COMPMID-344 Updated doxygen
Change-Id: I32f7b84daa560e460b77216add529c8fa8b327ae
diff --git a/src/runtime/TensorAllocator.cpp b/src/runtime/TensorAllocator.cpp
new file mode 100644
index 0000000..5c719c7
--- /dev/null
+++ b/src/runtime/TensorAllocator.cpp
@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2016, 2017 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "arm_compute/runtime/TensorAllocator.h"
+
+#include "arm_compute/core/Coordinates.h"
+#include "arm_compute/core/Error.h"
+#include "arm_compute/core/TensorInfo.h"
+
+#include <cstddef>
+
+using namespace arm_compute;
+
+namespace
+{
+bool validate_subtensor_shape(const TensorInfo &parent_info, const TensorInfo &child_info, const Coordinates &coords)
+{
+ bool is_valid = true;
+ const TensorShape &parent_shape = parent_info.tensor_shape();
+ const TensorShape &child_shape = child_info.tensor_shape();
+ const size_t parent_dims = parent_info.num_dimensions();
+ const size_t child_dims = child_info.num_dimensions();
+
+ if(child_dims <= parent_dims)
+ {
+ for(size_t num_dimensions = child_dims; num_dimensions > 0; --num_dimensions)
+ {
+ const size_t child_dim_size = coords[num_dimensions - 1] + child_shape[num_dimensions - 1];
+
+ if((coords[num_dimensions - 1] < 0) || (child_dim_size > parent_shape[num_dimensions - 1]))
+ {
+ is_valid = false;
+ break;
+ }
+ }
+ }
+ else
+ {
+ is_valid = false;
+ }
+
+ return is_valid;
+}
+} // namespace
+
+TensorAllocator::TensorAllocator()
+ : _buffer(nullptr)
+{
+}
+
+void TensorAllocator::init(const TensorAllocator &allocator, const Coordinates &coords, TensorInfo sub_info)
+{
+ // Get parent info
+ const TensorInfo parent_info = allocator.info();
+
+ // Check if coordinates and new shape are within the parent tensor
+ ARM_COMPUTE_ERROR_ON(!validate_subtensor_shape(parent_info, sub_info, coords));
+ ARM_COMPUTE_UNUSED(validate_subtensor_shape);
+
+ // Copy pointer to buffer
+ _buffer = allocator._buffer;
+
+ // Init tensor info with new dimensions
+ size_t total_size = parent_info.offset_element_in_bytes(coords) + sub_info.total_size() - sub_info.offset_first_element_in_bytes();
+ sub_info.init(sub_info.tensor_shape(), sub_info.format(), parent_info.strides_in_bytes(), parent_info.offset_element_in_bytes(coords), total_size);
+
+ // Set TensorInfo
+ init(sub_info);
+}
+
+uint8_t *TensorAllocator::data() const
+{
+ return (_buffer != nullptr) ? _buffer.get()->data() : nullptr;
+}
+
+void TensorAllocator::allocate()
+{
+ ARM_COMPUTE_ERROR_ON(_buffer != nullptr);
+
+ _buffer = std::make_shared<std::vector<uint8_t>>(info().total_size());
+ info().set_is_resizable(false);
+}
+
+void TensorAllocator::free()
+{
+ ARM_COMPUTE_ERROR_ON(_buffer == nullptr);
+
+ _buffer.reset();
+ info().set_is_resizable(true);
+}
+
+uint8_t *TensorAllocator::lock()
+{
+ return (_buffer != nullptr) ? _buffer.get()->data() : nullptr;
+}
+
+void TensorAllocator::unlock()
+{
+}