pipe through left-over OS events to subsequent frames; do not drop them

src/os/gfx/os_gfx.c

@@ -189,3 +189,35 @@ os_text(OS_EventList *events, OS_Handle window, U32 character)
   }
   return result;
 }
+
+internal OS_EventList
+os_event_list_copy(Arena *arena, OS_EventList *src)
+{
+  OS_EventList dst = {0};
+  for(OS_Event *s = src->first; s != 0; s = s->next)
+  {
+    OS_Event *d = push_array(arena, OS_Event, 1);
+    MemoryCopyStruct(d, s);
+    d->strings = str8_list_copy(arena, &s->strings);
+    DLLPushBack(dst.first, dst.last, d);
+    dst.count += 1;
+  }
+  return dst;
+}
+
+internal void
+os_event_list_concat_in_place(OS_EventList *dst, OS_EventList *to_push)
+{
+  if(dst->last && to_push->first)
+  {
+    dst->last->next = to_push->first;
+    to_push->first->prev = dst->last;
+    dst->last = to_push->last;
+    dst->count += to_push->count;
+  }
+  else if(!dst->last && to_push->first)
+  {
+    MemoryCopyStruct(dst, to_push);
+  }
+  MemoryZeroStruct(to_push);
+}

src/os/gfx/os_gfx.h

@@ -92,6 +92,8 @@ internal void os_eat_event(OS_EventList *events, OS_Event *event);
 internal B32  os_key_press(OS_EventList *events, OS_Handle window, OS_EventFlags flags, OS_Key key);
 internal B32  os_key_release(OS_EventList *events, OS_Handle window, OS_EventFlags flags, OS_Key key);
 internal B32  os_text(OS_EventList *events, OS_Handle window, U32 character);
+internal OS_EventList os_event_list_copy(Arena *arena, OS_EventList *src);
+internal void os_event_list_concat_in_place(OS_EventList *dst, OS_EventList *to_push);
 
 ////////////////////////////////
 //~ rjf: @os_hooks Main Initialization API (Implemented Per-OS)

src/os/gfx/win32/os_gfx_win32.c

@@ -114,6 +114,7 @@ w32_push_event(OS_EventKind kind, W32_Window *window)
   result->kind = kind;
   result->window = os_window_from_w32_window(window);
   result->flags = os_get_event_flags();
+  w32_event_list.count += 1;
   return(result);
 }