1 files changed, 70 insertions, 0 deletions
diff --git a/REORG.TODO/include/set-hooks.h b/REORG.TODO/include/set-hooks.h
new file mode 100644
index 0000000000..4a711e1fbd
--- /dev/null
+++ b/REORG.TODO/include/set-hooks.h
@@ -0,0 +1,70 @@
+/* Macros for using symbol sets for running lists of functions.
+   Copyright (C) 1994-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _SET_HOOKS_H
+#define _SET_HOOKS_H 1
+
+#define __need_size_t
+#include <stddef.h>
+#include <sys/cdefs.h>
+
+#ifdef symbol_set_define
+/* Define a hook variable called NAME.  Functions put on this hook take
+   arguments described by PROTO.  Use `text_set_element (NAME, FUNCTION)'
+   from gnu-stabs.h to add a function to the hook.  */
+
+# define DEFINE_HOOK(NAME, PROTO)		\
+  typedef void __##NAME##_hook_function_t PROTO; \
+  symbol_set_define (NAME)
+
+# define DECLARE_HOOK(NAME, PROTO)		\
+  typedef void __##NAME##_hook_function_t PROTO;\
+  symbol_set_declare (NAME)
+
+/* Run all the functions hooked on the set called NAME.
+   Each function is called like this: `function ARGS'.  */
+
+# define RUN_HOOK(NAME, ARGS)						      \
+do {									      \
+  void *const *ptr;						      \
+  for (ptr = (void *const *) symbol_set_first_element (NAME);		      \
+       ! symbol_set_end_p (NAME, ptr); ++ptr)				      \
+    (*(__##NAME##_hook_function_t *) *ptr) ARGS;			      \
+} while (0)
+
+/* Define a hook variable with NAME and PROTO, and a function called RUNNER
+   which calls each function on the hook in turn, with ARGS.  */
+
+# define DEFINE_HOOK_RUNNER(name, runner, proto, args) \
+DEFINE_HOOK (name, proto); \
+extern void runner proto; void runner proto { RUN_HOOK (name, args); }
+
+#else
+
+/* The system does not provide necessary support for this.  */
+# define DEFINE_HOOK(NAME, PROTO)
+
+# define DECLARE_HOOK(NAME, PROTO)
+
+# define RUN_HOOK(NAME, ARGS)
+
+# define DEFINE_HOOK_RUNNER(name, runner, proto, args)
+
+#endif
+
+#endif /* set-hooks.h */