// Copyright (c) 2016 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 core

import "sync"

// A Pool is a type-safe wrapper around a sync.Pool.
type Pool struct {
	p *sync.Pool
}

// NewPool constructs a new Pool.
func NewPool(size int) Pool {
	if size == 0 {
		size = _size
	}
	return Pool{p: &sync.Pool{
		New: func() interface{} {
			return &Buffer{bs: make([]byte, 0, size)}
		},
	}}
}

// Get retrieves a Buffer from the pool, creating one if necessary.
func (p Pool) Get() *Buffer {
	buf := p.p.Get().(*Buffer)
	buf.Reset()
	buf.pool = p
	return buf
}

func (p Pool) put(buf *Buffer) {
	p.p.Put(buf)
}