feat: add multiple channel providers

Each provider is enabled via a feature flag.
The currently implemented providers are:
- std::mpsc
- flume
- crossbeam_channel

Cargo.toml

@@ -15,5 +15,24 @@ exclude = ["flake.nix", "flake.lock", ".envrc", "cliff.toml", "release-plz.toml"
 
 [dependencies]
 thiserror = "2.0"
+flume = { version = "0.11", optional = true }
+crossbeam-channel = { version = "0.5", optional = true }
+
+[features]
+default = ["all"]
+
+sync = []
+async = []
+
+sync-std = ["sync"]
+sync-flume = ["sync", "dep:flume"]
+sync-crossbeam = ["sync", "dep:crossbeam-channel"]
+
+all-sync = ["sync-std", "sync-flume", "sync-crossbeam"]
+
+all = ["all-sync"]
 
 [lib]
+
+[package.metadata.docs.rs]
+all-features = true

README.md

@@ -32,11 +32,11 @@ suck = "*"
 ## Quick Start
 
 ```rust
-use suck::SuckPair;
+use suck::sync::StdSuck;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    // Create a pair
+    // Create a pair (using default std backend)
-    let (sucker, sourcer) = SuckPair::<i32>::pair();
+    let (sucker, sourcer) = StdSuck::<i32>::pair();
 
     // Start producer in a thread
     let producer = std::thread::spawn(move || {

src/channel.rs

@@ -1,61 +1,38 @@
-use std::sync::mpsc;
 use std::sync::{Arc, Mutex};
 
 use crate::error::Error;
+use crate::sync::traits::{ChannelReceiver, ChannelSender};
 use crate::types::{ChannelState, Request, Response, ValueSource};
 
 /// The consumer side of the channel that requests values
-pub struct Sucker<T> {
+pub struct Sucker<T, ST, SR>
-    request_tx: mpsc::Sender<Request>,
+where
-    response_rx: mpsc::Receiver<Response<T>>,
+    ST: ChannelSender<Request>,
-    closed: Mutex<bool>,
+    SR: ChannelReceiver<Response<T>>,
+{
+    pub(crate) request_tx: ST,
+    pub(crate) response_rx: SR,
+    pub(crate) closed: Mutex<bool>,
+    pub(crate) _phantom: std::marker::PhantomData<T>,
 }
 
 /// The producer side of the channel that provides values
-pub struct Sourcer<T> {
+pub struct Sourcer<T, SR, ST>
-    request_rx: mpsc::Receiver<Request>,
+where
-    response_tx: mpsc::Sender<Response<T>>,
+    SR: ChannelReceiver<Request>,
-    state: Arc<Mutex<ChannelState<T>>>,
+    ST: ChannelSender<Response<T>>,
+{
+    pub(crate) request_rx: SR,
+    pub(crate) response_tx: ST,
+    pub(crate) state: Arc<Mutex<ChannelState<T>>>,
+    pub(crate) _phantom: std::marker::PhantomData<T>,
 }
 
-/// Helper type for creating Sucker and Sourcer instances
+impl<T, SR, ST> Sourcer<T, SR, ST>
-pub struct SuckPair<T> {
-    _phantom: std::marker::PhantomData<T>,
-}
-
-impl<T> SuckPair<T> {
-    /// Create a new suck pair
-    pub fn pair() -> (Sucker<T>, Sourcer<T>)
-    where
-        T: Clone + Send + 'static,
-    {
-        let (request_tx, request_rx) = mpsc::channel();
-        let (response_tx, response_rx) = mpsc::channel();
-
-        let state = Arc::new(Mutex::new(ChannelState {
-            source: ValueSource::None,
-            closed: false,
-        }));
-
-        let sucker = Sucker {
-            request_tx,
-            response_rx,
-            closed: Mutex::new(false),
-        };
-
-        let sourcer = Sourcer {
-            request_rx,
-            response_tx,
-            state: Arc::clone(&state),
-        };
-
-        (sucker, sourcer)
-    }
-}
-
-impl<T> Sourcer<T>
 where
     T: Clone + Send + 'static,
+    SR: ChannelReceiver<Request>,
+    ST: ChannelSender<Response<T>>,
 {
     /// Set a fixed value
     pub fn set_static(&self, value: T) -> Result<(), Error> {
@@ -142,7 +119,11 @@ where
     }
 }
 
-impl<T> Sucker<T> {
