1 files changed, 172 insertions, 0 deletions
diff --git a/src/private/castable_factory/threadsafe.rs b/src/private/castable_factory/threadsafe.rs
new file mode 100644
index 0000000..3d2b653
--- /dev/null
+++ b/src/private/castable_factory/threadsafe.rs
@@ -0,0 +1,172 @@
+use std::any::type_name;
+use std::fmt::Debug;
+use std::marker::Tuple;
+
+use crate::private::any_factory::{AnyFactory, AnyThreadsafeFactory};
+use crate::private::factory::IThreadsafeFactory;
+use crate::ptr::TransientPtr;
+
+pub struct ThreadsafeCastableFactory<Args, ReturnInterface>
+where
+    Args: Tuple + 'static,
+    ReturnInterface: 'static + ?Sized,
+{
+    func: &'static (dyn Fn<Args, Output = TransientPtr<ReturnInterface>> + Send + Sync),
+}
+
+impl<Args, ReturnInterface> ThreadsafeCastableFactory<Args, ReturnInterface>
+where
+    Args: Tuple + 'static,
+    ReturnInterface: 'static + ?Sized,
+{
+    pub fn new(
+        func: &'static (dyn Fn<Args, Output = TransientPtr<ReturnInterface>>
+                      + Send
+                      + Sync),
+    ) -> Self
+    {
+        Self { func }
+    }
+}
+
+impl<Args, ReturnInterface> IThreadsafeFactory<Args, ReturnInterface>
+    for ThreadsafeCastableFactory<Args, ReturnInterface>
+where
+    Args: Tuple + 'static,
+    ReturnInterface: 'static + ?Sized,
+{
+}
+
+impl<Args, ReturnInterface> Fn<Args> for ThreadsafeCastableFactory<Args, ReturnInterface>
+where
+    Args: Tuple + 'static,
+    ReturnInterface: 'static + ?Sized,
+{
+    extern "rust-call" fn call(&self, args: Args) -> Self::Output
+    {
+        self.func.call(args)
+    }
+}
+
+impl<Args, ReturnInterface> FnMut<Args>
+    for ThreadsafeCastableFactory<Args, ReturnInterface>
+where
+    Args: Tuple + 'static,
+    ReturnInterface: 'static + ?Sized,
+{
+    extern "rust-call" fn call_mut(&mut self, args: Args) -> Self::Output
+    {
+        self.call(args)
+    }
+}
+
+impl<Args, ReturnInterface> FnOnce<Args>
+    for ThreadsafeCastableFactory<Args, ReturnInterface>
+where
+    Args: Tuple + 'static,
+    ReturnInterface: 'static + ?Sized,
+{
+    type Output = TransientPtr<ReturnInterface>;
+
+    extern "rust-call" fn call_once(self, args: Args) -> Self::Output
+    {
+        self.call(args)
+    }
+}
+
+impl<Args, ReturnInterface> AnyFactory
+    for ThreadsafeCastableFactory<Args, ReturnInterface>
+where
+    Args: Tuple + 'static,
+    ReturnInterface: 'static + ?Sized,
+{
+}
+
+impl<Args, ReturnInterface> AnyThreadsafeFactory
+    for ThreadsafeCastableFactory<Args, ReturnInterface>
+where
+    Args: Tuple + 'static,
+    ReturnInterface: 'static + ?Sized,
+{
+}
+
+impl<Args, ReturnInterface> Debug for ThreadsafeCastableFactory<Args, ReturnInterface>
+where
+    Args: Tuple + 'static,
+    ReturnInterface: 'static + ?Sized,
+{
+    #[cfg(not(tarpaulin_include))]
+    fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result
+    {
+        let mut args = type_name::<Args>();
+
+        if args.len() < 2 {
+            return Err(std::fmt::Error::default());
+        }
+
+        args = args
+            .get(1..args.len() - 1)
+            .map_or_else(|| Err(std::fmt::Error::default()), Ok)?;
+
+        if args.ends_with(',') {
+            args = args
+                .get(..args.len() - 1)
+                .map_or_else(|| Err(std::fmt::Error), Ok)?;
+        }
+
+        let ret = type_name::<TransientPtr<ReturnInterface>>();
+
+        formatter.write_fmt(format_args!(
+            "ThreadsafeCastableFactory ({}) -> {}",
+            args, ret
+        ))
+    }
+}
+
+#[cfg(test)]
+mod tests
+{
+    use super::*;
+
+    #[derive(Debug, PartialEq, Eq)]
+    struct Bacon
+    {
+        heal_amount: u32,
+    }
+
+    #[test]
+    fn can_call()
+    {
+        let castable_factory = ThreadsafeCastableFactory::new(&|heal_amount| {
+            TransientPtr::new(Bacon { heal_amount })
+        });
+
+        let output = castable_factory.call((27,));
+
+        assert_eq!(output, TransientPtr::new(Bacon { heal_amount: 27 }));
+    }
+
+    #[test]
+    fn can_call_mut()
+    {
+        let mut castable_factory = ThreadsafeCastableFactory::new(&|heal_amount| {
+            TransientPtr::new(Bacon { heal_amount })
+        });
+
+        let output = castable_factory.call_mut((1092,));
+
+        assert_eq!(output, TransientPtr::new(Bacon { heal_amount: 1092 }));
+    }
+
+    #[test]
+    fn can_call_once()
+    {
+        let castable_factory = ThreadsafeCastableFactory::new(&|heal_amount| {
+            TransientPtr::new(Bacon { heal_amount })
+        });
+
+        let output = castable_factory.call_once((547,));
+
+        assert_eq!(output, TransientPtr::new(Bacon { heal_amount: 547 }));
+    }
+}