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https://github.com/XRPLF/rippled.git
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34ef577604
This change replaces all include guards in the `src/` and `include/` directories by `#pragma once`.
48 lines
1.0 KiB
C++
48 lines
1.0 KiB
C++
#pragma once
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#include <atomic>
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#include <chrono>
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#include <ratio>
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#include <thread>
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namespace xrpl {
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/** Tracks program uptime to seconds precision.
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The timer caches the current time as a performance optimization.
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This allows clients to query the current time thousands of times
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per second.
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*/
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class UptimeClock
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{
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public:
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using rep = int;
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using period = std::ratio<1>;
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using duration = std::chrono::duration<rep, period>;
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using time_point = std::chrono::time_point<UptimeClock>;
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static constexpr bool is_steady = std::chrono::system_clock::is_steady;
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explicit UptimeClock() = default;
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static time_point
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now(); // seconds since rippled program start
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private:
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static std::atomic<rep> now_;
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static std::atomic<bool> stop_;
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struct update_thread : private std::thread
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{
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~update_thread();
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update_thread(update_thread&&) = default;
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using std::thread::thread;
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};
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static update_thread
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start_clock();
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};
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} // namespace xrpl
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