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 "wifi_library_utils.h"
17 #include <dlfcn.h>
18 #include "wifi_logger.h"
19 namespace OHOS {
20 namespace Wifi {
21 DEFINE_WIFILOG_LABEL("WifiLibraryUtils");
WifiLibraryUtils(const std::string & libName,void * & libHandle,bool isDlClose)22 WifiLibraryUtils::WifiLibraryUtils(const std::string &libName, void*& libHandle, bool isDlClose)
23 : libHandle_(libHandle), libName_(libName), isDlClose_(isDlClose)
24 {
25 if (libName.empty()) {
26 return;
27 }
28 if (libHandle_ != nullptr) {
29 WIFI_LOGD("Library %s has been loaded", libName.c_str());
30 return;
31 }
32 libHandle_ = dlopen(libName.c_str(), RTLD_LAZY);
33 if (libHandle_ == nullptr) {
34 WIFI_LOGE("Failed to load library %s, error: %s", libName.c_str(), dlerror());
35 } else {
36 WIFI_LOGI("Library %s loaded successfully", libName.c_str());
37 }
38 }
39
~WifiLibraryUtils()40 WifiLibraryUtils::~WifiLibraryUtils()
41 {
42 if (isDlClose_ && libHandle_ != nullptr) {
43 if (dlclose(libHandle_) != 0) {
44 WIFI_LOGE("Failed to close library %s, error: %s", libName_.c_str(), dlerror());
45 } else {
46 WIFI_LOGI("Library %s closed successfully", libName_.c_str());
47 }
48 libHandle_ = nullptr;
49 }
50 }
51
GetFunction(const std::string & funcName)52 void* WifiLibraryUtils::GetFunction(const std::string &funcName)
53 {
54 if (libHandle_ == nullptr) {
55 WIFI_LOGE("Library %s is not loaded", libName_.c_str());
56 return nullptr;
57 }
58 void *func = dlsym(libHandle_, funcName.c_str());
59 if (func == nullptr) {
60 WIFI_LOGE("Failed to get function %s from library %s, error: %s",
61 funcName.c_str(), libName_.c_str(), dlerror());
62 }
63 return func;
64 }
65 } // namespace Wifi
66 } // namespace OHOS