' Copyright 2017 <chaishushan{AT}gmail.com>. All rights reserved.
' Use of this source code is governed by a Apache
' license that can be found in the LICENSE file.

@startuml

title int32 <=> *C.char

participant int32
participant uintptr
participant unsafe.Pointer as unsafe_Pointer
participant "~*C.char" as c_char_ptr

== Go ==

int32 -> uintptr: int32 to uintptr
uintptr -> unsafe_Pointer: uintptr to unsafe.Pointer

== CGO ==

unsafe_Pointer -> c_char_ptr: unsafe.Pointer to *C.char
c_char_ptr -> unsafe_Pointer: ~*C.char to unsafe.Pointer

== Go ==

unsafe_Pointer -> uintptr: unsafe.Pointer to uintptr
uintptr -> int32: uintptr to int32

@enduml