!10378 [lite] rollback model.h

From: @xu_anyue
Reviewed-by: @hangangqiang,@zhanghaibo5
Signed-off-by: @hangangqiang

mindspore/lite/include/model.h

@@ -55,6 +55,9 @@ struct MS_API Model {
   /// \brief Free meta graph temporary buffer
   virtual void Free() = 0;
 
+  /// \brief Free all temporay buffer.EG: nodes in the model.
+  virtual void Destroy() = 0;
+
   /// \brief Model destruct, free all memory
   virtual ~Model() = default;
 };

mindspore/lite/src/lite_model.cc

@@ -101,7 +101,7 @@ void LiteModel::Free() {
   attr_tensor_bufs_.resize(0);
 }
 
-LiteModel::~LiteModel() {
+void LiteModel::Destroy() {
   Free();
   auto nodes_size = this->all_nodes_.size();
   for (size_t i = 0; i < nodes_size; ++i) {

mindspore/lite/src/lite_model.h

@@ -42,7 +42,9 @@ class LiteModel : public Model {
 
   void Free() override;
 
-  ~LiteModel() override;
+  void Destroy() override;
+
+  ~LiteModel() override { Destroy(); }
 
  private:
 #ifdef ENABLE_V0