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 #define MLOG_TAG "EnhancementDynamicLoader"
17
18 #include "dynamic_loader.h"
19
20 #include <dlfcn.h>
21 #include "media_log.h"
22 #include "medialibrary_tracer.h"
23
24 namespace OHOS {
25 namespace Media {
26 using namespace std;
27 static const char *K_LIBRARY_SUFFIX = ".so";
DynamicLoader()28 DynamicLoader::DynamicLoader()
29 {
30 MEDIA_INFO_LOG("EnhancementDynamicLoader ctor");
31 }
32
~DynamicLoader()33 DynamicLoader::~DynamicLoader()
34 {
35 MEDIA_INFO_LOG("EnhancementDynamicLoader dtor");
36 for (auto iterator = dynamicLibHandle_.begin(); iterator != dynamicLibHandle_.end(); ++iterator) {
37 dlclose(iterator->second);
38 MEDIA_INFO_LOG("close library media_cloud_enhancement_dynamic success: %{public}s", iterator->first.c_str());
39 }
40 }
41
OpenDynamicHandle(std::string dynamicLibrary)42 void* DynamicLoader::OpenDynamicHandle(std::string dynamicLibrary)
43 {
44 MediaLibraryTracer tracer;
45 tracer.Start("EnhancementDynamicLoader::OpenDynamicHandle");
46 std::lock_guard loaderLock(libLock_);
47 if (!EndsWith(dynamicLibrary, K_LIBRARY_SUFFIX)) {
48 MEDIA_ERR_LOG("CloseDynamicHandle with error name!");
49 return nullptr;
50 }
51 if (dynamicLibHandle_[dynamicLibrary] == nullptr) {
52 void* dynamicLibHandle = dlopen(dynamicLibrary.c_str(), RTLD_NOW);
53 if (dynamicLibHandle == nullptr) {
54 MEDIA_ERR_LOG("Failed to open %{public}s, reason: %{public}sn", dynamicLibrary.c_str(), dlerror());
55 return nullptr;
56 }
57 MEDIA_INFO_LOG("open library %{public}s success", dynamicLibrary.c_str());
58 dynamicLibHandle_[dynamicLibrary] = dynamicLibHandle;
59 }
60 return dynamicLibHandle_[dynamicLibrary];
61 }
62
GetFunction(const string dynamicLibrary,const string function)63 void* DynamicLoader::GetFunction(const string dynamicLibrary, const string function)
64 {
65 MediaLibraryTracer tracer;
66 tracer.Start("EnhancementDynamicLoader::GetFunction");
67 std::lock_guard loaderLock(libLock_);
68 // if not opened, then open directly
69 if (dynamicLibHandle_[dynamicLibrary] == nullptr) {
70 OpenDynamicHandle(dynamicLibrary);
71 }
72
73 void* handle = nullptr;
74 if (dynamicLibHandle_[dynamicLibrary] != nullptr) {
75 handle = dlsym(dynamicLibHandle_[dynamicLibrary], function.c_str());
76 if (handle == nullptr) {
77 MEDIA_ERR_LOG("Failed to load %{public}s, reason: %{public}sn", function.c_str(), dlerror());
78 return nullptr;
79 }
80 MEDIA_INFO_LOG("GetFunction %{public}s success", function.c_str());
81 }
82 return handle;
83 }
84
CloseDynamicHandle(std::string dynamicLibrary)85 void DynamicLoader::CloseDynamicHandle(std::string dynamicLibrary)
86 {
87 MediaLibraryTracer tracer;
88 tracer.Start("EnhancementDynamicLoader::CloseDynamicHandle");
89 std::lock_guard loaderLock(libLock_);
90 if (!EndsWith(dynamicLibrary, K_LIBRARY_SUFFIX)) {
91 MEDIA_ERR_LOG("CloseDynamicHandle with error name!");
92 return;
93 }
94 if (dynamicLibHandle_[dynamicLibrary] != nullptr) {
95 dlclose(dynamicLibHandle_[dynamicLibrary]);
96 dynamicLibHandle_[dynamicLibrary] = nullptr;
97 MEDIA_INFO_LOG("close library media_cloud_enhancement_dynamic success: %{public}s",
98 dynamicLibrary.c_str());
99 }
100 }
101 } // namespace Camera
102 } // namespace OHOS