Re: [PATCH BlueZ] shared/gatt-db: Skip ahead if handle range is not within service

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Hi,

On Wed, Apr 3, 2019 at 8:38 PM Luiz Augusto von Dentz
<luiz.dentz@xxxxxxxxx> wrote:
>
> From: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
>
> This checks if a range is within service handles skipping if it is not,
> it also convert the direct search to use
> gatt_db_foreach_service_in_range instead so all operation that do
> lookups in a range can benefit from such optimization.
> ---
>  src/shared/gatt-db.c | 40 +++++++++++++++++++---------------------
>  1 file changed, 19 insertions(+), 21 deletions(-)
>
> diff --git a/src/shared/gatt-db.c b/src/shared/gatt-db.c
> index b5f7094da..7b8d72325 100644
> --- a/src/shared/gatt-db.c
> +++ b/src/shared/gatt-db.c
> @@ -1180,11 +1180,10 @@ struct find_by_type_value_data {
>         unsigned int num_of_res;
>  };
>
> -static void find_by_type(void *data, void *user_data)
> +static void find_by_type(struct gatt_db_attribute *attribute, void *user_data)
>  {
>         struct find_by_type_value_data *search_data = user_data;
> -       struct gatt_db_service *service = data;
> -       struct gatt_db_attribute *attribute;
> +       struct gatt_db_service *service = attribute->service;
>         int i;
>
>         if (!service->active)
> @@ -1235,7 +1234,8 @@ unsigned int gatt_db_find_by_type(struct gatt_db *db, uint16_t start_handle,
>         data.func = func;
>         data.user_data = user_data;
>
> -       queue_foreach(db->services, find_by_type, &data);
> +       gatt_db_foreach_service_in_range(db, NULL, find_by_type, &data,
> +                                               start_handle, end_handle);
>
>         return data.num_of_res;
>  }
> @@ -1259,7 +1259,8 @@ unsigned int gatt_db_find_by_type_value(struct gatt_db *db,
>         data.value = value;
>         data.value_len = value_len;
>
> -       queue_foreach(db->services, find_by_type, &data);
> +       gatt_db_foreach_service_in_range(db, NULL, find_by_type, &data,
> +                                               start_handle, end_handle);
>
>         return data.num_of_res;
>  }
> @@ -1271,11 +1272,10 @@ struct read_by_type_data {
>         uint16_t end_handle;
>  };
>
> -static void read_by_type(void *data, void *user_data)
> +static void read_by_type(struct gatt_db_attribute *attribute, void *user_data)
>  {
>         struct read_by_type_data *search_data = user_data;
> -       struct gatt_db_service *service = data;
> -       struct gatt_db_attribute *attribute;
> +       struct gatt_db_service *service = attribute->service;
>         int i;
>
>         if (!service->active)
> @@ -1310,7 +1310,8 @@ void gatt_db_read_by_type(struct gatt_db *db, uint16_t start_handle,
>         data.end_handle = end_handle;
>         data.queue = queue;
>
> -       queue_foreach(db->services, read_by_type, &data);
> +       gatt_db_foreach_service_in_range(db, NULL, read_by_type, &data,
> +                                               start_handle, end_handle);
>  }
>
>
> @@ -1320,21 +1321,16 @@ struct find_information_data {
>         uint16_t end_handle;
>  };
>
> -static void find_information(void *data, void *user_data)
> +static void find_information(struct gatt_db_attribute *attribute,
> +                                               void *user_data)
>  {
>         struct find_information_data *search_data = user_data;
> -       struct gatt_db_service *service = data;
> -       struct gatt_db_attribute *attribute;
> +       struct gatt_db_service *service = attribute->service;
>         int i;
>
>         if (!service->active)
>                 return;
>
> -       /* Check if service is in range */
> -       if ((service->attributes[0]->handle + service->num_handles - 1) <
> -                                               search_data->start_handle)
> -               return;
> -
>         for (i = 0; i < service->num_handles; i++) {
>                 attribute = service->attributes[i];
>                 if (!attribute)
> @@ -1360,7 +1356,8 @@ void gatt_db_find_information(struct gatt_db *db, uint16_t start_handle,
>         data.end_handle = end_handle;
>         data.queue = queue;
>
> -       queue_foreach(db->services, find_information, &data);
> +       gatt_db_foreach_service_in_range(db, NULL, find_information, &data,
> +                                               start_handle, end_handle);
>  }
>
>  void gatt_db_foreach_service(struct gatt_db *db, const bt_uuid_t *uuid,
> @@ -1382,12 +1379,13 @@ static void foreach_service_in_range(void *data, void *user_data)
>  {
>         struct gatt_db_service *service = data;
>         struct foreach_data *foreach_data = user_data;
> -       uint16_t svc_start;
> +       uint16_t svc_start, svc_end;
>         bt_uuid_t uuid;
>
> -       svc_start = get_handle_at_index(service, 0);
> +       gatt_db_service_get_handles(service, &svc_start, &svc_end);
>
> -       if (svc_start > foreach_data->end || svc_start < foreach_data->start)
> +       /* Check if service is within requested range */
> +       if (svc_start > foreach_data->end || svc_end < foreach_data->start)
>                 return;
>
>         if (foreach_data->uuid) {
> --
> 2.20.1

Applied.

-- 
Luiz Augusto von Dentz



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