premiere-libtorrent/include/libtorrent/session_stats.hpp

/*

Copyright (c) 2012-2018, Arvid Norberg
All rights reserved.

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modification, are permitted provided that the following conditions
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    * Redistributions in binary form must reproduce the above copyright
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      the documentation and/or other materials provided with the distribution.
    * Neither the name of the author nor the names of its
      contributors may be used to endorse or promote products derived
      from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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*/

#ifndef TORRENT_SESSION_STATS_HPP_INCLUDED
#define TORRENT_SESSION_STATS_HPP_INCLUDED

#include "libtorrent/config.hpp"
#include "libtorrent/string_view.hpp"

#include <vector>

namespace libtorrent {

	enum class metric_type_t
	{
		counter, gauge
	};

	// describes one statistics metric from the session. For more information,
	// see the session-statistics_ section.
	struct TORRENT_EXPORT stats_metric
	{
		char const* name;
		int value_index;
#if TORRENT_ABI_VERSION == 1
		static constexpr metric_type_t TORRENT_DEPRECATED_MEMBER type_counter = metric_type_t::counter;
		static constexpr metric_type_t TORRENT_DEPRECATED_MEMBER type_gauge = metric_type_t::gauge;
#endif
		metric_type_t type;
	};

	// This free function returns the list of available metrics exposed by
	// libtorrent's statistics API. Each metric has a name and a *value index*.
	// The value index is the index into the array in session_stats_alert where
	// this metric's value can be found when the session stats is sampled (by
	// calling post_session_stats()).
	TORRENT_EXPORT std::vector<stats_metric> session_stats_metrics();

	// given a name of a metric, this function returns the counter index of it,
	// or -1 if it could not be found. The counter index is the index into the
	// values array returned by session_stats_alert.
	TORRENT_EXPORT int find_metric_idx(string_view name);
}

#endif