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/*
* Copyright 2019-2021 Diligent Graphics LLC
* Copyright 2015-2019 Egor Yusov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* In no event and under no legal theory, whether in tort (including negligence),
* contract, or otherwise, unless required by applicable law (such as deliberate
* and grossly negligent acts) or agreed to in writing, shall any Contributor be
* liable for any damages, including any direct, indirect, special, incidental,
* or consequential damages of any character arising as a result of this License or
* out of the use or inability to use the software (including but not limited to damages
* for loss of goodwill, work stoppage, computer failure or malfunction, or any and
* all other commercial damages or losses), even if such Contributor has been advised
* of the possibility of such damages.
*/
#pragma once
/// \file
/// Defines Diligent::DefaultRawMemoryAllocator class
#include <limits>
#include "../../Primitives/interface/BasicTypes.h"
#include "../../Primitives/interface/MemoryAllocator.h"
#include "../../Platforms/Basic/interface/DebugUtilities.hpp"
namespace Diligent
{
template <typename T>
typename std::enable_if<std::is_destructible<T>::value, void>::type Destruct(T* ptr)
{
ptr->~T();
}
template <typename T>
typename std::enable_if<!std::is_destructible<T>::value, void>::type Destruct(T* ptr)
{
}
template <typename T, typename AllocatorType>
struct STDAllocator
{
using value_type = T;
using pointer = value_type*;
using const_pointer = const value_type*;
using reference = value_type&;
using const_reference = const value_type&;
using size_type = std::size_t;
using difference_type = std::ptrdiff_t;
STDAllocator(AllocatorType& Allocator, const Char* Description, const Char* FileName, const Int32 LineNumber) noexcept :
// clang-format off
m_Allocator {Allocator}
#ifdef DILIGENT_DEVELOPMENT
, m_dvpDescription{Description}
, m_dvpFileName {FileName }
, m_dvpLineNumber {LineNumber }
#endif
// clang-format on
{
}
template <class U>
STDAllocator(const STDAllocator<U, AllocatorType>& other) noexcept :
// clang-format off
m_Allocator {other.m_Allocator}
#ifdef DILIGENT_DEVELOPMENT
, m_dvpDescription{other.m_dvpDescription}
, m_dvpFileName {other.m_dvpFileName }
, m_dvpLineNumber {other.m_dvpLineNumber }
#endif
// clang-format on
{
}
template <class U>
STDAllocator(STDAllocator<U, AllocatorType>&& other) noexcept :
// clang-format off
m_Allocator {other.m_Allocator}
#ifdef DILIGENT_DEVELOPMENT
, m_dvpDescription{other.m_dvpDescription}
, m_dvpFileName {other.m_dvpFileName }
, m_dvpLineNumber {other.m_dvpLineNumber }
#endif
// clang-format on
{
}
template <class U>
STDAllocator& operator=(STDAllocator<U, AllocatorType>&& other) noexcept
{
// Android build requires this operator to be defined - I have no idea why.
// There is no default constructor to create null allocator, so all fields must be
// initialized.
DEV_CHECK_ERR(&m_Allocator == &other.m_Allocator, "Inconsistent allocators");
#ifdef DILIGENT_DEVELOPMENT
DEV_CHECK_ERR(m_dvpDescription == other.m_dvpDescription, "Incosistent allocator descriptions");
DEV_CHECK_ERR(m_dvpFileName == other.m_dvpFileName, "Incosistent allocator file names");
DEV_CHECK_ERR(m_dvpLineNumber == other.m_dvpLineNumber, "Incosistent allocator line numbers");
#endif
return *this;
}
template <class U> struct rebind
{
typedef STDAllocator<U, AllocatorType> other;
};
T* allocate(std::size_t count)
{
#ifndef DILIGENT_DEVELOPMENT
static constexpr const char* m_dvpDescription = "<Unavailable in release build>";
static constexpr const char* m_dvpFileName = "<Unavailable in release build>";
static constexpr Int32 m_dvpLineNumber = -1;
#endif
return reinterpret_cast<T*>(m_Allocator.Allocate(count * sizeof(T), m_dvpDescription, m_dvpFileName, m_dvpLineNumber));
}
pointer address(reference r) { return &r; }
const_pointer address(const_reference r) { return &r; }
void deallocate(T* p, std::size_t count)
{
m_Allocator.Free(p);
}
inline size_type max_size() const
{
return std::numeric_limits<size_type>::max() / sizeof(T);
}
// construction/destruction
template <class U, class... Args>
void construct(U* p, Args&&... args)
{
::new (p) U(std::forward<Args>(args)...);
}
inline void destroy(pointer p)
{
p->~T();
}
AllocatorType& m_Allocator;
#ifdef DILIGENT_DEVELOPMENT
const Char* const m_dvpDescription;
const Char* const m_dvpFileName;
Int32 const m_dvpLineNumber;
#endif
};
#define STD_ALLOCATOR(Type, AllocatorType, Allocator, Description) STDAllocator<Type, AllocatorType>(Allocator, Description, __FILE__, __LINE__)
template <class T, class U, class A>
bool operator==(const STDAllocator<T, A>& left, const STDAllocator<U, A>& right)
{
return &left.m_Allocator == &right.m_Allocator;
}
template <class T, class U, class A>
bool operator!=(const STDAllocator<T, A>& left, const STDAllocator<U, A>& right)
{
return !(left == right);
}
template <class T> using STDAllocatorRawMem = STDAllocator<T, IMemoryAllocator>;
#define STD_ALLOCATOR_RAW_MEM(Type, Allocator, Description) STDAllocatorRawMem<Type>(Allocator, Description, __FILE__, __LINE__)
template <class T, typename AllocatorType>
struct STDDeleter
{
STDDeleter() noexcept {}
STDDeleter(AllocatorType& Allocator) noexcept :
m_Allocator{&Allocator}
{}
STDDeleter(const STDDeleter&) = default;
STDDeleter& operator=(const STDDeleter&) = default;
STDDeleter(STDDeleter&& rhs) noexcept :
m_Allocator{rhs.m_Allocator}
{
rhs.m_Allocator = nullptr;
}
STDDeleter& operator=(STDDeleter&& rhs) noexcept
{
m_Allocator = rhs.m_Allocator;
rhs.m_Allocator = nullptr;
return *this;
}
void operator()(T* ptr) noexcept
{
VERIFY(m_Allocator != nullptr, "The deleter has been moved away or never initialized, and can't be used");
Destruct(ptr);
m_Allocator->Free(ptr);
}
private:
AllocatorType* m_Allocator = nullptr;
};
template <class T> using STDDeleterRawMem = STDDeleter<T, IMemoryAllocator>;
} // namespace Diligent
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