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| Original file line number | Diff line number | Diff line change |
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| @@ -1,6 +1,6 @@ | ||
| FROM ubuntu:20.04 as builder | ||
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| ARG GO_VERSION="1.20.6" | ||
| ARG GO_VERSION="1.20.7" | ||
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| ARG CHANNEL | ||
| ARG URL | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,83 @@ | ||
| // Copyright (C) 2019-2023 Algorand, Inc. | ||
| // This file is part of go-algorand | ||
| // | ||
| // go-algorand is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU Affero General Public License as | ||
| // published by the Free Software Foundation, either version 3 of the | ||
| // License, or (at your option) any later version. | ||
| // | ||
| // go-algorand is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU Affero General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU Affero General Public License | ||
| // along with go-algorand. If not, see <https://www.gnu.org/licenses/>. | ||
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| package agreement | ||
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| import ( | ||
| "sort" | ||
| "time" | ||
| ) | ||
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| // credentialArrivalHistory maintains a circular buffer of time.Duration samples. | ||
| type credentialArrivalHistory struct { | ||
| history []time.Duration | ||
| writePtr int | ||
| full bool | ||
| } | ||
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| func makeCredentialArrivalHistory(size int) credentialArrivalHistory { | ||
| if size < 0 { | ||
| panic("can't create CredentialArrivalHistory with negative size") | ||
| } | ||
| history := credentialArrivalHistory{history: make([]time.Duration, size)} | ||
| history.reset() | ||
| return history | ||
| } | ||
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| // store saves a new sample into the circular buffer. | ||
| // If the buffer is full, it overwrites the oldest sample. | ||
| func (history *credentialArrivalHistory) store(sample time.Duration) { | ||
| if len(history.history) == 0 { | ||
| return | ||
| } | ||
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| history.history[history.writePtr] = sample | ||
| history.writePtr++ | ||
| if history.writePtr == len(history.history) { | ||
| history.full = true | ||
| history.writePtr = 0 | ||
| } | ||
| } | ||
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| // reset marks the history buffer as empty | ||
| func (history *credentialArrivalHistory) reset() { | ||
| history.writePtr = 0 | ||
| history.full = false | ||
| } | ||
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| // isFull checks if the circular buffer has been fully populated at least once. | ||
| func (history *credentialArrivalHistory) isFull() bool { | ||
| return history.full | ||
| } | ||
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| // orderStatistics returns the idx'th time duration in the sorted history array. | ||
| // It assumes that history is full and the idx is within the array bounds, and | ||
| // panics if either of these assumptions doesn't hold. | ||
| func (history *credentialArrivalHistory) orderStatistics(idx int) time.Duration { | ||
| if !history.isFull() { | ||
| panic("history not full") | ||
| } | ||
| if idx < 0 || idx >= len(history.history) { | ||
| panic("index out of bounds") | ||
| } | ||
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| // if history.history is long, then we could optimize this function to use | ||
| // the linear time order statistics algorithm. | ||
| sortedArrivals := make([]time.Duration, len(history.history)) | ||
| copy(sortedArrivals[:], history.history[:]) | ||
| sort.Slice(sortedArrivals, func(i, j int) bool { return sortedArrivals[i] < sortedArrivals[j] }) | ||
| return sortedArrivals[idx] | ||
| } |
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