Grissiom d683d32bd5 device/pipe: add nonblocking read/write and force write mode
The previous implementation will always blocks the reader/writer.
However, at least FinSh would expect the device to be nonblocking ---
read should return 0 when there is no data in it.
2013-08-19 15:35:56 +08:00
..
2013-07-24 07:33:48 +08:00