Make it possible to use the list in signal-handlers.

[gnulib.git] / lib / alloca_.h

diff --git a/lib/alloca_.h b/lib/alloca_.h
index b834871..dd0b3e9 100644 (file)
--- a/lib/alloca_.h
+++ b/lib/alloca_.h
@@ -1,30 +1,30 @@
 /* Memory allocation on the stack.
-   Copyright (C) 1995, 1999, 2001-2003 Free Software Foundation, Inc.
+
+   Copyright (C) 1995, 1999, 2001, 2002, 2003, 2004, 2006 Free Software
+   Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify it
-   under the terms of the GNU Library General Public License as published
+   under the terms of the GNU General Public License as published
    by the Free Software Foundation; either version 2, 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
-   Library General Public License for more details.
+   General Public License for more details.
 
-   You should have received a copy of the GNU Library General Public
+   You should have received a copy of the GNU General Public
    License along with this program; if not, write to the Free Software
-   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
    USA.  */
 
-/* When this file is included, it may be preceded only by preprocessor
-   declarations.  Thanks to AIX.  Therefore we include it right after
-   "config.h", not later.  */
-
-#ifndef _ALLOCA_H
-#define _ALLOCA_H
+/* Avoid using the symbol _ALLOCA_H here, as Bison assumes _ALLOCA_H
+   means there is a real alloca function.  */
+#ifndef _GNULIB_ALLOCA_H
+# define _GNULIB_ALLOCA_H
 
-/* alloca(N) returns a pointer (void* or char*) to N bytes of memory
-   allocated on the stack, and which will last until the function returns.
+/* alloca (N) returns a pointer to N bytes of memory
+   allocated on the stack, which will last until the function returns.
    Use of alloca should be avoided:
      - inside arguments of function calls - undefined behaviour,
      - in inline functions - the allocation may actually last until the
@@ -34,35 +34,21 @@
        request, the program just crashes.
  */
 
-#ifdef __GNUC__
-# ifndef alloca
+#ifndef alloca
+# ifdef __GNUC__
 #  define alloca __builtin_alloca
-# endif
-#else
-# ifdef _MSC_VER
+# elif defined _AIX
+#  define alloca __alloca
+# elif defined _MSC_VER
 #  include <malloc.h>
 #  define alloca _alloca
 # else
-#  if HAVE_ALLOCA_H
-#   include <alloca.h>
-#  else
-#   ifdef _AIX
- #pragma alloca
-#   else
-#    ifdef __hpux /* This section must match that of bison generated files. */
-#     ifdef __cplusplus
-extern "C" void *alloca (unsigned int);
-#     else /* not __cplusplus */
-extern void *alloca ();
-#     endif /* not __cplusplus */
-#    else /* not __hpux */
-#     ifndef alloca
-extern char *alloca ();
-#     endif
-#    endif /* __hpux */
-#   endif
+#  include <stddef.h>
+#  ifdef  __cplusplus
+extern "C"
 #  endif
+void *alloca (size_t);
 # endif
 #endif
 
-#endif /* _ALLOCA_H */
+#endif /* _GNULIB_ALLOCA_H */