mirror of
https://github.com/octoleo/restic.git
synced 2024-11-26 14:56:29 +00:00
52 lines
1.1 KiB
Go
52 lines
1.1 KiB
Go
package restorer
|
|
|
|
// packHeap is a heap of packInfo references
|
|
// @see https://golang.org/pkg/container/heap/
|
|
// @see https://en.wikipedia.org/wiki/Heap_(data_structure)
|
|
type packHeap struct {
|
|
elements []*packInfo
|
|
|
|
// returns true if download of any of the files is in progress
|
|
inprogress func(files map[*fileInfo]struct{}) bool
|
|
}
|
|
|
|
func (pq *packHeap) Len() int { return len(pq.elements) }
|
|
|
|
func (pq *packHeap) Less(a, b int) bool {
|
|
packA, packB := pq.elements[a], pq.elements[b]
|
|
|
|
ap := pq.inprogress(packA.files)
|
|
bp := pq.inprogress(packB.files)
|
|
if ap && !bp {
|
|
return true
|
|
}
|
|
|
|
if packA.cost < packB.cost {
|
|
return true
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
func (pq *packHeap) Swap(i, j int) {
|
|
pq.elements[i], pq.elements[j] = pq.elements[j], pq.elements[i]
|
|
pq.elements[i].index = i
|
|
pq.elements[j].index = j
|
|
}
|
|
|
|
func (pq *packHeap) Push(x interface{}) {
|
|
n := len(pq.elements)
|
|
item := x.(*packInfo)
|
|
item.index = n
|
|
pq.elements = append(pq.elements, item)
|
|
}
|
|
|
|
func (pq *packHeap) Pop() interface{} {
|
|
old := pq.elements
|
|
n := len(old)
|
|
item := old[n-1]
|
|
item.index = -1 // for safety
|
|
pq.elements = old[0 : n-1]
|
|
return item
|
|
}
|