* cleanups.h: New file.

* cleanups.c: New file.
	* Makefile.in (SFILES): Add cleanups.c.
	(HFILES_NO_SRCDIR): Add cleanups.h.
	(COMMON_OBS): Add cleanups.o.
	* defs.h (struct cleanup): Moved to cleanups.h.
	(do_cleanups,do_final_cleanups): Ditto.
	(discard_cleanups,discard_final_cleanups): Ditto
	(make_cleanup,make_cleanup_dtor,make_final_cleanup): Ditto.
	(save_cleanups,save_final_cleanups): Ditto.
	(restore_cleanups,restore_final_cleanups): Ditto.
	(null_cleanup): Ditto.
	(make_my_cleanup,make_my_cleanup2): Ditto.
	(discard_my_cleanups,save_my_cleanups,restore_my_cleanups): Ditto.
	* utils.c (cleanup_chain,final_cleanup_chain): Moved to cleanups.c.
	(do_cleanups,do_final_cleanups): Ditto.
	(discard_cleanups,discard_final_cleanups): Ditto
	(make_cleanup,make_cleanup_dtor,make_final_cleanup): Ditto.
	(save_cleanups,save_final_cleanups): Ditto.
	(restore_cleanups,restore_final_cleanups): Ditto.
	(null_cleanup): Ditto.
	(make_my_cleanup,make_my_cleanup2): Ditto.
	(discard_my_cleanups,save_my_cleanups,restore_my_cleanups): Ditto.

gdb/cleanups.h

@@ -0,0 +1,94 @@
+/* Cleanups.
+   Copyright (C) 1986, 1988-2005, 2007-2012 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef CLEANUPS_H
+#define CLEANUPS_H
+
+/* The cleanup list records things that have to be undone
+   if an error happens (descriptors to be closed, memory to be freed, etc.)
+   Each link in the chain records a function to call and an
+   argument to give it.
+
+   Use make_cleanup to add an element to the cleanup chain.
+   Use do_cleanups to do all cleanup actions back to a given
+   point in the chain.  Use discard_cleanups to remove cleanups
+   from the chain back to a given point, not doing them.
+
+   If the argument is pointer to allocated memory, then you need
+   to additionally set the 'free_arg' member to a function that will
+   free that memory.  This function will be called both when the cleanup
+   is executed and when it's discarded.  */
+
+struct cleanup
+  {
+    struct cleanup *next;
+    void (*function) (void *);
+    void (*free_arg) (void *);
+    void *arg;
+  };
+
+/* NOTE: cagney/2000-03-04: This typedef is strictly for the
+   make_cleanup function declarations below.  Do not use this typedef
+   as a cast when passing functions into the make_cleanup() code.
+   Instead either use a bounce function or add a wrapper function.
+   Calling a f(char*) function with f(void*) is non-portable.  */
+typedef void (make_cleanup_ftype) (void *);
+
+/* WARNING: The result of the "make cleanup" routines is not the intuitive
+   choice of being a handle on the just-created cleanup.  Instead it is an
+   opaque handle of the cleanup mechanism and represents all cleanups created
+   from that point onwards.  */
+
+extern struct cleanup *make_cleanup (make_cleanup_ftype *, void *);
+
+extern struct cleanup *make_cleanup_dtor (make_cleanup_ftype *, void *,
+					  void (*dtor) (void *));
+
+extern struct cleanup *make_final_cleanup (make_cleanup_ftype *, void *);
+
+extern struct cleanup *make_my_cleanup (struct cleanup **,
+					make_cleanup_ftype *, void *);
+extern struct cleanup *make_my_cleanup2 (struct cleanup **,
+					 make_cleanup_ftype *, void *,
+					 void (*free_arg) (void *));
+
+/* A special value to pass to do_cleanups and do_final_cleanups
+   to tell them to do all cleanups.  */
+#define	ALL_CLEANUPS	((struct cleanup *)0)
+
+extern void do_cleanups (struct cleanup *);
+extern void do_final_cleanups (struct cleanup *);
+
+extern void discard_cleanups (struct cleanup *);
+extern void discard_final_cleanups (struct cleanup *);
+extern void discard_my_cleanups (struct cleanup **, struct cleanup *);
+
+extern struct cleanup *save_cleanups (void);
+extern struct cleanup *save_final_cleanups (void);
+extern struct cleanup *save_my_cleanups (struct cleanup **);
+
+extern void restore_cleanups (struct cleanup *);
+extern void restore_final_cleanups (struct cleanup *);
+extern void restore_my_cleanups (struct cleanup **, struct cleanup *);
+
+/* A no-op cleanup.
+   This is useful when you want to establish a known reference point
+   to pass to do_cleanups.  */
+extern void null_cleanup (void *);
+
+#endif /* CLEANUPS_H */