mpegts service: add asserts to master/slave linking

tvheadend · Jan 22, 2016 · b756409 · b756409
1 parent 045f739
commit b756409
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Showing 2 changed files with 5 additions and 0 deletions.
diff --git a/src/input/mpegts/mpegts_service.c b/src/input/mpegts/mpegts_service.c
@@ -965,6 +965,8 @@ mpegts_service_link ( mpegts_service_t *master, mpegts_service_t *slave )
 {
   pthread_mutex_lock(&slave->s_stream_mutex);
   pthread_mutex_lock(&master->s_stream_mutex);
+  assert(LIST_SAFE_ENTRY(master, s_masters_link));
+  assert(LIST_SAFE_ENTRY(slave, s_slaves_link));
   LIST_INSERT_HEAD(&slave->s_masters, master, s_masters_link);
   LIST_INSERT_HEAD(&master->s_slaves, slave, s_slaves_link);
   pthread_mutex_unlock(&master->s_stream_mutex);

diff --git a/src/queue.h b/src/queue.h
@@ -36,6 +36,9 @@
                 LIST_ENTRY_INIT(elm, field); \
         }
 
+#define LIST_SAFE_ENTRY(elm, field) \
+        ((elm)->field.le_next == NULL && (elm)->field.le_prev == NULL)
+
 #define LIST_MOVE(newhead, oldhead, field) do {			        \
         if((oldhead)->lh_first) {					\
            (oldhead)->lh_first->field.le_prev = &(newhead)->lh_first;	\