Peng Xu | 0cc8f80 | 2016-04-05 23:46:03 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef ANDROID_SENSOR_LIST_H |
| 18 | #define ANDROID_SENSOR_LIST_H |
| 19 | |
| 20 | #include "SensorInterface.h" |
| 21 | |
| 22 | #include <gui/Sensor.h> |
| 23 | #include <utils/String8.h> |
| 24 | #include <utils/Vector.h> |
| 25 | |
| 26 | #include <mutex> |
| 27 | #include <map> |
| 28 | #include <string> |
| 29 | #include <unordered_set> |
| 30 | #include <vector> |
| 31 | |
| 32 | namespace android { |
| 33 | class SensorInterface; |
| 34 | |
| 35 | namespace SensorServiceUtil { |
| 36 | |
| 37 | class Dumpable { |
| 38 | public: |
| 39 | virtual std::string dump() const; |
| 40 | virtual void setFormat(std::string ) {} |
| 41 | virtual ~Dumpable() {} |
| 42 | }; |
| 43 | |
| 44 | class SensorList : public Dumpable { |
| 45 | public: |
| 46 | // After SensorInterface * is added into SensorList, it can be assumed that SensorList own the |
| 47 | // object it pointed to and the object should not be released elsewhere. |
| 48 | bool add(int handle, SensorInterface* si, bool isForDebug = false, bool isVirtual = false); |
Peng Xu | 755c451 | 2016-04-07 23:15:14 -0700 | [diff] [blame^] | 49 | |
| 50 | // After a handle is removed, the object that SensorInterface * pointing to may get deleted if |
| 51 | // no more sp<> of the same object exist. |
Peng Xu | 0cc8f80 | 2016-04-05 23:46:03 -0700 | [diff] [blame] | 52 | bool remove(int handle); |
| 53 | |
| 54 | inline bool hasAnySensor() const { return mHandleMap.size() > 0;} |
| 55 | |
| 56 | //helper functions |
| 57 | const Vector<Sensor> getUserSensors() const; |
| 58 | const Vector<Sensor> getUserDebugSensors() const; |
| 59 | const Vector<Sensor> getDynamicSensors() const; |
| 60 | const Vector<Sensor> getVirtualSensors() const; |
| 61 | |
| 62 | String8 getName(int handle) const; |
Peng Xu | 755c451 | 2016-04-07 23:15:14 -0700 | [diff] [blame^] | 63 | sp<SensorInterface> getInterface(int handle) const; |
Peng Xu | 0cc8f80 | 2016-04-05 23:46:03 -0700 | [diff] [blame] | 64 | bool isNewHandle(int handle) const; |
| 65 | |
| 66 | // Iterate through Sensor in sensor list and perform operation f on each Sensor object. |
| 67 | // |
| 68 | // TF is a function with the signature: |
| 69 | // bool f(const Sensor &); |
| 70 | // A return value of 'false' stops the iteration immediately. |
| 71 | // |
| 72 | // Note: in the function f, it is illegal to make calls to member functions of the same |
| 73 | // SensorList object on which forEachSensor is invoked. |
| 74 | template <typename TF> |
| 75 | void forEachSensor(const TF& f) const; |
| 76 | |
| 77 | const Sensor& getNonSensor() const { return mNonSensor;} |
| 78 | |
| 79 | // Dumpable interface |
| 80 | virtual std::string dump() const override; |
| 81 | |
| 82 | virtual ~SensorList(); |
| 83 | private: |
| 84 | struct Entry { |
Peng Xu | 755c451 | 2016-04-07 23:15:14 -0700 | [diff] [blame^] | 85 | sp<SensorInterface> si; |
Peng Xu | 0cc8f80 | 2016-04-05 23:46:03 -0700 | [diff] [blame] | 86 | const bool isForDebug; |
| 87 | const bool isVirtual; |
| 88 | Entry(SensorInterface* si_, bool debug_, bool virtual_) : |
| 89 | si(si_), isForDebug(debug_), isVirtual(virtual_) { |
| 90 | } |
| 91 | }; |
| 92 | |
| 93 | const static Sensor mNonSensor; //.getName() == "unknown", |
| 94 | |
| 95 | // Iterate through Entry in sensor list and perform operation f on each Entry. |
| 96 | // |
| 97 | // TF is a function with the signature: |
| 98 | // bool f(const Entry &); |
| 99 | // A return value of 'false' stops the iteration over entries immediately. |
| 100 | // |
| 101 | // Note: in the function being passed in, it is illegal to make calls to member functions of the |
| 102 | // same SensorList object on which forEachSensor is invoked. |
| 103 | template <typename TF> |
| 104 | void forEachEntry(const TF& f) const; |
| 105 | |
| 106 | template <typename T, typename TF> |
| 107 | T getOne(int handle, const TF& accessor, T def = T()) const; |
| 108 | |
| 109 | mutable std::mutex mLock; |
| 110 | std::map<int, Entry> mHandleMap; |
| 111 | std::unordered_set<int> mUsedHandle; |
Peng Xu | 0cc8f80 | 2016-04-05 23:46:03 -0700 | [diff] [blame] | 112 | }; |
| 113 | |
| 114 | template <typename TF> |
| 115 | void SensorList::forEachSensor(const TF& f) const { |
| 116 | // lock happens in forEachEntry |
| 117 | forEachEntry([&f] (const Entry& e) -> bool { return f(e.si->getSensor());}); |
| 118 | } |
| 119 | |
| 120 | template <typename TF> |
| 121 | void SensorList::forEachEntry(const TF& f) const { |
| 122 | std::lock_guard<std::mutex> lk(mLock); |
| 123 | |
| 124 | for (auto&& i : mHandleMap) { |
| 125 | if (!f(i.second)){ |
| 126 | break; |
| 127 | } |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | template <typename T, typename TF> |
| 132 | T SensorList::getOne(int handle, const TF& accessor, T def) const { |
| 133 | std::lock_guard<std::mutex> lk(mLock); |
| 134 | auto i = mHandleMap.find(handle); |
| 135 | if (i != mHandleMap.end()) { |
| 136 | return accessor(i->second); |
| 137 | } else { |
| 138 | return def; |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | } // namespace SensorServiceUtil |
| 143 | } // namespace android |
| 144 | |
| 145 | #endif // ANDROID_SENSOR_LIST_H |