Removed use of std::exit and changed recomp runtime to exit normally, added helpers for getting recompiled args and returning values, added example of patch code calling native code

include/recomp_helpers.h

@@ -0,0 +1,46 @@
+#ifndef __RECOMP_HELPERS__
+#define __RECOMP_HELPERS__
+
+#include "recomp.h"
+
+template<int index, typename T>
+T _arg(uint8_t* rdram, recomp_context* ctx) {
+    static_assert(index < 4, "Only args 0 through 3 supported");
+    gpr raw_arg = (&ctx->r4)[index];
+    if constexpr (std::is_same_v<T, float>) {
+        if constexpr (index < 2) {
+            static_assert(index != 1, "Floats in arg 1 not supported");
+            return ctx->f12.fl;
+        }
+        else {
+            return std::bit_cast<T>(raw_arg);
+        }
+    }
+    else if constexpr (std::is_pointer_v<T>) {
+        static_assert (!std::is_pointer_v<std::remove_pointer_t<T>>, "Double pointers not supported");
+        return TO_PTR(std::remove_pointer_t<T>, raw_arg);
+    }
+    else if constexpr (std::is_integral_v<T>) {
+        static_assert(sizeof(T) <= 4, "64-bit args not supported");
+        return static_cast<T>(raw_arg);
+    }
+    else {
+        // static_assert in else workaround
+        [] <bool flag = false>() {
+            static_assert(flag, "Unsupported type");
+        }();
+    }
+}
+
+template <typename T>
+void _return(recomp_context* ctx, T val) {
+    static_assert(sizeof(T) <= 4 && "Only 32-bit value returns supported currently");
+    if (std::is_same_v<T, float>) {
+        ctx->f0.fl = val;
+    }
+    else if (std::is_integral_v<T> && sizeof(T) <= 4) {
+        ctx->r2 = int32_t(val);
+    }
+}
+
+#endif

include/recomp_ui.h

@@ -21,5 +21,6 @@ enum class Menu {
 };
 
 void set_current_menu(Menu menu);
+void destroy_ui();
 
 #endif

include/rt64_layer.h

@@ -76,6 +76,7 @@ DLLIMPORT void ProcessRDPList(void);
 DLLIMPORT void ProcessDList(void);
 DLLIMPORT void UpdateScreen(void);
 DLLIMPORT void ChangeWindow(void);
+DLLIMPORT void PluginShutdown(void);
 
 void set_rt64_hooks();