Struct FdGuard 

pub struct FdGuard { /* private fields */ }

将系统 fd 包装为 RAII 守卫，确保 close(2) 被调用。

Implementations

impl FdGuard

pub fn new(fd: i32) -> Self

创建 fd 守卫。fd 必须是有效的打开文件描述符。

pub fn as_raw(&self) -> i32

获取原始 fd。

pub fn into_raw(self) -> i32

取出 fd 的所有权（不再由 Drop 关闭）。

Trait Implementations

impl Debug for FdGuard

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Drop for FdGuard

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.