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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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