1 /* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef LNN_STATE_MACHINE_H 17 #define LNN_STATE_MACHINE_H 18 19 #include "common_list.h" 20 #include "message_handler.h" 21 22 #ifdef __cplusplus 23 extern "C" { 24 #endif 25 26 #define FSM_FLAG_RUNNING 0x1 27 28 #define FSM_CTRL_MSG_START 0 29 #define FSM_CTRL_MSG_DATA 1 30 #define FSM_CTRL_MSG_STOP 2 31 #define FSM_CTRL_MSG_DEINIT 3 32 33 struct tagFsmStateMachine; 34 35 typedef void (*StateEnterFunc)(struct tagFsmStateMachine *fsm); 36 typedef void (*StateExitFunc)(struct tagFsmStateMachine *fsm); 37 typedef bool (*StateProcessFunc)(struct tagFsmStateMachine *fsm, int32_t msgType, void *para); 38 39 typedef struct { 40 ListNode list; 41 StateEnterFunc enter; 42 StateProcessFunc process; 43 StateExitFunc exit; 44 } FsmState; 45 46 typedef void (*FsmDeinitCallback)(struct tagFsmStateMachine *fsm); 47 48 typedef struct tagFsmStateMachine { 49 FsmState *curState; 50 uint32_t flag; 51 52 ListNode stateList; 53 SoftBusLooper *looper; 54 SoftBusHandler handler; 55 56 FsmDeinitCallback deinitCallback; 57 } FsmStateMachine; 58 59 typedef struct { 60 FsmStateMachine *fsm; 61 void *obj; 62 } FsmCtrlMsgObj; 63 64 int32_t LnnFsmInit(FsmStateMachine *fsm, SoftBusLooper *looper, char *name, FsmDeinitCallback cb); 65 int32_t LnnFsmDeinit(FsmStateMachine *fsm); 66 67 int32_t LnnFsmAddState(FsmStateMachine *fsm, FsmState *state); 68 69 int32_t LnnFsmStart(FsmStateMachine *fsm, FsmState *initialState); 70 int32_t LnnFsmStop(FsmStateMachine *fsm); 71 72 int32_t LnnFsmPostMessage(FsmStateMachine *fsm, uint32_t msgType, void *data); 73 int32_t LnnFsmPostMessageDelay(FsmStateMachine *fsm, uint32_t msgType, void *data, uint64_t delayMillis); 74 75 int32_t LnnFsmRemoveMessageByType(FsmStateMachine *fsm, int32_t what); 76 77 /* msgType value should not be 0 */ 78 int32_t LnnFsmRemoveMessage(FsmStateMachine *fsm, int32_t msgType); 79 int32_t LnnFsmRemoveMessageSpecific(FsmStateMachine *fsm, 80 int32_t (*customFunc)(const SoftBusMessage*, void*), void *args); 81 82 int32_t LnnFsmTransactState(FsmStateMachine *fsm, FsmState *state); 83 84 #ifdef __cplusplus 85 } 86 #endif 87 88 #endif 89