From e101550a9a8b956434cf2a73f66afbb42f4654bd Mon Sep 17 00:00:00 2001 From: Taylor Hutt Date: Sun, 24 Feb 2013 17:33:13 +0000 Subject: sandbox: Improve sandbox serial port keyboard interface Implements the tstc() interface for the serial driver. Multiplexing the console between the serial port and a keyboard uses a polling method of checking if characters are available; this means that the serial console must be non-blocking when attempting to read characters. Signed-off-by: Taylor Hutt Signed-off-by: Simon Glass --- arch/sandbox/cpu/os.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'arch/sandbox/cpu/os.c') diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c index 36637af6ce..3e37c930b0 100644 --- a/arch/sandbox/cpu/os.c +++ b/arch/sandbox/cpu/os.c @@ -44,6 +44,14 @@ ssize_t os_read(int fd, void *buf, size_t count) return read(fd, buf, count); } +ssize_t os_read_no_block(int fd, void *buf, size_t count) +{ + const int flags = fcntl(fd, F_GETFL, 0); + + fcntl(fd, F_SETFL, flags | O_NONBLOCK); + return os_read(fd, buf, count); +} + ssize_t os_write(int fd, const void *buf, size_t count) { return write(fd, buf, count); -- cgit v1.2.1