pub struct Locked<T: FileLike>(ManuallyDrop<T>);Expand description
Locks a file securely (requires lockf)
This version takes ownership of the protected resource.
Not reentrant on Linux. That is, even the same thread cannot acquire the same file twice. BUT if there are two copies of this software in the same process, those copies can both lock the same file. This can happen if two different versions of the library are used, for example.
Tuple Fields§
§0: ManuallyDrop<T>Implementations§
Trait Implementations§
Auto Trait Implementations§
impl<T> Freeze for Locked<T>where
T: Freeze,
impl<T> RefUnwindSafe for Locked<T>where
T: RefUnwindSafe,
impl<T> Send for Locked<T>where
T: Send,
impl<T> Sync for Locked<T>where
T: Sync,
impl<T> Unpin for Locked<T>where
T: Unpin,
impl<T> UnwindSafe for Locked<T>where
T: UnwindSafe,
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
§impl<T> Instrument for T
impl<T> Instrument for T
§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
§impl<T> Source for T
impl<T> Source for T
§type Slice<'a> = <<T as Deref>::Target as Source>::Slice<'a>
where
T: 'a
type Slice<'a> = <<T as Deref>::Target as Source>::Slice<'a> where T: 'a
A type this
Source can be sliced into.§fn read<'a, Chunk>(&'a self, offset: usize) -> Option<Chunk>where
Chunk: Chunk<'a>,
fn read<'a, Chunk>(&'a self, offset: usize) -> Option<Chunk>where
Chunk: Chunk<'a>,
Read a chunk of bytes into an array. Returns
None when reading
out of bounds would occur. Read more§unsafe fn read_byte_unchecked(&self, offset: usize) -> u8
unsafe fn read_byte_unchecked(&self, offset: usize) -> u8
Read a byte without doing bounds checks. Read more
§fn slice(&self, range: Range<usize>) -> Option<<T as Source>::Slice<'_>>
fn slice(&self, range: Range<usize>) -> Option<<T as Source>::Slice<'_>>
Get a slice of the source at given range. This is analogous to
slice::get(range). Read more§unsafe fn slice_unchecked(
&self,
range: Range<usize>,
) -> <T as Source>::Slice<'_>
unsafe fn slice_unchecked( &self, range: Range<usize>, ) -> <T as Source>::Slice<'_>
Get a slice of the source at given range. This is analogous to
slice::get_unchecked(range). Read more§fn is_boundary(&self, index: usize) -> bool
fn is_boundary(&self, index: usize) -> bool
§fn find_boundary(&self, index: usize) -> usize
fn find_boundary(&self, index: usize) -> usize
For
&str sources attempts to find the closest char boundary at which source
can be sliced, starting from index. Read more