Add ipc module.

module-ipc/src/main/java/io/izzel/taboolib/module/ipc/MemoryMappedFile.java

@@ -0,0 +1,137 @@
+package io.izzel.taboolib.module.ipc;
+
+import io.izzel.taboolib.util.UNSAFE;
+import sun.nio.ch.FileChannelImpl;
+
+import java.lang.reflect.Method;
+import java.nio.channels.FileChannel;
+
+@SuppressWarnings("restriction")
+public class MemoryMappedFile {
+    private static final Method mmap;
+    private static final Method unmmap;
+    private static final int BYTE_ARRAY_OFFSET;
+
+    private long addr, size;
+
+    static {
+        try {
+            mmap = getMethod(FileChannelImpl.class, "map0", int.class, long.class, long.class);
+            unmmap = getMethod(FileChannelImpl.class, "unmap0", long.class, long.class);
+            BYTE_ARRAY_OFFSET = UNSAFE.arrayBaseOffset(byte[].class);
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private static Method getMethod(Class<?> cls, String name, Class<?>... params) throws Exception {
+        Method m = cls.getDeclaredMethod(name, params);
+        m.setAccessible(true);
+        return m;
+    }
+
+    protected MemoryMappedFile(FileChannel ch, long len) throws Exception {
+        this.size = len;
+        this.addr = (long) mmap.invoke(ch, 1, 0L, this.size);
+    }
+
+    protected void unmap() throws Exception {
+        unmmap.invoke(null, addr, this.size);
+    }
+
+    public long getAddress() {
+        return addr;
+    }
+
+    public byte getByte(long pos) {
+        return UNSAFE.getByte(pos + addr);
+    }
+
+    protected byte getByteVolatile(long pos) {
+        return UNSAFE.getByteVolatile(null, pos + addr);
+    }
+
+    public int getInt(long pos) {
+        return UNSAFE.getInt(pos + addr);
+    }
+
+    protected int getIntVolatile(long pos) {
+        return UNSAFE.getIntVolatile(null, pos + addr);
+    }
+
+    public long getLong(long pos) {
+        return UNSAFE.getLong(pos + addr);
+    }
+
+    protected long getLongVolatile(long pos) {
+        return UNSAFE.getLongVolatile(null, pos + addr);
+    }
+
+    public void putByte(long pos, byte val) {
+        UNSAFE.putByte(pos + addr, val);
+    }
+
+    protected void putByteVolatile(long pos, byte val) {
+        UNSAFE.putByteVolatile(null, pos + addr, val);
+    }
+
+    public void putInt(long pos, int val) {
+        UNSAFE.putInt(pos + addr, val);
+    }
+
+    protected void putIntVolatile(long pos, int val) {
+        UNSAFE.putIntVolatile(null, pos + addr, val);
+    }
+
+    public void putLong(long pos, long val) {
+        UNSAFE.putLong(pos + addr, val);
+    }
+
+    protected void putLongVolatile(long pos, long val) {
+        UNSAFE.putLongVolatile(null, pos + addr, val);
+    }
+
+    public void getBytes(long pos, byte[] data, int offset, int length) {
+        UNSAFE.copyMemory(null, pos + addr, data, BYTE_ARRAY_OFFSET + offset, length);
+    }
+
+    public void setBytes(long pos, byte[] data, int offset, int length) {
+        UNSAFE.copyMemory(data, BYTE_ARRAY_OFFSET + offset, null, pos + addr, length);
+    }
+
+    protected boolean compareAndSwapInt(long pos, int expected, int value) {
+        return UNSAFE.compareAndSwapInt(null, pos + addr, expected, value);
+    }
+
+    protected boolean compareAndSwapLong(long pos, long expected, long value) {
+        return UNSAFE.compareAndSwapLong(null, pos + addr, expected, value);
+    }
+
+    protected int getAndAddInt(long pos, int delta) {
+        return UNSAFE.getAndAddInt(null, pos + addr, delta);
+    }
+
+    protected long getAndAddLong(long pos, long delta) {
+        return UNSAFE.getAndAddLong(null, pos + addr, delta);
+    }
+
+    protected int addAndGetInt(long pos, int delta) {
+        return UNSAFE.getAndAddInt(null, pos + addr, delta) + delta;
+    }
+
+    protected long addAndGetLong(long pos, long delta) {
+        return UNSAFE.getAndAddLong(null, pos + addr, delta) + delta;
+    }
+
+    protected long getAndSetInt(long pos, int val) {
+        return UNSAFE.getAndSetInt(null, pos + addr, val);
+    }
+
+    protected long getAndSetLong(long pos, long val) {
+        return UNSAFE.getAndSetLong(null, pos + addr, val);
+    }
+
+    protected void setMemory(long pos, long bytes, byte value) {
+        UNSAFE.setMemory(pos + addr, bytes, value);
+    }
+}

