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/******************************************************************************
* Copyright (C) 2017, The Linux Foundation. All rights reserved.
* Not a Contribution.
******************************************************************************/
/******************************************************************************
*
* Copyright (C) 2009-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/*****************************************************************************
*
* Filename: btif_sm.h
*
* Description: Generic BTIF state machine API
*
*****************************************************************************/
#ifndef BTIF_SM_H
#define BTIF_SM_H
#include <hardware/bluetooth.h>
#include "stack/include/bt_types.h"
/*****************************************************************************
* Constants & Macros
*****************************************************************************/
/* Generic Enter/Exit state machine events */
#define BTIF_SM_ENTER_EVT 0xFFFF
#define BTIF_SM_EXIT_EVT 0xFFFE
/*****************************************************************************
* Type definitions and return values
*****************************************************************************/
typedef uint32_t btif_sm_state_t;
typedef uint32_t btif_sm_event_t;
typedef void* btif_sm_handle_t;
typedef bool (*btif_sm_handler_t)(btif_sm_event_t event, void* data, int index);
/*****************************************************************************
* Functions
*
* NOTE: THESE APIs SHOULD BE INVOKED ONLY IN THE BTIF CONTEXT
*
*****************************************************************************/
/*****************************************************************************
*
* Function btif_sm_init
*
* Description Initializes the state machine with the state handlers
* The caller should ensure that the table and the corresponding
* states match. The location that 'p_handlers' points to shall
* be available until the btif_sm_shutdown API is invoked.
*
* Returns Returns a pointer to the initialized state machine handle.
*
*****************************************************************************/
btif_sm_handle_t btif_sm_init(const btif_sm_handler_t* p_handlers,
btif_sm_state_t initial_state, int index);
/*****************************************************************************
*
* Function btif_sm_shutdown
*
* Description Tears down the state machine
*
* Returns None
*
*****************************************************************************/
void btif_sm_shutdown(btif_sm_handle_t handle);
/*****************************************************************************
*
* Function btif_sm_get_state
*
* Description Fetches the current state of the state machine
*
* Returns Current state
*
*****************************************************************************/
btif_sm_state_t btif_sm_get_state(btif_sm_handle_t handle);
/*****************************************************************************
*
* Function btif_sm_dispatch
*
* Description Dispatches the 'event' along with 'data' to the current state
* handler
*
* Returns Returns BT_STATUS_OK on success, BT_STATUS_FAIL otherwise
*
*****************************************************************************/
bt_status_t btif_sm_dispatch(btif_sm_handle_t handle, btif_sm_event_t event,
void* data);
/*****************************************************************************
*
* Function btif_sm_change_state
*
* Description Make a transition to the new 'state'. The 'BTIF_SM_EXIT_EVT'
* shall be invoked before exiting the current state. The
* 'BTIF_SM_ENTER_EVT' shall be invoked before entering the new
* state
*
* Returns Returns BT_STATUS_OK on success, BT_STATUS_FAIL otherwise
*
*****************************************************************************/
bt_status_t btif_sm_change_state(btif_sm_handle_t handle,
btif_sm_state_t state);
#endif /* BTIF_SM_H */
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