87 lines
2.8 KiB
C++
87 lines
2.8 KiB
C++
/*
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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_HARDWARE_CONVERSION_HELPER_HIDL_H
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#define ANDROID_HARDWARE_CONVERSION_HELPER_HIDL_H
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#include <functional>
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#include <hidl/HidlSupport.h>
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#include <system/audio.h>
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namespace android {
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template<typename HalResult>
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class ConversionHelperHidl {
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protected:
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using HalResultConverter = std::function<status_t(const HalResult&)>;
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const std::string mClassName;
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ConversionHelperHidl(std::string_view className, HalResultConverter resultConv)
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: mClassName(className), mResultConverter(resultConv) {}
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template<typename R, typename T>
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status_t processReturn(const char* funcName,
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const ::android::hardware::Return<R>& ret, T *retval) {
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if (ret.isOk()) {
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// This way it also works for enum class to unscoped enum conversion.
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*retval = static_cast<T>(static_cast<R>(ret));
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return OK;
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}
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return processReturn(funcName, ret);
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}
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template<typename T>
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status_t processReturn(const char* funcName, const ::android::hardware::Return<T>& ret) {
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if (!ret.isOk()) {
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emitError(funcName, ret.description().c_str());
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}
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return ret.isOk() ? OK : FAILED_TRANSACTION;
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}
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status_t processReturn(const char* funcName,
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const ::android::hardware::Return<HalResult>& ret) {
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if (!ret.isOk()) {
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emitError(funcName, ret.description().c_str());
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}
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return ret.isOk() ? mResultConverter(ret) : FAILED_TRANSACTION;
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}
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template<typename T>
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status_t processReturn(
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const char* funcName, const ::android::hardware::Return<T>& ret, HalResult retval) {
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if (!ret.isOk()) {
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emitError(funcName, ret.description().c_str());
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}
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return ret.isOk() ? mResultConverter(retval) : FAILED_TRANSACTION;
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}
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const std::string& getClassName() const {
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return mClassName;
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}
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private:
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HalResultConverter mResultConverter;
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void emitError(const char* funcName, const char* description) {
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ALOGE("%s %p %s: %s (from rpc)", mClassName.c_str(), this, funcName, description);
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}
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};
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} // namespace android
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#endif // ANDROID_HARDWARE_CONVERSION_HELPER_HIDL_H
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