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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#include "rocksdb/secondary_cache.h"
#include "cache/cache_entry_roles.h"
namespace ROCKSDB_NAMESPACE {
namespace {
size_t SliceSize(void* obj) { return static_cast<Slice*>(obj)->size(); }
Status SliceSaveTo(void* from_obj, size_t from_offset, size_t length,
void* out) {
const Slice& slice = *static_cast<Slice*>(from_obj);
std::memcpy(out, slice.data() + from_offset, length);
return Status::OK();
}
} // namespace
Status SecondaryCache::InsertSaved(const Slice& key, const Slice& saved) {
static Cache::CacheItemHelper helper{
&SliceSize, &SliceSaveTo, GetNoopDeleterForRole<CacheEntryRole::kMisc>()};
// NOTE: depends on Insert() being synchronous, not keeping pointer `&saved`
return Insert(key, const_cast<Slice*>(&saved), &helper);
}
} // namespace ROCKSDB_NAMESPACE
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