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45 lines
820 B
45 lines
820 B
// Copyright 2015 The Tango Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package tango
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import (
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"reflect"
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"sync"
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)
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type pool struct {
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size int
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tp reflect.Type
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stp reflect.Type
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pool reflect.Value
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cur int
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lock sync.Mutex
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}
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func newPool(size int, tp reflect.Type) *pool {
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return &pool{
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size: size,
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cur: 0,
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pool: reflect.MakeSlice(reflect.SliceOf(tp), 0, 0), // init for don't allocate memory
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tp: reflect.SliceOf(tp),
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stp: tp,
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}
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}
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func (p *pool) New() reflect.Value {
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if p.size == 0 {
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return reflect.New(p.stp)
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}
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p.lock.Lock()
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if p.cur == p.pool.Len() {
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p.pool = reflect.MakeSlice(p.tp, p.size, p.size)
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p.cur = 0
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}
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res := p.pool.Index(p.cur).Addr()
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p.cur++
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p.lock.Unlock()
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return res
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}
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