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sleeper_thread: Allow sleep_for with max duration 

The standard library has the implicit requirement that for
std::condition_variable::sleep_for() the duration must not cause an
overflow if added to the current time.
This commit will reduce the duration accordingly to fit into the
duration type.
This commit is contained in:
Tamino Bauknecht 2023-10-23 00:54:01 +02:00
parent a459d8a9b3
commit ad7d4eb07d
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GPG Key ID: 77837396BE935C6C
1 changed files with 6 additions and 0 deletions
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6
include/util/sleeper_thread.hpp
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@ -67,6 +67,12 @@ class SleeperThread {
auto sleep_for(std::chrono::system_clock::duration dur) { auto sleep_for(std::chrono::system_clock::duration dur) {
std::unique_lock lk(mutex_); std::unique_lock lk(mutex_);
CancellationGuard cancel_lock; CancellationGuard cancel_lock;
using timepoint = std::chrono::system_clock::time_point;
static_assert(std::numeric_limits<timepoint::rep>::max() >=
std::numeric_limits<decltype(dur)::rep>::max());
if (std::chrono::system_clock::now() >= timepoint::max() - dur) {
dur = timepoint::max() - std::chrono::system_clock::now() - std::chrono::seconds(1);
}
return condvar_.wait_for(lk, dur, [this] { return signal_ || !do_run_; }); return condvar_.wait_for(lk, dur, [this] { return signal_ || !do_run_; });
} }