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rust-rocksdb/db/blob/blob_contents.cc

43 lines
1.0 KiB

// Copyright (c) Meta Platforms, Inc. and affiliates.
// 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 "db/blob/blob_contents.h"
#include <cassert>
#include "cache/cache_entry_roles.h"
#include "cache/cache_helpers.h"
#include "port/malloc.h"
namespace ROCKSDB_NAMESPACE {
size_t BlobContents::ApproximateMemoryUsage() const {
size_t usage = 0;
if (allocation_) {
MemoryAllocator* const allocator = allocation_.get_deleter().allocator;
if (allocator) {
usage += allocator->UsableSize(allocation_.get(), data_.size());
} else {
#ifdef ROCKSDB_MALLOC_USABLE_SIZE
usage += malloc_usable_size(allocation_.get());
#else
usage += data_.size();
#endif
}
}
#ifdef ROCKSDB_MALLOC_USABLE_SIZE
usage += malloc_usable_size(const_cast<BlobContents*>(this));
#else
usage += sizeof(*this);
#endif
return usage;
}
} // namespace ROCKSDB_NAMESPACE