mirror of https://github.com/prometheus/prometheus
46 lines
1005 B
Go
46 lines
1005 B
Go
// Copyright 2013 Prometheus Team
|
|
// 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 utility
|
|
|
|
type FreeList chan interface{}
|
|
|
|
func NewFreeList(cap int) FreeList {
|
|
return make(FreeList, cap)
|
|
}
|
|
|
|
func (l FreeList) Get() (interface{}, bool) {
|
|
select {
|
|
case v := <-l:
|
|
return v, true
|
|
default:
|
|
return nil, false
|
|
}
|
|
}
|
|
|
|
func (l FreeList) Give(v interface{}) bool {
|
|
select {
|
|
case l <- v:
|
|
return true
|
|
default:
|
|
return false
|
|
}
|
|
}
|
|
|
|
func (l FreeList) Close() {
|
|
close(l)
|
|
|
|
for _ = range l {
|
|
}
|
|
}
|