mirror of
https://github.com/QuantumLeaps/qpc.git
synced 2025-01-21 06:53:11 +08:00
49 lines
1.9 KiB
C
49 lines
1.9 KiB
C
/*****************************************************************************
|
|
* Product: Generic State-Table event processor
|
|
* Date of the Last Update: Oct 22, 2007
|
|
*
|
|
* Copyright (C) 2002-2007 Miro Samek. All rights reserved.
|
|
*
|
|
* Contact information:
|
|
* e-mail: miro@quantum-leaps.com
|
|
*****************************************************************************/
|
|
#include "bsp.h" /* for the C99-standard exact-width integer types */
|
|
#include "statetbl.h"
|
|
|
|
/* see also embedded-systems-friendly assertions in Chapter 6 */
|
|
#include <assert.h>
|
|
|
|
/*..........................................................................*/
|
|
void StateTable_ctor(StateTable *me,
|
|
Tran const *table, uint8_t n_states, uint8_t n_signals,
|
|
Tran initial)
|
|
{
|
|
me->state_table = table;
|
|
me->n_states = n_states;
|
|
me->n_signals = n_signals;
|
|
me->initial = initial;
|
|
}
|
|
/*..........................................................................*/
|
|
void StateTable_init(StateTable *me) {
|
|
me->state = me->n_states;
|
|
(*me->initial)(me, (Event *)0); /* top-most initial transition */
|
|
|
|
assert(me->state < me->n_states);/* the initial tran. must change state */
|
|
}
|
|
/*..........................................................................*/
|
|
void StateTable_dispatch(StateTable *me, Event const *e) {
|
|
Tran t;
|
|
|
|
assert(e->sig < me->n_signals); /* require the signal in range */
|
|
|
|
t = me->state_table[me->state*me->n_signals + e->sig];
|
|
(*t)(me, e); /* execute the transition function */
|
|
|
|
assert(me->state < me->n_states); /* ensure that state stays in range */
|
|
}
|
|
/*..........................................................................*/
|
|
void StateTable_empty(StateTable *me, Event const *e) {
|
|
(void)me; /* void compiler warning about unused parameter */
|
|
(void)e; /* void compiler warning about unused parameter */
|
|
}
|