gvisor.dev/gvisor@v0.0.0-20240520182842-f9d4d51c7e0f/test/util/cleanup.h (about)

     1  // Copyright 2018 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  #ifndef GVISOR_TEST_UTIL_CLEANUP_H_
    16  #define GVISOR_TEST_UTIL_CLEANUP_H_
    17  
    18  #include <functional>
    19  #include <utility>
    20  
    21  namespace gvisor {
    22  namespace testing {
    23  
    24  class Cleanup {
    25   public:
    26    Cleanup() : released_(true) {}
    27    explicit Cleanup(std::function<void()>&& callback) : cb_(callback) {}
    28  
    29    Cleanup(Cleanup&& other) {
    30      released_ = other.released_;
    31      cb_ = other.Release();
    32    }
    33  
    34    Cleanup& operator=(Cleanup&& other) {
    35      released_ = other.released_;
    36      cb_ = other.Release();
    37      return *this;
    38    }
    39  
    40    ~Cleanup() {
    41      if (!released_) {
    42        cb_();
    43      }
    44    }
    45  
    46    std::function<void()>&& Release() {
    47      released_ = true;
    48      return std::move(cb_);
    49    }
    50  
    51   private:
    52    Cleanup(Cleanup const& other) = delete;
    53  
    54    bool released_ = false;
    55    std::function<void(void)> cb_;
    56  };
    57  
    58  }  // namespace testing
    59  }  // namespace gvisor
    60  
    61  #endif  // GVISOR_TEST_UTIL_CLEANUP_H_