1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2021 Broadcom. All Rights Reserved. The term
* “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
*/
/*
* Generic state machine framework.
*/
#include "efc.h"
#include "efc_sm.h"
/**
* efc_sm_post_event() - Post an event to a context.
*
* @ctx: State machine context
* @evt: Event to post
* @data: Event-specific data (if any)
*/
int
efc_sm_post_event(struct efc_sm_ctx *ctx,
enum efc_sm_event evt, void *data)
{
if (!ctx->current_state)
return -EIO;
ctx->current_state(ctx, evt, data);
return 0;
}
void
efc_sm_transition(struct efc_sm_ctx *ctx,
void (*state)(struct efc_sm_ctx *,
enum efc_sm_event, void *), void *data)
{
if (ctx->current_state == state) {
efc_sm_post_event(ctx, EFC_EVT_REENTER, data);
} else {
efc_sm_post_event(ctx, EFC_EVT_EXIT, data);
ctx->current_state = state;
efc_sm_post_event(ctx, EFC_EVT_ENTER, data);
}
}
static char *event_name[] = EFC_SM_EVENT_NAME;
const char *efc_sm_event_name(enum efc_sm_event evt)
{
if (evt > EFC_EVT_LAST)
return "unknown";
return event_name[evt];
}
|
