xref: /commonlibrary/rust/ylong_runtime/ylong_io/src/sys/windows/handle.rs

// Copyright (c) 2023 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.

use std::os::windows::io::RawHandle;

use crate::sys::winapi::{CloseHandle, HANDLE};

/// Ensures that the handle can be closed correctly when it is not needed
#[derive(Debug)]
pub(crate) struct Handle(HANDLE);

impl Handle {
    pub(crate) fn new(handle: HANDLE) -> Self {
        Self(handle)
    }

    pub(crate) fn raw(&self) -> HANDLE {
        self.0
    }

    pub(crate) fn into_raw(self) -> RawHandle {
        let ret = self.0;
        // This is super important so that drop is not called!
        std::mem::forget(self);
        ret as RawHandle
    }
}

impl Drop for Handle {
    fn drop(&mut self) {
        unsafe { CloseHandle(self.0) };
    }
}