You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
75 lines
1.8 KiB
75 lines
1.8 KiB
package mempool
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
tmsync "github.com/tendermint/tendermint/libs/sync"
|
|
"github.com/tendermint/tendermint/p2p"
|
|
)
|
|
|
|
type mempoolIDs struct {
|
|
mtx tmsync.RWMutex
|
|
peerMap map[p2p.NodeID]uint16
|
|
nextID uint16 // assumes that a node will never have over 65536 active peers
|
|
activeIDs map[uint16]struct{} // used to check if a given peerID key is used
|
|
}
|
|
|
|
func newMempoolIDs() *mempoolIDs {
|
|
return &mempoolIDs{
|
|
peerMap: make(map[p2p.NodeID]uint16),
|
|
|
|
// reserve UnknownPeerID for mempoolReactor.BroadcastTx
|
|
activeIDs: map[uint16]struct{}{UnknownPeerID: {}},
|
|
nextID: 1,
|
|
}
|
|
}
|
|
|
|
// ReserveForPeer searches for the next unused ID and assigns it to the provided
|
|
// peer.
|
|
func (ids *mempoolIDs) ReserveForPeer(peerID p2p.NodeID) {
|
|
ids.mtx.Lock()
|
|
defer ids.mtx.Unlock()
|
|
|
|
curID := ids.nextPeerID()
|
|
ids.peerMap[peerID] = curID
|
|
ids.activeIDs[curID] = struct{}{}
|
|
}
|
|
|
|
// Reclaim returns the ID reserved for the peer back to unused pool.
|
|
func (ids *mempoolIDs) Reclaim(peerID p2p.NodeID) {
|
|
ids.mtx.Lock()
|
|
defer ids.mtx.Unlock()
|
|
|
|
removedID, ok := ids.peerMap[peerID]
|
|
if ok {
|
|
delete(ids.activeIDs, removedID)
|
|
delete(ids.peerMap, peerID)
|
|
}
|
|
}
|
|
|
|
// GetForPeer returns an ID reserved for the peer.
|
|
func (ids *mempoolIDs) GetForPeer(peerID p2p.NodeID) uint16 {
|
|
ids.mtx.RLock()
|
|
defer ids.mtx.RUnlock()
|
|
|
|
return ids.peerMap[peerID]
|
|
}
|
|
|
|
// nextPeerID returns the next unused peer ID to use. We assume that the mutex
|
|
// is already held.
|
|
func (ids *mempoolIDs) nextPeerID() uint16 {
|
|
if len(ids.activeIDs) == maxActiveIDs {
|
|
panic(fmt.Sprintf("node has maximum %d active IDs and wanted to get one more", maxActiveIDs))
|
|
}
|
|
|
|
_, idExists := ids.activeIDs[ids.nextID]
|
|
for idExists {
|
|
ids.nextID++
|
|
_, idExists = ids.activeIDs[ids.nextID]
|
|
}
|
|
|
|
curID := ids.nextID
|
|
ids.nextID++
|
|
|
|
return curID
|
|
}
|