| Index: third_party/go/src/golang.org/x/mobile/bind/java/Seq.java
|
| diff --git a/third_party/go/src/golang.org/x/mobile/bind/java/Seq.java b/third_party/go/src/golang.org/x/mobile/bind/java/Seq.java
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| deleted file mode 100644
|
| index 516a8751d1043c1799c98103ae4b8d1dc094e16a..0000000000000000000000000000000000000000
|
| --- a/third_party/go/src/golang.org/x/mobile/bind/java/Seq.java
|
| +++ /dev/null
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| @@ -1,251 +0,0 @@
|
| -package go;
|
| -
|
| -import android.util.Log;
|
| -import android.util.SparseArray;
|
| -import android.util.SparseIntArray;
|
| -
|
| -import java.util.concurrent.ExecutorService;
|
| -import java.util.concurrent.Executors;
|
| -
|
| -// Seq is a sequence of machine-dependent encoded values.
|
| -// Used by automatically generated language bindings to talk to Go.
|
| -public class Seq {
|
| - @SuppressWarnings("UnusedDeclaration")
|
| - private long memptr; // holds C-allocated pointer
|
| -
|
| - public Seq() {
|
| - ensure(64);
|
| - }
|
| -
|
| - // Ensure that at least size bytes can be written to the Seq.
|
| - // Any existing data in the buffer is preserved.
|
| - public native void ensure(int size);
|
| -
|
| - // Moves the internal buffer offset back to zero.
|
| - // Length and contents are maintained. Data can be read after a reset.
|
| - public native void resetOffset();
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| -
|
| - public native void log(String label);
|
| -
|
| - public native byte readInt8();
|
| - public native short readInt16();
|
| - public native int readInt32();
|
| - public native long readInt64();
|
| - public long readInt() { return readInt64(); }
|
| -
|
| - public native float readFloat32();
|
| - public native double readFloat64();
|
| - public native String readUTF16();
|
| - public native byte[] readByteArray();
|
| -
|
| - public native void writeInt8(byte v);
|
| - public native void writeInt16(short v);
|
| - public native void writeInt32(int v);
|
| - public native void writeInt64(long v);
|
| - public void writeInt(long v) { writeInt64(v); }
|
| -
|
| - public native void writeFloat32(float v);
|
| - public native void writeFloat64(double v);
|
| - public native void writeUTF16(String v);
|
| - public native void writeByteArray(byte[] v);
|
| -
|
| - public void writeRef(Ref ref) {
|
| - writeInt32(ref.refnum);
|
| - }
|
| -
|
| - public Ref readRef() {
|
| - int refnum = readInt32();
|
| - return tracker.get(refnum);
|
| - }
|
| -
|
| - // Informs the Go ref tracker that Java is done with this ref.
|
| - static native void destroyRef(int refnum);
|
| -
|
| - // createRef creates a Ref to a Java object.
|
| - public static Ref createRef(Seq.Object o) {
|
| - return tracker.createRef(o);
|
| - }
|
| -
|
| - // sends a function invocation request to Go.
|
| - //
|
| - // Blocks until the function completes.
|
| - // If the request is for a method, the first element in src is
|
| - // a Ref to the receiver.
|
| - public static native void send(String descriptor, int code, Seq src, Seq dst);
|
| -
|
| - // recv returns the next request from Go for a Java call.
|
| - static native void recv(Seq in, Receive params);
|
| -
|
| - // recvRes sends the result of a Java call back to Go.
|
| - static native void recvRes(int handle, Seq out);
|
| -
|
| - static final class Receive {
|
| - int refnum;
|
| - int code;
|
| - int handle;
|
| - }
|
| -
|
| - protected void finalize() throws Throwable {
|
| - super.finalize();
|
| - free();
|
| - }
|
| - private native void free();
|
| -
|
| - private static final ExecutorService receivePool = Executors.newCachedThreadPool();
|
| -
|
| - // receive listens for callback requests from Go, invokes them on a thread
|
| - // pool and sends the responses.
|
| - public static void receive() {
|
| - Seq.Receive params = new Seq.Receive();
|
| - while (true) {
|
| - final Seq in = new Seq();
|
| - Seq.recv(in, params);
|
| -
|
| - final int code = params.code;
|
| - final int handle = params.handle;
|
| - final int refnum = params.refnum;
|
| -
|
| - if (code == -1) {
|
| - // Special signal from seq.FinalizeRef.
|
| - tracker.dec(refnum);
|
| - Seq out = new Seq();
|
| - Seq.recvRes(handle, out);
|
| - continue;
|
| - }
|
| -
|
| - receivePool.execute(new Runnable() {
|
| - public void run() {
|
| - Ref r = tracker.get(refnum);
|
| - Seq out = new Seq();
|
| - r.obj.call(code, in, out);
|
| - Seq.recvRes(handle, out);
|
| - }
|
| - });
|
| - }
|
| - }
|
| -
|
| - // An Object is a Java object that matches a Go object.
