Add a function 'void blc_loop_wait_stop();

' used to wait for the main thread of the blc_loop to stop. (used by coreaudio)

include/blc_command.h

@@ -126,6 +126,11 @@ void blc_command_loop_init(long loop_period);
 int blc_command_loop_start();
 void blc_command_loop_end();
 
+
+/** Wait that the loop_thread launched by 'blc_command_loop_init' listining on keyboard stops ( i.e. 'quitting has been requested ).*/
+void blc_loop_wait_stop();
+
+
 /** Stop a textual program
  * - Send a quitting message with the name of the app on stderr.
  * - Send 'q' and flush on stdout if it is a piped output

src/blc_loop.cpp

@@ -36,7 +36,6 @@ static struct timeval step_timer, profile_timer;
 
 static sem_t *blocking_semaphore=NULL;
 
-
 type_blc_status blc_status=BLC_RUN;
 
 void blc_fprint_stats(FILE *file){
@@ -291,3 +290,8 @@ void blc_command_loop_end(){
     intermediate_iteration++;
     blc_loop_iteration++;
 }
+
+
+void blc_loop_wait_stop(){
+    pthread_join(loop_thread, nullptr);
+}