0ad3017df7
1. move btif and A2DP source code from project directory to bluetooth directory; 2. some updates of audio source code;
118 lines
4.4 KiB
C
118 lines
4.4 KiB
C
/******************************************************************************
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*
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* Copyright (C) 2009-2012 Broadcom 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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******************************************************************************/
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/*****************************************************************************
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*
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* Filename: btif_sm.h
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*
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* Description: Generic BTIF state machine API
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*
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*****************************************************************************/
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#ifndef BTIF_SM_H
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#define BTIF_SM_H
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/*****************************************************************************
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** Constants & Macros
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******************************************************************************/
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/* Generic Enter/Exit state machine events */
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#define BTIF_SM_ENTER_EVT 0xFFFF
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#define BTIF_SM_EXIT_EVT 0xFFFE
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/*****************************************************************************
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** Type definitions and return values
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******************************************************************************/
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typedef UINT32 btif_sm_state_t;
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typedef UINT32 btif_sm_event_t;
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typedef void *btif_sm_handle_t;
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typedef BOOLEAN(*btif_sm_handler_t)(btif_sm_event_t event, void *data);
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/*****************************************************************************
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** Functions
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**
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** NOTE: THESE APIs SHOULD BE INVOKED ONLY IN THE BTIF CONTEXT
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**
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******************************************************************************/
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/*****************************************************************************
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**
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** Function btif_sm_init
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**
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** Description Initializes the state machine with the state handlers
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** The caller should ensure that the table and the corresponding
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** states match. The location that 'p_handlers' points to shall
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** be available until the btif_sm_shutdown API is invoked.
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**
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** Returns Returns a pointer to the initialized state machine handle.
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**
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******************************************************************************/
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btif_sm_handle_t btif_sm_init(const btif_sm_handler_t *p_handlers,
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btif_sm_state_t initial_state);
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/*****************************************************************************
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**
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** Function btif_sm_shutdown
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**
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** Description Tears down the state machine
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**
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** Returns None
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**
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******************************************************************************/
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void btif_sm_shutdown(btif_sm_handle_t handle);
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/*****************************************************************************
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**
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** Function btif_sm_get_state
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**
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** Description Fetches the current state of the state machine
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**
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** Returns Current state
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**
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******************************************************************************/
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btif_sm_state_t btif_sm_get_state(btif_sm_handle_t handle);
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/*****************************************************************************
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**
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** Function btif_sm_dispatch
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**
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** Description Dispatches the 'event' along with 'data' to the current state handler
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**
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** Returns Returns BT_STATUS_OK on success, BT_STATUS_FAIL otherwise
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**
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******************************************************************************/
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bt_status_t btif_sm_dispatch(btif_sm_handle_t handle, btif_sm_event_t event,
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void *data);
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/*****************************************************************************
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**
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** Function btif_sm_change_state
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**
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** Description Make a transition to the new 'state'. The 'BTIF_SM_EXIT_EVT'
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** shall be invoked before exiting the current state. The
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** 'BTIF_SM_ENTER_EVT' shall be invoked before entering the new state
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**
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**
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** Returns Returns BT_STATUS_OK on success, BT_STATUS_FAIL otherwise
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**
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******************************************************************************/
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bt_status_t btif_sm_change_state(btif_sm_handle_t handle, btif_sm_state_t state);
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#endif /* BTIF_SM_H */
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