mirror of
https://github.com/transmission/transmission
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62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
/*
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* This file Copyright (C) Mnemosyne LLC
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*
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* This file is licensed by the GPL version 2. Works owned by the
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* Transmission project are granted a special exemption to clause 2 (b)
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* so that the bulk of its code can remain under the MIT license.
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* This exemption does not extend to derived works not owned by
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* the Transmission project.
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*
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* $Id$
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*/
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#ifndef __TRANSMISSION__
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#error only libtransmission should #include this header.
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#endif
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#ifndef TR_RECENT_HISTORY_H
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#define TR_RECENT_HISTORY_H
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/**
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* A generic short-term memory object that remembers how many times
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* something happened over the last N seconds.
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*
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* For example, it could count how many are bytes transferred
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* to estimate the speed over the last N seconds.
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*/
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enum
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{
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TR_RECENT_HISTORY_PERIOD_SEC = 60
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};
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typedef struct tr_recentHistory
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{
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/* these are PRIVATE IMPLEMENTATION details included for composition only.
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* Don't access these directly! */
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int newest;
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struct {
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unsigned int n;
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time_t date;
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} slices[TR_RECENT_HISTORY_PERIOD_SEC];
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}
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tr_recentHistory;
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/**
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* @brief add a counter to the recent history object.
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* @param when the current time in sec, such as from tr_time ()
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* @param n how many items to add to the history's counter
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*/
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void tr_historyAdd (tr_recentHistory *, time_t when, unsigned int n);
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/**
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* @brief count how many events have occurred in the last N seconds.
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* @param when the current time in sec, such as from tr_time ()
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* @param seconds how many seconds to count back through.
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*/
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unsigned int tr_historyGet (const tr_recentHistory *, time_t when, unsigned int seconds);
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#endif
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