[Kernel] nonintrusive guest to host object mapping

src/xenia/kernel/util/kernel_fwd.h

@@ -17,9 +17,7 @@ struct XAPC;
 
 struct X_KPCR;
 struct X_KTHREAD;
-struct X_OBJECT_HEADER;
 struct X_OBJECT_CREATE_INFORMATION;
-struct X_OBJECT_TYPE;
 
 }  // namespace xe::kernel
 

src/xenia/kernel/util/object_table.cc

@@ -479,6 +479,31 @@ X_STATUS ObjectTable::RestoreHandle(X_HANDLE handle, XObject* object) {
   return X_STATUS_SUCCESS;
 }
 
+void ObjectTable::MapGuestObjectToHostHandle(uint32_t guest_object,
+                                             X_HANDLE host_handle) {
+  auto global_lock = global_critical_region_.Acquire();
+  guest_to_host_handle_[guest_object] = host_handle;
+}
+bool ObjectTable::HostHandleForGuestObject(uint32_t guest_object, X_HANDLE& out) {
+  auto global_lock = global_critical_region_.Acquire();
+  auto gobj_iter = guest_to_host_handle_.find(guest_object);
+  if (gobj_iter == guest_to_host_handle_.end()) {
+    return false;
+  }
+  out = gobj_iter->second;
+  return true;
+}
+
+void ObjectTable::UnmapGuestObjectHostHandle(uint32_t guest_object) {
+  auto global_lock = global_critical_region_.Acquire();
+  auto iter = guest_to_host_handle_.find(guest_object);
+  if (iter == guest_to_host_handle_.end()) {
+    return;
+  } else {
+    guest_to_host_handle_.erase(iter);
+  }
+}
+
 }  // namespace util
 }  // namespace kernel
 }  // namespace xe

src/xenia/kernel/util/object_table.h

@@ -80,6 +80,9 @@ class ObjectTable {
   std::vector<object_ref<XObject>> GetAllObjects();
   void PurgeAllObjects();  // Purges the object table of all guest objects
 
+  void MapGuestObjectToHostHandle(uint32_t guest_object, X_HANDLE host_handle);
+  void UnmapGuestObjectHostHandle(uint32_t guest_object);
+  bool HostHandleForGuestObject(uint32_t guest_object, X_HANDLE& out);
  private:
   struct ObjectTableEntry {
     int handle_ref_count = 0;
@@ -107,6 +110,7 @@ class ObjectTable {
   uint32_t last_free_entry_ = 0;
   uint32_t last_free_host_entry_ = 0;
   std::unordered_map<string_key_case, X_HANDLE> name_table_;
+  std::unordered_map<uint32_t, X_HANDLE> guest_to_host_handle_;
 };
 
 // Generic lookup