src/dawn/native/PipelineCache.cpp

// Copyright 2022 The Dawn & Tint Authors
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#include "dawn/native/PipelineCache.h"

namespace dawn::native {

PipelineCacheBase::PipelineCacheBase(BlobCache* cache, const CacheKey& key)
    : mCache(cache), mKey(key) {}

Blob PipelineCacheBase::Initialize() {
    DAWN_ASSERT(!mInitialized);
    Blob blob = mCache->Load(mKey);
    mCacheHit = !blob.Empty();
    mInitialized = true;
    return blob;
}

bool PipelineCacheBase::CacheHit() const {
    DAWN_ASSERT(mInitialized);
    return mCacheHit;
}

MaybeError PipelineCacheBase::Flush() {
    // Try to write the data out to the persistent cache.
    Blob blob;
    DAWN_TRY(SerializeToBlobImpl(&blob));
    if (blob.Size() > 0) {
        // Using a simple heuristic to decide whether to write out the blob right now. May need
        // smarter tracking when we are dealing with monolithic caches.
        mCache->Store(mKey, blob);
    }
    return {};
}

MaybeError PipelineCacheBase::FlushIfNeeded() {
    DAWN_ASSERT(mInitialized);
    if (!CacheHit()) {
        return Flush();
    }
    return {};
}

}  // namespace dawn::native