linux-kernel - Re: [PATCH 04/19] perf metric: Add expr__del

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Date:   Sun, 26 Jul 2020 14:47:11 +0530
From:   kajoljain <kjain@...ux.ibm.com>
To:     Jiri Olsa <jolsa@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Ian Rogers <irogers@...gle.com>,
        lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Michael Petlan <mpetlan@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        John Garry <john.garry@...wei.com>,
        "Paul A. Clarke" <pc@...ibm.com>,
        Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 04/19] perf metric: Add expr__del_id function



On 7/19/20 11:43 PM, Jiri Olsa wrote:
> Adding expr__del_id function to remove ID from hashmap.
> It will save us few lines in following changes.
> 
> Acked-by: Ian Rogers <irogers@...gle.com>
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>

Reviewed-By : Kajol Jain<kjain@...ux.ibm.com>

Thanks,
Kajol Jain

> ---
>  tools/perf/util/expr.c | 21 +++++++++++++--------
>  tools/perf/util/expr.h |  1 +
>  2 files changed, 14 insertions(+), 8 deletions(-)
> 
> diff --git a/tools/perf/util/expr.c b/tools/perf/util/expr.c
> index 4e5a6533dfce..f726211f49d4 100644
> --- a/tools/perf/util/expr.c
> +++ b/tools/perf/util/expr.c
> @@ -79,6 +79,17 @@ int expr__get_id(struct expr_parse_ctx *ctx, const char *id,
>  	return hashmap__find(&ctx->ids, id, (void **)data) ? 0 : -1;
>  }
>  
> +void expr__del_id(struct expr_parse_ctx *ctx, const char *id)
> +{
> +	struct expr_id_data *old_val = NULL;
> +	char *old_key = NULL;
> +
> +	hashmap__delete(&ctx->ids, id,
> +			(const void **)&old_key, (void **)&old_val);
> +	free(old_key);
> +	free(old_val);
> +}
> +
>  void expr__ctx_init(struct expr_parse_ctx *ctx)
>  {
>  	hashmap__init(&ctx->ids, key_hash, key_equal, NULL);
> @@ -136,16 +147,10 @@ int expr__parse(double *final_val, struct expr_parse_ctx *ctx,
>  int expr__find_other(const char *expr, const char *one,
>  		     struct expr_parse_ctx *ctx, int runtime)
>  {
> -	struct expr_id_data *old_val = NULL;
> -	char *old_key = NULL;
>  	int ret = __expr__parse(NULL, ctx, expr, EXPR_OTHER, runtime);
>  
> -	if (one) {
> -		hashmap__delete(&ctx->ids, one,
> -				(const void **)&old_key, (void **)&old_val);
> -		free(old_key);
> -		free(old_val);
> -	}
> +	if (one)
> +		expr__del_id(ctx, one);
>  
>  	return ret;
>  }
> diff --git a/tools/perf/util/expr.h b/tools/perf/util/expr.h
> index f38292fdab19..2462abd0ac65 100644
> --- a/tools/perf/util/expr.h
> +++ b/tools/perf/util/expr.h
> @@ -26,6 +26,7 @@ struct expr_scanner_ctx {
>  
>  void expr__ctx_init(struct expr_parse_ctx *ctx);
>  void expr__ctx_clear(struct expr_parse_ctx *ctx);
> +void expr__del_id(struct expr_parse_ctx *ctx, const char *id);
>  int expr__add_id(struct expr_parse_ctx *ctx, const char *id);
>  int expr__add_id_val(struct expr_parse_ctx *ctx, const char *id, double val);
>  int expr__get_id(struct expr_parse_ctx *ctx, const char *id,
>