mirror of
https://github.com/transmission/transmission
synced 2024-12-27 01:57:52 +00:00
f2b4a59eda
If we use composition on these objects we can save a handful of pointers per peer. This isn't a big deal, but it's an easy/safe change to do.
69 lines
2.1 KiB
C
69 lines
2.1 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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struct tr_history_slice
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{
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unsigned int n;
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time_t date;
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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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int sliceCount;
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unsigned int precision;
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struct tr_history_slice * slices;
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}
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tr_recentHistory;
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/**
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* @brief construct a new tr_recentHistory object
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* @param seconds how many seconds of history this object should remember
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* @param precision how precise the history should be, in seconds
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* For a precision of 10 seconds and a history of 2 minutes, makes 12 bins.
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*/
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void tr_historyConstruct( tr_recentHistory *, unsigned int seconds, unsigned int precision );
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/** @brief destruct an existing tr_recentHistory object. */
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void tr_historyDestruct( 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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