param: comment what the lock is needed for

8 years ago · a4050db766
2 changed files with 2 additions and 2 deletions
--- a/src/modules/systemlib/param/param.c
+++ b/src/modules/systemlib/param/param.c
@ -157,7 +157,7 @@ static void param_set_used_internal(param_t param);
 static param_t param_find_internal(const char *name, bool notification);
-static px4_sem_t param_sem;
+static px4_sem_t param_sem; ///< this protects against concurrent access to param_values and param save
 /** lock the parameter store */
 static void
--- a/src/modules/systemlib/param/param_shmem.c
+++ b/src/modules/systemlib/param/param_shmem.c
@ -165,7 +165,7 @@ static void param_set_used_internal(param_t param);
 static param_t param_find_internal(const char *name, bool notification);
-static px4_sem_t param_sem;
+static px4_sem_t param_sem; ///< this protects against concurrent access to param_values and param save
 /** lock the parameter store */
 static void