fc8dc48020
git-subtree-dir: third_party/abseil_cpp git-subtree-mainline:ffb2ae54begit-subtree-split:768eb2ca28
83 lines
2.3 KiB
C++
83 lines
2.3 KiB
C++
// Copyright 2018 The Abseil Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef ABSL_CONTAINER_INTERNAL_TRACKED_H_
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#define ABSL_CONTAINER_INTERNAL_TRACKED_H_
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#include <stddef.h>
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#include <memory>
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#include <utility>
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#include "absl/base/config.h"
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namespace absl {
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ABSL_NAMESPACE_BEGIN
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namespace container_internal {
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// A class that tracks its copies and moves so that it can be queried in tests.
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template <class T>
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class Tracked {
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public:
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Tracked() {}
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// NOLINTNEXTLINE(runtime/explicit)
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Tracked(const T& val) : val_(val) {}
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Tracked(const Tracked& that)
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: val_(that.val_),
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num_moves_(that.num_moves_),
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num_copies_(that.num_copies_) {
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++(*num_copies_);
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}
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Tracked(Tracked&& that)
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: val_(std::move(that.val_)),
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num_moves_(std::move(that.num_moves_)),
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num_copies_(std::move(that.num_copies_)) {
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++(*num_moves_);
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}
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Tracked& operator=(const Tracked& that) {
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val_ = that.val_;
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num_moves_ = that.num_moves_;
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num_copies_ = that.num_copies_;
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++(*num_copies_);
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}
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Tracked& operator=(Tracked&& that) {
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val_ = std::move(that.val_);
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num_moves_ = std::move(that.num_moves_);
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num_copies_ = std::move(that.num_copies_);
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++(*num_moves_);
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}
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const T& val() const { return val_; }
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friend bool operator==(const Tracked& a, const Tracked& b) {
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return a.val_ == b.val_;
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}
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friend bool operator!=(const Tracked& a, const Tracked& b) {
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return !(a == b);
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}
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size_t num_copies() { return *num_copies_; }
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size_t num_moves() { return *num_moves_; }
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private:
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T val_;
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std::shared_ptr<size_t> num_moves_ = std::make_shared<size_t>(0);
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std::shared_ptr<size_t> num_copies_ = std::make_shared<size_t>(0);
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};
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} // namespace container_internal
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ABSL_NAMESPACE_END
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} // namespace absl
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#endif // ABSL_CONTAINER_INTERNAL_TRACKED_H_
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