Abseil Common Libraries (C++) (grcp 依赖)
https://abseil.io/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
83 lines
2.3 KiB
83 lines
2.3 KiB
// Copyright 2018 The Abseil Authors. |
|
// |
|
// 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 |
|
// |
|
// https://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. |
|
|
|
#ifndef ABSL_CONTAINER_INTERNAL_TRACKED_H_ |
|
#define ABSL_CONTAINER_INTERNAL_TRACKED_H_ |
|
|
|
#include <stddef.h> |
|
|
|
#include <memory> |
|
#include <utility> |
|
|
|
#include "absl/base/config.h" |
|
|
|
namespace absl { |
|
ABSL_NAMESPACE_BEGIN |
|
namespace container_internal { |
|
|
|
// A class that tracks its copies and moves so that it can be queried in tests. |
|
template <class T> |
|
class Tracked { |
|
public: |
|
Tracked() {} |
|
// NOLINTNEXTLINE(runtime/explicit) |
|
Tracked(const T& val) : val_(val) {} |
|
Tracked(const Tracked& that) |
|
: val_(that.val_), |
|
num_moves_(that.num_moves_), |
|
num_copies_(that.num_copies_) { |
|
++(*num_copies_); |
|
} |
|
Tracked(Tracked&& that) |
|
: val_(std::move(that.val_)), |
|
num_moves_(std::move(that.num_moves_)), |
|
num_copies_(std::move(that.num_copies_)) { |
|
++(*num_moves_); |
|
} |
|
Tracked& operator=(const Tracked& that) { |
|
val_ = that.val_; |
|
num_moves_ = that.num_moves_; |
|
num_copies_ = that.num_copies_; |
|
++(*num_copies_); |
|
} |
|
Tracked& operator=(Tracked&& that) { |
|
val_ = std::move(that.val_); |
|
num_moves_ = std::move(that.num_moves_); |
|
num_copies_ = std::move(that.num_copies_); |
|
++(*num_moves_); |
|
} |
|
|
|
const T& val() const { return val_; } |
|
|
|
friend bool operator==(const Tracked& a, const Tracked& b) { |
|
return a.val_ == b.val_; |
|
} |
|
friend bool operator!=(const Tracked& a, const Tracked& b) { |
|
return !(a == b); |
|
} |
|
|
|
size_t num_copies() { return *num_copies_; } |
|
size_t num_moves() { return *num_moves_; } |
|
|
|
private: |
|
T val_; |
|
std::shared_ptr<size_t> num_moves_ = std::make_shared<size_t>(0); |
|
std::shared_ptr<size_t> num_copies_ = std::make_shared<size_t>(0); |
|
}; |
|
|
|
} // namespace container_internal |
|
ABSL_NAMESPACE_END |
|
} // namespace absl |
|
|
|
#endif // ABSL_CONTAINER_INTERNAL_TRACKED_H_
|
|
|