Big cleanup

Signed-off-by: Michael X. Grey <grey@openrobotics.org>

rclrs/src/client.rs

@@ -10,8 +10,8 @@ use crate::{
     error::ToResult,
     rcl_bindings::*,
     MessageCow, Node, RclrsError, RclReturnCode, Promise, ENTITY_LIFECYCLE_MUTEX,
-    Executable, QoSProfile, Waitable, WaitableLifecycle,
-    ExecutableHandle, ExecutableKind, ServiceInfo,
+    RclPrimitive, QoSProfile, Waitable, WaitableLifecycle,
+    RclPrimitiveHandle, RclPrimitiveKind, ServiceInfo,
 };
 
 mod client_async_callback;
@@ -251,20 +251,20 @@ where
     board: Arc<Mutex<ClientRequestBoard<T>>>
 }
 
-impl<T> Executable for ClientExecutable<T>
+impl<T> RclPrimitive for ClientExecutable<T>
 where
     T: rosidl_runtime_rs::Service,
 {
     fn execute(&mut self) -> Result<(), RclrsError> {
         self.board.lock().unwrap().execute(&self.handle)
     }
 
-    fn handle(&self) -> ExecutableHandle {
-        ExecutableHandle::Client(self.handle.lock())
+    fn handle(&self) -> RclPrimitiveHandle {
+        RclPrimitiveHandle::Client(self.handle.lock())
     }
 
-    fn kind(&self) -> ExecutableKind {
-        ExecutableKind::Client
+    fn kind(&self) -> RclPrimitiveKind {
+        RclPrimitiveKind::Client
     }
 }
 

rclrs/src/client/client_async_callback.rs

@@ -13,7 +13,10 @@ pub trait ClientAsyncCallback<T, Args>: Send + 'static
 where
     T: Service,
 {
+    /// This represents the type of task (Future) that will be produced by the callback
     type Task: Future<Output = ()> + Send;
+
+    /// Trigger the callback to run
     fn run_client_async_callback(self, response: T::Response, info: ServiceInfo) -> Self::Task;
 }
 

rclrs/src/client/client_callback.rs

@@ -11,6 +11,7 @@ pub trait ClientCallback<T, Args>: Send + 'static
 where
     T: Service,
 {
+    /// Trigger the callback to run
     fn run_client_callback(self, response: T::Response, info: ServiceInfo);
 }
 

rclrs/src/client/client_output.rs

@@ -13,13 +13,15 @@ use crate::{
 ///
 /// Users never need to use this trait directly.
 pub trait ClientOutput<Response>: Sized {
+    /// Create the appropriate type of channel to send the information that the
+    /// user asked for.
     fn create_channel() -> (AnyClientOutputSender<Response>, Promise<Self>);
 }
 
 impl<Response: Message> ClientOutput<Response> for Response {
     fn create_channel() -> (AnyClientOutputSender<Response>, Promise<Self>) {
         let (sender, receiver) = channel();
-        (AnyClientOutputSender::RequestOnly(sender), receiver)
+        (AnyClientOutputSender::ResponseOnly(sender), receiver)
     }
 }
 
@@ -39,8 +41,11 @@ impl<Response: Message> ClientOutput<Response> for (Response, ServiceInfo) {
 
 /// Can send any kind of response for a client call.
 pub enum AnyClientOutputSender<Response> {
-    RequestOnly(Sender<Response>),
+    /// The user only asked for the response.
+    ResponseOnly(Sender<Response>),
+    /// The user also asked for the RequestId
     WithId(Sender<(Response, RequestId)>),
+    /// The user also asked for the ServiceInfo
     WithServiceInfo(Sender<(Response, ServiceInfo)>),
 }
 
@@ -51,17 +56,17 @@ impl<Response: Message> AnyClientOutputSender<Response> {
         service_info: rmw_service_info_t,
     ) {
         match self {
-            Self::RequestOnly(sender) => {
-                sender.send(response);
+            Self::ResponseOnly(sender) => {
+                let _ = sender.send(response);
             }
             Self::WithId(sender) => {
-                sender.send((
+                let _ = sender.send((
                     response,
                     RequestId::from_rmw_request_id(&service_info.request_id),
                 ));
             }
             Self::WithServiceInfo(sender) => {
-                sender.send((
+                let _ = sender.send((
                     response,
                     ServiceInfo::from_rmw_service_info(&service_info),
                 ));

rclrs/src/executor/basic_executor.rs

@@ -1,17 +1,15 @@
 use futures::{
-    future::{BoxFuture, FutureExt},
+    future::BoxFuture,
     task::{waker_ref, ArcWake},
     channel::{oneshot, mpsc::UnboundedSender},
 };
 use std::{
-    future::Future,
     sync::{
         mpsc::{Sender, Receiver, channel},
         atomic::{AtomicBool, Ordering},
         Arc, Mutex,
     },
     task::Context as TaskContext,
-    time::Duration,
 };
 
 use crate::{

rclrs/src/service.rs

@@ -8,7 +8,7 @@ use crate::{
     error::ToResult,
     rcl_bindings::*,
     NodeHandle, RclrsError, Waitable, WaitableLifecycle, QoSProfile,
-    Executable, ExecutableKind, ExecutableHandle, ENTITY_LIFECYCLE_MUTEX, ExecutorCommands,
+    RclPrimitive, RclPrimitiveKind, RclPrimitiveHandle, ENTITY_LIFECYCLE_MUTEX, ExecutorCommands,
 };
 
 mod any_service_callback;
@@ -44,6 +44,7 @@ where
     callback: Arc<Mutex<AnyServiceCallback<T>>>,
     /// Holding onto this keeps the waiter for this service alive in the wait
     /// set of the executor.
+    #[allow(unused)]
     lifecycle: WaitableLifecycle,
 }
 
