| /* |
| * Copyright (C) 2015 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. |
| */ |
| package com.android.ddmlib.utils; |
| |
| import com.android.annotations.concurrency.GuardedBy; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public class DebuggerPorts { |
| @GuardedBy("mDebuggerPorts") |
| private final List<Integer> mDebuggerPorts = new ArrayList<Integer>(); |
| |
| public DebuggerPorts(int basePort) { |
| mDebuggerPorts.add(basePort); |
| } |
| |
| public int next() { |
| // get the first port and remove it |
| synchronized (mDebuggerPorts) { |
| if (!mDebuggerPorts.isEmpty()) { |
| int port = mDebuggerPorts.get(0); |
| |
| // remove it. |
| mDebuggerPorts.remove(0); |
| |
| // if there's nothing left, add the next port to the list |
| if (mDebuggerPorts.isEmpty()) { |
| mDebuggerPorts.add(port+1); |
| } |
| |
| return port; |
| } |
| } |
| |
| return -1; |
| } |
| |
| public void free(int port) { |
| if (port <= 0) { |
| return; |
| } |
| |
| synchronized (mDebuggerPorts) { |
| // because there could be case where clients are closed twice, we have to make |
| // sure the port number is not already in the list. |
| if (mDebuggerPorts.indexOf(port) == -1) { |
| // add the port to the list while keeping it sorted. It's not like there's |
| // going to be tons of objects so we do it linearly. |
| int count = mDebuggerPorts.size(); |
| for (int i = 0; i < count; i++) { |
| if (port < mDebuggerPorts.get(i)) { |
| mDebuggerPorts.add(i, port); |
| break; |
| } |
| } |
| // TODO: check if we can compact the end of the list. |
| } |
| } |
| } |
| } |