= Monoio IO Wrapper An io wrapper to bind std io and monoio async io.
|=== |Return |do_io |read / write
.2+|SafeIO .2+| Current async r/w result | 1. WouldBlock: Empty(r) or Full(w) and need calling do_io
|2. Other: success io or last do_io error
.2+|UnsafeIO | 1. WouldBlock: Not capture mem block info, need calling read / write | 1. WouldBlock: mem block info is captured and need calling do_io
|2. Other: current async r/w result | 2. Other: success io or last do_io error
|===