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shell: Add dropping of expired messages

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Log message get timestamp when being added to shell log message queue.
When adding to log message queue timeouts then all messages added
before timeout are dropped.

Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
This commit is contained in:
Krzysztof Chruscinski 2018-12-18 14:48:56 +01:00 • committed by Carles Cufí
commit b467de5849
2 changed files with 39 additions and 16 deletions
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47
subsys/shell/shell_log_backend.c
View file

@ -26,12 +26,12 @@ void shell_log_backend_enable(const struct shell_log_backend *backend,
static struct log_msg *msg_from_fifo(const struct shell_log_backend *backend)
{
struct log_msg *msg;
struct shell_log_backend_msg msg;
int err;
err = k_msgq_get(backend->msgq, &msg, K_NO_WAIT);
return (err == 0) ? msg : NULL;
return (err == 0) ? msg.msg : NULL;
}
static void fifo_flush(const struct shell_log_backend *backend)
@ -44,12 +44,40 @@ static void fifo_flush(const struct shell_log_backend *backend)
}
}
static void flush_expired_messages(const struct shell *shell)
{
int err;
struct shell_log_backend_msg msg;
struct k_msgq *msgq = shell->log_backend->msgq;
u32_t timeout = shell->log_backend->timeout;
u32_t now = k_uptime_get_32();
while (1) {
err = k_msgq_peek(msgq, &msg);
if (err == 0 && ((now - msg.timestamp) > timeout)) {
(void)k_msgq_get(msgq, &msg, K_NO_WAIT);
log_msg_put(msg.msg);
if (IS_ENABLED(CONFIG_SHELL_STATS)) {
shell->stats->log_lost_cnt++;
}
} else {
break;
}
}
}
static void msg_to_fifo(const struct shell *shell,
struct log_msg *msg)
{
int err;
struct shell_log_backend_msg t_msg = {
.msg = msg,
.timestamp = k_uptime_get_32()
};
err = k_msgq_put(shell->log_backend->msgq, &msg,
err = k_msgq_put(shell->log_backend->msgq, &t_msg,
shell->log_backend->timeout);
switch (err) {
@ -58,18 +86,7 @@ static void msg_to_fifo(const struct shell *shell,
case -EAGAIN:
case -ENOMSG:
{
struct log_msg *old_msg;
/* drop one message */
old_msg = msg_from_fifo(shell->log_backend);
if (old_msg) {
log_msg_put(old_msg);
if (IS_ENABLED(CONFIG_SHELL_STATS)) {
shell->stats->log_lost_cnt++;
}
}
flush_expired_messages(shell);
err = k_msgq_put(shell->log_backend->msgq, &msg, K_NO_WAIT);
if (err) {