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subsys/settings: add a function to save subtree

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When running multiple subsystems or applications on a MCU, the usual
strategy is to use different settings subtrees.

The API provides a way to load or commit a subtree, to avoid adding
dependencies between subsystems or applications, but lacks the way to
save a subtree only. Fix that by adding a settings_save_subtree()
function.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2024-04-29 22:25:36 +02:00 committed by Fabio Baltieri
parent 37c23f69f2
commit e94fe44805
2 changed files with 21 additions and 0 deletions
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10
include/zephyr/settings/settings.h
View file

@ -303,6 +303,16 @@ int settings_load_subtree_direct(
*/
int settings_save(void);
/**
* Save limited set of currently running serialized items. All serialized items
* that belong to subtree and which are different from currently persisted
* values will be saved.
*
* @param[in] subtree name of the subtree to be loaded.
* @return 0 on success, non-zero on failure.
*/
int settings_save_subtree(const char *subtree);
/**
* Write a single serialized value to persisted storage (if it has
* changed value).

11
subsys/settings/src/settings_store.c
View file

@ -116,6 +116,11 @@ int settings_delete(const char *name)
}
int settings_save(void)
{
return settings_save_subtree(NULL);
}
int settings_save_subtree(const char *subtree)
{
struct settings_store *cs;
int rc;
@ -132,6 +137,9 @@ int settings_save(void)
rc = 0;
STRUCT_SECTION_FOREACH(settings_handler_static, ch) {
if (subtree && !settings_name_steq(ch->name, subtree, NULL)) {
continue;
}
if (ch->h_export) {
rc2 = ch->h_export(settings_save_one);
if (!rc) {
@ -143,6 +151,9 @@ int settings_save(void)
#if defined(CONFIG_SETTINGS_DYNAMIC_HANDLERS)
struct settings_handler *ch;
SYS_SLIST_FOR_EACH_CONTAINER(&settings_handlers, ch, node) {
if (subtree && !settings_name_steq(ch->name, subtree, NULL)) {
continue;
}
if (ch->h_export) {
rc2 = ch->h_export(settings_save_one);
if (!rc) {