/*

 * 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.

 */



#include "common/fdsan_fd.h"



namespace OHOS {

namespace Media {



FdsanFd::FdsanFd(int32_t fd)

{

    Reset(fd);

}



FdsanFd::~FdsanFd()

{

    Reset();

}



FdsanFd::FdsanFd(FdsanFd &&move)

{

    *this = std::move(move);

}



FdsanFd &FdsanFd::operator=(FdsanFd &&move)

{

    if (this == &move) {

        return *this;

    }

    Reset();

    if (move.fd_ != INVALID_FD) {

        fd_ = move.fd_;

        move.fd_ = INVALID_FD;

        // Acquire ownership of the presumably unowned fd.

        ExchangeTag(fd_, move.Tag(), Tag());

    }

    return *this;

}



int32_t FdsanFd::Get() const

{

    return fd_;

}



void FdsanFd::Reset(int32_t newFd)

{

    if (fd_ != INVALID_FD) {

        Close(fd_, Tag());

        fd_ = INVALID_FD;

    }

    if (newFd != INVALID_FD) {

        fd_ = newFd;

        // Acquire ownership of the presumably unowned fd.

        ExchangeTag(fd_, 0, Tag());

    }

}



// Use the address of object as the file tag

uint64_t FdsanFd::Tag()

{

    return reinterpret_cast<uint64_t>(this);

}



void FdsanFd::ExchangeTag(int32_t fd, uint64_t oldTag, uint64_t newTag)

{

#if !defined(CROSS_PLATFORM)

    if (&fdsan_exchange_owner_tag) {

        fdsan_exchange_owner_tag(fd, oldTag, newTag);

    }

#endif

}



int32_t FdsanFd::Close(int32_t fd, uint64_t tag)

{

#if !defined(CROSS_PLATFORM)

    if (&fdsan_close_with_tag) {

        return fdsan_close_with_tag(fd, tag);

    }

#else

    return close(fd);

#endif

}



}  // namespace Media

}  // namespace OHOS