feat(godot-ffi): stub is_main_thread() for wasm_nothread

Author: goatfryed

godot-core/src/task/async_runtime.rs

@@ -95,7 +95,6 @@ pub fn spawn(future: impl Future<Output = ()> + 'static) -> TaskHandle {
     // By limiting async tasks to the main thread we can redirect all signal callbacks back to the main thread via `call_deferred`.
     //
     // Once thread-safe futures are possible the restriction can be lifted.
-    #[cfg(not(wasm_nothreads))]
     assert!(
         crate::init::is_main_thread(),
         "godot_task() can only be used on the main thread"

godot-ffi/src/lib.rs

@@ -435,9 +435,17 @@ pub fn main_thread_id() -> std::thread::ThreadId {
 ///
 /// # Panics
 /// - If it is called before the engine bindings have been initialized.
-#[cfg(not(wasm_nothreads))]
+///
 pub fn is_main_thread() -> bool {
-    std::thread::current().id() == main_thread_id()
+    #[cfg(not(wasm_nothreads))]
+    {
+        std::thread::current().id() == main_thread_id()
+    }
+
+    #[cfg(wasm_nothreads)]
+    {
+        true
+    }
 }
 
 // ----------------------------------------------------------------------------------------------------------------------------------------------