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      1 /*
      2  * Copyright (C) 2017 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 #ifndef STATS_LOG_EVENT_WRAPPER_H
     17 #define STATS_LOG_EVENT_WRAPPER_H
     18 
     19 #include <binder/Parcel.h>
     20 #include <binder/Parcelable.h>
     21 #include <binder/Status.h>
     22 #include <utils/RefBase.h>
     23 #include <vector>
     24 
     25 namespace android {
     26 namespace os {
     27 
     28 /**
     29  * A wrapper for a union type to contain multiple types of values.
     30  *
     31  */
     32 struct StatsLogValue {
     33   // Keep in sync with FieldValue.h
     34   enum STATS_LOG_VALUE_TYPE {
     35     UNKNOWN = 0,
     36     INT = 1,
     37     LONG = 2,
     38     FLOAT = 3,
     39     DOUBLE = 4,
     40     STRING = 5,
     41     STORAGE = 6
     42   };
     43 
     44   StatsLogValue() : type(UNKNOWN) {}
     45 
     46   StatsLogValue(int32_t v) {
     47     int_value = v;
     48     type = INT;
     49   }
     50 
     51   StatsLogValue(int64_t v) {
     52     long_value = v;
     53     type = LONG;
     54   }
     55 
     56   StatsLogValue(float v) {
     57     float_value = v;
     58     type = FLOAT;
     59   }
     60 
     61   StatsLogValue(double v) {
     62     double_value = v;
     63     type = DOUBLE;
     64   }
     65 
     66   StatsLogValue(const std::string& v) {
     67     str_value = v;
     68     type = STRING;
     69   }
     70 
     71   void setType(STATS_LOG_VALUE_TYPE t) { type = t; }
     72 
     73   union {
     74     int32_t int_value;
     75     int64_t long_value;
     76     float float_value;
     77     double double_value;
     78   };
     79   std::string str_value;
     80   std::vector<uint8_t> storage_value;
     81 
     82   STATS_LOG_VALUE_TYPE type;
     83 };
     84 
     85 struct WorkChain {
     86   std::vector<int32_t> uids;
     87   std::vector<std::string> tags;
     88 };
     89 
     90 // Represents a parcelable object. Only used to send data from Android OS to statsd.
     91 class StatsLogEventWrapper : public android::Parcelable {
     92  public:
     93   StatsLogEventWrapper();
     94 
     95   StatsLogEventWrapper(StatsLogEventWrapper&& in) = default;
     96 
     97   android::status_t writeToParcel(android::Parcel* out) const;
     98 
     99   android::status_t readFromParcel(const android::Parcel* in);
    100 
    101   int getTagId() const { return mTagId; }
    102 
    103   int64_t getElapsedRealTimeNs() const { return mElapsedRealTimeNs; }
    104 
    105   int64_t getWallClockTimeNs() const { return mWallClockTimeNs; }
    106 
    107   const std::vector<StatsLogValue>& getElements() const { return mElements; }
    108 
    109   const std::vector<WorkChain>& getWorkChains() const { return mWorkChains; }
    110 
    111  private:
    112   int mTagId;
    113 
    114   int64_t mElapsedRealTimeNs;
    115 
    116   int64_t mWallClockTimeNs;
    117 
    118   std::vector<StatsLogValue> mElements;
    119 
    120   std::vector<WorkChain> mWorkChains;
    121 };
    122 } // Namespace os
    123 } // Namespace android
    124 
    125 
    126 #endif  // STATS_LOG_EVENT_WRAPPER_H
    127 
    128