode 100644 index 0000000..db1f62f --- /dev/null +++ b/runtime/vmprg.h @@ -0,0 +1,66 @@ +/* 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 the rsyslog runtime library. + * + * The rsyslog runtime library is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * The rsyslog runtime library 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with the rsyslog runtime library. If not, see <http://www.gnu.org/licenses/>. + * + * A copy of the GPL can be found in the file "COPYING" in this distribution. + * A copy of the LGPL can be found in the file "COPYING.LESSER" 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; + + +/* 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); +ENDinterface(vmprg) +#define vmprgCURR_IF_VERSION 1 /* increment whenever you change the interface structure! */ + + +/* prototypes */ +PROTOTYPEObj(vmprg); + +#endif /* #ifndef INCLUDED_VMPRG_H */ |