fork of https://github.com/rust-rocksdb/rust-rocksdb for nextgraph
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42 lines
1.0 KiB
42 lines
1.0 KiB
// Copyright (c) Meta Platforms, Inc. and affiliates.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#include "db/blob/blob_contents.h"
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#include <cassert>
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#include "cache/cache_entry_roles.h"
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#include "cache/cache_helpers.h"
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#include "port/malloc.h"
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namespace ROCKSDB_NAMESPACE {
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size_t BlobContents::ApproximateMemoryUsage() const {
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size_t usage = 0;
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if (allocation_) {
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MemoryAllocator* const allocator = allocation_.get_deleter().allocator;
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if (allocator) {
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usage += allocator->UsableSize(allocation_.get(), data_.size());
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} else {
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#ifdef ROCKSDB_MALLOC_USABLE_SIZE
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usage += malloc_usable_size(allocation_.get());
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#else
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usage += data_.size();
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#endif
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}
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}
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#ifdef ROCKSDB_MALLOC_USABLE_SIZE
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usage += malloc_usable_size(const_cast<BlobContents*>(this));
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#else
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usage += sizeof(*this);
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#endif
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return usage;
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}
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} // namespace ROCKSDB_NAMESPACE
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