42 lines
677 B
Go
42 lines
677 B
Go
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package nip77
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import (
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"sync"
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)
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type idlistpool struct {
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initialsize int
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pool [][]string
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sync.Mutex
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}
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func newidlistpool(initialsize int) *idlistpool {
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ilp := idlistpool{
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initialsize: initialsize,
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pool: make([][]string, 1, 2),
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}
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ilp.pool[0] = make([]string, 0, initialsize)
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return &ilp
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}
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func (ilp *idlistpool) grab() []string {
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ilp.Lock()
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defer ilp.Unlock()
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l := len(ilp.pool)
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if l > 0 {
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idlist := ilp.pool[l-1]
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ilp.pool = ilp.pool[0 : l-1]
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return idlist
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}
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idlist := make([]string, 0, ilp.initialsize)
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return idlist
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}
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func (ilp *idlistpool) giveback(idlist []string) {
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idlist = idlist[:0]
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ilp.pool = append(ilp.pool, idlist)
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}
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