// Copyright 2020 The Dawn Authors
//
// 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.

#include "dawn/native/d3d12/PageableD3D12.h"

#include <utility>

namespace dawn::native::d3d12 {
Pageable::Pageable(ComPtr<ID3D12Pageable> d3d12Pageable, MemorySegment memorySegment, uint64_t size)
    : mD3d12Pageable(std::move(d3d12Pageable)), mMemorySegment(memorySegment), mSize(size) {}

// When a pageable is destroyed, it no longer resides in resident memory, so we must evict
// it from the LRU cache. If this heap is not manually removed from the LRU-cache, the
// ResidencyManager will attempt to use it after it has been deallocated.
Pageable::~Pageable() {
    if (IsInResidencyLRUCache()) {
        RemoveFromList();
    }
}

ID3D12Pageable* Pageable::GetD3D12Pageable() const {
    return mD3d12Pageable.Get();
}

ExecutionSerial Pageable::GetLastUsage() const {
    return mLastUsage;
}

void Pageable::SetLastUsage(ExecutionSerial serial) {
    mLastUsage = serial;
}

ExecutionSerial Pageable::GetLastSubmission() const {
    return mLastSubmission;
}

void Pageable::SetLastSubmission(ExecutionSerial serial) {
    mLastSubmission = serial;
}

MemorySegment Pageable::GetMemorySegment() const {
    return mMemorySegment;
}

uint64_t Pageable::GetSize() const {
    return mSize;
}

bool Pageable::IsInResidencyLRUCache() const {
    return IsInList();
}

void Pageable::IncrementResidencyLock() {
    mResidencyLockRefCount++;
}

void Pageable::DecrementResidencyLock() {
    mResidencyLockRefCount--;
}

bool Pageable::IsResidencyLocked() const {
    return mResidencyLockRefCount != 0;
}
}  // namespace dawn::native::d3d12