module-ipc/src/main/java/io/izzel/taboolib/module/ipc/MessageBlock.java

@@ -0,0 +1,140 @@
+package io.izzel.taboolib.module.ipc;
+
+public class MessageBlock {
+
+    private final MemoryMappedFile file;
+    private final long baseOffset;
+    private final long size;
+
+    public MessageBlock(MemoryMappedFile file, long baseOffset, long size) {
+        this.file = file;
+        this.baseOffset = baseOffset;
+        this.size = size;
+    }
+
+    public void reset() {
+        int id = getId();
+        file.setMemory(baseOffset, size, (byte) 0x00);
+        putInt(0, id);
+    }
+
+    public int getId() {
+        return getInt(0);
+    }
+
+    public long getTimestamp() {
+        return getLong(4);
+    }
+
+    public void updateTimestamp() {
+        putLong(4, System.currentTimeMillis());
+    }
+
+    public long getSize() {
+        return size;
+    }
+
+    public long getPayloadSize() {
+        return size - 64;
+    }
+
+    public long getAddress() {
+        return file.getAddress() + baseOffset;
+    }
+
+    public byte getByte(long pos) {
+        return file.getByte(mapAddress(pos));
+    }
+
+    public byte getByteVolatile(long pos) {
+        return file.getByteVolatile(mapAddress(pos));
+    }
+
+    public int getInt(long pos) {
+        return file.getInt(mapAddress(pos));
+    }
+
+    public int getIntVolatile(long pos) {
+        return file.getIntVolatile(mapAddress(pos));
+    }
+
+    public long getLong(long pos) {
+        return file.getLong(mapAddress(pos));
+    }
+
+    public long getLongVolatile(long pos) {
+        return file.getLongVolatile(mapAddress(pos));
+    }
+
+    public void putByte(long pos, byte val) {
+        file.putByte(mapAddress(pos), val);
+    }
+
+    public void putByteVolatile(long pos, byte val) {
+        file.putByteVolatile(mapAddress(pos), val);
+    }
+
+    public void putInt(long pos, int val) {
+        file.putInt(mapAddress(pos), val);
+    }
+
+    public void putIntVolatile(long pos, int val) {
+        file.putIntVolatile(mapAddress(pos), val);
+    }
+
+    public void putLong(long pos, long val) {
+        file.putLong(mapAddress(pos), val);
+    }
+
+    public void putLongVolatile(long pos, long val) {
+        file.putLongVolatile(mapAddress(pos), val);
+    }
+
+    public void getBytes(long pos, byte[] data, int offset, int length) {
+        file.getBytes(mapAddress(pos), data, offset, length);
+    }
+
+    public void setBytes(long pos, byte[] data, int offset, int length) {
+        file.setBytes(mapAddress(pos), data, offset, length);
+    }
+
+    public boolean compareAndSwapInt(long pos, int expected, int value) {
+        return file.compareAndSwapInt(mapAddress(pos), expected, value);
+    }
+
+    public boolean compareAndSwapLong(long pos, long expected, long value) {
+        return file.compareAndSwapLong(mapAddress(pos), expected, value);
+    }
+
+    public int getAndAddInt(long pos, int delta) {
+        return file.getAndAddInt(mapAddress(pos), delta);
+    }
+
+    public long getAndAddLong(long pos, long delta) {
+        return file.getAndAddLong(mapAddress(pos), delta);
+    }
+
+    public int addAndGetInt(long pos, int delta) {
+        return file.addAndGetInt(mapAddress(pos), delta);
+    }
+
+    public long addAndGetLong(long pos, long delta) {
+        return file.addAndGetLong(mapAddress(pos), delta);
+    }
+
+    public long getAndSetInt(long pos, int val) {
+        return file.getAndSetInt(mapAddress(pos), val);
+    }
+
+    public long getAndSetLong(long pos, long val) {
+        return file.getAndSetLong(mapAddress(pos), val);
+    }
+
+    private long mapAddress(long pos) {
+        if (pos < size) {
+            return baseOffset + pos;
+        } else {
+            throw new IllegalArgumentException();
+        }
+    }
+}

