mirror of
https://github.com/ton-blockchain/ton
synced 2025-03-09 15:40:10 +00:00
124 lines
3 KiB
C++
124 lines
3 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 2017-2019 Telegram Systems LLP
|
|
*/
|
|
#pragma once
|
|
|
|
#include "td/utils/common.h"
|
|
#include "td/utils/port/Clocks.h"
|
|
|
|
namespace td {
|
|
|
|
class Time {
|
|
public:
|
|
static double now();
|
|
static double now_cached() {
|
|
// Temporary(?) use now in now_cached
|
|
// Problem:
|
|
// thread A: check that now() > timestamp and notifies thread B
|
|
// thread B: must see that now() > timestamp()
|
|
//
|
|
// now() and now_cached() must be monotonic
|
|
//
|
|
// if a=now[_cached]() happens before b=now[_cached] than
|
|
// a <= b
|
|
//
|
|
// As an alternative we may say that now_cached is a thread local copy of now
|
|
return now();
|
|
}
|
|
};
|
|
|
|
inline void relax_timeout_at(double *timeout, double new_timeout) {
|
|
if (new_timeout == 0) {
|
|
return;
|
|
}
|
|
if (*timeout == 0 || new_timeout < *timeout) {
|
|
*timeout = new_timeout;
|
|
}
|
|
}
|
|
|
|
class Timestamp {
|
|
public:
|
|
Timestamp() = default;
|
|
static Timestamp never() {
|
|
return Timestamp{};
|
|
}
|
|
static Timestamp now() {
|
|
return Timestamp{Time::now()};
|
|
}
|
|
static Timestamp now_cached() {
|
|
return Timestamp{Time::now_cached()};
|
|
}
|
|
static Timestamp at(double timeout) {
|
|
return Timestamp{timeout};
|
|
}
|
|
static Timestamp at_unix(double timeout) {
|
|
return Timestamp{timeout - td::Clocks::system() + Time::now()};
|
|
}
|
|
|
|
static Timestamp in(double timeout) {
|
|
return Timestamp{Time::now_cached() + timeout};
|
|
}
|
|
|
|
bool is_in_past() const {
|
|
return at_ <= Time::now_cached();
|
|
}
|
|
|
|
explicit operator bool() const {
|
|
return at_ > 0;
|
|
}
|
|
|
|
double at() const {
|
|
return at_;
|
|
}
|
|
double at_unix() const {
|
|
return at_ + Clocks::system() - Time::now();
|
|
}
|
|
|
|
double in() const {
|
|
return at_ - Time::now_cached();
|
|
}
|
|
|
|
void relax(const Timestamp &timeout) {
|
|
if (!timeout) {
|
|
return;
|
|
}
|
|
if (!*this || at_ > timeout.at_) {
|
|
at_ = timeout.at_;
|
|
}
|
|
}
|
|
|
|
friend bool operator==(Timestamp a, Timestamp b);
|
|
|
|
private:
|
|
double at_{0};
|
|
|
|
explicit Timestamp(double timeout) : at_(timeout) {
|
|
}
|
|
};
|
|
|
|
template <class StorerT>
|
|
void store(const Timestamp ×tamp, StorerT &storer) {
|
|
storer.store_binary(timestamp.at() - Time::now() + Clocks::system());
|
|
}
|
|
|
|
template <class ParserT>
|
|
void parse(Timestamp ×tamp, ParserT &parser) {
|
|
timestamp = Timestamp::in(parser.fetch_double() - Clocks::system());
|
|
}
|
|
|
|
} // namespace td
|