sessiond: add tracer-agnostic trace hierarchy classes

[lttng-tools.git] / src / bin / lttng-sessiond / clock-class.hpp

diff --git a/src/bin/lttng-sessiond/clock-class.hpp b/src/bin/lttng-sessiond/clock-class.hpp
new file mode 100644 (file)
index 0000000..3a4755d
--- /dev/null
+++ b/src/bin/lttng-sessiond/clock-class.hpp
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2022 Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ *
+ */
+
+#ifndef LTTNG_CLOCK_CLASS_H
+#define LTTNG_CLOCK_CLASS_H
+
+#include <common/compat/time.hpp>
+#include <common/uuid.hpp>
+#include <vendor/optional.hpp>
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string>
+#include <sys/time.h>
+#include <urcu/arch.h>
+#include <urcu/system.h>
+
+namespace lttng {
+namespace sessiond {
+namespace trace {
+
+class trace_class_visitor;
+
+class clock_class {
+public:
+       using cycles_t = uint64_t;
+       using scycles_t = int64_t;
+
+       const std::string name;
+       const std::string description;
+       const nonstd::optional<lttng_uuid> uuid;
+       const scycles_t offset;
+       const cycles_t frequency;
+
+       virtual void accept(trace_class_visitor& visitor) const;
+       virtual ~clock_class() = default;
+
+protected:
+       clock_class(std::string name,
+                       std::string description,
+                       nonstd::optional<lttng_uuid> uuid,
+                       scycles_t offset,
+                       cycles_t frequency);
+};
+
+} /* namespace trace */
+} /* namespace sessiond */
+} /* namespace lttng */
+
+#endif /* LTTNG_CLOCK_CLASS_H */