module-ipc/src/main/java/io/izzel/taboolib/module/ipc/TabooIpcClient.java

@@ -0,0 +1,19 @@
+package io.izzel.taboolib.module.ipc;
+
+public interface TabooIpcClient {
+
+    boolean connect(TabooIpcConfig config) throws Exception;
+
+    void disconnect() throws Exception;
+
+    boolean sendMessage(byte[] bytes, int index, int length, MessageBlock target);
+
+    default boolean sendMessage(byte[] bytes, MessageBlock target) {
+        return sendMessage(bytes, 0, bytes.length, target);
+    }
+
+    boolean readMessage(byte[] buf);
+
+    int getId();
+
+}

module-ipc/src/main/java/io/izzel/taboolib/module/ipc/TabooIpcClientImpl.java

@@ -0,0 +1,87 @@
+package io.izzel.taboolib.module.ipc;
+
+import java.io.RandomAccessFile;
+import java.nio.channels.FileChannel;
+
+public class TabooIpcClientImpl implements TabooIpcClient {
+
+    private volatile boolean available = false;
+    private MemoryMappedFile file;
+    private int id;
+    private MessageBlock block;
+
+    @Override
+    public synchronized boolean connect(TabooIpcConfig config) throws Exception {
+        if (available) throw new IllegalStateException();
+        long size = round(config.memorySize());
+        long blockSize = round(config.blockSize());
+        if (blockSize < 128 || size < (blockSize << 1) || size % blockSize != 0) return false;
+        try (RandomAccessFile raf = new RandomAccessFile(config.fileLocation(), "rw")) {
+            raf.setLength(size);
+            try (FileChannel channel = raf.getChannel()) {
+                this.file = new MemoryMappedFile(channel, size);
+                this.id = file.getAndAddInt(0, 1);
+                if (!login(size, blockSize, config.timeout())) {
+                    this.file.unmap();
+                    return available = false;
+                }
+                return available = true;
+            }
+        }
+    }
+
+    @Override
+    public synchronized void disconnect() throws Exception {
+        if (!available) throw new IllegalStateException();
+        if (file != null) file.unmap();
+        available = false;
+    }
+
+    @Override
+    public boolean sendMessage(byte[] bytes, int index, int length, MessageBlock target) {
+        if (!available) throw new IllegalStateException();
+        if (bytes.length < length || target.getPayloadSize() < length)
+            throw new IllegalArgumentException("message too long");
+        if (target.compareAndSwapInt(16, 0, 1)) {
+            target.setBytes(64, bytes, index, length);
+            return target.compareAndSwapInt(16, 1, 2);
+        } else return false;
+    }
+
+    @Override
+    public boolean readMessage(byte[] buf) {
+        if (!available) throw new IllegalStateException();
+        if (this.block.getInt(16) == 2) {
+            this.block.getBytes(64, buf, 0, (int) this.block.getPayloadSize());
+            return this.block.compareAndSwapInt(16, 2, 0);
+        } else return false;
+    }
+
+    @Override
+    public int getId() {
+        if (!available) throw new IllegalStateException();
+        return id;
+    }
+
+    private boolean login(long size, long blockSize, long timeout) {
+        long offset = blockSize;
+        while (offset < size) {
+            int prevId = file.getInt(offset);
+            long cur = System.currentTimeMillis();
+            long prev = file.getAndSetLong(offset + 4, cur);
+            if (Math.abs(prev - cur) > timeout) {
+                if (file.compareAndSwapInt(offset, prevId, id)) {
+                    this.block = new MessageBlock(file, offset, blockSize);
+                    this.block.reset();
+                    return true;
+                }
+            }
+            offset += blockSize;
+        }
+        return false;
+    }
+
+    private static long round(long i) {
+        return (i + 0xfffL) & ~0xfffL;
+    }
+}

module-ipc/src/main/java/io/izzel/taboolib/module/ipc/TabooIpcConfig.java

@@ -0,0 +1,22 @@
+package io.izzel.taboolib.module.ipc;
+
+public interface TabooIpcConfig {
+
+    default long memorySize() {
+        return 1 << 24;
+    }
+
+    default long blockSize() {
+        return 1 << 14;
+    }
+
+    default long period() {
+        return 10;
+    }
+
+    default long timeout() {
+        return 60 * 1000;
+    }
+
+    String fileLocation();
+}

settings.gradle

@@ -1,3 +1,4 @@
 rootProject.name = 'TabooLib'
 include 'injector'
+include 'module-ipc'