Re: [PATCH 28/36] attr: keep attr stack for each check

> Instead of having a global attr stack, attach the stack to each check.
> This allows to use the attr in a multithreaded way.
> 
> 
> 
> Signed-off-by: Stefan Beller <sbeller@google.com>
> ---
>  attr.c    | 101 +++++++++++++++++++++++++++++++++++++++-----------------------
>  attr.h    |   4 ++-
>  hashmap.h |   2 ++
>  3 files changed, 69 insertions(+), 38 deletions(-)
> 
> diff --git a/attr.c b/attr.c
> index 89ae155..b65437d 100644
> --- a/attr.c
> +++ b/attr.c
> @@ -372,15 +372,17 @@ static struct match_attr *parse_attr_line(const char *line, const char *src,
>   * .gitignore file and info/excludes file as a fallback.
>   */
>  
> -/* NEEDSWORK: This will become per git_attr_check */
> -static struct attr_stack {
> +struct attr_stack {
>  	struct attr_stack *prev;
>  	char *origin;
>  	size_t originlen;
>  	unsigned num_matches;
>  	unsigned alloc;
>  	struct match_attr **attrs;
> -} *attr_stack;
> +};
> +
> +struct hashmap all_attr_stacks;
> +int all_attr_stacks_init;