1 /* 2 * Copyright (C) 2021 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 #ifndef OHOS_IPC_JNI_HELPERS_H 17 #define OHOS_IPC_JNI_HELPERS_H 18 19 #include <jni.h> 20 21 namespace OHOS { 22 class JNIEnvHelper { 23 public: 24 JNIEnvHelper(); 25 ~JNIEnvHelper(); 26 JNIEnv *Get(); 27 JNIEnv *operator->(); 28 static void nativeInit(JavaVM *vm); 29 30 private: 31 JNIEnvHelper(const JNIEnvHelper &) = delete; 32 JNIEnvHelper &operator = (const JNIEnvHelper &) = delete; 33 34 private: 35 JNIEnv *env_; 36 bool nativeThread_; 37 static JavaVM *javaVm_; 38 }; 39 void JniHelperThrowException(JNIEnv *env, const char *className, const char *msg); 40 void JniHelperThrowNullPointerException(JNIEnv *env, const char *msg); 41 void JniHelperThrowIllegalStateException(JNIEnv *env, const char *msg); 42 43 44 /* 45 * JNI may throws exception when native code call java scenario. 46 * we should convert local exception to native status code. 47 * Check and clear local exception. 48 */ 49 jboolean JniHelperCheckAndClearLocalException(JNIEnv *env); 50 51 /* 52 * Get an int file descriptor from a java.io.FileDescriptor 53 */ 54 int JniHelperJavaIoGetFdFromFileDescriptor(JNIEnv *env, jobject fileDescriptor); 55 56 /* 57 * Set the descriptor of a java.io.FileDescriptor 58 */ 59 void JniHelperJavaIoSetFdToFileDescriptor(JNIEnv *env, jobject fileDescriptor, int value); 60 61 /* 62 * Create a java.io.FileDescriptor given an integer fd 63 */ 64 jobject JniHelperJavaIoCreateFileDescriptor(JNIEnv *env, int fd); 65 66 int JniHelperRegisterNativeMethods(JNIEnv *env); 67 } // namespace OHOS 68 #endif // OHOS_IPC_JNI_HELPERS_H 69