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#pragma once
#include <chrono>
#include <condition_variable>
#include <mutex>
class Waiter {
public:
template<class R, class P>
bool wait_for(std::chrono::duration<R, P> const &time) const {
std::unique_lock<std::mutex> lock(m);
return !cv.wait_for(lock, time, [&] { return terminate; });
}
void kill() {
std::unique_lock<std::mutex> lock(m);
terminate = true;
cv.notify_all();
}
void revive() {
std::unique_lock<std::mutex> lock(m);
terminate = false;
}
private:
mutable std::condition_variable cv;
mutable std::mutex m;
bool terminate = false;
};
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