Update.

1999-12-17  Andreas Jaeger  <aj@suse.de>

	* stdlib/Versions: Export __cxa_atexit and __cxa_finalize.

1999-12-16  Mark Mitchell  <mark@codesourcery.com>

	* stdlib/Makefile (routines): Add cxa_atexit and cxa_finalize.
	* stdlib/exit.h (flavor): Add ef_cxa.
	(exit_function): Add cxa variant.
	* stdlib/exit.c (exit): Handle ef_cxa exit functions.
	* stdlib/cxa_atexit.c: New file.
	* stdlib/cxa_finalize.c: New file.

6 files changed, 110 insertions, 3 deletions

diff --git a/stdlib/Makefile b/stdlib/Makefile
index ee7039f8c2..29adea4425 100644
--- a/stdlib/Makefile
+++ b/stdlib/Makefile
@@ -29,7 +29,7 @@ routines	:=							      \
 	abort								      \
 	bsearch qsort msort						      \
 	getenv putenv setenv secure-getenv				      \
-	exit on_exit atexit						      \
+	exit on_exit atexit cxa_atexit cxa_finalize			      \
 	abs labs llabs							      \
 	div ldiv lldiv							      \
 	mblen mbstowcs mbtowc wcstombs wctomb				      \
diff --git a/stdlib/Versions b/stdlib/Versions
index 9536e3240e..034125a200 100644
--- a/stdlib/Versions
+++ b/stdlib/Versions
@@ -90,4 +90,8 @@ libc {
     # i*
     imaxabs; imaxdiv;
   }
+  GLIBC_2.1.3 {
+    # used by new G++ ABI
+    __cxa_atexit; __cxa_finalize;
+  }
 }
diff --git a/stdlib/cxa_atexit.c b/stdlib/cxa_atexit.c
new file mode 100644
index 0000000000..180d74a54d
--- /dev/null
+++ b/stdlib/cxa_atexit.c
@@ -0,0 +1,38 @@
+/* Copyright (C) 1999 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <stdlib.h>
+#include "exit.h"
+
+/* Register a function to be called by exit or when a shared library
+   is unloaded.  This function is only called from code generated by
+   the C++ compiler.  */
+int
+__cxa_atexit (void (*func) (void *), void *arg, void *d)
+{
+  struct exit_function *new = __new_exitfn ();
+
+  if (new == NULL)
+    return -1;
+
+  new->flavor = ef_cxa;
+  new->func.cxa.fn = func;
+  new->func.cxa.arg = arg;
+  new->func.cxa.dso_handle = d;
+  return 0;
+}
diff --git a/stdlib/cxa_finalize.c b/stdlib/cxa_finalize.c
new file mode 100644
index 0000000000..da2d91512e
--- /dev/null
+++ b/stdlib/cxa_finalize.c
@@ -0,0 +1,44 @@
+/* Copyright (C) 1999 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <atomicity.h>
+#include "exit.h"
+
+/* If D is non-NULL, call all functions registered with `__cxa_atexit'
+   with the same dso handle.  Otherwise, if D is NULL, do nothing.  */
+void
+__cxa_finalize (void *d)
+{
+  struct exit_function_list *funcs;
+
+  if (!d)
+    return;
+
+  for (funcs = __exit_funcs; funcs; funcs = funcs->next)
+    {
+      struct exit_function *f;
+
+      for (f = &funcs->fns[funcs->idx - 1]; f >= &funcs->fns[0]; --f)
+	if (d == f->func.cxa.dso_handle
+	    /* We don't want to run this cleanup more than once.  */
+	    && compare_and_swap (&f->flavor, ef_cxa, ef_free))
+	  (*f->func.cxa.fn) (f->func.cxa.arg);
+    }
+}
diff --git a/stdlib/exit.c b/stdlib/exit.c
index f63dc1fdec..904c225336 100644
--- a/stdlib/exit.c
+++ b/stdlib/exit.c
@@ -56,6 +56,9 @@ exit (int status)
 	    case ef_at:
 	      (*f->func.at) ();
 	      break;
+	    case ef_cxa:
+	      (*f->func.cxa.fn) (f->func.cxa.arg);
+	      break;
 	    }
 	}
 
diff --git a/stdlib/exit.h b/stdlib/exit.h
index dcaa85a442..9b6c1c3d4e 100644
--- a/stdlib/exit.h
+++ b/stdlib/exit.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 1996, 1997 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 1996, 1997, 1999 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
@@ -19,9 +19,21 @@
 #ifndef	_EXIT_H
 #define _EXIT_H 1
 
+
+enum
+{
+  ef_free,	/* `ef_free' MUST be zero!  */
+  ef_us,
+  ef_on,
+  ef_at,
+  ef_cxa
+};
+
 struct exit_function
   {
-    enum { ef_free, ef_us, ef_on, ef_at } flavor; /* `ef_free' MUST be zero! */
+    /* `flavour' should be of type of the `enum' above but since we need
+       this element in an atomic operation we have to use `long int'.  */
+    long int flavor;
     union
       {
 	void (*at) (void);
@@ -30,6 +42,12 @@ struct exit_function
 	    void (*fn) (int status, void *arg);
 	    void *arg;
 	  } on;
+	struct
+	  {
+	    void (*fn) (void *arg);
+	    void *arg;
+	    void *dso_handle;
+	  } cxa;
       } func;
   };
 struct exit_function_list