2005-08-28 03:47:15 +00:00
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#ifndef _TFRC_H_
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#define _TFRC_H_
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/*
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* net/dccp/ccids/lib/tfrc.h
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*
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* Copyright (c) 2005 The University of Waikato, Hamilton, New Zealand.
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2006-08-27 02:01:30 +00:00
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* Copyright (c) 2005 Ian McDonald <ian.mcdonald@jandi.co.nz>
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2005-08-28 03:47:15 +00:00
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* Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
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* Copyright (c) 2003 Nils-Erik Mattsson, Joacim Haggmark, Magnus Erixzon
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/types.h>
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2006-12-10 02:04:16 +00:00
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#include <asm/div64.h>
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/* integer-arithmetic divisions of type (a * 1000000)/b */
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static inline u64 scaled_div(u64 a, u32 b)
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{
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BUG_ON(b==0);
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a *= 1000000;
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do_div(a, b);
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return a;
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}
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static inline u32 scaled_div32(u64 a, u32 b)
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{
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u64 result = scaled_div(a, b);
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if (result > UINT_MAX) {
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DCCP_CRIT("Overflow: a(%llu)/b(%u) > ~0U",
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(unsigned long long)a, b);
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return UINT_MAX;
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}
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return result;
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}
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2005-08-28 03:47:15 +00:00
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extern u32 tfrc_calc_x(u16 s, u32 R, u32 p);
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extern u32 tfrc_calc_x_reverse_lookup(u32 fvalue);
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#endif /* _TFRC_H_ */
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