From 68dd25fbe6e4d3c3513fa5993863419769aa08fc Mon Sep 17 00:00:00 2001
From: Sang-Hoon Park <sang-hoon.park@arm.com>
Date: Mon, 19 Oct 2020 16:00:11 +0100
Subject: COMPMID-3637: Move utility headers from arm_compute to src

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: If9d6fa8c900b68c4b6fd373f2fc1f9abb83ea917
Signed-off-by: Michalis Spyrou <michalis.spyrou@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4145
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Sang-Hoon Park <sang-hoon.park@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
---
 support/Cast.h | 119 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 support/Cast.h

(limited to 'support/Cast.h')

diff --git a/support/Cast.h b/support/Cast.h
new file mode 100644
index 0000000000..53d5f68065
--- /dev/null
+++ b/support/Cast.h
@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2018-2020 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_MISC_CAST_H
+#define ARM_COMPUTE_MISC_CAST_H
+
+#include "arm_compute/core/Error.h"
+
+namespace arm_compute
+{
+namespace utils
+{
+namespace cast
+{
+/** Polymorphic cast between two types
+ *
+ * @warning Will throw an exception if cast cannot take place
+ *
+ * @tparam Target Target to cast type
+ * @tparam Source Source from cast type
+ *
+ * @param[in] v Value to cast
+ *
+ * @return The casted value
+ */
+template <typename Target, typename Source>
+inline Target polymorphic_cast(Source *v)
+{
+    if(dynamic_cast<Target>(v) == nullptr)
+    {
+        ARM_COMPUTE_THROW(std::bad_cast());
+    }
+    return static_cast<Target>(v);
+}
+
+/** Polymorphic down cast between two types
+ *
+ * @warning Will assert if cannot take place
+ *
+ * @tparam Target Target to cast type
+ * @tparam Source Source from cast type
+ *
+ * @param[in] v Value to cast
+ *
+ * @return The casted value
+ */
+template <typename Target, typename Source>
+inline Target polymorphic_downcast(Source *v)
+{
+    ARM_COMPUTE_ERROR_ON(dynamic_cast<Target>(v) != static_cast<Target>(v));
+    return static_cast<Target>(v);
+}
+
+/** Polymorphic cast between two unique pointer types
+ *
+ * @warning Will throw an exception if cast cannot take place
+ *
+ * @tparam Target  Target to cast type
+ * @tparam Source  Source from cast type
+ * @tparam Deleter Deleter function type
+ *
+ * @param[in] v Value to cast
+ *
+ * @return The casted value
+ */
+template <typename Target, typename Source, typename Deleter>
+std::unique_ptr<Target, Deleter> polymorphic_cast_unique_ptr(std::unique_ptr<Source, Deleter> &&v)
+{
+    if(dynamic_cast<Target *>(v.get()) == nullptr)
+    {
+        ARM_COMPUTE_THROW(std::bad_cast());
+    }
+    auto r = static_cast<Target *>(v.release());
+    return std::unique_ptr<Target, Deleter>(r, std::move(v.get_deleter()));
+}
+
+/** Polymorphic down cast between two unique pointer types
+ *
+ * @warning Will assert if cannot take place
+ *
+ * @tparam Target  Target to cast type
+ * @tparam Source  Source from cast type
+ * @tparam Deleter Deleter function type
+ *
+ * @param[in] v Value to cast
+ *
+ * @return The casted value
+ */
+template <typename Target, typename Source, typename Deleter>
+std::unique_ptr<Target, Deleter> polymorphic_downcast_unique_ptr(std::unique_ptr<Source, Deleter> &&v)
+{
+    ARM_COMPUTE_ERROR_ON(dynamic_cast<Target *>(v.get()) != static_cast<Target *>(v.get()));
+    auto r = static_cast<Target *>(v.release());
+    return std::unique_ptr<Target, Deleter>(r, std::move(v.get_deleter()));
+}
+} // namespace cast
+} // namespace utils
+} // namespace arm_compute
+#endif /* ARM_COMPUTE_MISC_CAST_H */
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