|
| - // The implementation of the object may be in either Java or Go,
|
| - // with a proxy instance in the other language passing calls
|
| - // through to the other language.
|
| - //
|
| - // Don't implement an Object directly. Instead, look for the
|
| - // generated abstract Stub.
|
| - public interface Object {
|
| - public Ref ref();
|
| - public void call(int code, Seq in, Seq out);
|
| - }
|
| -
|
| - // A Ref is an object tagged with an integer for passing back and
|
| - // forth across the language boundary.
|
| - //
|
| - // A Ref may represent either an instance of a Java Object subclass,
|
| - // or an instance of a Go object. The explicit allocation of a Ref
|
| - // is used to pin Go object instances when they are passed to Java.
|
| - // The Go Seq library maintains a reference to the instance in a map
|
| - // keyed by the Ref number. When the JVM calls finalize, we ask Go
|
| - // to clear the entry in the map.
|
| - public static final class Ref {
|
| - // ref < 0: Go object tracked by Java
|
| - // ref > 0: Java object tracked by Go
|
| - int refnum;
|
| - public Seq.Object obj;
|
| -
|
| - private Ref(int refnum, Seq.Object o) {
|
| - this.refnum = refnum;
|
| - this.obj = o;
|
| - tracker.inc(refnum);
|
| - }
|
| -
|
| - @Override
|
| - protected void finalize() throws Throwable {
|
| - tracker.dec(refnum);
|
| - super.finalize();
|
| - }
|
| - }
|
| -
|
| - static final RefTracker tracker = new RefTracker();
|
| -
|
| - static final class RefTracker {
|
| - // Next Java object reference number.
|
| - //
|
| - // Reference numbers are positive for Java objects,
|
| - // and start, arbitrarily at a different offset to Go
|
| - // to make debugging by reading Seq hex a little easier.
|
| - private int next = 42; // next Java object ref
|
| -
|
| - // TODO(crawshaw): We could cut down allocations for frequently
|
| - // sent Go objects by maintaining a map to weak references. This
|
| - // however, would require allocating two objects per reference
|
| - // instead of one. It also introduces weak references, the bane
|
| - // of any Java debugging session.
|
| - //
|
| - // When we have real code, examine the tradeoffs.
|
| -
|
| - // Number of active references to a Go object. refnum -> count
|
| - private SparseIntArray goObjs = new SparseIntArray();
|
| -
|
| - // Java objects that have been passed to Go. refnum -> Ref
|
| - // The Ref obj field is non-null.
|
| - // This map pins Java objects so they don't get GCed while the
|
| - // only reference to them is held by Go code.
|
| - private SparseArray<Ref> javaObjs = new SparseArray<Ref>();
|
| -
|
| - // inc increments the reference count to a Go object.
|
| - synchronized void inc(int refnum) {
|
| - if (refnum > 0) {
|
| - return; // we don't count java objects
|
| - }
|
| - int count = goObjs.get(refnum);
|
| - if (count == Integer.MAX_VALUE) {
|
| - throw new RuntimeException("refnum " + refnum + " overflow");
|
| - }
|
| - goObjs.put(refnum, count+1);
|
| - }
|
| -
|
| - // dec decrements the reference count to a Go object.
|
| - // If the count reaches zero, the Go reference tracker is informed.
|
| - synchronized void dec(int refnum) {
|
| - if (refnum > 0) {
|
| - // Java objects are removed on request of Go.
|
| - javaObjs.remove(refnum);
|
| - return;
|
| - }
|
| - int count = goObjs.get(refnum);
|
| - if (count == 0) {
|
| - throw new RuntimeException("refnum " + refnum + " underflow");
|
| - }
|
| - count--;
|
| - if (count <= 0) {
|
| - goObjs.delete(refnum);
|
| - Seq.destroyRef(refnum);
|
| - } else {
|
| - goObjs.put(refnum, count);
|
| - }
|
| - }
|
| -
|
| - synchronized Ref createRef(Seq.Object o) {
|
| - // TODO(crawshaw): use single Ref for null.
|
| - if (next == Integer.MAX_VALUE) {
|
| - throw new RuntimeException("createRef overflow for " + o);
|
| - }
|
| - int refnum = next++;
|
| - Ref ref = new Ref(refnum, o);
|
| - javaObjs.put(refnum, ref);
|
| - return ref;
|
| - }
|
| -
|
| - // get returns an existing Ref to either a Java or Go object.
|
| - // It may be the first time we have seen the Go object.
|
| - synchronized Ref get(int refnum) {
|
| - if (refnum > 0) {
|
| - Ref ref = javaObjs.get(refnum);
|
| - if (ref == null) {
|
| - throw new RuntimeException("unknown java Ref: "+refnum);
|
| - }
|
| - return ref;
|
| - }
|
| - return new Ref(refnum, null);
|
| - }
|
| - }
|
| -}
|
|
|