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package pools
import (
"bufio"
"io"
"sync"
)
// BufioReaderPool is a pooled allocator for bufio.Reader objects.
type BufioReaderPool interface {
// Get fetches a bufio.Reader from pool and resets to supplied reader
Get(io.Reader) *bufio.Reader
// Put places supplied bufio.Reader back in pool
Put(*bufio.Reader)
}
// NewBufioReaderPool returns a newly instantiated bufio.Reader pool.
func NewBufioReaderPool(size int) BufioReaderPool {
return &bufioReaderPool{
pool: sync.Pool{
New: func() interface{} {
return bufio.NewReaderSize(nil, size)
},
},
size: size,
}
}
// bufioReaderPool is our implementation of BufioReaderPool.
type bufioReaderPool struct {
pool sync.Pool
size int
}
func (p *bufioReaderPool) Get(r io.Reader) *bufio.Reader {
br := p.pool.Get().(*bufio.Reader)
br.Reset(r)
return br
}
func (p *bufioReaderPool) Put(br *bufio.Reader) {
if br.Size() < p.size {
return
}
br.Reset(nil)
p.pool.Put(br)
}
// BufioWriterPool is a pooled allocator for bufio.Writer objects.
type BufioWriterPool interface {
// Get fetches a bufio.Writer from pool and resets to supplied writer
Get(io.Writer) *bufio.Writer
// Put places supplied bufio.Writer back in pool
Put(*bufio.Writer)
}
// NewBufioWriterPool returns a newly instantiated bufio.Writer pool.
func NewBufioWriterPool(size int) BufioWriterPool {
return &bufioWriterPool{
pool: sync.Pool{
New: func() interface{} {
return bufio.NewWriterSize(nil, size)
},
},
size: size,
}
}
// bufioWriterPool is our implementation of BufioWriterPool.
type bufioWriterPool struct {
pool sync.Pool
size int
}
func (p *bufioWriterPool) Get(w io.Writer) *bufio.Writer {
bw := p.pool.Get().(*bufio.Writer)
bw.Reset(w)
return bw
}
func (p *bufioWriterPool) Put(bw *bufio.Writer) {
if bw.Size() < p.size {
return
}
bw.Reset(nil)
p.pool.Put(bw)
}
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