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.
108 lines
2.7 KiB
108 lines
2.7 KiB
// Copyright 2016 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library 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 Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
//go:build (darwin && !ios) || freebsd || (linux && !arm64) || netbsd || solaris
|
|
|
|
package keystore
|
|
|
|
import (
|
|
"time"
|
|
|
|
"github.com/ethereum/go-ethereum/log"
|
|
"github.com/rjeczalik/notify"
|
|
)
|
|
|
|
type watcher struct {
|
|
ac *accountCache
|
|
starting bool
|
|
running bool
|
|
ev chan notify.EventInfo
|
|
quit chan struct{}
|
|
}
|
|
|
|
func newWatcher(ac *accountCache) *watcher {
|
|
return &watcher{
|
|
ac: ac,
|
|
ev: make(chan notify.EventInfo, 10),
|
|
quit: make(chan struct{}),
|
|
}
|
|
}
|
|
|
|
// starts the watcher loop in the background.
|
|
// Start a watcher in the background if that's not already in progress.
|
|
// The caller must hold w.ac.mu.
|
|
func (w *watcher) start() {
|
|
if w.starting || w.running {
|
|
return
|
|
}
|
|
w.starting = true
|
|
go w.loop()
|
|
}
|
|
|
|
func (w *watcher) close() {
|
|
close(w.quit)
|
|
}
|
|
|
|
func (w *watcher) loop() {
|
|
defer func() {
|
|
w.ac.mu.Lock()
|
|
w.running = false
|
|
w.starting = false
|
|
w.ac.mu.Unlock()
|
|
}()
|
|
logger := log.New("path", w.ac.keydir)
|
|
|
|
if err := notify.Watch(w.ac.keydir, w.ev, notify.All); err != nil {
|
|
logger.Trace("Failed to watch keystore folder", "err", err)
|
|
return
|
|
}
|
|
defer notify.Stop(w.ev)
|
|
logger.Trace("Started watching keystore folder")
|
|
defer logger.Trace("Stopped watching keystore folder")
|
|
|
|
w.ac.mu.Lock()
|
|
w.running = true
|
|
w.ac.mu.Unlock()
|
|
|
|
// Wait for file system events and reload.
|
|
// When an event occurs, the reload call is delayed a bit so that
|
|
// multiple events arriving quickly only cause a single reload.
|
|
var (
|
|
debounceDuration = 500 * time.Millisecond
|
|
rescanTriggered = false
|
|
debounce = time.NewTimer(0)
|
|
)
|
|
// Ignore initial trigger
|
|
if !debounce.Stop() {
|
|
<-debounce.C
|
|
}
|
|
defer debounce.Stop()
|
|
for {
|
|
select {
|
|
case <-w.quit:
|
|
return
|
|
case <-w.ev:
|
|
// Trigger the scan (with delay), if not already triggered
|
|
if !rescanTriggered {
|
|
debounce.Reset(debounceDuration)
|
|
rescanTriggered = true
|
|
}
|
|
case <-debounce.C:
|
|
w.ac.scanAccounts()
|
|
rescanTriggered = false
|
|
}
|
|
}
|
|
}
|
|
|