65 lines
2.6 KiB
C++
65 lines
2.6 KiB
C++
// Copyright 2022 The Dawn Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SRC_DAWN_NATIVE_PIPELINECACHE_H_
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#define SRC_DAWN_NATIVE_PIPELINECACHE_H_
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#include "dawn/common/RefCounted.h"
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#include "dawn/native/BlobCache.h"
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#include "dawn/native/CacheKey.h"
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#include "dawn/native/Error.h"
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namespace dawn::native {
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// Abstraction layer for backend dependent pipeline caching.
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class PipelineCacheBase : public RefCounted {
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public:
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// Returns whether or not we got a cache hit when initializing.
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bool CacheHit() const;
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// Serializes and writes the current contents of the backend cache object into the backing
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// blob cache, potentially overwriting what is already there. Useful when we are working
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// with more monolithic-like caches where we expect overwriting sometimes.
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MaybeError Flush();
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// Serializes and writes the current contents of the backend cache object into the backing
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// blob cache iff the initial read from the backend cache did not result in a hit.
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MaybeError FlushIfNeeded();
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protected:
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PipelineCacheBase(BlobCache* cache, const CacheKey& key);
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// Initializes and returns the cached blob given the cache and keys. Used by backend
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// implementations to get the cache and set the cache hit state. Should only be called once.
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CachedBlob Initialize();
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private:
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// Backend implementation of serialization of the cache into a blob.
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// Note: given that no local cached blob should be destructed and copy elision has strict
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// requirement cached blob is passed in as a pointer to be assigned.
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virtual MaybeError SerializeToBlobImpl(CachedBlob* blob) = 0;
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// The blob cache is owned by the Adapter and pipeline caches are owned/created by devices
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// or adapters. Since the device owns a reference to the Instance which owns the Adapter,
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// the blob cache is guaranteed to be valid throughout the lifetime of the object.
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BlobCache* mCache;
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CacheKey mKey;
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bool mInitialized = false;
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bool mCacheHit = false;
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};
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} // namespace dawn::native
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#endif // SRC_DAWN_NATIVE_PIPELINECACHE_H_
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