[PATCH 1/2] Prepare for global only atexit handling

[Jeff Johnston]

Thanks Sebastian.  Patch applied.

-- Jeff J.

On 05/07/2013 04:42 PM, Sebastian Huber wrote:
> newlib/ChangeLog
> 2013-05-07  Sebastian Huber <sebastian.huber@embedded-brains.de>
>
> 	* libc/include/sys/reent.h (_ATEXIT_INIT): Define.
> 	(_ATEXIT_INIT_PTR): Likewise.
> 	(_REENT_INIT_ATEXIT): Likewise.
> 	(_REENT_INIT_ATEXIT_PTR): Likewise.
> 	(_GLOBAL_ATEXIT): Likewise.
> 	* libc/stdlib/__atexit.c (_GLOBAL_ATEXIT0): Define.
> 	(__register_exitproc): Use _GLOBAL_ATEXIT and _GLOBAL_ATEXIT0.
> 	* libc/stdlib/__call_atexit.c (__call_exitprocs): Likewise.
> ---
>   newlib/libc/include/sys/reent.h    |   32 +++++++++++++++++++++++---------
>   newlib/libc/stdlib/__atexit.c      |   10 ++++++----
>   newlib/libc/stdlib/__call_atexit.c |    4 ++--
>   3 files changed, 31 insertions(+), 15 deletions(-)
>
> diff --git a/newlib/libc/include/sys/reent.h b/newlib/libc/include/sys/reent.h
> index ff0242e..8b78f5b 100644
> --- a/newlib/libc/include/sys/reent.h
> +++ b/newlib/libc/include/sys/reent.h
> @@ -85,6 +85,12 @@ struct _atexit {
>   	void	(*_fns[_ATEXIT_SIZE])(void);	/* the table itself */
>           struct _on_exit_args * _on_exit_args_ptr;
>   };
> +# define _ATEXIT_INIT {_NULL, 0, {_NULL}, _NULL}
> +# define _ATEXIT_INIT_PTR(var) \
> +  (var)->_next = _NULL; \
> +  (var)->_ind = 0; \
> +  (var)->_fns[0] = _NULL; \
> +  (var)->_on_exit_args_ptr = _NULL
>   #else
>   struct _atexit {
>   	struct	_atexit *_next;			/* next in list */
> @@ -93,8 +99,20 @@ struct _atexit {
>   	void	(*_fns[_ATEXIT_SIZE])(void);	/* the table itself */
>           struct _on_exit_args _on_exit_args;
>   };
> +# define _ATEXIT_INIT {_NULL, 0, {_NULL}, {{_NULL}, {_NULL}, 0, 0}}
> +# define _ATEXIT_INIT_PTR(var) \
> +  (var)->_next = _NULL; \
> +  (var)->_ind = 0; \
> +  (var)->_fns[0] = _NULL; \
> +  (var)->_on_exit_args._fntypes = 0; \
> +  (var)->_on_exit_args._fnargs[0] = _NULL
>   #endif
>
> +#define _REENT_INIT_ATEXIT \
> +  _NULL, _ATEXIT_INIT,
> +#define _REENT_INIT_ATEXIT_PTR(var, var0) \
> +  (var)->_atexit = _NULL; _ATEXIT_INIT_PTR(var0);
> +
>   /*
>    * Stdio buffers.
>    *
> @@ -425,8 +443,7 @@ extern const struct __sFILE_fake __sf_fake_stderr;
>       _NULL, \
>       _NULL, \
>       _NULL, \
> -    _NULL, \
> -    {_NULL, 0, {_NULL}, _NULL}, \
> +    _REENT_INIT_ATEXIT \
>       {_NULL, 0, _NULL}, \
>       _NULL, \
>       _NULL, \
> @@ -452,11 +469,7 @@ extern const struct __sFILE_fake __sf_fake_stderr;
>       (var)->_localtime_buf = _NULL; \
