Re: [PATCH V4 6/8] libgpiod: Derive debug traits for few definitions

[Kent Gibson <warthog618@xxxxxxxxx>]

On Fri, Jul 08, 2022 at 05:04:59PM +0530, Viresh Kumar wrote:
> These are required for tests, which will be added by a later commit.
> 

Squash this patch into patch 4, as you know you will need them
eventually.  All public types should implement Debug[1].

They should also implement Clone, Eq, PartialEq and Default where
that makes sense.  And Copy if you are sure you wont add something
non-Copyable to them in the future.

Cheers,
Kent.

[1] https://rust-lang.github.io/api-guidelines/debuggability.html

> Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
> ---
>  bindings/rust/src/chip.rs      | 5 +++++
>  bindings/rust/src/chip_info.rs | 1 +
>  bindings/rust/src/lib.rs       | 8 +++++++-
>  bindings/rust/src/line_info.rs | 1 +
>  4 files changed, 14 insertions(+), 1 deletion(-)
> 
> diff --git a/bindings/rust/src/chip.rs b/bindings/rust/src/chip.rs
> index 50b5d6102f96..ecff4b003cd9 100644
> --- a/bindings/rust/src/chip.rs
> +++ b/bindings/rust/src/chip.rs
> @@ -21,6 +21,7 @@ use super::{
>  /// character device. It exposes basic information about the chip and allows
>  /// callers to retrieve information about each line, watch lines for state
>  /// changes and make line requests.
> +#[derive(Debug)]
>  pub(crate) struct ChipInternal {
>      chip: *mut bindings::gpiod_chip,
>  }
> @@ -52,11 +53,15 @@ impl Drop for ChipInternal {
>      }
>  }
>  
> +#[derive(Debug)]
>  pub struct Chip {
>      ichip: Arc<ChipInternal>,
>      info: ChipInfo,
>  }
>  
> +unsafe impl Send for Chip {}
> +unsafe impl Sync for Chip {}
> +
>  impl Chip {
>      /// Find a chip by path.
>      pub fn open(path: &str) -> Result<Self> {
> diff --git a/bindings/rust/src/chip_info.rs b/bindings/rust/src/chip_info.rs
> index 950368b54c6f..7188f91a92a6 100644
> --- a/bindings/rust/src/chip_info.rs
> +++ b/bindings/rust/src/chip_info.rs
> @@ -11,6 +11,7 @@ use vmm_sys_util::errno::Error as IoError;
>  use super::{bindings, ChipInternal, Error, Result};
>  
>  /// GPIO chip Information
> +#[derive(Debug)]
>  pub struct ChipInfo {
>      info: *mut bindings::gpiod_chip_info,
>  }
> diff --git a/bindings/rust/src/lib.rs b/bindings/rust/src/lib.rs
> index 2f2ac515d353..63b0b82281b7 100644
> --- a/bindings/rust/src/lib.rs
> +++ b/bindings/rust/src/lib.rs
> @@ -59,6 +59,7 @@ pub enum Error {
>  }
>  
>  /// Direction settings.
> +#[derive(Debug, PartialEq)]
>  pub enum Direction {
>      /// Request the line(s), but don't change direction.
>      AsIs,
> @@ -88,6 +89,7 @@ impl Direction {
>  }
>  
>  /// Internal bias settings.
> +#[derive(Debug, PartialEq)]
>  pub enum Bias {
>      /// Don't change the bias setting when applying line config.
>      AsIs,
> @@ -125,6 +127,7 @@ impl Bias {
>  }
>  
>  /// Drive settings.
> +#[derive(Debug, PartialEq)]
>  pub enum Drive {
>      /// Drive setting is push-pull.
>      PushPull,
> @@ -154,6 +157,7 @@ impl Drive {
>  }
>  
>  /// Edge detection settings.
> +#[derive(Debug, PartialEq)]
>  pub enum Edge {
>      /// Line edge detection is disabled.
>      None,
> @@ -223,6 +227,7 @@ impl Config {
>  }
>  
>  /// Event clock settings.
> +#[derive(Debug, PartialEq)]
>  pub enum EventClock {
>      /// Line uses the monotonic clock for edge event timestamps.
>      Monotonic,
> @@ -248,6 +253,7 @@ impl EventClock {
>  }
>  
>  /// Line status change event types.
> +#[derive(Debug, PartialEq)]
>  pub enum Event {
>      /// Line has been requested.
>      LineRequested,
> @@ -268,7 +274,7 @@ impl Event {
>      }
>  }
>  
> -#[derive(Copy, Clone)]
> +#[derive(Copy, Clone, Debug, PartialEq)]
>  /// Edge event types.
>  pub enum LineEdgeEvent {
>      /// Rising edge event.
> diff --git a/bindings/rust/src/line_info.rs b/bindings/rust/src/line_info.rs
> index 70b6bd6a84bb..426bd16aa616 100644
> --- a/bindings/rust/src/line_info.rs
> +++ b/bindings/rust/src/line_info.rs
> @@ -23,6 +23,7 @@ use super::{
>  /// line, which does not include the line value.  The line must be requested
>  /// to access the line value.
>  
> +#[derive(Debug)]
>  pub struct LineInfo {
>      info: *mut bindings::gpiod_line_info,
>      ichip: Option<Arc<ChipInternal>>,
> -- 
> 2.31.1.272.g89b43f80a514
>