+impl<T, ST, SR> Sucker<T, ST, SR>
+where
+    ST: ChannelSender<Request>,
+    SR: ChannelReceiver<Response<T>>,
+{
     /// Get the current value from the producer
     pub fn get(&self) -> Result<T, Error> {
         // Check if locally marked as closed

src/lib.rs

@@ -1,145 +1,14 @@
 #![doc = include_str!("../README.md")]
+#![cfg_attr(docsrs, feature(doc_auto_cfg))]
 
 pub mod channel;
 pub mod error;
+
+#[cfg(feature = "sync")]
+pub mod sync;
 pub mod types;
 
-// Re-exports
+pub use channel::{Sourcer, Sucker};
-pub use channel::{Sourcer, SuckPair, Sucker};
 pub use error::Error;
-pub use types::ValueSource;
 
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use std::thread;
 
-    #[test]
-    fn test_pre_computed_value() {
-        let (sucker, sourcer) = SuckPair::<i32>::pair();
-
-        // Start producer
-        let producer_handle = thread::spawn(move || {
-            sourcer.set_static(42).unwrap();
-            sourcer.run().unwrap();
-        });
-
-        // Ensure consumer gets the value
-        let value = sucker.get().unwrap();
-        assert_eq!(value, 42);
-
-        // Close consumer
-        sucker.close().unwrap();
-
-        producer_handle.join().unwrap();
-    }
-
-    #[test]
-    fn test_closure_value() {
-        let (sucker, sourcer) = SuckPair::<i32>::pair();
-
-        // Start producer
-        let producer_handle = std::thread::spawn(move || {
-            let counter = std::sync::Arc::new(std::sync::Mutex::new(0));
-            let counter_clone = std::sync::Arc::clone(&counter);
-            sourcer
-                .set(move || {
-                    let mut count = counter_clone.lock().unwrap();
-                    *count += 1;
-                    *count
-                })
-                .unwrap();
-            sourcer.run().unwrap();
-        });
-
-        // Ensure consumer gets the value
-        let value1 = sucker.get().unwrap();
-        assert_eq!(value1, 1);
-
-        // Ensure consumer gets the next value
-        let value2 = sucker.get().unwrap();
-        assert_eq!(value2, 2);
-
-        // Close consumer
-        sucker.close().unwrap();
-
-        producer_handle.join().unwrap();
-    }
-
-    #[test]
-    fn test_no_source_error() {
-        let (sucker, sourcer) = SuckPair::<i32>::pair();
-
-        // Start producer
-        let producer_handle = thread::spawn(move || {
-            sourcer.run().unwrap();
-        });
-
-        // Consumer should get NoSource error
-        let result = sucker.get();
-        assert!(matches!(result, Err(Error::NoSource)));
-
-        // Close consumer
-        sucker.close().unwrap();
-
-        producer_handle.join().unwrap();
-    }
-
-    #[test]
-    fn test_channel_closed_error() {
-        let (sucker, sourcer) = SuckPair::<i32>::pair();
-
-        // Start producer
-        let producer_handle = thread::spawn(move || {
-            sourcer.set_static(42).unwrap();
-            sourcer.run().unwrap();
-        });
-
-        // Close consumer
-        sucker.close().unwrap();
-
-        let result = sucker.get();
-        assert!(matches!(result, Err(Error::ChannelClosed)));
-
-        producer_handle.join().unwrap();
-    }
-
-    #[test]
-    fn test_producer_disconnection_error() {
-        let (sucker, sourcer) = SuckPair::<i32>::pair();
-
-        // Start producer
-        let producer_handle = thread::spawn(move || {
-            sourcer.set_static(42).unwrap();
-            // Simulate crash
-            panic!("Producer crashed!");
-        });
-
