/* * Copyright (C) 2022 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. */ #define LOG_TAG "Process" #include #include #include #include #include namespace { void processLine(std::string_view s, std::map& m) { if (s.empty()) return; const size_t colon_pos = s.find(':'); if (colon_pos == std::string_view::npos) return; const size_t space_pos = s.find(' '); if (space_pos == 0 || space_pos == std::string_view::npos || space_pos > colon_pos) return; std::string key(s.data(), s.data() + space_pos); const size_t value_pos = s.find_first_not_of(' ', colon_pos + 1); if (value_pos == std::string_view::npos) return; const double value = strtod(s.data() + value_pos, nullptr /* end */); m[std::move(key)] = value; } } // namespace namespace android::mediautils { std::string getThreadSchedAsString(pid_t tid) { const pid_t pid = getpid(); const std::string path = std::string("/proc/").append(std::to_string(pid)) .append("/task/").append(std::to_string(tid)).append("/sched"); std::string sched; (void)android::base::ReadFileToString(path.c_str(), &sched); return sched; } std::map parseThreadSchedString(const std::string& schedString) { std::map m; if (schedString.empty()) return m; std::vector stringlist = android::base::Split(schedString, "\n"); // OK we use values not strings... m["summary"] = stringlist[0]; for (size_t i = 2; i < stringlist.size(); ++i) { processLine(stringlist[i], m); } return m; } } // namespace android::mediautils