Function Factory

zpack/packfactory.go:20–26

* Factory Generates different packaging and unpackaging methods, singleton (生成不同封包解包的方式，单例) */

()

	(生成不同封包解包的方式，单例)
*/
func Factory() *pack_factory {
	pack_once.Do(func() {
		factoryInstance = new(pack_factory)
	})

	return factoryInstance
}

// NewPack creates a concrete packaging and unpackaging object
// (NewPack 创建一个具体的拆包解包对象)