-        let result = sucker.get();
-        assert!(matches!(result, Err(Error::ProducerDisconnected)));
-
-        let _ = producer_handle.join();
-    }
-
-    #[test]
-    fn test_is_closed() {
-        let (sucker, sourcer) = SuckPair::<i32>::pair();
-
-        assert!(!sucker.is_closed());
-
-        // Start producer
-        let producer_handle = thread::spawn(move || {
-            sourcer.set_static(42).unwrap();
-            sourcer.run().unwrap();
-        });
-
-        // Get one value
-        let _ = sucker.get().unwrap();
-        assert!(!sucker.is_closed());
-
-        // Close and check
-        sucker.close().unwrap();
-
-        producer_handle.join().unwrap();
-    }
-}

src/sync/crossbeam.rs

@@ -0,0 +1,221 @@
+#[cfg(feature = "sync-crossbeam")]
+use crate::sync::traits::{ChannelError, ChannelReceiver, ChannelSender, ChannelType};
+use crate::types;
+use crossbeam_channel;
+
+type CrossbeamSucker<T> = crate::Sucker<T, CrossbeamSender<types::Request>, CrossbeamReceiver<types::Response<T>>>;
+type CrossbeamSourcer<T> = crate::Sourcer<T, CrossbeamReceiver<types::Request>, CrossbeamSender<types::Response<T>>>;
+
+/// Internal sender type for crossbeam backend
+pub struct CrossbeamSender<T>(crossbeam_channel::Sender<T>);
+/// Internal receiver type for crossbeam backend
+pub struct CrossbeamReceiver<T>(crossbeam_channel::Receiver<T>);
+
+impl<T> ChannelSender<T> for CrossbeamSender<T> {
+    fn send(&self, msg: T) -> Result<(), ChannelError> {
+        self.0
+            .send(msg)
+            .map_err(|_| ChannelError::ProducerDisconnected)
+    }
+}
+
+impl<T> ChannelReceiver<T> for CrossbeamReceiver<T> {
+    fn recv(&self) -> Result<T, ChannelError> {
+        self.0
+            .recv()
+            .map_err(|_| ChannelError::ProducerDisconnected)
+    }
+}
+
+/// Internal channel type for crossbeam backend
+pub struct CrossbeamChannel;
+
+impl ChannelType for CrossbeamChannel {
+    type Sender<T> = CrossbeamSender<T>;
+    type Receiver<T> = CrossbeamReceiver<T>;
+
+    fn create_request_channel() -> (Self::Sender<types::Request>, Self::Receiver<types::Request>) {
+        let (tx, rx) = crossbeam_channel::unbounded();
+        (CrossbeamSender(tx), CrossbeamReceiver(rx))
+    }
+
+    fn create_response_channel<T>() -> (
+        Self::Sender<types::Response<T>>,
+        Self::Receiver<types::Response<T>>,
+    ) {
+        let (tx, rx) = crossbeam_channel::unbounded();
+        (CrossbeamSender(tx), CrossbeamReceiver(rx))
+    }
+}
+
+pub struct CrossbeamSuck<T> {
+    _phantom: std::marker::PhantomData<T>,
+}
+
+impl<T> CrossbeamSuck<T> {
+    pub fn pair() -> (CrossbeamSucker<T>, CrossbeamSourcer<T>)
+    where
+        T: Clone + Send + 'static,
+    {
+        let (request_tx, request_rx) = CrossbeamChannel::create_request_channel();
+        let (response_tx, response_rx) = CrossbeamChannel::create_response_channel::<T>();
+
+        let state = std::sync::Arc::new(std::sync::Mutex::new(crate::types::ChannelState {
+            source: crate::types::ValueSource::None,
+            closed: false,
+        }));
+
+        let sucker = crate::Sucker {
+            request_tx,
+            response_rx,
+            closed: std::sync::Mutex::new(false),
+            _phantom: std::marker::PhantomData,
+        };
+
+        let sourcer = crate::Sourcer {
+            request_rx,
+            response_tx,
+            state: std::sync::Arc::clone(&state),
+            _phantom: std::marker::PhantomData,
+        };
+
+        (sucker, sourcer)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::Error;
