1 /* 2 * Copyright (C) 2024 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 package com.android.ravenwood.common; 17 18 import java.io.FileDescriptor; 19 20 /** 21 * Class to host all the JNI methods used in ravenwood runtime. 22 */ 23 public class RavenwoodRuntimeNative { RavenwoodRuntimeNative()24 private RavenwoodRuntimeNative() { 25 } 26 27 static { RavenwoodCommonUtils.ensureOnRavenwood()28 RavenwoodCommonUtils.ensureOnRavenwood(); RavenwoodCommonUtils.loadRavenwoodNativeRuntime()29 RavenwoodCommonUtils.loadRavenwoodNativeRuntime(); 30 } 31 applyFreeFunction(long freeFunction, long nativePtr)32 public static native void applyFreeFunction(long freeFunction, long nativePtr); 33 nLseek(int fd, long offset, int whence)34 public static native long nLseek(int fd, long offset, int whence); 35 nPipe2(int flags)36 public static native int[] nPipe2(int flags); 37 nDup(int oldfd)38 public static native int nDup(int oldfd); 39 nFcntlInt(int fd, int cmd, int arg)40 public static native int nFcntlInt(int fd, int cmd, int arg); 41 lseek(FileDescriptor fd, long offset, int whence)42 public static long lseek(FileDescriptor fd, long offset, int whence) { 43 return nLseek(JvmWorkaround.getInstance().getFdInt(fd), offset, whence); 44 } 45 pipe2(int flags)46 public static FileDescriptor[] pipe2(int flags) { 47 var fds = nPipe2(flags); 48 var ret = new FileDescriptor[] { 49 new FileDescriptor(), 50 new FileDescriptor(), 51 }; 52 JvmWorkaround.getInstance().setFdInt(ret[0], fds[0]); 53 JvmWorkaround.getInstance().setFdInt(ret[1], fds[1]); 54 55 return ret; 56 } 57 dup(FileDescriptor fd)58 public static FileDescriptor dup(FileDescriptor fd) { 59 var fdInt = nDup(JvmWorkaround.getInstance().getFdInt(fd)); 60 61 var retFd = new java.io.FileDescriptor(); 62 JvmWorkaround.getInstance().setFdInt(retFd, fdInt); 63 return retFd; 64 } 65 fcntlInt(FileDescriptor fd, int cmd, int arg)66 public static int fcntlInt(FileDescriptor fd, int cmd, int arg) { 67 var fdInt = JvmWorkaround.getInstance().getFdInt(fd); 68 69 return nFcntlInt(fdInt, cmd, arg); 70 } 71 } 72