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74 lines
2.6 KiB
C++
74 lines
2.6 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of rippled: https://github.com/ripple/rippled
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Copyright (c) 2012, 2013 Ripple Labs Inc.
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#include <BeastConfig.h>
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#include <ripple/app/ledger/LedgerTiming.h>
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#include <ripple/basics/Log.h>
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#include <algorithm>
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#include <iterator>
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namespace ripple {
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int getNextLedgerTimeResolution (
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int previousResolution,
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bool previousAgree,
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std::uint32_t ledgerSeq)
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{
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assert (ledgerSeq);
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// Find the current resolution:
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auto iter = std::find (std::begin (ledgerPossibleTimeResolutions),
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std::end (ledgerPossibleTimeResolutions), previousResolution);
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assert (iter != std::end (ledgerPossibleTimeResolutions));
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// This should never happen, but just as a precaution
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if (iter == std::end (ledgerPossibleTimeResolutions))
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return previousResolution;
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// If we did not previously agree, we try to decrease the resolution to
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// improve the chance that we will agree now.
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if (!previousAgree && ledgerSeq % decreaseLedgerTimeResolutionEvery == 0)
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{
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if (++iter != std::end (ledgerPossibleTimeResolutions))
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return *iter;
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}
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// If we previously agreed, we try to increase the resolution to determine
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// if we can continue to agree.
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if (previousAgree && ledgerSeq % increaseLedgerTimeResolutionEvery == 0)
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{
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if (iter-- != std::begin (ledgerPossibleTimeResolutions))
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return *iter;
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}
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return previousResolution;
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}
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std::uint32_t roundCloseTime (
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std::uint32_t closeTime,
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std::uint32_t closeResolution)
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{
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if (closeTime == 0)
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return 0;
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closeTime += (closeResolution / 2);
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return closeTime - (closeTime % closeResolution);
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}
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} // ripple
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