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// Copyright (c) 2019 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package tally
// ObjectPool is an minimalistic object pool to avoid
// any circular dependencies on any other object pool.
type ObjectPool struct {
values chan interface{}
alloc func() interface{}
}
// NewObjectPool creates a new pool.
func NewObjectPool(size int) *ObjectPool {
return &ObjectPool{
values: make(chan interface{}, size),
}
}
// Init initializes the object pool.
func (p *ObjectPool) Init(alloc func() interface{}) {
p.alloc = alloc
for i := 0; i < cap(p.values); i++ {
p.values <- p.alloc()
}
}
// Get gets an object from the pool.
func (p *ObjectPool) Get() interface{} {
var v interface{}
select {
case v = <-p.values:
default:
v = p.alloc()
}
return v
}
// Put puts an object back to the pool.
func (p *ObjectPool) Put(obj interface{}) {
select {
case p.values <- obj:
default:
}
}
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