1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 /* 18 * JNI helper macros. 19 * 20 * Only intended to be used in the platform. 21 */ 22 23 #ifndef NATIVEHELPER_JNI_MACROS_H 24 #define NATIVEHELPER_JNI_MACROS_H 25 26 27 // Intended to construct a JNINativeMethod. 28 // (Assumes the C name is the ClassName_JavaMethodName). 29 #ifndef NATIVE_METHOD 30 #define NATIVE_METHOD(className, functionName, signature) \ 31 { #functionName, \ 32 signature, \ 33 _NATIVEHELPER_JNI_MACRO_CAST(void*) (className ## _ ## functionName) \ 34 } 35 #endif 36 37 // Intended to construct a JNINativeMethod (when the C name doesn't match the Java name). 38 // (Assumes the C name is the ClassName_Identifier). 39 #ifndef OVERLOADED_NATIVE_METHOD 40 #define OVERLOADED_NATIVE_METHOD(className, functionName, signature, identifier) \ 41 { #functionName, \ 42 signature, \ 43 _NATIVEHELPER_JNI_MACRO_CAST(void*) (className ## _ ## identifier) \ 44 } 45 #endif 46 47 // Used for methods that are annotated with @FastNative on the managed side. 48 // See NATIVE_METHOD for usage. 49 #ifndef FAST_NATIVE_METHOD 50 #define FAST_NATIVE_METHOD(className, functionName, signature) \ 51 { #functionName, \ 52 signature, \ 53 _NATIVEHELPER_JNI_MACRO_CAST(void*) (className ## _ ## functionName) \ 54 } 55 #endif 56 57 // Used for methods that are annotated with @FastNative on the managed side, 58 // and when the C-name doesn't match the Java-name. 59 // 60 // See OVERLOADED_NATIVE_METHOD for usage. 61 #ifndef OVERLOADED_FAST_NATIVE_METHOD 62 #define OVERLOADED_FAST_NATIVE_METHOD(className, functionName, signature, identifier) \ 63 { #functionName, \ 64 signature, \ 65 _NATIVEHELPER_JNI_MACRO_CAST(void*) (className ## _ ## identifier) \ 66 } 67 #endif 68 69 //////////////////////////////////////////////////////// 70 // IMPLEMENTATION ONLY. 71 // DO NOT USE DIRECTLY. 72 //////////////////////////////////////////////////////// 73 74 75 // C-style cast for C, C++-style cast for C++ to avoid warnings/errors. 76 #if defined(__cplusplus) 77 #define _NATIVEHELPER_JNI_MACRO_CAST(to) \ 78 reinterpret_cast<to> 79 #else 80 #define _NATIVEHELPER_JNI_MACRO_CAST(to) \ 81 (to) 82 #endif 83 84 #endif 85
