[core] Tensor::data member preserve constness of tensor

samples/cpp/benchmark_app/inputs_filling.cpp

@@ -1015,6 +1015,7 @@ void copy_tensor_data(ov::Tensor& dst, const ov::Tensor& src) {
         throw std::runtime_error(
             "Source and destination tensors shapes and byte sizes are expected to be equal for data copying.");
     }
-
-    memcpy(dst.data(), src.data(), src.get_byte_size());
+    OPENVINO_SUPPRESS_DEPRECATED_START  // keep until 2026.0 release
+        memcpy(dst.data(), src.data(), src.get_byte_size());
+    OPENVINO_SUPPRESS_DEPRECATED_END  // keep until 2026.0 release
 }

samples/cpp/common/utils/include/samples/classification_results.h

@@ -66,8 +66,11 @@ class ClassificationResult {
 
         for (size_t i = 0; i < batchSize; i++) {
             const size_t offset = i * (input.get_size() / batchSize);
-            const T* batchData = input.data<const T>();
-            batchData += offset;
+            OPENVINO_SUPPRESS_DEPRECATED_START  // keep until 2026.0 release
+                const T* batchData = input.data<T>();
+            OPENVINO_SUPPRESS_DEPRECATED_END  // keep until 2026.0 release
+
+                batchData += offset;
 
             std::iota(std::begin(indexes), std::end(indexes), 0);
             std::partial_sort(std::begin(indexes),

samples/cpp/model_creation_sample/main.cpp

@@ -77,10 +77,13 @@ ov::Tensor read_weights(const std::string& filepath) {
  */
 std::shared_ptr<ov::Model> create_model(const std::string& path_to_weights) {
     const ov::Tensor weights = read_weights(path_to_weights);
-    const std::uint8_t* data = weights.data<std::uint8_t>();
+    OPENVINO_SUPPRESS_DEPRECATED_START  // keep until 2026.0 release
+        const std::uint8_t* data = weights.data<std::uint8_t>();
+    OPENVINO_SUPPRESS_DEPRECATED_END  // keep until 2026.0 release
 
-    // -------input------
-    std::vector<ptrdiff_t> padBegin{0, 0};
+        // -------input------
+        std::vector<ptrdiff_t>
+            padBegin{0, 0};
     std::vector<ptrdiff_t> padEnd{0, 0};
 
     auto paramNode = std::make_shared<ov::opset13::Parameter>(ov::element::Type_t::f32, ov::Shape({64, 1, 28, 28}));

src/core/dev_api/openvino/runtime/itensor.hpp

@@ -51,24 +51,32 @@ class OPENVINO_API ITensor : public std::enable_shared_from_this<ITensor> {
     virtual const ov::Strides& get_strides() const = 0;
 
     /**
-     * @brief Provides an access to the underlaying host memory
+     * @brief Provides an access to the underlying host memory
      * @param type Optional type parameter.
      * @note If type parameter is specified, the method throws an exception
      * if specified type's fundamental type does not match with tensor element type's fundamental type
      * @return A host pointer to tensor memory
+     * @{
      */
-    virtual void* data(const element::Type& type = {}) const = 0;
+    virtual void* data(const element::Type& type = {});
+    virtual const void* data(const element::Type& type = {}) const = 0;
+    /// @}
 
     /**
-     * @brief Provides an access to the underlaying host memory casted to type `T`
+     * @brief Provides an access to the underlying host memory casted to type `T`
      * @return A host pointer to tensor memory casted to specified type `T`.
      * @note Throws exception if specified type does not match with tensor element type
      */
     template <typename T, typename datatype = typename std::decay<T>::type>
-    T* data() const {
+    T* data() {
         return static_cast<T*>(data(element::from<datatype>()));
     }
 
+    template <typename T, typename datatype = typename std::decay<T>::type>
+    const T* data() const {
+        return static_cast<const T*>(data(element::from<datatype>()));
+    }
+
     /**
      * @brief Reports whether the tensor is continuous or not
      *

src/core/include/openvino/runtime/tensor.hpp

@@ -121,6 +121,17 @@ class OPENVINO_API Tensor {
      */
     Tensor(const element::Type& type, const Shape& shape, void* host_ptr, const Strides& strides = {});
 
