src/bin/lttng-sessiond/clock-class.hpp

   1 /*
   2  * Copyright (C) 2022 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-only
   5  *
   6  */
   7
   8 #ifndef LTTNG_CLOCK_CLASS_H
   9 #define LTTNG_CLOCK_CLASS_H
  10
  11 #include <common/compat/time.hpp>
  12 #include <common/uuid.hpp>
  13 #include <vendor/optional.hpp>
  14
  15 #include <stddef.h>
  16 #include <stdint.h>
  17 #include <stdio.h>
  18 #include <string>
  19 #include <sys/time.h>
  20 #include <urcu/arch.h>
  21 #include <urcu/system.h>
  22
  23 namespace lttng {
  24 namespace sessiond {
  25 namespace trace {
  26
  27 class trace_class_visitor;
  28
  29 class clock_class {
  30 public:
  31         using cycles_t = uint64_t;
  32         using scycles_t = int64_t;
  33         using cuptr = std::unique_ptr<const clock_class>;
  34
  35         virtual ~clock_class() = default;
  36         clock_class(const clock_class&) = delete;
  37         clock_class(clock_class&&) = delete;
  38         clock_class& operator=(clock_class&&) = delete;
  39         clock_class& operator=(const clock_class&) = delete;
  40
  41         virtual void accept(trace_class_visitor& visitor) const;
  42
  43         const std::string name;
  44         const std::string description;
  45         const nonstd::optional<lttng_uuid> uuid;
  46         const scycles_t offset;
  47         const cycles_t frequency;
  48
  49 protected:
  50         clock_class(std::string name,
  51                     std::string description,
  52                     nonstd::optional<lttng_uuid> uuid,
  53                     scycles_t offset,
  54                     cycles_t frequency);
  55 };
  56
  57 } /* namespace trace */
  58 } /* namespace sessiond */
  59 } /* namespace lttng */
  60
  61 #endif /* LTTNG_CLOCK_CLASS_H */