diff options
| author | Taylor Hutt <thutt@chromium.org> | 2013-02-24 17:33:13 +0000 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2013-02-28 19:09:21 -0800 |
| commit | e101550a9a8b956434cf2a73f66afbb42f4654bd (patch) | |
| tree | 9b3779554981488f9fead9eab91eadfbdc0a1d2d /include | |
| parent | bda32ffcf712806c7880ded25a012fbeede35e80 (diff) | |
| download | u-boot-imx-e101550a9a8b956434cf2a73f66afbb42f4654bd.zip u-boot-imx-e101550a9a8b956434cf2a73f66afbb42f4654bd.tar.gz u-boot-imx-e101550a9a8b956434cf2a73f66afbb42f4654bd.tar.bz2 | |
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 <thutt@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/os.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/os.h b/include/os.h index 699682a..c452d1b 100644 --- a/include/os.h +++ b/include/os.h @@ -40,6 +40,16 @@ struct sandbox_state; ssize_t os_read(int fd, void *buf, size_t count); /** + * Access to the OS read() system call with non-blocking access + * + * \param fd File descriptor as returned by os_open() + * \param buf Buffer to place data + * \param count Number of bytes to read + * \return number of bytes read, or -1 on error + */ +ssize_t os_read_no_block(int fd, void *buf, size_t count); + +/** * Access to the OS write() system call * * \param fd File descriptor as returned by os_open() |