| /* |
| * 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(); |
| static sp<IBinder> asBinder(const IInterface*); |
| static sp<IBinder> asBinder(const sp<IInterface>&); |
| |
| 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: |
| typedef INTERFACE BaseInterface; |
| virtual IBinder* onAsBinder(); |
| }; |
| |
| // ---------------------------------------------------------------------- |
| |
| template<typename INTERFACE> |
| class BpInterface : public INTERFACE, public BpRefBase |
| { |
| public: |
| explicit BpInterface(const sp<IBinder>& remote); |
| |
| protected: |
| typedef INTERFACE BaseInterface; |
| virtual IBinder* onAsBinder(); |
| }; |
| |
| // ---------------------------------------------------------------------- |
| |
| #define DECLARE_META_INTERFACE(INTERFACE) \ |
| public: \ |
| 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(); \ |
| static bool setDefaultImpl(std::unique_ptr<I##INTERFACE> impl); \ |
| static const std::unique_ptr<I##INTERFACE>& getDefaultImpl(); \ |
| private: \ |
| static std::unique_ptr<I##INTERFACE> default_impl; \ |
| public: \ |
| |
| |
| #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 != nullptr) { \ |
| intr = static_cast<I##INTERFACE*>( \ |
| obj->queryLocalInterface( \ |
| I##INTERFACE::descriptor).get()); \ |
| if (intr == nullptr) { \ |
| intr = new Bp##INTERFACE(obj); \ |
| } \ |
| } \ |
| return intr; \ |
| } \ |
| std::unique_ptr<I##INTERFACE> I##INTERFACE::default_impl; \ |
| bool I##INTERFACE::setDefaultImpl(std::unique_ptr<I##INTERFACE> impl)\ |
| { \ |
| if (!I##INTERFACE::default_impl && impl) { \ |
| I##INTERFACE::default_impl = std::move(impl); \ |
| return true; \ |
| } \ |
| return false; \ |
| } \ |
| const std::unique_ptr<I##INTERFACE>& I##INTERFACE::getDefaultImpl() \ |
| { \ |
| return I##INTERFACE::default_impl; \ |
| } \ |
| I##INTERFACE::I##INTERFACE() { } \ |
| I##INTERFACE::~I##INTERFACE() { } \ |
| |
| |
| #define CHECK_INTERFACE(interface, data, reply) \ |
| do { \ |
| if (!(data).checkInterface(this)) { return PERMISSION_DENIED; } \ |
| } while (false) \ |
| |
| |
| // ---------------------------------------------------------------------- |
| // 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 nullptr; |
| } |
| |
| 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 |