+    /**
+     * @brief Constructs Tensor using element type and shape. Wraps allocated host memory as read only.
+     * @note Does not perform memory allocation internally
+     * @param type Tensor element type
+     * @param shape Tensor shape
+     * @param host_ptr Pointer to pre-allocated host memory with initialized objects
+     * @param strides Optional strides parameters in bytes. Strides are supposed to be computed automatically based
+     * on shape and element size
+     */
+    Tensor(const element::Type& type, const Shape& shape, const void* host_ptr, const Strides& strides = {});
+
     /**
      * @brief Constructs Tensor using port from node. Allocate internal host storage using default allocator
      * @param port port from node
@@ -138,6 +149,16 @@ class OPENVINO_API Tensor {
      */
     Tensor(const ov::Output<const ov::Node>& port, void* host_ptr, const Strides& strides = {});
 
+    /**
+     * @brief Constructs Tensor using port from node. Wraps allocated host memory as read only.
+     * @note Does not perform memory allocation internally
+     * @param port port from node
+     * @param host_ptr Pointer to pre-allocated host memory with initialized objects
+     * @param strides Optional strides parameters in bytes. Strides are supposed to be computed automatically based
+     * on shape and element size
+     */
+    Tensor(const ov::Output<const ov::Node>& port, const void* host_ptr, const Strides& strides = {});
+
     /**
      * @brief Constructs region of interest (ROI) tensor form another tensor.
      * @note Does not perform memory allocation internally
@@ -197,23 +218,48 @@ class OPENVINO_API Tensor {
     Strides get_strides() const;
 
     /**
-     * @brief Provides an access to the underlaying host memory
+     * @brief Provides an access to the underlying host memory
      * @param type Optional type parameter.
      * @note If type parameter is specified, the method throws an exception
      * if specified type's fundamental type does not match with tensor element type's fundamental type
      * @return A host pointer to tensor memory
+     * @{
      */
+#ifndef IN_OV_COMPONENT
+    OPENVINO_DEPRECATED("This function will return const void* in 2026.0. Check if used correctly")
+#endif
     void* data(const element::Type& type = {}) const;
+    void* data(const element::Type& type = {});
+    /// @}
 
     /**
-     * @brief Provides an access to the underlaying host memory casted to type `T`
+     * @brief Provides an access to the underlying host memory casted to type `T`
      * @return A host pointer to tensor memory casted to specified type `T`.
      * @note Throws exception if specified type does not match with tensor element type
+     * @{
      */
-    template <typename T, typename datatype = typename std::decay<T>::type>
+    template <typename T, typename datatype = std::decay_t<T>>
+#ifndef IN_OV_COMPONENT
+    OPENVINO_DEPRECATED("This function will return const T* in 2026.0. Check if used correctly")
+#endif
     T* data() const {
-        return static_cast<T*>(data(element::from<datatype>()));
+        OPENVINO_SUPPRESS_DEPRECATED_START  // keep until 2026.0 release
+            return static_cast<T*>(data(element::from<datatype>()));
+        OPENVINO_SUPPRESS_DEPRECATED_END  // keep until 2026.0 release
+    }
+
+    template <typename T, typename datatype = std::decay_t<T>>
+    T* data() {
+        if constexpr (std::is_const_v<T>) {
+            OPENVINO_SUPPRESS_DEPRECATED_START  // keep until 2026.0 release
+                return std::as_const(*this)
+                    .data<T>();
+            OPENVINO_SUPPRESS_DEPRECATED_END  // keep until 2026.0 release
+        } else {
+            return static_cast<T*>(data(element::from<datatype>()));
+        }
     }
+    /// @}
 
