| /* |
| * Copyright 2018 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. |
| */ |
| |
| #pragma once |
| |
| #include "jni.h" |
| |
| struct JniConstants { |
| // Global reference to java.io.FileDescriptor. |
| static jclass GetFileDescriptorClass(JNIEnv* env); |
| |
| // java.io.FileDescriptor.descriptor. |
| static jfieldID GetFileDescriptorDescriptorField(JNIEnv* env); |
| |
| // java.io.FileDescriptor.ownerId. |
| static jfieldID GetFileDescriptorOwnerIdField(JNIEnv* env); |
| |
| // void java.io.FileDescriptor.<init>(). |
| static jmethodID GetFileDescriptorInitMethod(JNIEnv* env); |
| |
| // Global reference to java.nio.NIOAccess. |
| static jclass GetNioAccessClass(JNIEnv* env); |
| |
| // Object java.nio.NIOAccess.getBaseArray(Buffer); |
| static jmethodID GetNioAccessGetBaseArrayMethod(JNIEnv* env); |
| |
| // int java.nio.NIOAccess.getBaseArrayOffset(Buffer); |
| static jmethodID GetNioAccessGetBaseArrayOffsetMethod(JNIEnv* env); |
| |
| // Global reference to java.nio.Buffer. |
| static jclass GetNioBufferClass(JNIEnv* env); |
| |
| // long java.nio.Buffer.address |
| static jfieldID GetNioBufferAddressField(JNIEnv* env); |
| |
| // int java.nio.Buffer._elementSizeShift |
| static jfieldID GetNioBufferElementSizeShiftField(JNIEnv* env); |
| |
| // int java.nio.Buffer.limit; |
| static jfieldID GetNioBufferLimitField(JNIEnv* env); |
| |
| // int java.nio.Buffer.position; |
| static jfieldID GetNioBufferPositionField(JNIEnv* env); |
| |
| // Object java.nio.Buffer.array() |
| static jmethodID GetNioBufferArrayMethod(JNIEnv* env); |
| |
| // int java.nio.Buffer.arrayOffset() |
| static jmethodID GetNioBufferArrayOffsetMethod(JNIEnv* env); |
| |
| // Global reference to java.lang.ref.Reference. |
| static jclass GetReferenceClass(JNIEnv* env); |
| |
| // Object java.lang.ref.Reference.get() |
| static jmethodID GetReferenceGetMethod(JNIEnv* env); |
| |
| // Global reference to java.lang.String. |
| static jclass GetStringClass(JNIEnv* env); |
| |
| // Ensure class constants are initialized before use. Field and method |
| // constants are lazily initialized via getters. |
| static void EnsureClassReferencesInitialized(JNIEnv* env); |
| |
| // Ensure any cached heap objects from previous VM instances are |
| // invalidated. There is no notification here that a VM is destroyed so this |
| // method must be called when a new VM is created (and calls from any |
| // earlier VM's are completed). The caching of heap objects in this class is |
| // one reason why there is a limit of VM instance per process. |
| static void Uninitialize(); |
| }; |