COMPMID-3391: Implement Async interfaces

Change-Id: I8168cea5056ff48a0253ebb8c88ea549a3ea69a2
Signed-off-by: Michalis Spyrou <michalis.spyrou@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/3335
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
diff --git a/arm_compute/core/experimental/Types.h b/arm_compute/core/experimental/Types.h
new file mode 100644
index 0000000..6043db9
--- /dev/null
+++ b/arm_compute/core/experimental/Types.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2020 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.
+ */
+#ifndef ARM_COMPUTE_EXPERIMENTAL_TYPES_H
+#define ARM_COMPUTE_EXPERIMENTAL_TYPES_H
+
+#include "arm_compute/core/TensorShape.h"
+
+#include <map>
+#include <vector>
+
+namespace arm_compute
+{
+class ITensor;
+
+/** Memory type */
+enum class TensorType
+{
+    ACL_SRC   = 0,
+    ACL_SRC_0 = 0,
+    ACL_SRC_1 = 1,
+    ACL_SRC_2 = 2,
+    ACL_DST   = 30,
+    ACL_DST_0 = 30,
+    ACL_DST_1 = 31,
+    ACL_INT   = 50,
+    ACL_INT_0 = 50,
+    ACL_INT_1 = 51,
+    ACL_INT_2 = 52
+};
+using InputOperatorTensors  = std::pair<TensorType /* tensor type */, const ITensor * /* tensor object */>;
+using OutputOperatorTensors = std::pair<TensorType /* tensor type */, ITensor * /* tensor object */>;
+using OperatorTensors       = OutputOperatorTensors;
+
+namespace experimental
+{
+struct MemoryInfo
+{
+    MemoryInfo(TensorType type, size_t size, size_t alignment)
+        : type(type), size(size), alignment(alignment)
+    {
+    }
+    TensorType type;
+    size_t     size;
+    size_t     alignment;
+};
+
+using MemoryRequirements = std::vector<MemoryInfo>;
+} // namespace experimental
+} // namespace arm_compute
+#endif /* ARM_COMPUTE_EXPERIMENTAL_TYPES_H */