Merge "Naming fix and add comments" (3c03d5bd) · Commits · e / os / android_frameworks_base

core/java/android/os/Binder.java

+32 −13

Original line number	Diff line number	Diff line
		@@ -21,7 +21,6 @@ import android.util.Log;
		import android.util.Slog;

		import com.android.internal.util.FastPrintWriter;
		import com.android.internal.util.FunctionalUtils;
		import com.android.internal.util.FunctionalUtils.ThrowingRunnable;
		import com.android.internal.util.FunctionalUtils.ThrowingSupplier;

		@@ -714,7 +713,15 @@ public class Binder implements IBinder {
		}
		}

		/**
		* Java proxy for a native IBinder object.
		* Allocated and constructed by the native javaObjectforIBinder function. Never allocated
		* directly from Java code.
		*/
		final class BinderProxy implements IBinder {
		// See android_util_Binder.cpp for the native half of this.
		// TODO: Consider using NativeAllocationRegistry instead of finalization.

		// Assume the process-wide default value when created
		volatile boolean mWarnOnBlocking = Binder.sWarnOnBlocking;

		@@ -833,7 +840,19 @@ final class BinderProxy implements IBinder {
		}
		}

		// This WeakReference to "this" is used only by native code to "attach" to the
		// native IBinder object.
		// Using WeakGlobalRefs instead currently appears unsafe, in that they can yield a
		// non-null value after the BinderProxy is enqueued for finalization.
		// Used only once immediately after construction.
		// TODO: Consider making the extra native-to-java call to compute this on the fly.
		final private WeakReference mSelf;

		// Native pointer to the wrapped native IBinder object. Counted as strong reference.
		private long mObject;

		// Native pointer to native DeathRecipientList. Counted as strong reference.
		// Basically owned by the JavaProxy object. Reference counted only because DeathRecipients
		// hold a weak reference that can be temporarily promoted.
		private long mOrgue;
		}

core/jni/android_util_Binder.cpp

+5 −5

Original line number	Diff line number	Diff line
		@@ -488,8 +488,8 @@ protected:

		private:
		JavaVM* const mVM;
		jobject mObject;
		jweak mObjectWeak; // will be a weak ref to the same VM-side DeathRecipient after binderDied()
		jobject mObject; // Initial strong ref to Java-side DeathRecipient. Cleared on binderDied().
		jweak mObjectWeak; // weak ref to the same Java-side DeathRecipient after binderDied().
		wp<DeathRecipientList> mList;
		};

		@@ -561,7 +561,7 @@ static void proxy_cleanup(const void* id, void* obj, void* cleanupCookie)
		env->DeleteGlobalRef((jobject)obj);
		}

		static Mutex mProxyLock;
		static Mutex gProxyLock;

		jobject javaObjectForIBinder(JNIEnv* env, const sp<IBinder>& val)
		{
		@@ -576,7 +576,7 @@ jobject javaObjectForIBinder(JNIEnv* env, const sp<IBinder>& val)

		// For the rest of the function we will hold this lock, to serialize
		// looking/creation/destruction of Java proxies for native Binder proxies.
		AutoMutex _l(mProxyLock);
		AutoMutex _l(gProxyLock);

		// Someone else's... do we know about it?
		jobject object = (jobject)val->findObject(&gBinderProxyOffsets);
		@@ -1252,7 +1252,7 @@ static jboolean android_os_BinderProxy_unlinkToDeath(JNIEnv* env, jobject obj,
		static void android_os_BinderProxy_destroy(JNIEnv* env, jobject obj)
		{
		// Don't race with construction/initialization
		AutoMutex _l(mProxyLock);
		AutoMutex _l(gProxyLock);

		IBinder* b = (IBinder*)
		env->GetLongField(obj, gBinderProxyOffsets.mObject);