1 /* 2 * Copyright (C) 2022 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 package com.android.server.permission.access.util 18 19 import android.util.AtomicFile 20 import java.io.FileInputStream 21 import java.io.FileOutputStream 22 import java.io.IOException 23 24 /** 25 * Read from an [AtomicFile] and close everything safely when done. 26 */ 27 @Throws(IOException::class) readnull28inline fun AtomicFile.read(block: (FileInputStream) -> Unit) { 29 openRead().use(block) 30 } 31 32 /** 33 * Write to an [AtomicFile] and close everything safely when done. 34 */ 35 @Throws(IOException::class) 36 // Renamed to writeInlined() to avoid conflict with the hidden AtomicFile.write() that isn't inline. writeInlinednull37inline fun AtomicFile.writeInlined(block: (FileOutputStream) -> Unit) { 38 startWrite().use { 39 try { 40 block(it) 41 finishWrite(it) 42 } catch (t: Throwable) { 43 failWrite(it) 44 throw t 45 } 46 } 47 } 48