+    use std::thread;
+
+    #[test]
+    fn test_pre_computed_value() {
+        let (sucker, sourcer) = CrossbeamSuck::<i32>::pair();
+
+        // Start producer
+        let producer_handle = thread::spawn(move || {
+            sourcer.set_static(42).unwrap();
+            sourcer.run().unwrap();
+        });
+
+        // Ensure consumer gets the value
+        let value = sucker.get().unwrap();
+        assert_eq!(value, 42);
+
+        // Close consumer
+        sucker.close().unwrap();
+
+        producer_handle.join().unwrap();
+    }
+
+    #[test]
+    fn test_closure_value() {
+        let (sucker, sourcer) = CrossbeamSuck::<i32>::pair();
+
+        // Start producer
+        let producer_handle = std::thread::spawn(move || {
+            let counter = std::sync::Arc::new(std::sync::Mutex::new(0));
+            let counter_clone = std::sync::Arc::clone(&counter);
+            sourcer
+                .set(move || {
+                    let mut count = counter_clone.lock().unwrap();
+                    *count += 1;
+                    *count
+                })
+                .unwrap();
+            sourcer.run().unwrap();
+        });
+
+        // Ensure consumer gets the value
+        let value1 = sucker.get().unwrap();
+        assert_eq!(value1, 1);
+
+        // Ensure consumer gets the next value
+        let value2 = sucker.get().unwrap();
+        assert_eq!(value2, 2);
+
+        // Close consumer
+        sucker.close().unwrap();
+
+        producer_handle.join().unwrap();
+    }
+
+    #[test]
+    fn test_no_source_error() {
+        let (sucker, sourcer) = CrossbeamSuck::<i32>::pair();
+
+        // Start producer
+        let producer_handle = thread::spawn(move || {
+            sourcer.run().unwrap();
+        });
+
+        // Consumer should get NoSource error
+        let result = sucker.get();
+        assert!(matches!(result, Err(Error::NoSource)));
+
+        // Close consumer
+        sucker.close().unwrap();
+
+        producer_handle.join().unwrap();
+    }
+
+    #[test]
+    fn test_channel_closed_error() {
+        let (sucker, sourcer) = CrossbeamSuck::<i32>::pair();
+
+        // Start producer
+        let producer_handle = thread::spawn(move || {
+            sourcer.set_static(42).unwrap();
+            sourcer.run().unwrap();
+        });
+
+        // Close consumer
+        sucker.close().unwrap();
+
+        let result = sucker.get();
+        assert!(matches!(result, Err(Error::ChannelClosed)));
+
+        producer_handle.join().unwrap();
+    }
+
+    #[test]
+    fn test_producer_disconnection_error() {
+        let (sucker, sourcer) = CrossbeamSuck::<i32>::pair();
+
+        // Start producer
+        let producer_handle = thread::spawn(move || {
+            sourcer.set_static(42).unwrap();
+            // Simulate crash
+            panic!("Producer crashed!");
+        });
+
+        let result = sucker.get();
+        assert!(matches!(result, Err(Error::ProducerDisconnected)));
+
+        let _ = producer_handle.join();
+    }
+
+    #[test]
+    fn test_is_closed() {
+        let (sucker, sourcer) = CrossbeamSuck::<i32>::pair();
+
+        assert!(!sucker.is_closed());
+
+        // Start producer
+        let producer_handle = thread::spawn(move || {
+            sourcer.set_static(42).unwrap();
+            sourcer.run().unwrap();
+        });
+
+        // Get one value
+        let _ = sucker.get().unwrap();
+        assert!(!sucker.is_closed());
+
+        // Close and check