@@ -162,7 +163,7 @@ struct ServiceExecutable<T: rosidl_runtime_rs::Service> {
     commands: Arc<ExecutorCommands>,
 }
 
-impl<T> Executable for ServiceExecutable<T>
+impl<T> RclPrimitive for ServiceExecutable<T>
 where
     T: rosidl_runtime_rs::Service,
 {
@@ -174,12 +175,12 @@ where
         Ok(())
     }
 
-    fn kind(&self) -> crate::ExecutableKind {
-        ExecutableKind::Service
+    fn kind(&self) -> crate::RclPrimitiveKind {
+        RclPrimitiveKind::Service
     }
 
-    fn handle(&self) -> ExecutableHandle {
-        ExecutableHandle::Service(self.handle.lock())
+    fn handle(&self) -> RclPrimitiveHandle {
+        RclPrimitiveHandle::Service(self.handle.lock())
     }
 }
 

rclrs/src/subscription.rs

@@ -9,8 +9,8 @@ use crate::{
     error::ToResult,
     qos::QoSProfile,
     rcl_bindings::*,
-    ExecutorCommands, NodeHandle, RclrsError, Waitable, Executable, ExecutableHandle,
-    ExecutableKind, WaitableLifecycle, ENTITY_LIFECYCLE_MUTEX,
+    ExecutorCommands, NodeHandle, RclrsError, Waitable, RclPrimitive, RclPrimitiveHandle,
+    RclPrimitiveKind, WaitableLifecycle, ENTITY_LIFECYCLE_MUTEX,
 };
 
 mod any_subscription_callback;
@@ -57,6 +57,7 @@ where
     callback: Arc<Mutex<AnySubscriptionCallback<T>>>,
     /// Holding onto this keeps the waiter for this subscription alive in the
     /// wait set of the executor.
+    #[allow(unused)]
     lifecycle: WaitableLifecycle,
 }
 
@@ -172,20 +173,20 @@ struct SubscriptionExecutable<T: Message> {
     commands: Arc<ExecutorCommands>,
 }
 
-impl<T> Executable for SubscriptionExecutable<T>
+impl<T> RclPrimitive for SubscriptionExecutable<T>
 where
     T: Message,
 {
     fn execute(&mut self) -> Result<(), RclrsError> {
         self.callback.lock().unwrap().execute(&self.handle, &self.commands)
     }
 
-    fn kind(&self) -> crate::ExecutableKind {
-        ExecutableKind::Subscription
+    fn kind(&self) -> crate::RclPrimitiveKind {
+        RclPrimitiveKind::Subscription
     }
 
-    fn handle(&self) -> ExecutableHandle {
-        ExecutableHandle::Subscription(self.handle.lock())
+    fn handle(&self) -> RclPrimitiveHandle {
+        RclPrimitiveHandle::Subscription(self.handle.lock())
     }
 }
 

rclrs/src/subscription/any_subscription_callback.rs

@@ -50,27 +50,27 @@ impl<T: Message> AnySubscriptionCallback<T> {
             match self {
                 AnySubscriptionCallback::Regular(cb) => {
                     let (msg, _) = Self::take(handle)?;
-                    commands.run(cb(msg));
+                    let _ = commands.run(cb(msg));
                 }
                 AnySubscriptionCallback::RegularWithMessageInfo(cb) => {
                     let (msg, msg_info) = Self::take(handle)?;
-                    commands.run(cb(msg, msg_info));
+                    let _ = commands.run(cb(msg, msg_info));
                 }
                 AnySubscriptionCallback::Boxed(cb) => {
                     let (msg, _) = Self::take_boxed(handle)?;
-                    commands.run(cb(msg));
+                    let _ = commands.run(cb(msg));
                 }
                 AnySubscriptionCallback::BoxedWithMessageInfo(cb) => {
                     let (msg, msg_info) = Self::take_boxed(handle)?;
-                    commands.run(cb(msg, msg_info));
+                    let _ = commands.run(cb(msg, msg_info));
                 }
                 AnySubscriptionCallback::Loaned(cb) => {
                     let (msg, _) = Self::take_loaned(handle)?;
-                    commands.run(cb(msg));
+                    let _ = commands.run(cb(msg));
                 }
                 AnySubscriptionCallback::LoanedWithMessageInfo(cb) => {
                     let (msg, msg_info) = Self::take_loaned(handle)?;
-                    commands.run(cb(msg, msg_info));
+                    let _ = commands.run(cb(msg, msg_info));
                 }
             }
             Ok(())

rclrs/src/wait_set.rs

@@ -26,6 +26,9 @@ use crate::{
 mod guard_condition;
 pub use guard_condition::*;
 
