Struct FilePagerSource

Source

pub struct FilePagerSource { /* private fields */ }

Expand description

File-backed PagerSource using std::fs::File seek + read.

Opens a new file descriptor for each read_bytes_at call, which is safe across threads but not optimal for high-frequency reads. For throughput- critical use cases, prefer MmapPagerSource (requires mmap feature).

Implementations§

Source §

impl FilePagerSource

Source

pub fn open(path: impl Into<PathBuf>) -> Result<Self, RuntimeError>

Open a file-backed pager source at path.

Reads the file metadata to determine total size; fails if the file cannot be opened or its metadata cannot be queried.

Trait Implementations§

Source §

impl PagerSource for FilePagerSource

Source §

fn read_bytes_at(&self, offset: u64, out: &mut [u8]) -> Result<(), RuntimeError>

Read exactly out.len() bytes starting at offset into out. Read more

Source §

fn total_size_bytes(&self) -> u64

Total size of the backing store in bytes.

Auto Trait Implementations§

§

impl UnwindSafe for FilePagerSource

Blanket Implementations§

Source §

impl<T> Any for T
where T: 'static + ?Sized,

Source §

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

Source §

impl<T> Borrow<T> for T
where T: ?Sized,

Source §

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

Source §

impl<T> BorrowMut<T> for T
where T: ?Sized,

Source §

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

Source §

impl<T> From<T> for T

Source §

fn from(t: T) -> T

Returns the argument unchanged.

Source §

impl<T> Instrument for T

Source §

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

Source §

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

Source §

impl<T, U> Into for T
where U: From<T>,

Source §

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Source §

impl<T> IntoEither for T

Source §

fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

Source §

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

Source §