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// 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/PooledResourceMemoryAllocator.h"
#include <utility>
#include "dawn/native/Device.h"
namespace dawn::native {
PooledResourceMemoryAllocator::PooledResourceMemoryAllocator(ResourceHeapAllocator* heapAllocator)
: mHeapAllocator(heapAllocator) {}
PooledResourceMemoryAllocator::~PooledResourceMemoryAllocator() {
ASSERT(mPool.empty());
}
void PooledResourceMemoryAllocator::DestroyPool() {
for (auto& resourceHeap : mPool) {
ASSERT(resourceHeap != nullptr);
mHeapAllocator->DeallocateResourceHeap(std::move(resourceHeap));
}
mPool.clear();
}
ResultOrError<std::unique_ptr<ResourceHeapBase>>
PooledResourceMemoryAllocator::AllocateResourceHeap(uint64_t size) {
// Pooled memory is LIFO because memory can be evicted by LRU. However, this means
// pooling is disabled in-frame when the memory is still pending. For high in-frame
// memory users, FIFO might be preferable when memory consumption is a higher priority.
std::unique_ptr<ResourceHeapBase> memory;
if (!mPool.empty()) {
memory = std::move(mPool.front());
mPool.pop_front();
}
if (memory == nullptr) {
DAWN_TRY_ASSIGN(memory, mHeapAllocator->AllocateResourceHeap(size));
}
return std::move(memory);
}
void PooledResourceMemoryAllocator::DeallocateResourceHeap(
std::unique_ptr<ResourceHeapBase> allocation) {
mPool.push_front(std::move(allocation));
}
uint64_t PooledResourceMemoryAllocator::GetPoolSizeForTesting() const {
return mPool.size();
}
} // namespace dawn::native