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54 lines
1.7 KiB
54 lines
1.7 KiB
/*
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* Copyright (C) 2016 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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#ifndef ANDROID_HIDL_PASSTHROUGH_SUPPORT_H
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#define ANDROID_HIDL_PASSTHROUGH_SUPPORT_H
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#include <android/hidl/base/1.0/IBase.h>
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namespace android {
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namespace hardware {
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namespace details {
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/*
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* Wrap the given interface with the lowest BsChild possible. Will return the
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* argument directly if nullptr or isRemote().
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*
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* Note that 'static_cast<IFoo*>(wrapPassthrough(foo).get()) is guaranteed to work'
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* assuming that foo is an instance of IFoo.
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*
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* TODO(b/33754152): calling this method multiple times should not re-wrap.
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*/
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sp<::android::hidl::base::V1_0::IBase> wrapPassthroughInternal(
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sp<::android::hidl::base::V1_0::IBase> iface);
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/**
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* Helper method which provides reasonable code to wrapPassthroughInternal
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* which can be used to call wrapPassthrough.
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*/
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template <typename IType,
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typename = std::enable_if_t<std::is_same<i_tag, typename IType::_hidl_tag>::value>>
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sp<IType> wrapPassthrough(sp<IType> iface) {
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return static_cast<IType*>(wrapPassthroughInternal(iface).get());
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}
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} // namespace details
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} // namespace hardware
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} // namespace android
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#endif // ANDROID_HIDL_PASSTHROUGH_SUPPORT_H
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