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shell: Improve handling of log messages

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If burst of log messages was passed to the shell log
backend, it was likely that messages were lost because
shell had no means to control arrivals of log messages.

Added log message enqueueing timeout to the shell instance
to allow blocking logger thread if short-term arrival rate
exceeded shell capabilities.

Added kconfig option for setting log message queue size
and timeout in RTT and UART instances. Added section in
shell documentation which explains interaction between
the logger and shell instance acting as a logger backend.

Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
This commit is contained in:
Krzysztof Chruscinski 2018-12-17 10:43:58 +01:00 • committed by Carles Cufí
commit 08f0d93cbb
10 changed files with 87 additions and 20 deletions
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17
include/shell/shell.h
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@ -452,18 +452,23 @@ extern void shell_print_stream(const void *user_ctx, const char *data,
*
* @param[in] _name Instance name.
* @param[in] _prompt Shell prompt string.
* @param[in] transport_iface Pointer to the transport interface.
* @param[in] log_queue_size Logger processing queue size.
* @param[in] _transport_iface Pointer to the transport interface.
* @param[in] _log_queue_size Logger processing queue size.
* @param[in] _log_timeout Logger thread timeout in milliseconds on full
* log queue. If queue is full logger thread is
* blocked for given amount of time before log
* message is dropped.
* @param[in] _shell_flag Shell output newline sequence.
*/
#define SHELL_DEFINE(_name, _prompt, transport_iface, \
log_queue_size, _shell_flag) \
#define SHELL_DEFINE(_name, _prompt, _transport_iface, \
_log_queue_size, _log_timeout, _shell_flag) \
static const struct shell _name; \
static struct shell_ctx UTIL_CAT(_name, _ctx); \
static char _name##prompt[CONFIG_SHELL_PROMPT_LENGTH + 1] = _prompt; \
static u8_t _name##_out_buffer[CONFIG_SHELL_PRINTF_BUFF_SIZE]; \
SHELL_LOG_BACKEND_DEFINE(_name, _name##_out_buffer, \
CONFIG_SHELL_PRINTF_BUFF_SIZE); \
CONFIG_SHELL_PRINTF_BUFF_SIZE, \
_log_queue_size, _log_timeout); \
SHELL_HISTORY_DEFINE(_name, 128, 8);/*todo*/ \
SHELL_FPRINTF_DEFINE(_name##_fprintf, &_name, _name##_out_buffer, \
CONFIG_SHELL_PRINTF_BUFF_SIZE, \
@ -474,7 +479,7 @@ extern void shell_print_stream(const void *user_ctx, const char *data,
static struct k_thread _name##_thread; \
static const struct shell _name = { \
.prompt = _name##prompt, \
.iface = transport_iface, \
.iface = _transport_iface, \
.ctx = &UTIL_CAT(_name, _ctx), \
.history = SHELL_HISTORY_PTR(_name), \
.shell_flag = _shell_flag, \