[PATCH] Restore _lock initialization in single threaded mode

[Jeff Johnston]

Hi Torbjorn,

Could you clarify?  Your description and title says when SINGLE_THREAD, but
your patch is #ifndef __SINGLE_THREAD__.

-- Jeff J.

On Mon, Aug 29, 2022 at 11:11 AM Torbjörn SVENSSON <
torbjorn.svensson@foss.st.com> wrote:

> When __SINGLE_THREAD__ is defined, stdin, stdout and stderr needs to
> have their _lock instance initialized. The __sfp() method is not
> invoked for the 3 mentioned fds thus, the std() method needs to handle
> the initialization of the lock.
>
> This is more or less a revert of 382550072b49430f8c69adee937a0ba07bd385e6
>
> Signed-off-by: Torbjörn SVENSSON <torbjorn.svensson@foss.st.com>
> ---
>  newlib/libc/stdio/findfp.c | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/newlib/libc/stdio/findfp.c b/newlib/libc/stdio/findfp.c
> index c43028209..f7249f6d7 100644
> --- a/newlib/libc/stdio/findfp.c
> +++ b/newlib/libc/stdio/findfp.c
> @@ -88,6 +88,10 @@ std (FILE *ptr,
>  #else /* _STDIO_CLOSE_STD_STREAMS */
>    ptr->_close = NULL;
>  #endif /* _STDIO_CLOSE_STD_STREAMS */
> +#ifndef __SINGLE_THREAD__
> +  if (ptr == &__sf[0] || ptr == &__sf[1] || ptr == &__sf[2])
> +    __lock_init_recursive (&ptr->_lock);
> +#endif
>  #ifdef __SCLE
>    if (__stextmode (ptr->_file))
>      ptr->_flags |= __SCLE;
> --
> 2.25.1
>
>