YugabyteDB (2.13.0.0-b42, bfc6a6643e7399ac8a0e81d06a3ee6d6571b33ab)

// Licensed to the Apache Software Foundation (ASF) under one

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// to you under the Apache License, Version 2.0 (the

// "License"); you may not use this file except in compliance

// with the License.  You may obtain a copy of the License at

//

//   http://www.apache.org/licenses/LICENSE-2.0

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// specific language governing permissions and limitations

// under the License.

//

// The following only applies to changes made to this file as part of YugaByte development.

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// Portions Copyright (c) YugaByte, Inc.

//

// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except

// in compliance with the License.  You may obtain a copy of the License at

//

// http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software distributed under the License

// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express

// or implied.  See the License for the specific language governing permissions and limitations

// under the License.

//

#include "yb/util/locks.h"

#include "yb/util/malloc.h"

namespace yb {

size_t percpu_rwlock::memory_footprint_excluding_this() const {

  // Because locks_ is a dynamic array of non-trivially-destructable types,

  // the returned pointer from new[] isn't guaranteed to point at the start of

  // a memory block, rendering it useless for malloc_usable_size().

  //

  // Rather than replace locks_ with a vector or something equivalent, we'll

  // just measure the memory footprint using sizeof(), with the understanding

  // that we might be inaccurate due to malloc "slop".

  //

  // See https://code.google.com/p/address-sanitizer/issues/detail?id=395 for

  // more details.

  return n_cpus_ * sizeof(padded_lock);

}

size_t percpu_rwlock::memory_footprint_including_this() const {

  return malloc_usable_size(this) + memory_footprint_excluding_this();

}

} // namespace yb