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les: create utilities as common package (#20509)

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* les: move execqueue into utilities package

execqueue is a util for executing queued functions
in a serial order which is used by both les server
and les client. Move it to common package.

* les: move randselect to utilities package

weighted_random_selector is a helpful tool for randomly select
items maintained in a set but based on the item weight.

It's used anywhere is LES package, mainly by les client but will
be used in les server with very high chance. So move it into a
common package as the second step for les separation.

* les: rename to utils
This commit is contained in:
gary rong
2020-03-31 23:17:24 +08:00
committed by GitHub
parent 32d31c31af
commit f78ffc0545
7 changed files with 90 additions and 90 deletions
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9
les/distributor.go
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@ -22,6 +22,7 @@ import (
"time"
"github.com/ethereum/go-ethereum/common/mclock"
"github.com/ethereum/go-ethereum/les/utils"
)
// requestDistributor implements a mechanism that distributes requests to
@ -194,7 +195,7 @@ func (d *requestDistributor) nextRequest() (distPeer, *distReq, time.Duration) {
elem := d.reqQueue.Front()
var (
bestWait time.Duration
sel *weightedRandomSelect
sel *utils.WeightedRandomSelect
)
d.peerLock.RLock()
@ -219,9 +220,9 @@ func (d *requestDistributor) nextRequest() (distPeer, *distReq, time.Duration) {
wait, bufRemain := peer.waitBefore(cost)
if wait == 0 {
if sel == nil {
sel = newWeightedRandomSelect()
sel = utils.NewWeightedRandomSelect()
}
sel.update(selectPeerItem{peer: peer, req: req, weight: int64(bufRemain*1000000) + 1})
sel.Update(selectPeerItem{peer: peer, req: req, weight: int64(bufRemain*1000000) + 1})
} else {
if bestWait == 0 || wait < bestWait {
bestWait = wait
@ -239,7 +240,7 @@ func (d *requestDistributor) nextRequest() (distPeer, *distReq, time.Duration) {
}
if sel != nil {
c := sel.choose().(selectPeerItem)
c := sel.Choose().(selectPeerItem)
return c.peer, c.req, 0
}
return nil, nil, bestWait