mirror of
https://github.com/ton-blockchain/ton
synced 2025-02-13 03:32:22 +00:00
73 lines
2.4 KiB
C++
73 lines
2.4 KiB
C++
/*
|
|
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 <http://www.gnu.org/licenses/>.
|
|
|
|
Copyright 2017-2020 Telegram Systems LLP
|
|
*/
|
|
#include "td/utils/port/Clocks.h"
|
|
|
|
#include <chrono>
|
|
#include <ctime>
|
|
|
|
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<double>(std::chrono::duration_cast<std::chrono::nanoseconds>(duration).count()) * 1e-9;
|
|
}
|
|
|
|
double Clocks::system() {
|
|
auto duration = std::chrono::system_clock::now().time_since_epoch();
|
|
return static_cast<double>(std::chrono::duration_cast<std::chrono::nanoseconds>(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
|