115 lines
3.4 KiB
C++
115 lines
3.4 KiB
C++
/*
|
|
* Copyright (c) 2017-2020 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_SUPPORT_MEMORYSUPPORT
|
|
#define ARM_COMPUTE_SUPPORT_MEMORYSUPPORT
|
|
|
|
#include <memory>
|
|
|
|
namespace arm_compute
|
|
{
|
|
namespace support
|
|
{
|
|
namespace cpp11
|
|
{
|
|
// std::align is missing in GCC 4.9
|
|
// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57350
|
|
inline void *align(std::size_t alignment, std::size_t size, void *&ptr, std::size_t &space)
|
|
{
|
|
std::uintptr_t pn = reinterpret_cast<std::uintptr_t>(ptr);
|
|
std::uintptr_t aligned = (pn + alignment - 1) & -alignment;
|
|
std::size_t padding = aligned - pn;
|
|
if(space < size + padding)
|
|
{
|
|
return nullptr;
|
|
}
|
|
|
|
space -= padding;
|
|
|
|
return ptr = reinterpret_cast<void *>(aligned);
|
|
}
|
|
} //namespace cpp11
|
|
namespace cpp14
|
|
{
|
|
/** make_unique is missing in CPP11. Re-implement it according to the standard proposal. */
|
|
|
|
/**<Template for single object */
|
|
template <class T>
|
|
struct _Unique_if
|
|
{
|
|
typedef std::unique_ptr<T> _Single_object; /**< Single object type */
|
|
};
|
|
|
|
/** Template for array */
|
|
template <class T>
|
|
struct _Unique_if<T[]>
|
|
{
|
|
typedef std::unique_ptr<T[]> _Unknown_bound; /**< Array type */
|
|
};
|
|
|
|
/** Template for array with known bounds (to throw an error).
|
|
*
|
|
* @note this is intended to never be hit.
|
|
*/
|
|
template <class T, size_t N>
|
|
struct _Unique_if<T[N]>
|
|
{
|
|
typedef void _Known_bound; /**< Should never be used */
|
|
};
|
|
|
|
/** Construct a single object and return a unique pointer to it.
|
|
*
|
|
* @param[in] args Constructor arguments.
|
|
*
|
|
* @return a unique pointer to the new object.
|
|
*/
|
|
template <class T, class... Args>
|
|
typename _Unique_if<T>::_Single_object
|
|
make_unique(Args &&... args)
|
|
{
|
|
return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
|
|
}
|
|
|
|
/** Construct an array of objects and return a unique pointer to it.
|
|
*
|
|
* @param[in] n Array size
|
|
*
|
|
* @return a unique pointer to the new array.
|
|
*/
|
|
template <class T>
|
|
typename _Unique_if<T>::_Unknown_bound
|
|
make_unique(size_t n)
|
|
{
|
|
typedef typename std::remove_extent<T>::type U;
|
|
return std::unique_ptr<T>(new U[n]());
|
|
}
|
|
|
|
/** It is invalid to attempt to make_unique an array with known bounds. */
|
|
template <class T, class... Args>
|
|
typename _Unique_if<T>::_Known_bound
|
|
make_unique(Args &&...) = delete;
|
|
} // namespace cpp14
|
|
} // namespace support
|
|
} // namespace arm_compute
|
|
#endif /* ARM_COMPUTE_SUPPORT_MEMORYSUPPORT */
|