How to use the named pipe as async pipe?

[heimao63531]

i check the code in the pipe.go, and found it will create a SYNCHRONIZE pipe in makeServerPipeHandle.
access := uint32(syscall.GENERIC_READ | syscall.GENERIC_WRITE | syscall.SYNCHRONIZE)
However, i'd love to create an async pipe , how can i make it? would you provide an example?