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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/PersistentCache.h"
#include "common/Assert.h"
#include "dawn_native/Device.h"
#include "dawn_platform/DawnPlatform.h"
namespace dawn_native {
PersistentCache::PersistentCache(DeviceBase* device)
: mDevice(device), mCache(GetPlatformCache()) {
}
ScopedCachedBlob PersistentCache::LoadData(const PersistentCacheKey& key) {
ScopedCachedBlob blob = {};
if (mCache == nullptr) {
return blob;
}
std::lock_guard<std::mutex> lock(mMutex);
blob.bufferSize = mCache->LoadData(reinterpret_cast<WGPUDevice>(mDevice), key.data(),
key.size(), nullptr, 0);
if (blob.bufferSize > 0) {
blob.buffer.reset(new uint8_t[blob.bufferSize]);
const size_t bufferSize =
mCache->LoadData(reinterpret_cast<WGPUDevice>(mDevice), key.data(), key.size(),
blob.buffer.get(), blob.bufferSize);
ASSERT(bufferSize == blob.bufferSize);
return blob;
}
return blob;
}
void PersistentCache::StoreData(const PersistentCacheKey& key, const void* value, size_t size) {
if (mCache == nullptr) {
return;
}
ASSERT(value != nullptr);
ASSERT(size > 0);
std::lock_guard<std::mutex> lock(mMutex);
mCache->StoreData(reinterpret_cast<WGPUDevice>(mDevice), key.data(), key.size(), value,
size);
}
dawn_platform::CachingInterface* PersistentCache::GetPlatformCache() {
// TODO(dawn:549): Create a fingerprint of concatenated version strings (ex. Tint commit
// hash, Dawn commit hash). This will be used by the client so it may know when to discard
// previously cached Dawn objects should this fingerprint change.
dawn_platform::Platform* platform = mDevice->GetPlatform();
if (platform != nullptr) {
return platform->GetCachingInterface(/*fingerprint*/ nullptr, /*fingerprintSize*/ 0);
}
return nullptr;
}
} // namespace dawn_native