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diff --git a/binder/IInterface.h b/binder/IInterface.h
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+/*
+ * Copyright (C) 2005 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.
+ */
+
+//
+#ifndef ANDROID_IINTERFACE_H
+#define ANDROID_IINTERFACE_H
+
+#include <binder/Binder.h>
+
+namespace android {
+
+// ----------------------------------------------------------------------
+
+class IInterface : public virtual RefBase
+{
+public:
+ IInterface();
+ sp<IBinder> asBinder();
+ sp<const IBinder> asBinder() const;
+
+protected:
+ virtual ~IInterface();
+ virtual IBinder* onAsBinder() = 0;
+};
+
+// ----------------------------------------------------------------------
+
+template<typename INTERFACE>
+inline sp<INTERFACE> interface_cast(const sp<IBinder>& obj)
+{
+ return INTERFACE::asInterface(obj);
+}
+
+// ----------------------------------------------------------------------
+
+template<typename INTERFACE>
+class BnInterface : public INTERFACE, public BBinder
+{
+public:
+ virtual sp<IInterface> queryLocalInterface(const String16& _descriptor);
+ virtual const String16& getInterfaceDescriptor() const;
+
+protected:
+ virtual IBinder* onAsBinder();
+};
+
+// ----------------------------------------------------------------------
+
+template<typename INTERFACE>
+class BpInterface : public INTERFACE, public BpRefBase
+{
+public:
+ BpInterface(const sp<IBinder>& remote);
+
+protected:
+ virtual IBinder* onAsBinder();
+};
+
+// ----------------------------------------------------------------------
+
+#define DECLARE_META_INTERFACE(INTERFACE) \
+ static const android::String16 descriptor; \
+ static android::sp<I##INTERFACE> asInterface( \
+ const android::sp<android::IBinder>& obj); \
+ virtual const android::String16& getInterfaceDescriptor() const; \
+ I##INTERFACE(); \
+ virtual ~I##INTERFACE(); \
+
+
+#define IMPLEMENT_META_INTERFACE(INTERFACE, NAME) \
+ const android::String16 I##INTERFACE::descriptor(NAME); \
+ const android::String16& \
+ I##INTERFACE::getInterfaceDescriptor() const { \
+ return I##INTERFACE::descriptor; \
+ } \
+ android::sp<I##INTERFACE> I##INTERFACE::asInterface( \
+ const android::sp<android::IBinder>& obj) \
+ { \
+ android::sp<I##INTERFACE> intr; \
+ if (obj != NULL) { \
+ intr = static_cast<I##INTERFACE*>( \
+ obj->queryLocalInterface( \
+ I##INTERFACE::descriptor).get()); \
+ if (intr == NULL) { \
+ intr = new Bp##INTERFACE(obj); \
+ } \
+ } \
+ return intr; \
+ } \
+ I##INTERFACE::I##INTERFACE() { } \
+ I##INTERFACE::~I##INTERFACE() { } \
+
+
+#define CHECK_INTERFACE(interface, data, reply) \
+ if (!data.checkInterface(this)) { return PERMISSION_DENIED; } \
+
+
+// ----------------------------------------------------------------------
+// No user-serviceable parts after this...
+
+template<typename INTERFACE>
+inline sp<IInterface> BnInterface<INTERFACE>::queryLocalInterface(
+ const String16& _descriptor)
+{
+ if (_descriptor == INTERFACE::descriptor) return this;
+ return NULL;
+}
+
+template<typename INTERFACE>
+inline const String16& BnInterface<INTERFACE>::getInterfaceDescriptor() const
+{
+ return INTERFACE::getInterfaceDescriptor();
+}
+
+template<typename INTERFACE>
+IBinder* BnInterface<INTERFACE>::onAsBinder()
+{
+ return this;
+}
+
+template<typename INTERFACE>
+inline BpInterface<INTERFACE>::BpInterface(const sp<IBinder>& remote)
+ : BpRefBase(remote)
+{
+}
+
+template<typename INTERFACE>
+inline IBinder* BpInterface<INTERFACE>::onAsBinder()
+{
+ return remote();
+}
+
+// ----------------------------------------------------------------------
+
+}; // namespace android
+
+#endif // ANDROID_IINTERFACE_H