FreeRTOS: btstack_run_loop_freertos_trigger_exit allows to request run loop exit

CHANGELOG.md

@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - example/le_mitm: MITM implementation that forwards ATT PDUs and allows for pairing
 - GAP: gap_set_security_level sets required security level for incoming and outgoing connections
 - cc256x: allow to specify power vector for each modulation type
+- FreeRTOS: btstack_run_loop_freertos_trigger_exit allows to request run loop exit
 
 ### Changed
 - L2CAP ERTM: send extended features request only once per HCI connection

platform/freertos/btstack_run_loop_freertos.c

@@ -105,6 +105,7 @@ static EventGroupHandle_t   btstack_run_loop_event_group;
 // the run loop
 static btstack_linked_list_t timers;
 static btstack_linked_list_t data_sources;
+static bool run_loop_exit_requested;
 
 static uint32_t btstack_run_loop_freertos_get_time_ms(void){
     return hal_time_ms();
@@ -207,12 +208,18 @@ void btstack_run_loop_freertos_execute_code_on_main_thread_from_isr(void (*fn)(v
 }
 #endif
 
+void btstack_run_loop_freertos_trigger_exit(void){
+    run_loop_exit_requested = true;
+}
+
 /**
  * Execute run_loop
  */
 static void btstack_run_loop_freertos_execute(void) {
     log_debug("RL: execute");
     
+    run_loop_exit_requested = false;
+
     while (true) {
 
         // process data sources
@@ -253,6 +260,9 @@ static void btstack_run_loop_freertos_execute(void) {
             ts->process(ts);
         }
 
+        // exit triggered by btstack_run_loop_freertos_trigger_exit (from data source, timer, run on main thread)
+        if (run_loop_exit_requested) break;
+
         // wait for timeout or event group/task notification
         log_debug("RL: wait with timeout %u", (int) timeout_ms);
 #ifdef HAVE_FREERTOS_TASK_NOTIFICATIONS

platform/freertos/btstack_run_loop_freertos.h

@@ -76,7 +76,12 @@ void btstack_run_loop_freertos_trigger(void);
  * @brief Triggers processing of data sources from an ISR.
  * Has to be called after enabling a poll data source to wake-pup run loop.
  */
-void btstack_run_loop_freertos_trigger_from_isr(void);    
+void btstack_run_loop_freertos_trigger_from_isr(void);
+
+/**
+ * @brief Triggers exit of run loop from BTstack main thread, causes call to btstack_run_loop_execute to return
+ */
+void btstack_run_loop_freertos_trigger_exit(void);
 
 /* API_END */