46 lines
947 B
Go
46 lines
947 B
Go
package bpool
|
|
|
|
import (
|
|
"bytes"
|
|
)
|
|
|
|
// BufferPool implements a pool of bytes.Buffers in the form of a bounded
|
|
// channel.
|
|
type BufferPool struct {
|
|
c chan *bytes.Buffer
|
|
}
|
|
|
|
// NewBufferPool creates a new BufferPool bounded to the given size.
|
|
func NewBufferPool(size int) (bp *BufferPool) {
|
|
return &BufferPool{
|
|
c: make(chan *bytes.Buffer, size),
|
|
}
|
|
}
|
|
|
|
// Get gets a Buffer from the BufferPool, or creates a new one if none are
|
|
// available in the pool.
|
|
func (bp *BufferPool) Get() (b *bytes.Buffer) {
|
|
select {
|
|
case b = <-bp.c:
|
|
// reuse existing buffer
|
|
default:
|
|
// create new buffer
|
|
b = bytes.NewBuffer([]byte{})
|
|
}
|
|
return
|
|
}
|
|
|
|
// Put returns the given Buffer to the BufferPool.
|
|
func (bp *BufferPool) Put(b *bytes.Buffer) {
|
|
b.Reset()
|
|
select {
|
|
case bp.c <- b:
|
|
default: // Discard the buffer if the pool is full.
|
|
}
|
|
}
|
|
|
|
// NumPooled returns the number of items currently pooled.
|
|
func (bp *BufferPool) NumPooled() int {
|
|
return len(bp.c)
|
|
}
|