ensure that mutex locks inside list heads are initialized properly on platforms that require constructor initialization (issue #8029, patch from timrobbins)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@44631 65c4cc65-6c06-0410-ace0-fbb531ad65f3

include/asterisk/linkedlists.h

@@ -145,12 +145,30 @@ struct name {								\
   This would define \c struct \c entry_list, intended to hold a list of
   type \c struct \c entry.
 */
+#if defined(AST_MUTEX_INIT_W_CONSTRUCTORS)
+#define AST_LIST_HEAD_STATIC(name, type)				\
+struct name {								\
+	struct type *first;						\
+	struct type *last;						\
+	ast_mutex_t lock;						\
+} name;									\
+static void  __attribute__ ((constructor)) init_##name(void)		\
+{									\
+        AST_LIST_HEAD_INIT(&name);					\
+}									\
+static void  __attribute__ ((destructor)) fini_##name(void)		\
+{									\
+        AST_LIST_HEAD_DESTROY(&name);					\
+}									\
+struct __dummy_##name
+#else
 #define AST_LIST_HEAD_STATIC(name, type)				\
 struct name {								\
 	struct type *first;						\
 	struct type *last;						\
 	ast_mutex_t lock;						\
 } name = AST_LIST_HEAD_INIT_VALUE
+#endif
 
 /*!
   \brief Defines a structure to be used to hold a list of specified type, statically initialized.