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// Copyright 2020 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "dawn/native/PooledResourceMemoryAllocator.h"
#include <utility>
#include "dawn/native/Device.h"
namespace dawn::native {
PooledResourceMemoryAllocator::PooledResourceMemoryAllocator(ResourceHeapAllocator* heapAllocator)
: mHeapAllocator(heapAllocator) {}
PooledResourceMemoryAllocator::~PooledResourceMemoryAllocator() {
DAWN_ASSERT(mPool.empty());
}
void PooledResourceMemoryAllocator::DestroyPool() {
for (auto& resourceHeap : mPool) {
DAWN_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