add run_loop_get_time_ms() and implement in embedded, posix, and cocoa run loops

include/btstack/run_loop.h

@@ -99,6 +99,12 @@ void run_loop_set_timer_handler(timer_source_t *ts, void (*process)(timer_source
 void run_loop_add_timer(timer_source_t *timer); 
 int  run_loop_remove_timer(timer_source_t *timer);
 
+/**
+ * @brief Get current time in ms
+ * @note 32-bit ms counter will overflow after approx. 52 days
+ */
+uint32_t run_loop_get_time_ms(void);
+
 /**
  * @brief Init must be called before any other run_loop call. Use RUN_LOOP_EMBEDDED for embedded devices.
  */
@@ -120,6 +126,7 @@ int  run_loop_remove_data_source(data_source_t *dataSource);
  */
 void run_loop_execute(void);
 
+
 // hack to fix HCI timer handling
 #ifdef HAVE_TICK
 /**

platforms/cocoa/run_loop_cocoa.m

@@ -52,6 +52,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+static struct timeval init_tv;
+
 static void theCFRunLoopTimerCallBack (CFRunLoopTimerRef timer,void *info){
     timer_source_t * ts = (timer_source_t*)info;
     ts->process(ts);
@@ -149,7 +151,18 @@ static void cocoa_set_timer(timer_source_t *a, uint32_t timeout_in_ms){
     }
 }
 
+/**
+ * @brief Queries the current time in ms since start
+ */
+static uint32_t cocoa_get_time_ms(void){
+    struct timeval current_tv;
+    gettimeofday(&current_tv, NULL);
+    return (current_tv.tv_sec  - init_tv.tv_sec)  * 1000
+         + (current_tv.tv_usec - init_tv.tv_usec) / 1000;
+}
+
 void cocoa_init(void){
+    gettimeofday(&init_tv, NULL);
 }
 
 void cocoa_execute(void)
@@ -171,5 +184,6 @@ run_loop_t run_loop_cocoa = {
     &cocoa_remove_timer,
     &cocoa_execute,
     &cocoa_dump_timer,
+    &cocoa_get_time_ms,
 };
 

platforms/posix/src/run_loop_posix.c

@@ -272,4 +272,5 @@ run_loop_t run_loop_posix = {
     &posix_remove_timer,
     &posix_execute,
     &posix_dump_timer,
+    &posix_get_time_ms,
 };

src/run_loop.c

@@ -120,6 +120,15 @@ int run_loop_remove_timer(timer_source_t *ts){
     return the_run_loop->remove_timer(ts);
 }
 
+/**
+ * @brief Get current time in ms
+ */
+uint32_t run_loop_get_time_ms(void){
+    run_loop_assert();
+    return the_run_loop->get_time_ms();
+}
+
+
 void run_loop_timer_dump(void){
     run_loop_assert();
     the_run_loop->dump_timer();

src/run_loop_embedded.c

@@ -268,4 +268,5 @@ const run_loop_t run_loop_embedded = {
     &embedded_remove_timer,
     &embedded_execute,
     &embedded_dump_timer,
+    &embedded_get_time_ms,
 };

src/run_loop_private.h

@@ -67,6 +67,7 @@ typedef struct {
 	int  (*remove_timer)(timer_source_t *timer); 
 	void (*execute)(void);
 	void (*dump_timer)(void);
+	uint32_t (*get_time_ms)(void);
 } run_loop_t;
 
 #if defined __cplusplus