     /**
      * @brief Checks if current Tensor object is not initialized
@@ -234,7 +280,7 @@ class OPENVINO_API Tensor {
      * @return true if this object can be dynamically cast to the type const T*. Otherwise, false
      */
     template <typename T>
-    typename std::enable_if<std::is_base_of<Tensor, T>::value, bool>::type is() const noexcept {
+    std::enable_if_t<std::is_base_of_v<Tensor, T>, bool> is() const noexcept {
         try {
             T::type_check(*this);
         } catch (...) {
@@ -250,7 +296,7 @@ class OPENVINO_API Tensor {
      * @return T object
      */
     template <typename T>
-    const typename std::enable_if<std::is_base_of<Tensor, T>::value, T>::type as() const {
+    const std::enable_if_t<std::is_base_of_v<Tensor, T>, T> as() const {
         T::type_check(*this);
         return *static_cast<const T*>(this);
     }

src/core/reference/include/openvino/reference/interpolate.hpp

@@ -653,7 +653,7 @@ void interpolate(const T* input_data,
 }
 
 template <typename T>
-void interpolate(T* input_data,
+void interpolate(const T* input_data,
                  const PartialShape& input_data_shape,
                  T* out,
                  const Shape& out_shape,
@@ -667,7 +667,7 @@ void interpolate(T* input_data,
     size_t bytes_in_padded_input = shape_size(padded_input_shape) * sizeof(T);
     std::vector<uint8_t> padded_input_data(bytes_in_padded_input, 0);
     uint8_t* padded_data_ptr = padded_input_data.data();
-    pad_input_data(reinterpret_cast<uint8_t*>(input_data),
+    pad_input_data(reinterpret_cast<const uint8_t*>(input_data),
                    padded_data_ptr,
                    sizeof(T),
                    input_data_shape.to_shape(),

src/core/reference/include/openvino/reference/mvn.hpp

@@ -89,7 +89,7 @@ void mvn_6(const T* arg,
 
 template <typename T>
 AxisSet mvn_6_reduction_axes(const ov::Tensor& axes_input, size_t rank) {
-    T* a = axes_input.data<T>();
+    const T* a = axes_input.data<T>();
     auto v = std::vector<T>(a, a + axes_input.get_shape()[0]);
     std::vector<size_t> axes(v.size(), 0);
     for (size_t i = 0; i < v.size(); i++) {

src/core/reference/src/op/loop.cpp

@@ -113,7 +113,7 @@ void loop(const std::shared_ptr<Model>& func,
                     pointers_to_data[slice_desc->m_stride > 0 ? j : (pointers_to_data.size() - j - 1)] =
                         static_cast<char*>(sliced_values[slice_in_idx][j].data());
                 }
-                reference::split(static_cast<char*>(args[slice_desc->m_input_index].data()),
+                reference::split(static_cast<const char*>(args[slice_desc->m_input_index].data()),
                                  args[slice_desc->m_input_index].get_shape(),
                                  el_size,
                                  slice_desc->m_axis,
@@ -211,7 +211,7 @@ void loop(const std::shared_ptr<Model>& func,
             std::vector<const char*> pointers_on_values;
             pointers_on_values.reserve(values_to_concat[i].size());
             for (const auto& vec : values_to_concat[i]) {
-                pointers_on_values.push_back(static_cast<char*>(vec.data()));
+                pointers_on_values.push_back(static_cast<const char*>(vec.data()));
             }
             reference::concat(pointers_on_values,
                               static_cast<char*>(out[concat_desc->m_output_index].data()),

src/core/reference/src/op/tensor_iterator.cpp

@@ -64,7 +64,7 @@ void tensor_iterator(uint64_t num_iterations,
                 pointers_to_data[slice_desc->m_stride > 0 ? j : (pointers_to_data.size() - j - 1)] =
                     static_cast<char*>(sliced_values[slice_in_idx][j].data());
             }
-            reference::split(static_cast<char*>(args[slice_desc->m_input_index].data()),
+            reference::split(static_cast<const char*>(args[slice_desc->m_input_index].data()),
                              args[slice_desc->m_input_index].get_shape(),
                              el_size,
                              slice_desc->m_axis,

src/core/src/bound_evaluate.cpp

@@ -453,7 +453,7 @@ bool ov::interval_bound_evaluator(const Node* node,
                node->evaluate(lower_output_values, *input_variants.begin());
 
