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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
/// Declaration of the Diligent::ResourceMappingImpl class
#include <unordered_map>
#include "ResourceMapping.h"
#include "ObjectBase.hpp"
#include "HashUtils.hpp"
#include "STDAllocator.hpp"
#include "RefCntAutoPtr.hpp"
namespace Diligent
{
class FixedBlockMemoryAllocator;
/// Implementation of the resource mapping
class ResourceMappingImpl : public ObjectBase<IResourceMapping>
{
public:
typedef ObjectBase<IResourceMapping> TObjectBase;
/// \param pRefCounters - reference counters object that controls the lifetime of this resource mapping
/// \param RawMemAllocator - raw memory allocator that is used by the m_HashTable member
ResourceMappingImpl(IReferenceCounters* pRefCounters, IMemoryAllocator& RawMemAllocator) :
TObjectBase{pRefCounters},
m_HashTable{STD_ALLOCATOR_RAW_MEM(HashTableElem, RawMemAllocator, "Allocator for unordered_map<ResMappingHashKey, RefCntAutoPtr<IDeviceObject>>")}
{}
~ResourceMappingImpl();
IMPLEMENT_QUERY_INTERFACE_IN_PLACE(IID_ResourceMapping, TObjectBase)
/// Implementation of IResourceMapping::AddResource()
virtual void DILIGENT_CALL_TYPE AddResource(const Char* Name,
IDeviceObject* pObject,
bool bIsUnique) override final;
/// Implementation of IResourceMapping::AddResourceArray()
virtual void DILIGENT_CALL_TYPE AddResourceArray(const Char* Name,
Uint32 StartIndex,
IDeviceObject* const* ppObjects,
Uint32 NumElements,
bool bIsUnique) override final;
/// Implementation of IResourceMapping::RemoveResourceByName()
virtual void DILIGENT_CALL_TYPE RemoveResourceByName(const Char* Name, Uint32 ArrayIndex) override final;
/// Implementation of IResourceMapping::GetResource()
virtual void DILIGENT_CALL_TYPE GetResource(const Char* Name,
IDeviceObject** ppResource,
Uint32 ArrayIndex) override final;
/// Returns number of resources in the resource mapping.
virtual size_t DILIGENT_CALL_TYPE GetSize() override final;
private:
struct ResMappingHashKey : public HashMapStringKey
{
using TBase = HashMapStringKey;
ResMappingHashKey(const Char* Str, bool bMakeCopy, Uint32 ArrInd) noexcept :
HashMapStringKey{Str, bMakeCopy},
ArrayIndex{ArrInd}
{
Ownership_Hash = (ComputeHash(GetHash(), ArrInd) & HashMask) | (Ownership_Hash & StrOwnershipMask);
}
ResMappingHashKey(ResMappingHashKey&& rhs) noexcept :
HashMapStringKey{std::move(rhs)},
ArrayIndex{rhs.ArrayIndex}
{}
// clang-format off
ResMappingHashKey ( const ResMappingHashKey& ) = delete;
ResMappingHashKey& operator = ( const ResMappingHashKey& ) = delete;
ResMappingHashKey& operator = ( ResMappingHashKey&& ) = delete;
// clang-format on
bool operator==(const ResMappingHashKey& RHS) const
{
if (ArrayIndex != RHS.ArrayIndex)
{
// We must check array index first because TBase::operator==()
// expects that if the hashes are different, the strings must be
// different too. This will not be the case for different array
// elements of the same variable.
return false;
}
return static_cast<const TBase&>(*this) == static_cast<const TBase&>(RHS);
}
const Uint32 ArrayIndex;
};
ThreadingTools::LockHelper Lock();
ThreadingTools::LockFlag m_LockFlag;
using HashTableElem = std::pair<const ResMappingHashKey, RefCntAutoPtr<IDeviceObject>>;
std::unordered_map<ResMappingHashKey,
RefCntAutoPtr<IDeviceObject>,
ResMappingHashKey::Hasher,
std::equal_to<ResMappingHashKey>,
STDAllocatorRawMem<HashTableElem>>
m_HashTable;
};
} // namespace Diligent
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