wgi: refcount the delegate objects

assert if calls become unbalanced.

src/joystick/windows/SDL_windows_gaming_input.c

@@ -22,6 +22,8 @@
 
 #ifdef SDL_JOYSTICK_WGI
 
+#include "SDL_assert.h"
+#include "SDL_atomic.h"
 #include "SDL_endian.h"
 #include "SDL_events.h"
 #include "../SDL_sysjoystick.h"
@@ -207,6 +209,11 @@ SDL_IsXInputDevice(Uint16 vendor, Uint16 product)
     return SDL_FALSE;
 }
 
+typedef struct RawGameControllerDelegate {
+    __FIEventHandler_1_Windows__CGaming__CInput__CRawGameController *vtbl;
+    SDL_atomic_t refcount;
+} RawGameControllerDelegate;
+
 static HRESULT STDMETHODCALLTYPE IEventHandler_CRawGameControllerVtbl_QueryInterface(__FIEventHandler_1_Windows__CGaming__CInput__CRawGameController * This, REFIID riid, void **ppvObject)
 {
     if (!ppvObject) {
@@ -216,9 +223,10 @@ static HRESULT STDMETHODCALLTYPE IEventHandler_CRawGameControllerVtbl_QueryInter
     *ppvObject = NULL;
     if (WIN_IsEqualIID(riid, &IID_IUnknown) || WIN_IsEqualIID(riid, &IID_IAgileObject) || WIN_IsEqualIID(riid, &IID_IEventHandler_RawGameController)) {
         *ppvObject = This;
+        __x_ABI_CWindows_CGaming_CInput_CIRawGameControllerStatics_AddRef(This);
         return S_OK;
     } else if (WIN_IsEqualIID(riid, &IID_IMarshal)) {
-        // This seems complicated. Let's hope it doesn't happen.
+        /* This seems complicated. Let's hope it doesn't happen. */
         return E_OUTOFMEMORY;
     } else {
         return E_NOINTERFACE;
@@ -227,12 +235,17 @@ static HRESULT STDMETHODCALLTYPE IEventHandler_CRawGameControllerVtbl_QueryInter
 
 static ULONG STDMETHODCALLTYPE IEventHandler_CRawGameControllerVtbl_AddRef(__FIEventHandler_1_Windows__CGaming__CInput__CRawGameController * This)
 {
-    return 1;
+    RawGameControllerDelegate *self = (RawGameControllerDelegate *)This;
+    return SDL_AtomicAdd(&self->refcount, 1) + 1;
 }
 
 static ULONG STDMETHODCALLTYPE IEventHandler_CRawGameControllerVtbl_Release(__FIEventHandler_1_Windows__CGaming__CInput__CRawGameController * This)
 {
-    return 1;
+    RawGameControllerDelegate *self = (RawGameControllerDelegate *)This;
+    int rc = SDL_AtomicAdd(&self->refcount, -1) - 1;
+    /* Should never free the static delegate objects */
+    SDL_assert(rc > 0);
+    return rc;
 }
 
 static HRESULT STDMETHODCALLTYPE IEventHandler_CRawGameControllerVtbl_InvokeAdded(__FIEventHandler_1_Windows__CGaming__CInput__CRawGameController * This, IInspectable *sender, __x_ABI_CWindows_CGaming_CInput_CIRawGameController *e)
@@ -417,8 +430,9 @@ static __FIEventHandler_1_Windows__CGaming__CInput__CRawGameControllerVtbl contr
     IEventHandler_CRawGameControllerVtbl_Release,
     IEventHandler_CRawGameControllerVtbl_InvokeAdded
 };
-static __FIEventHandler_1_Windows__CGaming__CInput__CRawGameController controller_added = {
-    &controller_added_vtbl
+static RawGameControllerDelegate controller_added = {
+    { &controller_added_vtbl },
+    { 1 }
 };
 
 static __FIEventHandler_1_Windows__CGaming__CInput__CRawGameControllerVtbl controller_removed_vtbl = {
@@ -427,8 +441,9 @@ static __FIEventHandler_1_Windows__CGaming__CInput__CRawGameControllerVtbl contr
     IEventHandler_CRawGameControllerVtbl_Release,
     IEventHandler_CRawGameControllerVtbl_InvokeRemoved
 };
-static __FIEventHandler_1_Windows__CGaming__CInput__CRawGameController controller_removed = {
-    &controller_removed_vtbl
+static RawGameControllerDelegate controller_removed = {
+    { &controller_removed_vtbl },
+    { 1 }
 };
 
 static int