+mod rcl_primitive;
+pub use rcl_primitive::*;
+
 mod waitable;
 pub use waitable::*;
 
@@ -34,7 +37,7 @@ pub use wait_set_runner::*;
 
 /// A struct for waiting on subscriptions and other waitable entities to become ready.
 pub struct WaitSet {
-    primitives: HashMap<ExecutableKind, Vec<Waitable>>,
+    primitives: HashMap<RclPrimitiveKind, Vec<Waitable>>,
     handle: WaitSetHandle,
 }
 
@@ -70,7 +73,7 @@ impl WaitSet {
             if entity.in_wait_set() {
                 return Err(RclrsError::AlreadyAddedToWaitSet);
             }
-            let kind = entity.executable.kind();
+            let kind = entity.primitive.kind();
             self.primitives.entry(kind).or_default().push(entity);
         }
         self.resize_rcl_containers()?;
@@ -116,7 +119,7 @@ impl WaitSet {
     pub fn wait(
         &mut self,
         timeout: Option<Duration>,
-        mut f: impl FnMut(&mut dyn Executable) -> Result<(), RclrsError>,
+        mut f: impl FnMut(&mut dyn RclPrimitive) -> Result<(), RclrsError>,
     ) -> Result<(), RclrsError> {
         let timeout_ns = match timeout.map(|d| d.as_nanos()) {
             None => -1,
@@ -153,7 +156,7 @@ impl WaitSet {
         // the callback for those that were.
         for waiter in self.primitives.values_mut().flat_map(|v| v) {
             if waiter.is_ready(&self.handle.rcl_wait_set) {
-                f(&mut *waiter.executable)?;
+                f(&mut *waiter.primitive)?;
             }
         }
 

rclrs/src/wait_set/guard_condition.rs

@@ -5,8 +5,8 @@ use std::{
 
 use crate::{
     rcl_bindings::*,
-    ContextHandle, RclrsError, ToResult, WaitableLifecycle, Executable,
-    Waitable, ExecutableKind, ExecutableHandle,
+    ContextHandle, RclrsError, ToResult, WaitableLifecycle, RclPrimitive,
+    Waitable, RclPrimitiveKind, RclPrimitiveHandle,
 };
 
 /// A waitable entity used for waking up a wait set manually.
@@ -135,28 +135,41 @@ struct GuardConditionHandle {
 /// from rcl and either have static lifetimes or lifetimes that depend on
 /// something else.
 pub enum InnerGuardConditionHandle {
+    /// This variant means the guard condition was created and owned by rclrs.
+    /// Its memory is managed by us.
     Owned(rcl_guard_condition_t),
+    /// This variant means the guard condition was created and owned by rcl.
+    /// The owner object represents something that the lifecycle of the guard
+    /// condition depends on, such as the rcl_node that created it.
     Unowned {
+        /// This is the unowned guard condition pointer. We must not deallocate
+        /// it.
         handle: *const rcl_guard_condition_t,
+        /// This somehow holds a shared reference to the owner of the guard
+        /// condition. We need to hold onto this to ensure the guard condition
+        /// remains valid.
         owner: Box<dyn Any>,
     },
 }
 
 impl InnerGuardConditionHandle {
+    /// Get the handle if it is owned by rclrs
     pub fn owned(&self) -> Option<&rcl_guard_condition_t> {
         match self {
             Self::Owned(handle) => Some(handle),
             _ => None,
         }
     }
 
+    /// Get the handle if it is owned by rclrs
     pub fn owned_mut(&mut self) -> Option<&mut rcl_guard_condition_t> {
         match self {
             Self::Owned(handle) => Some(handle),
             _ => None,
         }
     }
 
+    /// Apply a function to the handle
     pub fn use_handle<Out>(&self, f: impl FnOnce(&rcl_guard_condition_t) -> Out) -> Out {
         match self {
             Self::Owned(handle) => f(handle),
@@ -191,20 +204,20 @@ struct GuardConditionExecutable {
     callback: Option<Box<dyn FnMut() + Send + Sync>>,
 }
 
-impl Executable for GuardConditionExecutable {
+impl RclPrimitive for GuardConditionExecutable {
     fn execute(&mut self) -> Result<(), RclrsError> {
         if let Some(callback) = &mut self.callback {
             callback();
         }
         Ok(())
     }
 
-    fn kind(&self) -> ExecutableKind {
-        ExecutableKind::GuardCondition
+    fn kind(&self) -> RclPrimitiveKind {
+        RclPrimitiveKind::GuardCondition
     }
 
-    fn handle(&self) -> ExecutableHandle {
-        ExecutableHandle::GuardCondition(
+    fn handle(&self) -> RclPrimitiveHandle {
+        RclPrimitiveHandle::GuardCondition(
             self.handle.rcl_guard_condition.lock().unwrap()
         )
     }