     auto zero = op::v0::Constant::create(element::i64, {1}, {0});
-    const auto zero_t = ov::Tensor(element::i64, Shape{});
+    auto zero_t = ov::Tensor(element::i64, Shape{});
     *zero_t.data<int64_t>() = 0;
 
     std::vector<TensorVector> unsqueezed_output_variants;
@@ -529,8 +529,8 @@ bool ov::interval_bound_evaluator(const Node* node,
             fully_defined = false;
         } else {
             // Can not set to make_tensor_of_min_value(lower_output_values[i]->get_element_type()) yet
-            const auto then = Tensor{lower_out[0].get_element_type(), Shape{}};
-            const auto then_data = static_cast<char*>(then.data());
+            auto then = Tensor{lower_out[0].get_element_type(), Shape{}};
+            auto then_data = static_cast<char*>(then.data());
             std::memset(then_data, 0, then.get_byte_size());
             op::v1::Select().evaluate(lower_out, {final_input_dyn_mask, then, lower_out[0]});
             node->get_output_tensor(i).set_lower_value(lower_out[0]);

src/core/src/op/constant.cpp

@@ -207,8 +207,10 @@ Constant::Constant(const Tensor& tensor)
     : m_element_type{tensor.get_element_type()},
       m_shape{tensor.get_shape()},
       m_byte_strides{m_element_type.bitwidth() >= 8 ? tensor.get_strides() : Strides{}},
-      m_data{
-          std::make_shared<SharedBuffer<Tensor>>(static_cast<char*>(tensor.data()), tensor.get_byte_size(), tensor)} {
+      // cast is for internal use only to store tensor data in shared buffer (not for modification)
+      m_data{std::make_shared<SharedBuffer<Tensor>>(const_cast<char*>(static_cast<const char*>(tensor.data())),
+                                                    tensor.get_byte_size(),
+                                                    tensor)} {
     constructor_validate_and_infer_types();
 }
 

src/core/src/op/convert.cpp

@@ -57,7 +57,7 @@ struct Evaluate : public element::NoAction<bool> {
                           CONVERT_ET_LIST,
                           EvalByOutputType,
                           out.get_element_type(),
-                          iterator<ET_IN>(reinterpret_cast<const TI*>(arg.data())),
+                          iterator<ET_IN>(arg.data()),
                           out,
                           count);
     }

src/core/src/op/depth_to_space.cpp

@@ -51,7 +51,7 @@ bool DepthToSpace::evaluate(TensorVector& outputs, const TensorVector& inputs) c
     OPENVINO_ASSERT(outputs.size() == 1);
 
     const auto& in = inputs[0];
-    const auto& out = outputs[0];
+    auto& out = outputs[0];
     reference::depth_to_space(static_cast<const char*>(in.data()),
                               in.get_shape(),
                               static_cast<char*>(out.data()),

src/core/src/op/divide.cpp

@@ -94,7 +94,7 @@ bool evaluate_bound(const Node* node, TensorVector& output_values, bool is_upper
         return false;
 
     const auto zeros_const = Constant::create(input2.get_element_type(), {}, {0});
-    const auto zero_t = Tensor(input2.get_element_type(), Shape{});
+    auto zero_t = Tensor(input2.get_element_type(), Shape{});
     memcpy(zero_t.data(), zeros_const->get_data_ptr(), zero_t.get_byte_size());
 
     const auto max_value = ov::util::make_tensor_of_max_value(input2.get_element_type());
@@ -172,7 +172,7 @@ bool evaluate_bound(const Node* node, TensorVector& output_values, bool is_upper
 
         // replace zeros by 1 values to get result of divide for other values of arguments
         const auto ones = Constant::create(input2.get_element_type(), input2.get_shape(), {1});
-        const auto ones_t = Tensor(ones->get_element_type(), ones->get_shape());
+        auto ones_t = Tensor(ones->get_element_type(), ones->get_shape());
         memcpy(ones_t.data(), ones->get_data_ptr(), ones_t.get_byte_size());
 
         status = Select().evaluate(value2_outs, {input2_zeros_mask, ones_t, value2});

