Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

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 */