62 lines
2.1 KiB
C
62 lines
2.1 KiB
C
/****************************************************************************
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* Copyright (C) 2022 Xiaomi Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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***************************************************************************/
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#ifndef __STATE_MACHINE_H__
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#define __STATE_MACHINE_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdlib.h>
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/* Default string returned when state name is NULL */
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#define HSM_NONE_STR "None"
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typedef struct _state_machine state_machine_t;
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typedef struct _state {
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const char* state_name;
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const uint16_t state_value;
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void (*enter)(state_machine_t* sm);
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void (*exit)(state_machine_t* sm);
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bool (*process_event)(state_machine_t* sm, uint32_t event, void* data);
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} state_t;
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typedef struct _state_machine {
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const state_t* initial_state;
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const state_t* previous_state;
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const state_t* current_state;
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const state_t* parent_state;
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} state_machine_t;
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void hsm_ctor(state_machine_t* sm, const state_t* initial_state);
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void hsm_dtor(state_machine_t* sm);
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void hsm_transition_to(state_machine_t* sm, const state_t* state);
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const state_t* hsm_get_current_state(state_machine_t* sm);
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const state_t* hsm_get_previous_state(state_machine_t* sm);
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const char* hsm_get_state_name(const state_t* state);
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uint16_t hsm_get_state_value(const state_t* state);
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const char* hsm_get_current_state_name(state_machine_t* sm);
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uint16_t hsm_get_current_state_value(state_machine_t* sm);
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bool hsm_dispatch_event(state_machine_t* sm, uint32_t event, void* p_data);
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#ifdef __cplusplus
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}
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#endif
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#endif
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