/* This file is part of TON Blockchain Library. TON Blockchain Library is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version. TON Blockchain Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with TON Blockchain Library. If not, see . Copyright 2017-2020 Telegram Systems LLP */ #include "td/utils/port/Clocks.h" #include #include namespace td { double Clocks::monotonic() { // TODO write system specific functions, because std::chrono::steady_clock is steady only under Windows auto duration = std::chrono::steady_clock::now().time_since_epoch(); return static_cast(std::chrono::duration_cast(duration).count()) * 1e-9; } double Clocks::system() { auto duration = std::chrono::system_clock::now().time_since_epoch(); return static_cast(std::chrono::duration_cast(duration).count()) * 1e-9; } int Clocks::tz_offset() { // not thread-safe on POSIX, so calculate the offset only once static int offset = [] { auto now = std::time(nullptr); auto time_ptr = std::localtime(&now); if (time_ptr == nullptr) { return 0; } auto local_time = *time_ptr; time_ptr = std::gmtime(&now); if (time_ptr == nullptr) { return 0; } auto utc_time = *time_ptr; int minute_offset = local_time.tm_min - utc_time.tm_min; int hour_offset = local_time.tm_hour - utc_time.tm_hour; int day_offset = local_time.tm_mday - utc_time.tm_mday; if (day_offset >= 20) { day_offset = -1; } else if (day_offset <= -20) { day_offset = 1; } int sec_offset = day_offset * 86400 + hour_offset * 3600 + minute_offset * 60; if (sec_offset >= 15 * 3600 || sec_offset <= -15 * 3600) { return 0; } return sec_offset / 900 * 900; // round to 900 just in case }(); return offset; } static int init_tz_offset = Clocks::tz_offset(); } // namespace td