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#!/usr/bin/env python3
import jinja2
import sys
def as_tuple(str_or_tuple):
if isinstance(str_or_tuple, str):
return (str_or_tuple,)
return tuple(str_or_tuple)
class State:
def __init__(s, name, events, out_states, onenter=True):
s.name = name
s.const = name.upper()
s.events = as_tuple(events)
s.out_states = as_tuple(out_states)
s.onenter = onenter
def __eq__(s, name):
return s.name == name
class Event:
def __init__(s, name):
s.name = name
s.const = name.upper()
def __eq__(s, name):
return s.name == name
class FSM:
def NAME(s, name):
return '_'.join((s.prefix, name)).upper()
def name(s, name):
return '_'.join((s.prefix, name)).lower()
def state_const(s, name):
return s.NAME('ST_' + name)
def event_const(s, name):
return s.NAME('EV_' + name)
def __init__(s, prefix, priv, states, head=''):
s.head = head
s.prefix = prefix
s.priv = priv
s.states = states
for state in s.states:
state.const = s.state_const(state.name)
out_state_class_insts = []
for out_state in state.out_states:
out_state_class_insts.append(s.states[s.states.index(out_state)])
state.out_states = out_state_class_insts
s.events = []
for state in s.states:
state_event_class_insts = []
for event in state.events:
if event not in s.events:
ev = Event(event)
ev.const = s.event_const(event)
s.events.append(ev)
else:
ev = s.events[s.events.index(event)]
state_event_class_insts.append(ev)
state.events = state_event_class_insts
def to_c(s):
template = jinja2.Template(
'''
{{head}}
#include <osmocom/core/utils.h>
#include <osmocom/core/fsm.h>
enum {{prefix}}_fsm_state {
{% for state in states %} {{state.const}},
{% endfor -%}
};
enum {{prefix}}_fsm_event {
{% for event in events %} {{event.const}},
{% endfor -%}
};
static const struct value_string {{prefix}}_fsm_event_names[] = {
{% for event in events %} OSMO_VALUE_STRING({{event.const}}),
{% endfor %} {}
};
static struct osmo_fsm {{prefix}}_fsm;
struct {{priv}} *{{prefix}}_alloc(struct osmo_fsm_inst *parent_fi, uint32_t parent_event_term)
{
struct {{priv}} *{{priv}};
struct osmo_fsm_inst *fi = osmo_fsm_inst_alloc_child(&{{prefix}}_fsm, parent_fi, parent_event_term);
OSMO_ASSERT(fi);
{{priv}} = talloc(fi, struct {{priv}});
OSMO_ASSERT({{priv}});
fi->priv = {{priv}};
*{{priv}} = (struct {{priv}}){
.fi = fi,
};
return {{priv}};
}
static int {{prefix}}_fsm_timer_cb(struct osmo_fsm_inst *fi)
{
//struct {{priv}} *{{priv}} = fi->priv;
/* Return 1 to terminate FSM instance, 0 to keep running */
return 1;
}
{% for state in states %}
{%- if state.onenter %}
static void {{prefix}}_{{state.name}}_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state)
{
//struct {{priv}} *{{priv}} = fi->priv;
// FIXME
}
{% endif %}
static void {{prefix}}_{{state.name}}_action(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
//struct {{priv}} *{{priv}} = fi->priv;
switch (event) {
{% for event in state.events %}
case {{event.const}}:
// FIXME
break;
{% endfor %}
default:
OSMO_ASSERT(false);
}
}
{% endfor %}
#define S(x) (1 << (x))
static const struct osmo_fsm_state {{prefix}}_fsm_states[] = {
{% for state in states %} [{{state.const}}] = {
.name = "{{state.name}}",
.in_event_mask = 0
{% for event in state.events %} | S({{event.const}})
{% endfor %} ,
.out_state_mask = 0
{% for out_state in state.out_states %} | S({{out_state.const}})
{% endfor %} ,{% if state.onenter %}
.onenter = {{prefix}}_{{state.name}}_onenter,{% endif %}
.action = {{prefix}}_{{state.name}}_action,
},
{% endfor -%}
};
static struct osmo_fsm {{prefix}}_fsm = {
.name = "{{prefix}}",
.states = {{prefix}}_fsm_states,
.num_states = ARRAY_SIZE({{prefix}}_fsm_states),
.log_subsys = DLGLOBAL, // FIXME
.event_names = {{prefix}}_fsm_event_names,
.timer_cb = {{prefix}}_fsm_timer_cb,
};
static __attribute__((constructor)) void {{prefix}}_fsm_register(void)
{
OSMO_ASSERT(osmo_fsm_register(&{{prefix}}_fsm) == 0);
}
''')
return template.render(**vars(s))
fsm = FSM(head='#include <osmocom/bsc/lcs.h>',
prefix = 'lcs_loc_req',
priv = 'lcs_loc_req',
states = (
State('init',
('start',),
('wait_location_response',),
onenter=False,
),
State('wait_location_response',
('rx_le_perform_location_response',),
('got_location_response', ),
),
State('got_location_response',
(),
(),
),
)
)
with open('lcs_loc_req.c', 'w') as f:
f.write(fsm.to_c())
fsm = FSM(head='#include <osmocom/bsc/lcs.h>',
prefix = 'lcs_ta_req',
priv = 'lcs_ta_req',
states = (
State('init',
('start',),
('wait_ta', 'got_ta'),
onenter=False,
),
State('wait_ta',
('ta',),
('got_ta', ),
),
State('got_ta',
(),
(),
),
)
)
with open('lcs_ta_req.c', 'w') as f:
f.write(fsm.to_c())
|
