| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef LIBNATIVEHELPER_INCLUDE_NATIVEHELPER_JNIINVOCATION_H_ |
| #define LIBNATIVEHELPER_INCLUDE_NATIVEHELPER_JNIINVOCATION_H_ |
| |
| #include "libnativehelper_api.h" |
| |
| #ifdef __cplusplus |
| |
| // JniInvocation adds a layer of indirection for applications using |
| // the JNI invocation API to allow the JNI implementation to be |
| // selected dynamically. Apps can specify a specific implementation to |
| // be used by calling InitJniInvocation. If this is not done, the |
| // library will chosen based on the value of Android system property |
| // persist.sys.dalvik.vm.lib on the device, and otherwise fall back to |
| // a hard-coded default implementation. |
| class JniInvocation final { |
| public: |
| JniInvocation() { |
| impl_ = JniInvocationCreate(); |
| } |
| |
| ~JniInvocation() { |
| JniInvocationDestroy(impl_); |
| } |
| |
| // Initialize JNI invocation API. library should specifiy a valid |
| // shared library for opening via dlopen providing a JNI invocation |
| // implementation, or null to allow defaulting via |
| // persist.sys.dalvik.vm.lib. |
| bool Init(const char* library) { |
| return JniInvocationInit(impl_, library) != 0; |
| } |
| |
| // Exposes which library is actually loaded from the given name. The |
| // buffer of size PROPERTY_VALUE_MAX will be used to load the system |
| // property for the default library, if necessary. If no buffer is |
| // provided, the fallback value will be used. |
| static const char* GetLibrary(const char* library, char* buffer) { |
| return JniInvocationGetLibrary(library, buffer); |
| } |
| |
| private: |
| JniInvocation(const JniInvocation&) = delete; |
| JniInvocation& operator=(const JniInvocation&) = delete; |
| |
| static const char* GetLibrary(const char* library, char* buffer, bool (*is_debuggable)(), |
| int (*get_library_system_property)(char* buffer)); |
| |
| JniInvocationImpl* impl_; |
| |
| friend class JNIInvocation_Debuggable_Test; |
| friend class JNIInvocation_NonDebuggable_Test; |
| }; |
| |
| #endif // __cplusplus |
| |
| #endif // LIBNATIVEHELPER_INCLUDE_NATIVEHELPER_JNIINVOCATION_H_ |