X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng%2Futils.hpp;h=4fa15c38d2f26a689e93d34c8896d7e1b8fb8bdc;hb=9497e2f771b05ba0cf6ca690f24f73cadc8c6e1d;hp=bb1c2cdfbbbbeba767fec438a51d3d14c9750f17;hpb=c9e313bc594f40a86eed237dce222c0fc99c957f;p=lttng-tools.git

diff --git a/src/bin/lttng/utils.hpp b/src/bin/lttng/utils.hpp
index bb1c2cdfb..4fa15c38d 100644
--- a/src/bin/lttng/utils.hpp
+++ b/src/bin/lttng/utils.hpp
@@ -8,19 +8,158 @@
 #ifndef _LTTNG_UTILS_H
 #define _LTTNG_UTILS_H
 
-#include <popt.h>
 #include <common/argpar/argpar.h>
 #include <common/dynamic-array.hpp>
+#include <common/make-unique-wrapper.hpp>
 
 #include <lttng/lttng.h>
 
+#include <iterator>
+#include <memory>
+#include <popt.h>
+
 extern char *opt_relayd_path;
 extern int opt_no_sessiond;
-extern char * opt_sessiond_path;
+extern char *opt_sessiond_path;
 extern pid_t sessiond_pid;
 
 struct cmd_struct;
 
+struct session_spec {
+	enum type {
+		NAME,
+		GLOB_PATTERN,
+		ALL,
+	};
+
+	type type;
+	const char *value;
+};
+
+/*
+ * We don't use a std::vector here because it would make a copy of the C array.
+ */
+class session_list {
+	template <typename ContainerType, typename DereferenceReturnType>
+	class iterator_template : public std::iterator<std::random_access_iterator_tag, std::size_t> {
+	public:
+		explicit iterator_template(ContainerType& list, std::size_t k) : _list(list), _index(k)
+		{
+		}
+
+		iterator_template& operator++() noexcept
+		{
+			++_index;
+			return *this;
+		}
+
+		iterator_template& operator--() noexcept
+		{
+			--_index;
+			return *this;
+		}
+
+		iterator_template& operator++(int) noexcept
+		{
+			_index++;
+			return *this;
+		}
+
+		iterator_template& operator--(int) noexcept
+		{
+			_index--;
+			return *this;
+		}
+
+		bool operator==(iterator_template other) const noexcept
+		{
+			return _index == other._index;
+		}
+
+		bool operator!=(iterator_template other) const noexcept
+		{
+			return !(*this == other);
+		}
+
+		DereferenceReturnType& operator*() const noexcept
+		{
+			return _list[_index];
+		}
+
+	private:
+		ContainerType& _list;
+		std::size_t _index;
+	};
+
+	using iterator = iterator_template<session_list, lttng_session>;
+	using const_iterator = iterator_template<const session_list, const lttng_session>;
+
+public:
+	session_list() : _sessions_count(0), _sessions(nullptr)
+	{
+	}
+
+	session_list(session_list&& original, std::size_t new_count)
+	{
+		_sessions_count = new_count;
+		_sessions = std::move(original._sessions);
+	}
+
+	session_list(struct lttng_session *raw_sessions, std::size_t raw_sessions_count)
+	{
+		_sessions_count = raw_sessions_count;
+		_sessions.reset(raw_sessions);
+	}
+
+	iterator begin() noexcept
+	{
+		return iterator(*this, 0);
+	}
+
+	iterator end() noexcept
+	{
+		return iterator(*this, _sessions_count);
+	}
+
+	const_iterator begin() const noexcept
+	{
+		return const_iterator(*this, 0);
+	}
+
+	const_iterator end() const noexcept
+	{
+		return const_iterator(*this, _sessions_count);
+	}
+
+	std::size_t size() const noexcept
+	{
+		return _sessions_count;
+	}
+
+	void resize(std::size_t new_size) noexcept
+	{
+		_sessions_count = new_size;
+	}
+
+	lttng_session& operator[](std::size_t index)
+	{
+		LTTNG_ASSERT(index < _sessions_count);
+		return _sessions.get()[index];
+	}
+
+	const lttng_session& operator[](std::size_t index) const
+	{
+		LTTNG_ASSERT(index < _sessions_count);
+		return _sessions.get()[index];
+	}
+
+private:
+	std::size_t _sessions_count;
+	std::unique_ptr<lttng_session,
+			lttng::details::create_unique_class<lttng_session, lttng::free>>
+		_sessions;
+};
+
 char *get_session_name(void);
 char *get_session_name_quiet(void);
 void list_commands(struct cmd_struct *commands, FILE *ofp);
@@ -47,8 +186,7 @@ int get_count_order_ulong(unsigned long x);
 
 const char *get_event_type_str(enum lttng_event_type event_type);
 
-int print_missing_or_multiple_domains(unsigned int domain_count,
-		bool include_agent_domains);
+int print_missing_or_multiple_domains(unsigned int domain_count, bool include_agent_domains);
 
 int spawn_relayd(const char *pathname, int port);
 int check_relayd(void);
@@ -56,11 +194,12 @@ void print_session_stats(const char *session_name);
 int get_session_stats_str(const char *session_name, char **str);
 int show_cmd_help(const char *cmd_name, const char *help_msg);
 
-int print_trace_archive_location(
-		const struct lttng_trace_archive_location *location,
-		const char *session_name);
+int print_trace_archive_location(const struct lttng_trace_archive_location *location,
+				 const char *session_name);
 
 int validate_exclusion_list(const char *event_name,
-		const struct lttng_dynamic_pointer_array *exclusions);
+			    const struct lttng_dynamic_pointer_array *exclusions);
+
+session_list list_sessions(const struct session_spec& spec);
 
 #endif /* _LTTNG_UTILS_H */