| // |
| // Copyright (C) 2017 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_HARDWARE_CONFIGSTORE_UTILS_H |
| #define ANDROID_HARDWARE_CONFIGSTORE_UTILS_H |
| |
| #include <android/hardware/configstore/1.0/types.h> |
| #include <hidl/Status.h> |
| |
| #include <sstream> |
| |
| namespace android { |
| namespace hardware { |
| |
| namespace details { |
| // Templated classes can use the below method |
| // to avoid creating dependencies on liblog. |
| bool wouldLogInfo(); |
| void logAlwaysInfo(const std::string& message); |
| void logAlwaysError(const std::string& message); |
| } // namespace details |
| |
| namespace configstore { |
| // import types from V1_0 |
| using ::android::hardware::configstore::V1_0::OptionalBool; |
| using ::android::hardware::configstore::V1_0::OptionalInt32; |
| using ::android::hardware::configstore::V1_0::OptionalUInt32; |
| using ::android::hardware::configstore::V1_0::OptionalInt64; |
| using ::android::hardware::configstore::V1_0::OptionalUInt64; |
| using ::android::hardware::configstore::V1_0::OptionalString; |
| |
| // arguments V: type for the value (i.e., OptionalXXX) |
| // I: interface class name |
| // func: member function pointer |
| template<typename V, typename I, android::hardware::Return<void> (I::* func) |
| (std::function<void(const V&)>)> |
| decltype(V::value) get(const decltype(V::value) &defValue) { |
| using namespace android::hardware::details; |
| auto getHelper = []()->V { |
| V ret; |
| sp<I> configs = I::getService(); |
| |
| if (!configs.get()) { |
| // fallback to the default value |
| ret.specified = false; |
| } else { |
| auto status = (*configs.*func)([&ret](V v) { ret = v; }); |
| if (!status.isOk()) { |
| std::ostringstream oss; |
| oss << "HIDL call failed for retrieving a config item from " |
| "configstore : " |
| << status.description().c_str(); |
| logAlwaysError(oss.str()); |
| ret.specified = false; |
| } |
| } |
| |
| return ret; |
| }; |
| static V cachedValue = getHelper(); |
| |
| if (wouldLogInfo()) { |
| std::string iname = __PRETTY_FUNCTION__; |
| // func name starts with "func = " in __PRETTY_FUNCTION__ |
| auto pos = iname.find("func = "); |
| if (pos != std::string::npos) { |
| iname = iname.substr(pos + sizeof("func = ")); |
| iname.pop_back(); // remove trailing ']' |
| } else { |
| iname += " (unknown)"; |
| } |
| |
| std::ostringstream oss; |
| oss << iname << " retrieved: " |
| << (cachedValue.specified ? cachedValue.value : defValue) |
| << (cachedValue.specified ? "" : " (default)"); |
| logAlwaysInfo(oss.str()); |
| } |
| |
| return cachedValue.specified ? cachedValue.value : defValue; |
| } |
| |
| template<typename I, android::hardware::Return<void> (I::* func) |
| (std::function<void(const OptionalBool&)>)> |
| bool getBool(const bool defValue) { |
| return get<OptionalBool, I, func>(defValue); |
| } |
| |
| template<typename I, android::hardware::Return<void> (I::* func) |
| (std::function<void(const OptionalInt32&)>)> |
| int32_t getInt32(const int32_t defValue) { |
| return get<OptionalInt32, I, func>(defValue); |
| } |
| |
| template<typename I, android::hardware::Return<void> (I::* func) |
| (std::function<void(const OptionalUInt32&)>)> |
| uint32_t getUInt32(const uint32_t defValue) { |
| return get<OptionalUInt32, I, func>(defValue); |
| } |
| |
| template<typename I, android::hardware::Return<void> (I::* func) |
| (std::function<void(const OptionalInt64&)>)> |
| int64_t getInt64(const int64_t defValue) { |
| return get<OptionalInt64, I, func>(defValue); |
| } |
| |
| template<typename I, android::hardware::Return<void> (I::* func) |
| (std::function<void(const OptionalUInt64&)>)> |
| uint64_t getUInt64(const uint64_t defValue) { |
| return get<OptionalUInt64, I, func>(defValue); |
| } |
| |
| template<typename I, android::hardware::Return<void> (I::* func) |
| (std::function<void(const OptionalString&)>)> |
| std::string getString(const std::string &defValue) { |
| return get<OptionalString, I, func>(defValue); |
| } |
| |
| } // namespace configstore |
| } // namespace hardware |
| } // namespace android |
| |
| #endif // ANDROID_HARDWARE_CONFIGSTORE_UTILS_H |