1 /*
2 * Copyright (C) 2022 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 #include <battery_mitigation/BatteryMitigation.h>
18
19 #include <sstream>
20
21 #define MAX_BROWNOUT_DATA_AGE_MINUTES 5
22 #define ONE_SECOND_IN_US 1000000
23
24 namespace android {
25 namespace hardware {
26 namespace google {
27 namespace pixel {
28
BatteryMitigation(const struct MitigationConfig::Config & cfg)29 BatteryMitigation::BatteryMitigation(const struct MitigationConfig::Config &cfg) {
30 mThermalMgr = &MitigationThermalManager::getInstance();
31 mThermalMgr->updateConfig(cfg);
32 }
33
isMitigationLogTimeValid(std::chrono::system_clock::time_point startTime,const char * const logFilePath,const char * const timestampFormat,const std::regex pattern)34 bool BatteryMitigation::isMitigationLogTimeValid(std::chrono::system_clock::time_point startTime,
35 const char *const logFilePath,
36 const char *const timestampFormat,
37 const std::regex pattern) {
38 std::string logFile;
39 if (!android::base::ReadFileToString(logFilePath, &logFile)) {
40 return false;
41 }
42 std::istringstream content(logFile);
43 std::string line;
44 int counter = 0;
45 std::smatch pattern_match;
46 while (std::getline(content, line)) {
47 if (std::regex_match(line, pattern_match, pattern)) {
48 std::tm triggeredTimestamp = {};
49 std::istringstream ss(pattern_match.str());
50 ss >> std::get_time(&triggeredTimestamp, timestampFormat);
51 auto logFileTime = std::chrono::system_clock::from_time_t(mktime(&triggeredTimestamp));
52 auto epoch_logFileTime = logFileTime.time_since_epoch().count() / ONE_SECOND_IN_US;
53
54 // Convert start time to same format
55 auto time_sec = std::chrono::system_clock::to_time_t(startTime);
56 struct tm start_tm;
57 std::stringstream oss;
58 localtime_r(&time_sec, &start_tm);
59 oss << std::put_time(&start_tm, timestampFormat) << std::flush;
60 std::tm startTimestamp = {};
61 std::istringstream st(oss.str());
62 st >> std::get_time(&startTimestamp, timestampFormat);
63 auto start = std::chrono::system_clock::from_time_t(mktime(&startTimestamp));
64 auto epoch_startTime = start.time_since_epoch().count() / ONE_SECOND_IN_US;
65
66 auto delta = epoch_startTime - epoch_logFileTime;
67 auto delta_minutes = delta / 60;
68
69 if ((delta_minutes < MAX_BROWNOUT_DATA_AGE_MINUTES) && (delta_minutes >= 0)) {
70 return true;
71 }
72 }
73 counter += 1;
74 if (counter > 5) {
75 break;
76 }
77 }
78 return false;
79 }
80
81 } // namespace pixel
82 } // namespace google
83 } // namespace hardware
84 } // namespace android
85