[PATCH] Pthreads cleanup push/pop changes

[Sebastian Huber]

Hello,

how do want to continue with this patch?

1. Apply it as is.

2. Move "libc/include/pthread.h" to "newlib/libc/sys/rtems/include/pthread.h" 
first.

3. Guard the changes with __rtems__.

On 2013-07-08 11:14, Sebastian Huber wrote:
> Implementation according to POSIX:
>
> http://pubs.opengroup.org/onlinepubs/009695399/functions/pthread_cleanup_push.html
>
> This change is not conditional to RTEMS since I don't think the previous
> approach is useful at all.  To provide binary compatibility systems can
> still provide the previous pthread_cleanup_push() and pthread_cleanup_pop()
> functions.
>
> newlib/ChangeLog
> 2013-07-08  Sebastian Huber <sebastian.huber@embedded-brains.de>
>
> 	* libc/include/pthread.h (pthread_cleanup_push): Delete prototype
> 	and add macro of the same name.
> 	(pthread_cleanup_pop): Likewise.
> 	(_pthread_cleanup_context): Define.
> 	(_pthread_cleanup_push): Likewise.
> 	(_pthread_cleanup_pop): Likewise.
> 	(pthread_cleanup_push_defer_np): Define if _GNU_SOURCE is defined.
> 	(pthread_cleanup_pop_restore_np): Likewise.
> 	(_pthread_cleanup_push_defer): Likewise.
> 	(_pthread_cleanup_pop_restore): Likewise.
> ---
>   newlib/libc/include/pthread.h |   47 ++++++++++++++++++++++++++++++++++++++--
>   1 files changed, 44 insertions(+), 3 deletions(-)
>
> diff --git a/newlib/libc/include/pthread.h b/newlib/libc/include/pthread.h
> index ff7f354..9641114 100644
> --- a/newlib/libc/include/pthread.h
> +++ b/newlib/libc/include/pthread.h
> @@ -33,6 +33,13 @@ extern "C" {
>   #include <time.h>
>   #include <sys/sched.h>
>
> +struct _pthread_cleanup_context {
> +  void (*_routine)(void *);
> +  void *_arg;
> +  int _canceltype;
> +  struct _pthread_cleanup_context *_previous;
> +};
> +
>   /* Register Fork Handlers */
>   int	_EXFUN(pthread_atfork,(void (*prepare)(void), void (*parent)(void),
>                      void (*child)(void)));
> @@ -280,9 +287,43 @@ void 	_EXFUN(pthread_testcancel, (void));
>
>   /* Establishing Cancellation Handlers, P1003.1c/Draft 10, p. 184 */
>
> -void 	_EXFUN(pthread_cleanup_push,
> -	(void (*__routine)( void * ), void *__arg));
> -void 	_EXFUN(pthread_cleanup_pop, (int __execute));
> +void	_EXFUN(_pthread_cleanup_push,
> +	(struct _pthread_cleanup_context *_context,
> +	void (*_routine)(void *), void *_arg));
> +
> +void	_EXFUN(_pthread_cleanup_pop,
> +	(struct _pthread_cleanup_context *_context,
> +	int _execute));
> +
> +/* It is intentional to open and close the scope in two different macros */
> +#define pthread_cleanup_push(_routine, _arg) \
> +  do { \
> +    struct _pthread_cleanup_context _pthread_clup_ctx; \
> +    _pthread_cleanup_push(&_pthread_clup_ctx, (_routine), (_arg))
> +
> +#define pthread_cleanup_pop(_execute) \
> +    _pthread_cleanup_pop(&_pthread_clup_ctx, (_execute)); \
> +  } while (0)
> +
> +#if defined(_GNU_SOURCE)
> +void	_EXFUN(_pthread_cleanup_push_defer,
> +	(struct _pthread_cleanup_context *_context,
> +	void (*_routine)(void *), void *_arg));
> +
> +void	_EXFUN(_pthread_cleanup_pop_restore,
> +	(struct _pthread_cleanup_context *_context,
> +	int _execute));
> +
> +/* It is intentional to open and close the scope in two different macros */
> +#define pthread_cleanup_push_defer_np(_routine, _arg) \
> +  do { \
> +    struct _pthread_cleanup_context _pthread_clup_ctx; \
> +    _pthread_cleanup_push_defer(&_pthread_clup_ctx, (_routine), (_arg))
> +
> +#define pthread_cleanup_pop_restore_np(_execute) \
> +    _pthread_cleanup_pop_restore(&_pthread_clup_ctx, (_execute)); \
> +  } while (0)
> +#endif /* defined(_GNU_SOURCE) */
>
>   #if defined(_POSIX_THREAD_CPUTIME)
>
>


-- 
Sebastian Huber, embedded brains GmbH

Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone   : +49 89 189 47 41-16
Fax     : +49 89 189 47 41-09
E-Mail  : sebastian.huber@embedded-brains.de
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