feat: make Unity integration optional

Runtime/IShrinkEventBusMainThreadDispatcher.cs

@@ -0,0 +1,12 @@
+#if UNITY_5_3_OR_NEWER
+using System;
+
+namespace ShrinkEventBus
+{
+    public interface IShrinkEventBusMainThreadDispatcher
+    {
+        bool IsMainThread { get; }
+        bool TryPost(Action action);
+    }
+}
+#endif

Runtime/IShrinkEventBusMainThreadDispatcher.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 9ff0b939fcee4292a6183fd899974c9c

Runtime/ShrinkBusSchedulers.cs

@@ -6,7 +6,11 @@ using System.Diagnostics;
 using System.Threading;
 using System.Threading.Tasks;
 using Cysharp.Threading.Tasks;
-using ShrinkSDK.Runtime;
+#if UNITY_5_3_OR_NEWER
+using MainThreadDispatcherContract = ShrinkEventBus.IShrinkEventBusMainThreadDispatcher;
+#else
+using MainThreadDispatcherContract = ShrinkSDK.Runtime.IShrinkMainThreadDispatcher;
+#endif
 
 namespace ShrinkEventBus
 {
@@ -208,7 +212,7 @@ namespace ShrinkEventBus
     internal sealed class ShrinkMainThreadScheduler : IShrinkBusScheduler
     {
         private readonly ShrinkSchedulerQueue _queue;
-        private readonly IShrinkMainThreadDispatcher _dispatcher;
+        private readonly MainThreadDispatcherContract _dispatcher;
         private int _pumpScheduled;
         private int _disposed;
 

Runtime/ShrinkEventBus.Runtime.asmdef

@@ -1,13 +1,12 @@
 {
-    "name": "ShrinkEventBus.Runtime",
-    "rootNamespace": "ShrinkEventBus",
-    "references": [
-        "UniTask",
-        "ShrinkRuntime.Abstractions"
-    ],
-    "includePlatforms": [],
-    "excludePlatforms": [],
-    "allowUnsafeCode": false,
-    "overrideReferences": false,
-    "autoReferenced": true
+  "name": "ShrinkEventBus.Runtime",
+  "rootNamespace": "ShrinkEventBus",
+  "references": [
+    "UniTask"
+  ],
+  "includePlatforms": [],
+  "excludePlatforms": [],
+  "allowUnsafeCode": false,
+  "overrideReferences": false,
+  "autoReferenced": true
 }

Runtime/ShrinkEventBusRuntime.cs

@@ -2,25 +2,29 @@
 
 using System;
 using System.Threading;
-using ShrinkSDK.Runtime;
+#if UNITY_5_3_OR_NEWER
+using MainThreadDispatcherContract = ShrinkEventBus.IShrinkEventBusMainThreadDispatcher;
+#else
+using MainThreadDispatcherContract = ShrinkSDK.Runtime.IShrinkMainThreadDispatcher;
+#endif
 
 namespace ShrinkEventBus
 {
     public static class ShrinkEventBusRuntime
     {
-        private static IShrinkMainThreadDispatcher _mainThreadDispatcher = CreateDefaultDispatcher();
+        private static MainThreadDispatcherContract _mainThreadDispatcher = CreateDefaultDispatcher();
 
-        public static IShrinkMainThreadDispatcher MainThreadDispatcher =>
+        public static MainThreadDispatcherContract MainThreadDispatcher =>
             Volatile.Read(ref _mainThreadDispatcher);
 
-        public static void ConfigureMainThreadDispatcher(IShrinkMainThreadDispatcher dispatcher)
+        public static void ConfigureMainThreadDispatcher(MainThreadDispatcherContract dispatcher)
         {
             if (dispatcher == null)
                 throw new ArgumentNullException(nameof(dispatcher));
             Volatile.Write(ref _mainThreadDispatcher, dispatcher);
         }
 
-        private static IShrinkMainThreadDispatcher CreateDefaultDispatcher()
+        private static MainThreadDispatcherContract CreateDefaultDispatcher()
         {
 #if UNITY_5_3_OR_NEWER
             return new ShrinkUnityMainThreadDispatcher();
@@ -33,7 +37,7 @@ namespace ShrinkEventBus
     }
 
 #if UNITY_5_3_OR_NEWER
-    internal sealed class ShrinkUnityMainThreadDispatcher : IShrinkMainThreadDispatcher
+    internal sealed class ShrinkUnityMainThreadDispatcher : MainThreadDispatcherContract
     {
         public bool IsMainThread => Cysharp.Threading.Tasks.PlayerLoopHelper.IsMainThread;
 
@@ -48,7 +52,7 @@ namespace ShrinkEventBus
         }
     }
 #else
-    internal sealed class ShrinkSynchronizationContextDispatcher : IShrinkMainThreadDispatcher
+    internal sealed class ShrinkSynchronizationContextDispatcher : MainThreadDispatcherContract
     {
         private readonly SynchronizationContext? _context;
         private readonly int _threadId;