sessiond: transition from lttng-ust to tracer agnostic API

[lttng-tools.git] / src / bin / lttng-sessiond / ust-registry-event.hpp

diff --git a/src/bin/lttng-sessiond/ust-registry-event.hpp b/src/bin/lttng-sessiond/ust-registry-event.hpp
new file mode 100644 (file)
index 0000000..08b18a5
--- /dev/null
+++ b/src/bin/lttng-sessiond/ust-registry-event.hpp
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2022 Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ *
+ */
+
+#ifndef LTTNG_UST_REGISTRY_EVENT_H
+#define LTTNG_UST_REGISTRY_EVENT_H
+
+#include "event-class.hpp"
+#include "field.hpp"
+
+#include <common/format.hpp>
+#include <common/hashtable/hashtable.hpp>
+#include <vendor/optional.hpp>
+
+#include <typeinfo>
+
+namespace lttng {
+namespace sessiond {
+namespace ust {
+
+/*
+ * Event registered from a UST tracer sent to the session daemon. This is
+ * indexed and matched by <event_name/signature>.
+ */
+class registry_event : public lttng::sessiond::trace::event_class {
+public:
+       registry_event(unsigned int id,
+                       unsigned int stream_class_id,
+                       int session_objd,
+                       int channel_objd,
+                       std::string name,
+                       std::string signature,
+                       std::vector<lttng::sessiond::trace::field::cuptr> fields,
+                       int loglevel_value,
+                       nonstd::optional<std::string> model_emf_uri);
+       virtual ~registry_event() = default;
+
+       /* Both objd are set by the tracer. */
+       const int session_objd;
+       const int channel_objd;
+       const std::string signature;
+
+       /*
+        * Flag for this channel if the metadata was dumped once during
+        * registration.
+        */
+       bool _metadata_dumped;
+
+       /*
+        * Node in the ust-registry hash table. The event name is used to
+        * initialize the node and the event_name/signature for the match function.
+        */
+       struct lttng_ht_node_u64 _node;
+};
+
+void registry_event_destroy(registry_event *event);
+
+} /* namespace ust */
+} /* namespace sessiond */
+} /* namespace lttng */
+
+template <>
+struct fmt::formatter<lttng::sessiond::ust::registry_event> : fmt::formatter<std::string> {
+       template <typename FormatCtx>
+       typename FormatCtx::iterator format(
+                       const lttng::sessiond::ust::registry_event& event, FormatCtx& ctx)
+       {
+               return fmt::format_to(ctx.out(),
+                               "{{ name = `{}`, signature = `{}`, id = {}, session objd = {}, channel objd = {} }}",
+                               event.name, event.signature, event.id, event.session_objd,
+                               event.channel_objd);
+       }
+};
+
+#endif /* LTTNG_UST_REGISTRY_EVENT_H */