[PATCH] gdb/linux-fork: simplify one_fork_p

[Christian Biesinger via gdb-patches]

On Sun, Jan 19, 2020 at 11:11 AM Simon Marchi <simon.marchi@polymtl.ca> wrote:
>
> Unless I'm missing something, this function is a complicated way of
> saying "fork_list.size () == 1".

Before C++11, size() wasn't guaranteed to run in constant time, so I
assume the code was written to handle that. But GDB uses C++11, so
this change seems fine.
https://en.cppreference.com/w/cpp/container/list/size

>
> gdb/ChangeLog:
>
>         * linux-fork.c (one_fork_p): Simplify.
> ---
>  gdb/linux-fork.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/gdb/linux-fork.c b/gdb/linux-fork.c
> index 284f1985d0dc..357188685d07 100644
> --- a/gdb/linux-fork.c
> +++ b/gdb/linux-fork.c
> @@ -110,8 +110,7 @@ find_last_fork (void)
>  static bool
>  one_fork_p ()
>  {
> -  return (!fork_list.empty ()
> -         && &fork_list.front () == &fork_list.back ());
> +  return fork_list.size () == 1;
>  }
>
>  /* Add a new fork to the internal fork list.  */
> --
> 2.24.1
>