1 /*
2 * Copyright (c) 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 "database_adapter_loader.h"
17
18 #include <dlfcn.h>
19 #include <thread>
20 #include "account_log_wrapper.h"
21 #include "account_hisysevent_adapter.h"
22 #include "event_handler.h"
23 #include "event_runner.h"
24
25 namespace OHOS {
26 namespace AccountSA {
27 namespace {
28 const uint32_t DLCLOSE_SLEEP_TIME = 100;
29 };
GetInstance()30 DatabaseAdapterLoader &DatabaseAdapterLoader::GetInstance()
31 {
32 static DatabaseAdapterLoader instance;
33 return instance;
34 }
35
~DatabaseAdapterLoader()36 DatabaseAdapterLoader::~DatabaseAdapterLoader()
37 {
38 CheckAndUnload();
39 }
40
CheckAndUnload()41 bool DatabaseAdapterLoader::CheckAndUnload()
42 {
43 std::lock_guard<std::mutex> lock(loadMutex_);
44 if (handle_ == nullptr) {
45 ACCOUNT_LOGW("DatabaseAdapterLoader has not been loaded");
46 } else {
47 int32_t err = dlclose(handle_);
48 if (err != ERR_OK) {
49 char* errMsg = dlerror();
50 ACCOUNT_LOGE("Dlclose failed, err: %{public}d, errmsg: %{public}s", err, errMsg);
51 return false;
52 }
53 handle_ = nullptr;
54 std::this_thread::sleep_for(std::chrono::milliseconds(DLCLOSE_SLEEP_TIME));
55 }
56 createFunc_ = nullptr;
57 destroyFunc_ = nullptr;
58 return true;
59 }
60
CheckAndLoad()61 bool DatabaseAdapterLoader::CheckAndLoad()
62 {
63 std::lock_guard<std::mutex> lock(loadMutex_);
64 if ((handle_ != nullptr) && (createFunc_ != nullptr) && (destroyFunc_ != nullptr)) {
65 return true;
66 }
67
68 if (handle_ == nullptr) {
69 handle_ = dlopen("libaccount_database_adapter.z.so", RTLD_LAZY);
70 if (handle_ == nullptr) {
71 char* errMsg = dlerror();
72 ACCOUNT_LOGE("Load libaccount_database_adapter.z.so failed, errMsg: %{public}s", errMsg);
73 return false;
74 }
75 }
76 createFunc_ = reinterpret_cast<FUNC_CREATE>(dlsym(handle_, "CreateDataManager"));
77 if (createFunc_ == nullptr) {
78 char* errMsg = dlerror();
79 ACCOUNT_LOGE("Get createDataManager failed, errMsg: %{public}s", errMsg);
80 return false;
81 }
82 destroyFunc_ = reinterpret_cast<FUNC_DESTROY>(dlsym(handle_, "DestroyDataManager"));
83 if (destroyFunc_ == nullptr) {
84 char* errMsg = dlerror();
85 ACCOUNT_LOGE("Get destroyDataManager failed, errMsg: %{public}s", errMsg);
86 return false;
87 }
88 return true;
89 }
90
GetDataManager()91 std::shared_ptr<IDbAdapterDataManager> DatabaseAdapterLoader::GetDataManager()
92 {
93 if (!CheckAndLoad()) {
94 ACCOUNT_LOGE("Load kvstore adapter failed.");
95 return nullptr;
96 }
97 std::shared_ptr<IDbAdapterDataManager> dataManager(
98 createFunc_(),
99 [](IDbAdapterDataManager *ptr) {DatabaseAdapterLoader::GetInstance().DestroyDataManager(ptr);});
100 return dataManager;
101 }
102
DestroyDataManager(IDbAdapterDataManager * dataManager)103 void DatabaseAdapterLoader::DestroyDataManager(IDbAdapterDataManager* dataManager)
104 {
105 std::lock_guard<std::mutex> lock(loadMutex_);
106 if (destroyFunc_ == nullptr) {
107 ACCOUNT_LOGE("Destroy func is null, destroy failed.");
108 return;
109 }
110 destroyFunc_(dataManager);
111 }
112 } // namespace AccountSA
113 } // namespace OHOS