55 lines
1.1 KiB
C
55 lines
1.1 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2021 Broadcom. All Rights Reserved. The term
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* “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
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*/
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/*
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* Generic state machine framework.
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*/
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#include "efc.h"
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#include "efc_sm.h"
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/**
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* efc_sm_post_event() - Post an event to a context.
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*
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* @ctx: State machine context
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* @evt: Event to post
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* @data: Event-specific data (if any)
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*/
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int
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efc_sm_post_event(struct efc_sm_ctx *ctx,
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enum efc_sm_event evt, void *data)
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{
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if (!ctx->current_state)
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return -EIO;
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ctx->current_state(ctx, evt, data);
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return 0;
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}
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void
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efc_sm_transition(struct efc_sm_ctx *ctx,
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void (*state)(struct efc_sm_ctx *,
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enum efc_sm_event, void *), void *data)
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{
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if (ctx->current_state == state) {
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efc_sm_post_event(ctx, EFC_EVT_REENTER, data);
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} else {
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efc_sm_post_event(ctx, EFC_EVT_EXIT, data);
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ctx->current_state = state;
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efc_sm_post_event(ctx, EFC_EVT_ENTER, data);
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}
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}
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static char *event_name[] = EFC_SM_EVENT_NAME;
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const char *efc_sm_event_name(enum efc_sm_event evt)
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{
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if (evt > EFC_EVT_LAST)
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return "unknown";
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return event_name[evt];
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}
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