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package render
import "bytes"
// bufPool represents a reusable buffer pool for executing templates into.
var bufPool *BufferPool
// BufferPool implements a pool of bytes.Buffers in the form of a bounded channel.
// Pulled from the github.com/oxtoacart/bpool package (Apache licensed).
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.
}
}
// Initialize buffer pool for writing templates into.
func init() {
bufPool = NewBufferPool(64)
}
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