+        sucker.close().unwrap();
+
+        producer_handle.join().unwrap();
+    }
+}
+

src/sync/flume.rs

@@ -0,0 +1,221 @@
+#[cfg(feature = "sync-flume")]
+use crate::sync::traits::{ChannelError, ChannelReceiver, ChannelSender, ChannelType};
+use crate::types;
+use flume;
+
+type FlumeSucker<T> = crate::Sucker<T, FlumeSender<types::Request>, FlumeReceiver<types::Response<T>>>;
+type FlumeSourcer<T> = crate::Sourcer<T, FlumeReceiver<types::Request>, FlumeSender<types::Response<T>>>;
+
+/// Internal sender type for flume backend  
+pub struct FlumeSender<T>(flume::Sender<T>);
+/// Internal receiver type for flume backend
+pub struct FlumeReceiver<T>(flume::Receiver<T>);
+
+impl<T> ChannelSender<T> for FlumeSender<T> {
+    fn send(&self, msg: T) -> Result<(), ChannelError> {
+        self.0
+            .send(msg)
+            .map_err(|_| ChannelError::ProducerDisconnected)
+    }
+}
+
+impl<T> ChannelReceiver<T> for FlumeReceiver<T> {
+    fn recv(&self) -> Result<T, ChannelError> {
+        self.0
+            .recv()
+            .map_err(|_| ChannelError::ProducerDisconnected)
+    }
+}
+
+/// Internal channel type for flume backend
+pub struct FlumeChannel;
+
+impl ChannelType for FlumeChannel {
+    type Sender<T> = FlumeSender<T>;
+    type Receiver<T> = FlumeReceiver<T>;
+
+    fn create_request_channel() -> (Self::Sender<types::Request>, Self::Receiver<types::Request>) {
+        let (tx, rx) = flume::unbounded();
+        (FlumeSender(tx), FlumeReceiver(rx))
+    }
+
+    fn create_response_channel<T>() -> (
+        Self::Sender<types::Response<T>>,
+        Self::Receiver<types::Response<T>>,
+    ) {
+        let (tx, rx) = flume::unbounded();
+        (FlumeSender(tx), FlumeReceiver(rx))
+    }
+}
+
+pub struct FlumeSuck<T> {
+    _phantom: std::marker::PhantomData<T>,
+}
+
+impl<T> FlumeSuck<T> {
+    pub fn pair() -> (FlumeSucker<T>, FlumeSourcer<T>)
+    where
+        T: Clone + Send + 'static,
+    {
+        let (request_tx, request_rx) = FlumeChannel::create_request_channel();
+        let (response_tx, response_rx) = FlumeChannel::create_response_channel::<T>();
+
+        let state = std::sync::Arc::new(std::sync::Mutex::new(crate::types::ChannelState {
+            source: crate::types::ValueSource::None,
+            closed: false,
+        }));
+
+        let sucker = crate::Sucker {
+            request_tx,
+            response_rx,
+            closed: std::sync::Mutex::new(false),
+            _phantom: std::marker::PhantomData,
+        };
+
+        let sourcer = crate::Sourcer {
+            request_rx,
+            response_tx,
+            state: std::sync::Arc::clone(&state),
+            _phantom: std::marker::PhantomData,
+        };
+
+        (sucker, sourcer)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::Error;
+    use std::thread;
+
+    #[test]
+    fn test_pre_computed_value() {
+        let (sucker, sourcer) = FlumeSuck::<i32>::pair();
+
+        // Start producer
+        let producer_handle = thread::spawn(move || {
+            sourcer.set_static(42).unwrap();
+            sourcer.run().unwrap();
+        });
+
+        // Ensure consumer gets the value
+        let value = sucker.get().unwrap();
+        assert_eq!(value, 42);
+
+        // Close consumer
+        sucker.close().unwrap();
+
+        producer_handle.join().unwrap();
+    }
+
+    #[test]
+    fn test_closure_value() {
+        let (sucker, sourcer) = FlumeSuck::<i32>::pair();
+
+        // Start producer
+        let producer_handle = std::thread::spawn(move || {
