| /* |
| * 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 <utils/Binder.h> |
| |
| namespace android { |
| |
| // ---------------------------------------------------------------------- |
| |
| class IInterface : public virtual RefBase |
| { |
| public: |
| sp<IBinder> asBinder(); |
| sp<const IBinder> asBinder() const; |
| |
| protected: |
| 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 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 String16 descriptor; \ |
| static sp<I##INTERFACE> asInterface(const sp<IBinder>& obj); \ |
| virtual String16 getInterfaceDescriptor() const; \ |
| |
| #define IMPLEMENT_META_INTERFACE(INTERFACE, NAME) \ |
| const String16 I##INTERFACE::descriptor(NAME); \ |
| String16 I##INTERFACE::getInterfaceDescriptor() const { \ |
| return I##INTERFACE::descriptor; \ |
| } \ |
| sp<I##INTERFACE> I##INTERFACE::asInterface(const sp<IBinder>& obj) \ |
| { \ |
| 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; \ |
| } \ |
| |
| // ---------------------------------------------------------------------- |
| // No user-servicable 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 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 |