src/core/src/op/roi_align.cpp

@@ -162,7 +162,7 @@ template <element::Type_t ET>
 bool evaluate(const Tensor& feature_maps,
               const Tensor& rois,
               const std::vector<int64_t>& batch_indices_vec_scaled_up,
-              const Tensor& out,
+              Tensor& out,
               const int pooled_height,
               const int pooled_width,
               const int sampling_ratio,
@@ -189,7 +189,7 @@ bool evaluate(const Tensor& feature_maps,
 }
 
 bool evaluate(const TensorVector& args,
-              const Tensor& out,
+              Tensor& out,
               const int pooled_height,
               const int pooled_width,
               const int sampling_ratio,

src/core/src/op/space_to_batch.cpp

@@ -74,7 +74,7 @@ namespace space_to_batch {
 namespace {
 bool evaluate(TensorVector& outputs, const TensorVector& inputs) {
     const auto& data = inputs[0];
-    const auto& out = outputs[0];
+    auto& out = outputs[0];
     const auto elem_size = data.get_element_type().size();
 
     auto data_shape = data.get_shape();

src/core/src/op/space_to_depth.cpp

@@ -55,7 +55,7 @@ bool SpaceToDepth::evaluate(TensorVector& outputs, const TensorVector& inputs) c
     OPENVINO_ASSERT(outputs.size() == 1);
 
     const auto& in = inputs[0];
-    const auto& out = outputs[0];
+    auto& out = outputs[0];
     reference::space_to_depth(static_cast<const char*>(in.data()),
                               in.get_shape(),
                               static_cast<char*>(out.data()),

src/core/src/op/split.cpp

@@ -91,7 +91,7 @@ bool Split::evaluate(TensorVector& outputs, const TensorVector& inputs) const {
         auto axis = get_tensor_data_as<int64_t>(axis_tensor).front();
         axis = ov::util::normalize(axis, data_tensor.get_shape().size());
 
-        ov::reference::split(static_cast<char*>(data_tensor.data()),
+        ov::reference::split(static_cast<const char*>(data_tensor.data()),
                              data_tensor.get_shape(),
                              data_tensor.get_element_type().size(),
                              axis,

src/core/src/op/transpose.cpp

@@ -96,7 +96,8 @@ bool Transpose::evaluate(TensorVector& outputs, const TensorVector& inputs) cons
         };
 
         auto out_ptr = int4_iterator(static_cast<uint8_t*>(out.data()));
-        auto in_ptr = int4_iterator(static_cast<uint8_t*>(arg.data()));
+        // The int4_iterator not supports const pointer but these data are not modified
+        auto in_ptr = int4_iterator(static_cast<uint8_t*>(const_cast<void*>(arg.data())));
         if ((arg_type == ov::element::i4 || arg_type == ov::element::u4) && arg.get_shape().size() == 2) {
             for (size_t i = 0; i < out_shape[0]; i++) {
                 size_t off = i;

src/core/src/op/util/pad_base.cpp

@@ -106,7 +106,7 @@ bool op::util::PadBase::evaluate_pad(TensorVector& outputs, const TensorVector&
     const char* pad_value = nullptr;
     const std::vector<char> pad_zero_value(elem_size, 0);
     if (get_input_size() == 4) {
-        pad_value = static_cast<char*>(inputs[3].data());
+        pad_value = static_cast<const char*>(inputs[3].data());
     } else {
         pad_value = pad_zero_value.data();
     }
@@ -127,7 +127,7 @@ bool op::util::PadBase::evaluate_pad(TensorVector& outputs, const TensorVector&
     }
     outputs[0].set_shape(padded_shape);
 
-    ov::reference::pad(static_cast<char*>(inputs[0].data()),
+    ov::reference::pad(static_cast<const char*>(inputs[0].data()),
                        pad_value,
                        static_cast<char*>(outputs[0].data()),
                        elem_size,

src/core/src/runtime/itensor.cpp

@@ -189,4 +189,8 @@ void ITensor::copy_to(const std::shared_ptr<ov::ITensor>& dst) const {
     }
 }
 
+void* ITensor::data(const element::Type& type) {
+    return const_cast<void*>(static_cast<const ITensor*>(this)->data(type));
+}
+
 }  // namespace ov