blob: a0152b8fd679b0c82d06b9fa6abeb70a580537b2 [file] [log] [blame]
// Copyright 2017 Istio Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package queue
import (
"fmt"
"time"
)
// WaitForClose blocks until the Instance has stopped processing tasks or the timeout expires.
// If the timeout is zero, it will wait until the queue is done processing.
// WaitForClose an error if the timeout expires.
func WaitForClose(q Instance, timeout time.Duration) error {
closed := q.Closed()
if timeout == 0 {
<-closed
return nil
}
timer := time.NewTimer(timeout)
defer timer.Stop()
select {
case <-closed:
return nil
case <-timer.C:
return fmt.Errorf("timeout waiting for queue to close after %v", timeout)
}
}