/*

 * Copyright (c) 2025 Huawei Device Co., Ltd.

 * 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.

 */



#ifndef FDSAN_FD_H

#define FDSAN_FD_H



#include <cerrno>

#include <cstdio>

#include <fcntl.h>

#include <unistd.h>

#include <utility>



namespace OHOS {

namespace Media {



class FdsanFd {

public:

    FdsanFd() = default;

    explicit FdsanFd(int32_t fd);

    ~FdsanFd();

    FdsanFd(const FdsanFd &copy) = delete;

    FdsanFd(FdsanFd &&move);

    FdsanFd &operator=(const FdsanFd &copy) = delete;

    FdsanFd &operator=(FdsanFd &&move);



    int32_t Get() const;

    void Reset(int32_t newFd = INVALID_FD);



private:

    static void ExchangeTag(int32_t fd, uint64_t oldTag, uint64_t newTag);

    static int32_t Close(int32_t fd, uint64_t tag);

    // Use the address of object as the file tag

    uint64_t Tag();

    int32_t fd_ = INVALID_FD;

    static constexpr int32_t INVALID_FD = -1;

};

}  // namespace Media

}  // namespace OHOS

#endif  // FDSAN_FD_H