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Global: update server_time_difference and system time together

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GitOrigin-RevId: 496f41aeee4783f537348028e3b8ff1052c7d6e2
This commit is contained in:
Arseny Smirnov 2019-12-25 14:44:44 +04:00
parent 00387a61ad
commit 22514eeeec
2 changed files with 46 additions and 26 deletions
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71
td/telegram/Global.cpp
View File

@ -61,6 +61,28 @@ void Global::set_mtproto_header(unique_ptr<MtprotoHeader> mtproto_header) {
mtproto_header_ = std::move(mtproto_header);
}
struct Diff {
double diff;
double system_time;
template <class StorerT>
void store(StorerT &storer) const {
using td::store;
store(diff, storer);
store(system_time, storer);
}
template <class ParserT>
void parse(ParserT &parser) {
using td::parse;
parse(diff, parser);
if (parser.get_left_len() != 0) {
parse(system_time, parser);
} else {
system_time = 0;
}
}
};
Status Global::init(const TdParameters &parameters, ActorId<Td> td, unique_ptr<TdDb> td_db_ptr) {
parameters_ = parameters;
@ -70,29 +92,21 @@ Status Global::init(const TdParameters &parameters, ActorId<Td> td, unique_ptr<T
td_ = td;
td_db_ = std::move(td_db_ptr);
string save_diff_str = td_db()->get_binlog_pmc()->get("server_time_difference");
string save_system_time_str = td_db()->get_binlog_pmc()->get("system_time");
string saved_diff_str = td_db()->get_binlog_pmc()->get("server_time_difference");
auto system_time = Clocks::system();
auto default_time_difference = system_time - Time::now();
if (save_diff_str.empty()) {
if (saved_diff_str.empty()) {
server_time_difference_ = default_time_difference;
server_time_difference_was_updated_ = false;
} else {
double save_diff;
unserialize(save_diff, save_diff_str).ensure();
Diff saved_diff;
unserialize(saved_diff, saved_diff_str).ensure();
double save_system_time;
if (save_system_time_str.empty()) {
save_system_time = 0;
} else {
unserialize(save_system_time, save_system_time_str).ensure();
}
double diff = save_diff + default_time_difference;
if (save_system_time > system_time) {
double time_backwards_fix = save_system_time - system_time;
double diff = saved_diff.diff + default_time_difference;
if (saved_diff.system_time > system_time) {
double time_backwards_fix = saved_diff.system_time - system_time;
LOG(WARNING) << "Fix system time which went backwards: " << format::as_time(time_backwards_fix) << " "
<< tag("saved_system_time", save_system_time) << tag("system_time", system_time);
<< tag("saved_system_time", saved_diff.system_time) << tag("system_time", system_time);
diff += time_backwards_fix;
}
LOG(DEBUG) << "LOAD: " << tag("server_time_difference", diff);
@ -109,13 +123,7 @@ void Global::update_server_time_difference(double diff) {
if (!server_time_difference_was_updated_ || server_time_difference_ < diff) {
server_time_difference_ = diff;
server_time_difference_was_updated_ = true;
// diff = server_time - Time::now
// save_diff = server_time - Clocks::system
double save_diff = diff + Time::now() - Clocks::system();
td_db()->get_binlog_pmc()->set("server_time_difference", serialize(save_diff));
save_system_time();
do_save_server_time_difference();
}
}
@ -123,12 +131,23 @@ void Global::save_system_time() {
auto t = Time::now();
if (system_time_saved_at_.load(std::memory_order_relaxed) + 10 < t) {
system_time_saved_at_ = t;
double save_system_time = Clocks::system();
LOG(INFO) << "Save system time";
td_db()->get_binlog_pmc()->set("system_time", serialize(save_system_time));
do_save_server_time_difference();
}
}
void Global::do_save_server_time_difference() {
LOG(INFO) << "Save server time difference";
// diff = server_time - Time::now
// fixed_diff = server_time - Clocks::system
double system_time = Clocks::system();
double fixed_diff = server_time_difference_ + Time::now() - system_time;
Diff diff;
diff.diff = fixed_diff;
diff.system_time = system_time;
td_db()->get_binlog_pmc()->set("server_time_difference", serialize(diff));
}
void Global::update_dns_time_difference(double diff) {
dns_time_difference_ = diff;
dns_time_difference_was_updated_ = true;

1
td/telegram/Global.h
View File

@ -145,6 +145,7 @@ class Global : public ActorContext {
void update_server_time_difference(double diff);
void save_system_time();
void do_save_server_time_difference();
double get_server_time_difference() const {
return server_time_difference_.load(std::memory_order_relaxed);