Using memory arena in the game that supports hot reload

JulietApp/main.cpp

@@ -87,17 +87,16 @@ using namespace Juliet;
 
 namespace
 {
-    using GameInit_t     = void (*)(GameInitParams*);
     using GameShutdown_t = void (*)(void);
-    using GameUpdate_t   = void (*)(float deltaTime);
+    using GameUpdate_t   = void (*)(GameData* params, float deltaTime);
     struct GameFunctionTable
     {
-        GameInit_t     Init     = nullptr;
         GameShutdown_t Shutdown = nullptr;
         GameUpdate_t   Update   = nullptr;
     } Game;
+    GameData Data;
 
-    const char* GameFunctionTable[] = { "GameInit", "GameShutdown", "GameUpdate" };
+    const char* GameFunctionTable[] = { "GameShutdown", "GameUpdate" };
 
     LightID RedLightID  = 0;
     LightID BlueLightID = 0;
@@ -178,13 +177,7 @@ void JulietApplication::Init(NonNullPtr<Arena>)
         GameCode.FunctionCount = ArraySize(GameFunctionTable);
         GameCode.FunctionNames = GameFunctionTable;
         InitHotReloadCode(GameCode, ConstString("Game.dll"), ConstString("Game_Temp.dll"), ConstString("lock.tmp"));
-        if ((Running = GameCode.IsValid))
-        {
-            GameInitParams params;
-            params.GameArena = GameArena = ArenaAllocate({} JULIET_DEBUG_ONLY(, "Game Arena"));
-            params.ScratchArena = GameScratchArena = ArenaAllocate({} JULIET_DEBUG_ONLY(, "Scratch Arena"));
-            Game.Init(&params);
-        }
+        Running = GameCode.IsValid;
     }
 }
 
@@ -429,8 +422,6 @@ void JulietApplication::Update()
     ImGui::End();
 #endif
 
-    ArenaClear(GameScratchArena);
-
     Vector3 redLightPos  = { 5.0f, 5.0f, 2.0f };
     Vector3 blueLightPos = { -5.0f, 0.0f, 2.0f };
 
@@ -497,7 +488,7 @@ void JulietApplication::Update()
     DebugDisplay_DrawSphere(blueLightPos, 0.5f, { 0.0f, 0.0f, 1.0f, 1.0f }, true);
     DebugDisplay_DrawSphere(redLightPos, 0.5f, { 1.0f, 0.0f, 0.0f, 1.0f }, true);
 
-    Game.Update(0.0f);
+    Game.Update(&Data, 0.0f);
 
     if (ShouldReloadCode(GameCode))
     {
@@ -545,8 +536,6 @@ void JulietApplication::Update()
         Debug::DebugDrawMemoryArena();
 #endif
     }
-
-    ArenaClear(GameScratchArena);
 }
 
 void JulietApplication::OnPreRender(CommandList* /*cmd*/) {}

JulietApp/main.h

@@ -43,8 +43,6 @@ class JulietApplication : public Juliet::IApplication
     Juliet::HotReloadCode     GameCode         = {};
     Juliet::GraphicsPipeline* GraphicsPipeline = {};
     Juliet::Texture*          DepthBuffer      = {};
-    Juliet::Arena*            GameArena        = nullptr;
-    Juliet::Arena*            GameScratchArena = nullptr;
 
     int   AutoCloseFrameCount = -1;
     bool  Running             = false;