feat(ecs): add stats sole containing current tick

2 files changed, 33 insertions, 1 deletions

diff --git a/ecs/src/lib.rs b/ecs/src/lib.rs
index 40b2021..452f657 100644
--- a/ecs/src/lib.rs
+++ b/ecs/src/lib.rs
@@ -23,6 +23,7 @@ use crate::extension::{Collector as ExtensionCollector, Extension};
 use crate::lock::{Lock, WriteGuard};
 use crate::query::options::Options as QueryOptions;
 use crate::sole::Sole;
+use crate::stats::Stats;
 use crate::system::{System, TypeErased as TypeErasedSystem};
 use crate::tuple::Reduce as TupleReduce;
 use crate::type_name::TypeName;
@@ -36,6 +37,7 @@ pub mod lock;
 pub mod query;
 pub mod relationship;
 pub mod sole;
+pub mod stats;
 pub mod system;
 pub mod tuple;
 pub mod type_name;
@@ -60,7 +62,13 @@ impl World
     #[must_use]
     pub fn new() -> Self
     {
-        Self::default()
+        let mut world = Self::default();
+
+        world
+            .add_sole(Stats::default())
+            .expect("World already has stats sole");
+
+        world
     }
 
     /// Creates a new entity with the given components.
@@ -267,6 +275,20 @@ impl World
             if self.stop.load(Ordering::Relaxed) {
                 break;
             }
+
+            let mut stats_lock = self
+                .data
+                .sole_storage
+                .get::<Stats>()
+                .expect("No stats sole found")
+                .write_nonblock()
+                .expect("Failed to aquire read-write stats sole lock");
+
+            let stats = stats_lock
+                .downcast_mut::<Stats>()
+                .expect("Casting stats sole to Stats type failed");
+
+            stats.current_tick += 1;
         }
     }
 
diff --git a/ecs/src/stats.rs b/ecs/src/stats.rs
new file mode 100644
index 0000000..410610f
--- /dev/null
+++ b/ecs/src/stats.rs
@@ -0,0 +1,10 @@
+use ecs_macros::Sole;
+
+use crate as ecs;
+
+#[derive(Debug, Default, Sole)]
+#[non_exhaustive]
+pub struct Stats
+{
+    pub current_tick: u64,
+}