mirror of
https://github.com/octoleo/syncthing.git
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153 lines
3.1 KiB
Go
153 lines
3.1 KiB
Go
// Copyright (C) 2014 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at http://mozilla.org/MPL/2.0/.
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package model
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import (
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"math/rand"
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"sort"
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"github.com/syncthing/syncthing/lib/sync"
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)
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type jobQueue struct {
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progress []string
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queued []jobQueueEntry
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mut sync.Mutex
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}
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type jobQueueEntry struct {
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name string
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size int64
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modified int64
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}
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func newJobQueue() *jobQueue {
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return &jobQueue{
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mut: sync.NewMutex(),
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}
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}
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func (q *jobQueue) Push(file string, size, modified int64) {
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q.mut.Lock()
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q.queued = append(q.queued, jobQueueEntry{file, size, modified})
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q.mut.Unlock()
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}
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func (q *jobQueue) Pop() (string, bool) {
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q.mut.Lock()
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defer q.mut.Unlock()
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if len(q.queued) == 0 {
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return "", false
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}
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f := q.queued[0].name
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q.queued = q.queued[1:]
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q.progress = append(q.progress, f)
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return f, true
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}
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func (q *jobQueue) BringToFront(filename string) {
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q.mut.Lock()
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defer q.mut.Unlock()
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for i, cur := range q.queued {
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if cur.name == filename {
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if i > 0 {
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// Shift the elements before the selected element one step to
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// the right, overwriting the selected element
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copy(q.queued[1:i+1], q.queued[0:])
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// Put the selected element at the front
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q.queued[0] = cur
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}
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return
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}
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}
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}
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func (q *jobQueue) Done(file string) {
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q.mut.Lock()
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defer q.mut.Unlock()
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for i := range q.progress {
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if q.progress[i] == file {
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copy(q.progress[i:], q.progress[i+1:])
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q.progress = q.progress[:len(q.progress)-1]
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return
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}
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}
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}
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func (q *jobQueue) Jobs() ([]string, []string) {
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q.mut.Lock()
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defer q.mut.Unlock()
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progress := make([]string, len(q.progress))
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copy(progress, q.progress)
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queued := make([]string, len(q.queued))
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for i := range q.queued {
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queued[i] = q.queued[i].name
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}
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return progress, queued
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}
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func (q *jobQueue) Shuffle() {
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q.mut.Lock()
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defer q.mut.Unlock()
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l := len(q.queued)
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for i := range q.queued {
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r := rand.Intn(l)
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q.queued[i], q.queued[r] = q.queued[r], q.queued[i]
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}
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}
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func (q *jobQueue) SortSmallestFirst() {
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q.mut.Lock()
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defer q.mut.Unlock()
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sort.Sort(smallestFirst(q.queued))
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}
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func (q *jobQueue) SortLargestFirst() {
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q.mut.Lock()
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defer q.mut.Unlock()
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sort.Sort(sort.Reverse(smallestFirst(q.queued)))
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}
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func (q *jobQueue) SortOldestFirst() {
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q.mut.Lock()
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defer q.mut.Unlock()
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sort.Sort(oldestFirst(q.queued))
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}
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func (q *jobQueue) SortNewestFirst() {
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q.mut.Lock()
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defer q.mut.Unlock()
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sort.Sort(sort.Reverse(oldestFirst(q.queued)))
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}
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// The usual sort.Interface boilerplate
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type smallestFirst []jobQueueEntry
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func (q smallestFirst) Len() int { return len(q) }
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func (q smallestFirst) Less(a, b int) bool { return q[a].size < q[b].size }
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func (q smallestFirst) Swap(a, b int) { q[a], q[b] = q[b], q[a] }
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type oldestFirst []jobQueueEntry
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func (q oldestFirst) Len() int { return len(q) }
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func (q oldestFirst) Less(a, b int) bool { return q[a].modified < q[b].modified }
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func (q oldestFirst) Swap(a, b int) { q[a], q[b] = q[b], q[a] }
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