am 03af0c42: Merge "Ensure that RandomAccessFile is not leaked." into lmp-dev (6cbef4bd) · Commits · e / os / android_frameworks_base

tools/layoutlib/bridge/src/com/android/layoutlib/bridge/libcore/io/BridgeBufferIterator.java

+15 −28

Original line number	Diff line number	Diff line
		@@ -16,74 +16,61 @@

		package com.android.layoutlib.bridge.libcore.io;

		import java.nio.MappedByteBuffer;
		import java.nio.ByteBuffer;

		import libcore.io.BufferIterator;

		/**
		* Provides an implementation of {@link BufferIterator} over a {@link MappedByteBuffer}.
		* Provides an implementation of {@link BufferIterator} over a {@link ByteBuffer}.
		*/
		public class BridgeBufferIterator extends BufferIterator {

		private int mPosition;
		private final long mSize;
		private final MappedByteBuffer mMappedByteBuffer;
		private final ByteBuffer mByteBuffer;

		public BridgeBufferIterator(long size, MappedByteBuffer buffer) {
		public BridgeBufferIterator(long size, ByteBuffer buffer) {
		mSize = size;
		mMappedByteBuffer = buffer;
		mByteBuffer = buffer;
		}

		@Override
		public void seek(int offset) {
		assert offset < mSize;
		mPosition = offset;
		assert offset <= mSize;
		mByteBuffer.position(offset);
		}

		@Override
		public void skip(int byteCount) {
		assert mPosition + byteCount <= mSize;
		mPosition += byteCount;
		int newPosition = mByteBuffer.position() + byteCount;
		assert newPosition <= mSize;
		mByteBuffer.position(newPosition);
		}

		@Override
		public void readByteArray(byte[] dst, int dstOffset, int byteCount) {
		assert dst.length >= dstOffset + byteCount;
		mMappedByteBuffer.position(mPosition);
		mMappedByteBuffer.get(dst, dstOffset, byteCount);
		mPosition = mMappedByteBuffer.position();
		mByteBuffer.get(dst, dstOffset, byteCount);
		}

		@Override
		public byte readByte() {
		mMappedByteBuffer.position(mPosition);
		byte b = mMappedByteBuffer.get();
		mPosition = mMappedByteBuffer.position();
		return b;
		return mByteBuffer.get();
		}

		@Override
		public int readInt() {
		mMappedByteBuffer.position(mPosition);
		int i = mMappedByteBuffer.getInt();
		mPosition = mMappedByteBuffer.position();
		return i;
		return mByteBuffer.getInt();
		}

		@Override
		public void readIntArray(int[] dst, int dstOffset, int intCount) {
		mMappedByteBuffer.position(mPosition);
		while (--intCount >= 0) {
		dst[dstOffset++] = mMappedByteBuffer.getInt();
		dst[dstOffset++] = mByteBuffer.getInt();
		}
		mPosition = mMappedByteBuffer.position();
		}

		@Override
		public short readShort() {
		mMappedByteBuffer.position(mPosition);
		short s = mMappedByteBuffer.getShort();
		mPosition = mMappedByteBuffer.position();
		return s;
		return mByteBuffer.getShort();
		}
		}

tools/layoutlib/bridge/src/libcore/io/MemoryMappedFile_Delegate.java

+19 −10

Original line number	Diff line number	Diff line
		@@ -25,6 +25,7 @@ import android.system.ErrnoException;
		import java.io.File;
		import java.io.IOException;
		import java.io.RandomAccessFile;
		import java.nio.ByteOrder;
		import java.nio.MappedByteBuffer;
		import java.nio.channels.FileChannel.MapMode;
		import java.util.HashMap;
		@@ -59,15 +60,22 @@ public class MemoryMappedFile_Delegate {
		}
		path = path.substring(TARGET_PATH.length());
		try {
		RandomAccessFile file = new RandomAccessFile(new File(sRootPath, path), "r");
		File f = new File(sRootPath, path);
		if (!f.exists()) {
		throw new ErrnoException("File not found: " + f.getPath(), 1);
		}
		RandomAccessFile file = new RandomAccessFile(f, "r");
		try {
		long size = file.length();
		MemoryMappedFile_Delegate newDelegate = new MemoryMappedFile_Delegate(file);
		long filePointer = file.getFilePointer();
		MemoryMappedFile mmFile = new MemoryMappedFile(filePointer, size);
		long delegateIndex = sManager.addNewDelegate(newDelegate);
		sMemoryMappedFileMap.put(mmFile, delegateIndex);
		file.close(); // Also closes the channel opened by the delegate constructor.
		return mmFile;
		} finally {
		file.close();
		}
		} catch (IOException e) {
		throw new ErrnoException("mmapRO", 1, e);
		}
		@@ -85,7 +93,7 @@ public class MemoryMappedFile_Delegate {
		@LayoutlibDelegate
		static BufferIterator bigEndianIterator(MemoryMappedFile file) {
		MemoryMappedFile_Delegate delegate = getDelegate(file);
		return new BridgeBufferIterator(delegate.mSize, delegate.mMappedByteBuffer);
		return new BridgeBufferIterator(delegate.mSize, delegate.mMappedByteBuffer.duplicate());
		}

		// TODO: implement littleEndianIterator()
		@@ -95,6 +103,7 @@ public class MemoryMappedFile_Delegate {
		// It's weird that map() takes size as long, but returns MappedByteBuffer which uses an int
		// to store the marker to the position.
		mMappedByteBuffer = file.getChannel().map(MapMode.READ_ONLY, 0, mSize);
		assert mMappedByteBuffer.order() == ByteOrder.BIG_ENDIAN;
		}

		public static void setDataDir(File path) {