+            let counter = std::sync::Arc::new(std::sync::Mutex::new(0));
+            let counter_clone = std::sync::Arc::clone(&counter);
+            sourcer
+                .set(move || {
+                    let mut count = counter_clone.lock().unwrap();
+                    *count += 1;
+                    *count
+                })
+                .unwrap();
+            sourcer.run().unwrap();
+        });
+
+        // Ensure consumer gets the value
+        let value1 = sucker.get().unwrap();
+        assert_eq!(value1, 1);
+
+        // Ensure consumer gets the next value
+        let value2 = sucker.get().unwrap();
+        assert_eq!(value2, 2);
+
+        // Close consumer
+        sucker.close().unwrap();
+
+        producer_handle.join().unwrap();
+    }
+
+    #[test]
+    fn test_no_source_error() {
+        let (sucker, sourcer) = FlumeSuck::<i32>::pair();
+
+        // Start producer
+        let producer_handle = thread::spawn(move || {
+            sourcer.run().unwrap();
+        });
+
+        // Consumer should get NoSource error
+        let result = sucker.get();
+        assert!(matches!(result, Err(Error::NoSource)));
+
+        // Close consumer
+        sucker.close().unwrap();
+
+        producer_handle.join().unwrap();
+    }
+
+    #[test]
+    fn test_channel_closed_error() {
+        let (sucker, sourcer) = FlumeSuck::<i32>::pair();
+
+        // Start producer
+        let producer_handle = thread::spawn(move || {
+            sourcer.set_static(42).unwrap();
+            sourcer.run().unwrap();
+        });
+
+        // Close consumer
+        sucker.close().unwrap();
+
+        let result = sucker.get();
+        assert!(matches!(result, Err(Error::ChannelClosed)));
+
+        producer_handle.join().unwrap();
+    }
+
+    #[test]
+    fn test_producer_disconnection_error() {
+        let (sucker, sourcer) = FlumeSuck::<i32>::pair();
+
+        // Start producer
+        let producer_handle = thread::spawn(move || {
+            sourcer.set_static(42).unwrap();
+            // Simulate crash
+            panic!("Producer crashed!");
+        });
+
+        let result = sucker.get();
+        assert!(matches!(result, Err(Error::ProducerDisconnected)));
+
+        let _ = producer_handle.join();
+    }
+
+    #[test]
+    fn test_is_closed() {
+        let (sucker, sourcer) = FlumeSuck::<i32>::pair();
+
+        assert!(!sucker.is_closed());
+
+        // Start producer
+        let producer_handle = thread::spawn(move || {
+            sourcer.set_static(42).unwrap();
+            sourcer.run().unwrap();
+        });
+
+        // Get one value
+        let _ = sucker.get().unwrap();
+        assert!(!sucker.is_closed());
+
+        // Close and check
+        sucker.close().unwrap();
+
+        producer_handle.join().unwrap();
+    }
+}
+

src/sync/mod.rs

@@ -0,0 +1,17 @@
+pub mod traits;
+
+#[cfg(feature = "sync-crossbeam")]
+pub mod crossbeam;
+#[cfg(feature = "sync-flume")]
+pub mod flume;
+#[cfg(feature = "sync-std")]
+pub mod std;
+
+#[cfg(feature = "sync-flume")]
+pub use flume::FlumeSuck;
+
+#[cfg(feature = "sync-crossbeam")]
+pub use crossbeam::CrossbeamSuck;
+
+#[cfg(feature = "sync-std")]
+pub use std::StdSuck;

src/sync/std.rs

@@ -0,0 +1,221 @@
+use crate::sync::traits::{ChannelError, ChannelReceiver, ChannelSender, ChannelType};
+use crate::types;
+#[cfg(feature = "sync-std")]
+use std::sync::mpsc;
+
+type StdSucker<T> = crate::Sucker<T, StdSender<types::Request>, StdReceiver<types::Response<T>>>;
