1 /*
2 * Copyright (c) 2021-2024 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 #include "softbus_client_event_manager.h"
17
18 #include "comm_log.h"
19 #include "softbus.h"
20 #include "softbus_adapter_mem.h"
21 #include "softbus_adapter_thread.h"
22 #include "softbus_errcode.h"
23 #include "softbus_utils.h"
24
25 #define MAX_OBSERVER_CNT 128
26
27 typedef struct {
28 ListNode node;
29 enum SoftBusEvent event;
30 EventCallback callback;
31 char *userData;
32 } Observer;
33
34 static SoftBusList *g_observerList = NULL;
35 static bool g_isInit = false;
36
EventClientInit(void)37 int EventClientInit(void)
38 {
39 if (g_isInit) {
40 return SOFTBUS_OK;
41 }
42
43 if (g_observerList != NULL) {
44 DestroySoftBusList(g_observerList);
45 }
46 g_observerList = CreateSoftBusList();
47 if (g_observerList == NULL) {
48 COMM_LOGE(COMM_SDK, "create observer list failed");
49 return SOFTBUS_MALLOC_ERR;
50 }
51
52 g_isInit = true;
53 return SOFTBUS_OK;
54 }
55
EventClientDeinit(void)56 void EventClientDeinit(void)
57 {
58 if (!g_isInit) {
59 COMM_LOGE(COMM_SDK, "event client not init");
60 return;
61 }
62 if (g_observerList != NULL) {
63 DestroySoftBusList(g_observerList);
64 g_observerList = NULL;
65 }
66
67 g_isInit = false;
68 }
69
IsEventValid(enum SoftBusEvent event)70 static bool IsEventValid(enum SoftBusEvent event)
71 {
72 if (event < EVENT_SERVER_DEATH || event >= EVENT_BUTT) {
73 return false;
74 }
75 return true;
76 }
77
RegisterEventCallback(enum SoftBusEvent event,EventCallback cb,void * userData)78 int RegisterEventCallback(enum SoftBusEvent event, EventCallback cb, void *userData)
79 {
80 if (!IsEventValid(event) || cb == NULL) {
81 COMM_LOGE(COMM_SDK, "invalid param");
82 return SOFTBUS_INVALID_PARAM;
83 }
84
85 if (g_isInit != true) {
86 COMM_LOGE(COMM_SDK, "event manager not init");
87 return SOFTBUS_NO_INIT;
88 }
89
90 if (SoftBusMutexLock(&g_observerList->lock) != SOFTBUS_OK) {
91 COMM_LOGE(COMM_SDK, "lock failed");
92 return SOFTBUS_LOCK_ERR;
93 }
94
95 if (g_observerList->cnt >= MAX_OBSERVER_CNT) {
96 COMM_LOGE(COMM_SDK, "observer count over limit");
97 (void)SoftBusMutexUnlock(&g_observerList->lock);
98 return SOFTBUS_TRANS_OBSERVER_EXCEED_LIMIT;
99 }
100
101 Observer *observer = (Observer *)SoftBusCalloc(sizeof(Observer));
102 if (observer == NULL) {
103 COMM_LOGE(COMM_SDK, "malloc observer failed");
104 (void)SoftBusMutexUnlock(&g_observerList->lock);
105 return SOFTBUS_MALLOC_ERR;
106 }
107
108 observer->event = event;
109 observer->callback = cb;
110 observer->userData = (char *)userData;
111
112 ListInit(&observer->node);
113 ListAdd(&g_observerList->list, &observer->node);
114 g_observerList->cnt++;
115 (void)SoftBusMutexUnlock(&g_observerList->lock);
116 return SOFTBUS_OK;
117 }
118
CLIENT_NotifyObserver(enum SoftBusEvent event,void * arg,unsigned int argLen)119 void CLIENT_NotifyObserver(enum SoftBusEvent event, void *arg, unsigned int argLen)
120 {
121 if (!IsEventValid(event)) {
122 COMM_LOGE(COMM_SDK, "invalid event. event=%{public}d", event);
123 return;
124 }
125
126 if (g_isInit != true) {
127 COMM_LOGE(COMM_SDK, "event manager not init");
128 return;
129 }
130
131 Observer *observer = NULL;
132 if (SoftBusMutexLock(&g_observerList->lock) != SOFTBUS_OK) {
133 COMM_LOGE(COMM_SDK, "lock failed");
134 return;
135 }
136
137 LIST_FOR_EACH_ENTRY(observer, &g_observerList->list, Observer, node) {
138 if ((observer->event == event) && (observer->callback != NULL) &&
139 (observer->callback(arg, argLen, observer->userData) != SOFTBUS_OK)) {
140 COMM_LOGE(COMM_SDK, "execute callback failed. event=%{public}d", event);
141 }
142 }
143
144 (void)SoftBusMutexUnlock(&g_observerList->lock);
145 }
146