Seastar
High performance C++ framework for concurrent servers
manual_clock.hh
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18 /*
19  * Copyright (C) 2016 ScyllaDB
20  */
21 
22 #pragma once
23 
24 #ifndef SEASTAR_MODULE
25 #include <seastar/core/timer.hh>
26 #include <seastar/util/modules.hh>
27 
28 #include <atomic>
29 #include <chrono>
30 #endif
31 
32 namespace seastar {
33 
34 SEASTAR_MODULE_EXPORT
35 class manual_clock {
36 public:
37  using rep = int64_t;
38  using period = std::chrono::nanoseconds::period;
39  using duration = std::chrono::duration<rep, period>;
40  using time_point = std::chrono::time_point<manual_clock, duration>;
41 private:
42  static std::atomic<rep> _now;
43  static void expire_timers() noexcept;
44 public:
45  manual_clock() noexcept;
46  static time_point now() noexcept {
47  return time_point(duration(_now.load(std::memory_order_relaxed)));
48  }
49  static void advance(duration d) noexcept;
50 };
51 
52 extern template class timer<manual_clock>;
53 
54 }
55 
Definition: manual_clock.hh:35
Definition: timer.hh:84
Seastar API namespace.
Definition: abort_on_ebadf.hh:26