+type StdSourcer<T> = crate::Sourcer<T, StdReceiver<types::Request>, StdSender<types::Response<T>>>;
+
+/// Internal sender type for std backend
+pub struct StdSender<T>(mpsc::Sender<T>);
+/// Internal receiver type for std backend
+pub struct StdReceiver<T>(mpsc::Receiver<T>);
+
+impl<T> ChannelSender<T> for StdSender<T> {
+    fn send(&self, msg: T) -> Result<(), ChannelError> {
+        self.0
+            .send(msg)
+            .map_err(|_| ChannelError::ProducerDisconnected)
+    }
+}
+
+impl<T> ChannelReceiver<T> for StdReceiver<T> {
+    fn recv(&self) -> Result<T, ChannelError> {
+        self.0
+            .recv()
+            .map_err(|_| ChannelError::ProducerDisconnected)
+    }
+}
+
+/// Internal channel type for std backend
+pub struct StdChannel;
+
+impl ChannelType for StdChannel {
+    type Sender<T> = StdSender<T>;
+    type Receiver<T> = StdReceiver<T>;
+
+    fn create_request_channel() -> (Self::Sender<types::Request>, Self::Receiver<types::Request>) {
+        let (tx, rx) = mpsc::channel();
+        (StdSender(tx), StdReceiver(rx))
+    }
+
+    fn create_response_channel<T>() -> (
+        Self::Sender<types::Response<T>>,
+        Self::Receiver<types::Response<T>>,
+    ) {
+        let (tx, rx) = mpsc::channel();
+        (StdSender(tx), StdReceiver(rx))
+    }
+}
+
+pub struct StdSuck<T> {
+    _phantom: std::marker::PhantomData<T>,
+}
+
+impl<T> StdSuck<T> {
+    pub fn pair() -> (StdSucker<T>, StdSourcer<T>)
+    where
+        T: Clone + Send + 'static,
+    {
+        let (request_tx, request_rx) = StdChannel::create_request_channel();
+        let (response_tx, response_rx) = StdChannel::create_response_channel::<T>();
+
+        let state = std::sync::Arc::new(std::sync::Mutex::new(crate::types::ChannelState {
+            source: crate::types::ValueSource::None,
+            closed: false,
+        }));
+
+        let sucker = crate::Sucker {
+            request_tx,
+            response_rx,
+            closed: std::sync::Mutex::new(false),
+            _phantom: std::marker::PhantomData,
+        };
+
+        let sourcer = crate::Sourcer {
+            request_rx,
+            response_tx,
+            state: std::sync::Arc::clone(&state),
+            _phantom: std::marker::PhantomData,
+        };
+
+        (sucker, sourcer)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::Error;
+    use std::thread;
+
+    #[test]
+    fn test_pre_computed_value() {
+        let (sucker, sourcer) = StdSuck::<i32>::pair();
+
+        // Start producer
+        let producer_handle = thread::spawn(move || {
+            sourcer.set_static(42).unwrap();
+            sourcer.run().unwrap();
+        });
+
+        // Ensure consumer gets the value
+        let value = sucker.get().unwrap();
+        assert_eq!(value, 42);
+
+        // Close consumer
+        sucker.close().unwrap();
+
+        producer_handle.join().unwrap();
+    }
+
+    #[test]
+    fn test_closure_value() {
+        let (sucker, sourcer) = StdSuck::<i32>::pair();
+
+        // Start producer
+        let producer_handle = std::thread::spawn(move || {
+            let counter = std::sync::Arc::new(std::sync::Mutex::new(0));
+            let counter_clone = std::sync::Arc::clone(&counter);
+            sourcer
+                .set(move || {
+                    let mut count = counter_clone.lock().unwrap();
+                    *count += 1;
+                    *count
+                })
+                .unwrap();
+            sourcer.run().unwrap();
+        });
+
+        // Ensure consumer gets the value
