[PATCH] Add and use _STDIO_CLOSE_PER_REENT_STD_STREAMS

[Joel Sherrill]

This looks OK to me.

Corinna.. ok to commit?

On 4/25/2013 3:13 AM, Sebastian Huber wrote:
> newlib/ChangeLog
> 2013-04-25  Sebastian Huber <sebastian.huber@embedded-brains.de>
>
> 	* libc/stdio/local.h (_STDIO_CLOSE_PER_REENT_STD_STREAMS): New
> 	define.
> 	* libc/stdio/findfp.c (_STDIO_CLOSE_PER_REENT_STD_STREAMS): Use
> 	define.
> ---
>   newlib/libc/stdio/findfp.c |    4 ++++
>   newlib/libc/stdio/local.h  |   10 ++++++++++
>   2 files changed, 14 insertions(+), 0 deletions(-)
>
> diff --git a/newlib/libc/stdio/findfp.c b/newlib/libc/stdio/findfp.c
> index 7ab3bdb..e40500a 100644
> --- a/newlib/libc/stdio/findfp.c
> +++ b/newlib/libc/stdio/findfp.c
> @@ -62,7 +62,11 @@ _DEFUN(std, (ptr, flags, file, data),
>     ptr->_flags |= __SL64;
>   #endif /* __LARGE64_FILES */
>     ptr->_seek = __sseek;
> +#ifdef _STDIO_CLOSE_PER_REENT_STD_STREAMS
>     ptr->_close = __sclose;
> +#else /* _STDIO_CLOSE_STD_STREAMS */
> +  ptr->_close = NULL;
> +#endif /* _STDIO_CLOSE_STD_STREAMS */
>   #if !defined(__SINGLE_THREAD__) && !defined(_REENT_SMALL)
>     __lock_init_recursive (ptr->_lock);
>     /*
> diff --git a/newlib/libc/stdio/local.h b/newlib/libc/stdio/local.h
> index cbfeac7..ec5efab 100644
> --- a/newlib/libc/stdio/local.h
> +++ b/newlib/libc/stdio/local.h
> @@ -32,6 +32,16 @@
>   # include <io.h>
>   #endif
>   
> +/* The following define determines if the per-reent stdin, stdout and stderr
> +   streams are closed during _reclaim_reent().  The stdin, stdout and stderr
> +   streams are initialized to use file descriptors 0, 1 and 2 respectively.  In
> +   case _STDIO_CLOSE_PER_REENT_STD_STREAMS is defined these file descriptors
> +   will be closed via close() provided the owner of the reent structure
> +   triggerd the on demand reent initilization, see CHECK_INIT(). */
> +#ifndef __rtems__
> +#define _STDIO_CLOSE_PER_REENT_STD_STREAMS
> +#endif
> +
>   /* The following macros are supposed to replace calls to _flockfile/_funlockfile
>      and __sfp_lock_acquire/__sfp_lock_release.  In case of multi-threaded
>      environments using pthreads, it's not sufficient to lock the stdio functions


-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel.sherrill@OARcorp.com        On-Line Applications Research
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