Add mgos_sntp_get_last_synced_uptime()

Author: Kiril

include/mgos_sntp.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Returns 0 until synced. After that, returns uptime in seconds of the
+ * last sync event, as returned by `mgos_uptime()`.
+ */
+double mgos_sntp_get_last_synced_uptime(void);
+
+#ifdef __cplusplus
+}
+#endif

mos.yml

@@ -5,6 +5,8 @@ version: 1.0
 
 sources:
   - src
+includes:
+  - include
 filesystem:
   - fs
 config_schema:

src/mgos_sntp.c

@@ -15,6 +15,8 @@
  * limitations under the License.
  */
 
+#include "mgos_sntp.h"
+
 #include <stdbool.h>
 #include <stdlib.h>
 
@@ -30,7 +32,7 @@
 
 struct mgos_sntp_state {
   struct mg_connection *nc;
-  bool synced;
+  double last_synced_uptime;
   int retry_timeout_ms;
   mgos_timer_id retry_timer_id;
 };
@@ -61,7 +63,7 @@ static void mgos_sntp_ev(struct mg_connection *nc, int ev, void *ev_data,
         LOG(LL_ERROR, ("Failed to set time"));
       }
       s_state.retry_timeout_ms = 0;
-      s_state.synced = true;
+      s_state.last_synced_uptime = mgos_uptime();
       nc->flags |= MG_F_CLOSE_IMMEDIATELY;
       if (s_state.retry_timer_id != MGOS_INVALID_TIMER_ID) {
         mgos_clear_timer(s_state.retry_timer_id);
@@ -112,7 +114,7 @@ static void mgos_sntp_retry(void) {
   if (!mgos_sys_config_get_sntp_enable()) return;
   if (s_state.retry_timer_id != MGOS_INVALID_TIMER_ID) return;
   int rt_ms = 0;
-  if (s_state.synced) {
+  if (s_state.last_synced_uptime != 0) {
     rt_ms = mgos_sys_config_get_sntp_update_interval() * 1000;
     if (rt_ms == 0) return;
   } else {
@@ -151,6 +153,10 @@ static void mgos_sntp_net_ev(int ev, void *evd, void *arg) {
   (void) arg;
 }
 
+double mgos_sntp_get_last_synced_uptime(void) {
+  return s_state.last_synced_uptime;
+}
+
 bool mgos_sntp_init(void) {
   if (!mgos_sys_config_get_sntp_enable()) return true;
   if (mgos_sys_config_get_sntp_server() == NULL) {