+        let value1 = sucker.get().unwrap();
+        assert_eq!(value1, 1);
+
+        // Ensure consumer gets the next value
+        let value2 = sucker.get().unwrap();
+        assert_eq!(value2, 2);
+
+        // Close consumer
+        sucker.close().unwrap();
+
+        producer_handle.join().unwrap();
+    }
+
+    #[test]
+    fn test_no_source_error() {
+        let (sucker, sourcer) = StdSuck::<i32>::pair();
+
+        // Start producer
+        let producer_handle = thread::spawn(move || {
+            sourcer.run().unwrap();
+        });
+
+        // Consumer should get NoSource error
+        let result = sucker.get();
+        assert!(matches!(result, Err(Error::NoSource)));
+
+        // Close consumer
+        sucker.close().unwrap();
+
+        producer_handle.join().unwrap();
+    }
+
+    #[test]
+    fn test_channel_closed_error() {
+        let (sucker, sourcer) = StdSuck::<i32>::pair();
+
+        // Start producer
+        let producer_handle = thread::spawn(move || {
+            sourcer.set_static(42).unwrap();
+            sourcer.run().unwrap();
+        });
+
+        // Close consumer
+        sucker.close().unwrap();
+
+        let result = sucker.get();
+        assert!(matches!(result, Err(Error::ChannelClosed)));
+
+        producer_handle.join().unwrap();
+    }
+
+    #[test]
+    fn test_producer_disconnection_error() {
+        let (sucker, sourcer) = StdSuck::<i32>::pair();
+
+        // Start producer
+        let producer_handle = thread::spawn(move || {
+            sourcer.set_static(42).unwrap();
+            // Simulate crash
+            panic!("Producer crashed!");
+        });
+
+        let result = sucker.get();
+        assert!(matches!(result, Err(Error::ProducerDisconnected)));
+
+        let _ = producer_handle.join();
+    }
+
+    #[test]
+    fn test_is_closed() {
+        let (sucker, sourcer) = StdSuck::<i32>::pair();
+
+        assert!(!sucker.is_closed());
+
+        // Start producer
+        let producer_handle = thread::spawn(move || {
+            sourcer.set_static(42).unwrap();
+            sourcer.run().unwrap();
+        });
+
+        // Get one value
+        let _ = sucker.get().unwrap();
+        assert!(!sucker.is_closed());
+
+        // Close and check
+        sucker.close().unwrap();
+
+        producer_handle.join().unwrap();
+    }
+}
+

src/sync/traits.rs

@@ -0,0 +1,23 @@
+pub use crate::error::Error as ChannelError;
+
+pub trait ChannelSender<T> {
+    fn send(&self, msg: T) -> Result<(), ChannelError>;
+}
+
+pub trait ChannelReceiver<T> {
+    fn recv(&self) -> Result<T, ChannelError>;
+}
+
+pub trait ChannelType {
+    type Sender<T>: ChannelSender<T>;
+    type Receiver<T>: ChannelReceiver<T>;
+
+    fn create_request_channel() -> (
+        Self::Sender<crate::types::Request>,
+        Self::Receiver<crate::types::Request>,
+    );
+    fn create_response_channel<T>() -> (
+        Self::Sender<crate::types::Response<T>>,
+        Self::Receiver<crate::types::Response<T>>,
+    );
+}

src/types.rs

@@ -12,14 +12,14 @@ pub enum Response<T> {
 }
 
 /// Represents the source of values: either static or dynamic
-pub enum ValueSource<T> {
+pub(crate) enum ValueSource<T> {
     Static(T),
     Dynamic(Box<dyn Fn() -> T + Send + Sync + 'static>),
     None,
 }
 
 /// Internal channel state shared between producer and consumer
-pub struct ChannelState<T> {
+pub(crate) struct ChannelState<T> {
-    pub source: ValueSource<T>,
+    pub(crate) source: ValueSource<T>,
-    pub closed: bool,
+    pub(crate) closed: bool,
 }