Re: [PATCH 3/5] timeout: factor out wait-for-key-press loop into separate file

[Marc Kleine-Budde <mkl@pengutronix.de>]

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On 04/20/2015 01:13 PM, Sascha Hauer wrote:
> On Mon, Apr 20, 2015 at 10:43:37AM +0200, Marc Kleine-Budde wrote:
>> This patch factors out the wait-for-key-press loop from the shell command
>> "timeout" into a sparate file, so that it can be used from C, too.
>>
>> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
>> ---
>>  commands/Kconfig         |  1 +
>>  commands/timeout.c       | 62 ++++++++++-----------------------------------
>>  common/Kconfig           |  3 +++
>>  common/Makefile          |  1 +
>>  common/simple_timeout.c  | 66 ++++++++++++++++++++++++++++++++++++++++++++++++
>>  include/simple_timeout.h | 11 ++++++++
>>  6 files changed, 95 insertions(+), 49 deletions(-)
>>  create mode 100644 common/simple_timeout.c
>>  create mode 100644 include/simple_timeout.h
>>
>> diff --git a/commands/Kconfig b/commands/Kconfig
>> index 847ff76d1d8b..1c9083381fac 100644
>> --- a/commands/Kconfig
>> +++ b/commands/Kconfig
>> @@ -1487,6 +1487,7 @@ config CMD_READLINE
>>  config CMD_TIMEOUT
>>  	tristate
>>  	prompt "timeout"
>> +	select SIMPLE_TIMEOUT
> 
> Since the linker throws away unused functions anyway I think we don't
> need an option for this.
> 
>> +#include <clock.h>
>> +#include <command.h>
>> +#include <errno.h>
>> +#include <simple_timeout.h>
>> +#include <stdio.h>
>> +
>> +int is_simple_timeout(int timeout_s, unsigned flags, char *out_key)
> 
> I don't like the name very much since we already have a is_timeout
> function which does something completely different. Also is_xxx_timeout
> seems to imply that this function doesn't wait but only returns a
> status.
> 
> How about console_countdown() or similar?

What about the return value?

Return -EINTR + set out_key on interruption by user, return 0 otherwise?

Marc

-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
Industrial Linux Solutions        | Phone: +49-231-2826-924     |
Vertretung West/Dortmund          | Fax:   +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686  | http://www.pengutronix.de   |


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