Initial QSfera import

Server/vendor/github.com/oxtoacart/bpool/bufferpool.go

@@ -0,0 +1,45 @@
+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)
+}