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 "plugin_lib.h"
17
18 #include <dlfcn.h>
19 #include <filesystem>
20 #include <string>
21
22 #include "avsession_log.h"
23
24 namespace OHOS::AVSession {
25
PluginLib(const std::string & libName)26 PluginLib::PluginLib(const std::string &libName)
27 : libName_(GetRealPath(libName)), handle_(nullptr)
28 {
29 if (!CheckPathExist(libName_)) {
30 SLOGE("%{public}s path invalid", libName_.c_str());
31 return;
32 }
33 handle_ = dlopen(libName_.c_str(), RTLD_NOW);
34 if (handle_ == nullptr) {
35 LogDlfcnErr("open lib failed");
36 return;
37 }
38 SLOGI("%{public}s open succ", libName_.c_str());
39 }
40
~PluginLib()41 PluginLib::~PluginLib()
42 {
43 #ifndef TEST_COVERAGE
44 if (handle_ == nullptr || dlclose(handle_) != 0) {
45 LogDlfcnErr("close lib failed");
46 }
47 #endif
48 SLOGI("%{public}s close succ", libName_.c_str());
49 }
50
LoadSymbol(const std::string & symbolName)51 void *PluginLib::LoadSymbol(const std::string &symbolName)
52 {
53 if (handle_ == nullptr) {
54 SLOGE("%{public}s lib is null", libName_.c_str());
55 return nullptr;
56 }
57 void *sym = dlsym(handle_, symbolName.c_str());
58 if (sym == nullptr) {
59 LogDlfcnErr("load symbol [" + symbolName + "] failed");
60 return nullptr;
61 }
62 SLOGI("%{public}s load symbol succ", symbolName.c_str());
63 return sym;
64 }
65
LogDlfcnErr(const std::string & desc)66 void PluginLib::LogDlfcnErr(const std::string &desc)
67 {
68 SLOGE("[%{public}s] %{public}s, reason = %{public}s",
69 libName_.c_str(), desc.c_str(), dlerror());
70 // reset errors
71 dlerror();
72 }
73
GetRealPath(const std::string & path)74 std::string PluginLib::GetRealPath(const std::string &path)
75 {
76 auto realPath = std::filesystem::weakly_canonical(path);
77 return realPath.string();
78 }
79
CheckPathExist(const std::string & path)80 bool PluginLib::CheckPathExist(const std::string &path)
81 {
82 return std::filesystem::exists(path);
83 }
84
85 } // namespace OHOS::AVSession