136 lines
4.5 KiB
C++
136 lines
4.5 KiB
C++
/*
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* Copyright (C) 2005 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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//
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#ifndef ANDROID_IINTERFACE_H
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#define ANDROID_IINTERFACE_H
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#include <utils/Binder.h>
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namespace android {
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// ----------------------------------------------------------------------
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class IInterface : public virtual RefBase
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{
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public:
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sp<IBinder> asBinder();
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sp<const IBinder> asBinder() const;
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protected:
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virtual IBinder* onAsBinder() = 0;
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};
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// ----------------------------------------------------------------------
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template<typename INTERFACE>
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inline sp<INTERFACE> interface_cast(const sp<IBinder>& obj)
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{
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return INTERFACE::asInterface(obj);
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}
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// ----------------------------------------------------------------------
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template<typename INTERFACE>
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class BnInterface : public INTERFACE, public BBinder
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{
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public:
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virtual sp<IInterface> queryLocalInterface(const String16& _descriptor);
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virtual String16 getInterfaceDescriptor() const;
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protected:
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virtual IBinder* onAsBinder();
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};
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// ----------------------------------------------------------------------
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template<typename INTERFACE>
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class BpInterface : public INTERFACE, public BpRefBase
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{
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public:
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BpInterface(const sp<IBinder>& remote);
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protected:
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virtual IBinder* onAsBinder();
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};
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// ----------------------------------------------------------------------
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#define DECLARE_META_INTERFACE(INTERFACE) \
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static const String16 descriptor; \
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static sp<I##INTERFACE> asInterface(const sp<IBinder>& obj); \
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virtual String16 getInterfaceDescriptor() const; \
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#define IMPLEMENT_META_INTERFACE(INTERFACE, NAME) \
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const String16 I##INTERFACE::descriptor(NAME); \
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String16 I##INTERFACE::getInterfaceDescriptor() const { \
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return I##INTERFACE::descriptor; \
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} \
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sp<I##INTERFACE> I##INTERFACE::asInterface(const sp<IBinder>& obj) \
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{ \
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sp<I##INTERFACE> intr; \
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if (obj != NULL) { \
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intr = static_cast<I##INTERFACE*>( \
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obj->queryLocalInterface( \
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I##INTERFACE::descriptor).get()); \
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if (intr == NULL) { \
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intr = new Bp##INTERFACE(obj); \
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} \
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} \
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return intr; \
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} \
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// ----------------------------------------------------------------------
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// No user-servicable parts after this...
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template<typename INTERFACE>
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inline sp<IInterface> BnInterface<INTERFACE>::queryLocalInterface(
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const String16& _descriptor)
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{
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if (_descriptor == INTERFACE::descriptor) return this;
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return NULL;
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}
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template<typename INTERFACE>
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inline String16 BnInterface<INTERFACE>::getInterfaceDescriptor() const
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{
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return INTERFACE::getInterfaceDescriptor();
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}
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template<typename INTERFACE>
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IBinder* BnInterface<INTERFACE>::onAsBinder()
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{
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return this;
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}
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template<typename INTERFACE>
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inline BpInterface<INTERFACE>::BpInterface(const sp<IBinder>& remote)
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: BpRefBase(remote)
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{
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}
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template<typename INTERFACE>
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inline IBinder* BpInterface<INTERFACE>::onAsBinder()
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{
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return remote();
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}
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// ----------------------------------------------------------------------
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}; // namespace android
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#endif // ANDROID_IINTERFACE_H
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