>       (var)->_asctime_buf = _NULL; \
>       (var)->_sig_func = _NULL; \
> -    (var)->_atexit = _NULL; \
> -    (var)->_atexit0._next = _NULL; \
> -    (var)->_atexit0._ind = 0; \
> -    (var)->_atexit0._fns[0] = _NULL; \
> -    (var)->_atexit0._on_exit_args_ptr = _NULL; \
> +    _REENT_INIT_ATEXIT_PTR(var, &(var)->_atexit0) \
>       (var)->__sglue._next = _NULL; \
>       (var)->__sglue._niobs = 0; \
>       (var)->__sglue._iobs = _NULL; \
> @@ -698,8 +711,7 @@ struct _reent
>           {0, {0}} \
>         } \
>       }, \
> -    _NULL, \
> -    {_NULL, 0, {_NULL}, {{_NULL}, {_NULL}, 0, 0}}, \
> +    _REENT_INIT_ATEXIT \
>       _NULL, \
>       {_NULL, 0, _NULL} \
>     }
> @@ -791,6 +803,8 @@ void _reclaim_reent _PARAMS ((struct _reent *));
>
>   #define _GLOBAL_REENT _global_impure_ptr
>
> +#define _GLOBAL_ATEXIT (_GLOBAL_REENT->_atexit)
> +
>   #ifdef __cplusplus
>   }
>   #endif
> diff --git a/newlib/libc/stdlib/__atexit.c b/newlib/libc/stdlib/__atexit.c
> index 1caf2e5..a095313 100644
> --- a/newlib/libc/stdlib/__atexit.c
> +++ b/newlib/libc/stdlib/__atexit.c
> @@ -15,6 +15,8 @@ void * malloc(size_t) _ATTRIBUTE((__weak__));
>   extern _LOCK_RECURSIVE_T __atexit_lock;
>   #endif
>
> +#define _GLOBAL_ATEXIT0 (&_GLOBAL_REENT->_atexit0)
> +
>   /*
>    * Register a function to be performed at exit or on shared library unload.
>    */
> @@ -34,9 +36,9 @@ _DEFUN (__register_exitproc,
>     __lock_acquire_recursive(__atexit_lock);
>   #endif
>
> -  p = _GLOBAL_REENT->_atexit;
> +  p = _GLOBAL_ATEXIT;
>     if (p == NULL)
> -    _GLOBAL_REENT->_atexit = p = &_GLOBAL_REENT->_atexit0;
> +    _GLOBAL_ATEXIT = p = _GLOBAL_ATEXIT0;
>     if (p->_ind >= _ATEXIT_SIZE)
>       {
>   #ifndef _ATEXIT_DYNAMIC_ALLOC
> @@ -56,8 +58,8 @@ _DEFUN (__register_exitproc,
>   	  return -1;
>   	}
>         p->_ind = 0;
> -      p->_next = _GLOBAL_REENT->_atexit;
> -      _GLOBAL_REENT->_atexit = p;
> +      p->_next = _GLOBAL_ATEXIT;
> +      _GLOBAL_ATEXIT = p;
>   #ifndef _REENT_SMALL
>         p->_on_exit_args._fntypes = 0;
>         p->_on_exit_args._is_cxa = 0;
> diff --git a/newlib/libc/stdlib/__call_atexit.c b/newlib/libc/stdlib/__call_atexit.c
> index a21dd57..76d3f12 100644
> --- a/newlib/libc/stdlib/__call_atexit.c
> +++ b/newlib/libc/stdlib/__call_atexit.c
> @@ -76,8 +76,8 @@ _DEFUN (__call_exitprocs, (code, d),
>
>    restart:
>
> -  p = _GLOBAL_REENT->_atexit;
> -  lastp = &_GLOBAL_REENT->_atexit;
> +  p = _GLOBAL_ATEXIT;
> +  lastp = &_GLOBAL_ATEXIT;
>     while (p)
>       {
>   #ifdef _REENT_SMALL
>