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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
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