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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
namespace vbench {
template <typename T>
TimeQueue<T>::TimeQueue(double window, double tick)
: _lock(),
_cond(),
_time(0.0),
_window(window),
_tick(tick),
_queue(),
_closed(false)
{
}
template<typename T>
TimeQueue<T>::~TimeQueue() = default;
template <typename T>
void
TimeQueue<T>::close()
{
std::lock_guard guard(_lock);
_closed = true;
_cond.notify_all();
}
template <typename T>
void
TimeQueue<T>::discard()
{
std::lock_guard guard(_lock);
while (!_queue.empty()) {
_queue.pop_any();
}
_cond.notify_all();
}
template <typename T>
void
TimeQueue<T>::insert(std::unique_ptr<T> obj, double time)
{
std::unique_lock guard(_lock);
while (time > (_time + _window) && !_closed) {
_cond.wait(guard);
}
if (!_closed) {
_queue.push(Entry(std::move(obj), time));
}
}
template <typename T>
bool
TimeQueue<T>::extract(double time, std::vector<std::unique_ptr<T> > &list, double &delay)
{
std::lock_guard guard(_lock);
_time = time;
while (!_queue.empty() && _queue.front().time <= time) {
list.push_back(std::move(_queue.front().object));
_queue.pop_front();
}
_cond.notify_all();
delay = _queue.empty() ? _tick : (_queue.front().time - time);
return (!_closed || !_queue.empty() || !list.empty());
}
} // namespace vbench
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