Function newLinkBufferNode

nocopy_linkbuffer.go:842–855

------------------------------------------ implement link node ------------------------------------------ newLinkBufferNode create or reuse linkBufferNode. Nodes with size <= 0 are marked as readonly, which means the node.buf is not allocated by this mcache.

(size int)

// newLinkBufferNode create or reuse linkBufferNode.
// Nodes with size <= 0 are marked as readonly, which means the node.buf is not allocated by this mcache.
func newLinkBufferNode(size int) *linkBufferNode {
	node := linkedPool.Get().(*linkBufferNode)
	// reset node offset
	node.off, node.malloc, node.refer, node.mode = 0, 0, 1, defaultLinkBufferMode
	if size <= 0 {
		node.setFlag(flagUnmanaged)
		return node
	}
	if size < LinkBufferCap {
		size = LinkBufferCap
	}
	node.buf = malloc(0, size)
	return node
}

var linkedPool = sync.Pool{
	New: func() interface{} {