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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2021 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#if defined(HAVE_CONFIG_H)
#include <config/bitcoin-config.h>
#endif
#include <compat.h>
#include <tinyformat.h>
#include <util/time.h>
#include <util/check.h>
#include <boost/date_time/posix_time/posix_time.hpp>
#include <atomic>
#include <chrono>
#include <ctime>
#include <locale>
#include <thread>
#include <sstream>
#include <string>
void UninterruptibleSleep(const std::chrono::microseconds& n) { std::this_thread::sleep_for(n); }
static std::atomic<int64_t> nMockTime(0); //!< For testing
bool ChronoSanityCheck()
{
// std::chrono::system_clock.time_since_epoch and time_t(0) are not guaranteed
// to use the Unix epoch timestamp, prior to C++20, but in practice they almost
// certainly will. Any differing behavior will be assumed to be an error, unless
// certain platforms prove to consistently deviate, at which point we'll cope
// with it by adding offsets.
// Create a new clock from time_t(0) and make sure that it represents 0
// seconds from the system_clock's time_since_epoch. Then convert that back
// to a time_t and verify that it's the same as before.
const time_t time_t_epoch{};
auto clock = std::chrono::system_clock::from_time_t(time_t_epoch);
if (std::chrono::duration_cast<std::chrono::seconds>(clock.time_since_epoch()).count() != 0) {
return false;
}
time_t time_val = std::chrono::system_clock::to_time_t(clock);
if (time_val != time_t_epoch) {
return false;
}
// Check that the above zero time is actually equal to the known unix timestamp.
struct tm epoch;
#ifdef HAVE_GMTIME_R
if (gmtime_r(&time_val, &epoch) == nullptr) {
#else
if (gmtime_s(&epoch, &time_val) != 0) {
#endif
return false;
}
if ((epoch.tm_sec != 0) ||
(epoch.tm_min != 0) ||
(epoch.tm_hour != 0) ||
(epoch.tm_mday != 1) ||
(epoch.tm_mon != 0) ||
(epoch.tm_year != 70)) {
return false;
}
return true;
}
NodeClock::time_point NodeClock::now() noexcept
{
const std::chrono::seconds mocktime{nMockTime.load(std::memory_order_relaxed)};
const auto ret{
mocktime.count() ?
mocktime :
std::chrono::system_clock::now().time_since_epoch()};
assert(ret > 0s);
return time_point{ret};
};
template <typename T>
static T GetSystemTime()
{
const auto now = std::chrono::duration_cast<T>(std::chrono::system_clock::now().time_since_epoch());
assert(now.count() > 0);
return now;
}
void SetMockTime(int64_t nMockTimeIn)
{
Assert(nMockTimeIn >= 0);
nMockTime.store(nMockTimeIn, std::memory_order_relaxed);
}
void SetMockTime(std::chrono::seconds mock_time_in)
{
nMockTime.store(mock_time_in.count(), std::memory_order_relaxed);
}
std::chrono::seconds GetMockTime()
{
return std::chrono::seconds(nMockTime.load(std::memory_order_relaxed));
}
int64_t GetTimeMillis()
{
return int64_t{GetSystemTime<std::chrono::milliseconds>().count()};
}
int64_t GetTimeMicros()
{
return int64_t{GetSystemTime<std::chrono::microseconds>().count()};
}
int64_t GetTime() { return GetTime<std::chrono::seconds>().count(); }
std::string FormatISO8601DateTime(int64_t nTime) {
struct tm ts;
time_t time_val = nTime;
#ifdef HAVE_GMTIME_R
if (gmtime_r(&time_val, &ts) == nullptr) {
#else
if (gmtime_s(&ts, &time_val) != 0) {
#endif
return {};
}
return strprintf("%04i-%02i-%02iT%02i:%02i:%02iZ", ts.tm_year + 1900, ts.tm_mon + 1, ts.tm_mday, ts.tm_hour, ts.tm_min, ts.tm_sec);
}
std::string FormatISO8601Date(int64_t nTime) {
struct tm ts;
time_t time_val = nTime;
#ifdef HAVE_GMTIME_R
if (gmtime_r(&time_val, &ts) == nullptr) {
#else
if (gmtime_s(&ts, &time_val) != 0) {
#endif
return {};
}
return strprintf("%04i-%02i-%02i", ts.tm_year + 1900, ts.tm_mon + 1, ts.tm_mday);
}
int64_t ParseISO8601DateTime(const std::string& str)
{
static const boost::posix_time::ptime epoch = boost::posix_time::from_time_t(0);
static const std::locale loc(std::locale::classic(),
new boost::posix_time::time_input_facet("%Y-%m-%dT%H:%M:%SZ"));
std::istringstream iss(str);
iss.imbue(loc);
boost::posix_time::ptime ptime(boost::date_time::not_a_date_time);
iss >> ptime;
if (ptime.is_not_a_date_time() || epoch > ptime)
return 0;
return (ptime - epoch).total_seconds();
}
struct timeval MillisToTimeval(int64_t nTimeout)
{
struct timeval timeout;
timeout.tv_sec = nTimeout / 1000;
timeout.tv_usec = (nTimeout % 1000) * 1000;
return timeout;
}
struct timeval MillisToTimeval(std::chrono::milliseconds ms)
{
return MillisToTimeval(count_milliseconds(ms));
}
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