Struct nebari::io::memory::MemoryFile

source · [−]
pub struct MemoryFile { /* private fields */ }
Expand description

A fake “file” represented by an in-memory buffer. This should only be used in testing, as this database format is not optimized for memory efficiency.

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Returns the unique ID of this file. Only unique within the manager it was opened from. Read more

Returns the path to the file.

Returns the length of the file.

Synchronizes data and metadata to the final destination. This calls std::fs::File::sync_all() on files, which ensures all filesystem metadata (such as newly allocated blocks) and data is synchronized to the destination device. Read more

Safely closes the file after flushing any pending operations to disk.

The file manager that synchronizes file access across threads.

Opens a file at path with read-only permission.

Opens or creates a file at path, positioning the cursor at the end of the file.

Opens a file at path with read-only permission.

Opens or creates a file at path, positioning the cursor at the end of the file.

Returns the id of the file assigned from the file manager.

Replaces the current file with the file located at path atomically.

Closes the file. This may not actually close the underlying file, depending on what other tasks have access to the underlying file as well. Read more

Executes an operation and returns the results.

Pull some bytes from this source into the specified buffer, returning how many bytes were read. Read more

Like read, except that it reads into a slice of buffers. Read more

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

Determines if this Reader has an efficient read_vectored implementation. Read more

Read all bytes until EOF in this source, placing them into buf. Read more

Read all bytes until EOF in this source, appending them to buf. Read more

Read the exact number of bytes required to fill buf. Read more

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

Pull some bytes from this source into the specified buffer. Read more

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

Read the exact number of bytes required to fill buf. Read more

Creates a “by reference” adaptor for this instance of Read. Read more

Transforms this Read instance to an Iterator over its bytes. Read more

Creates an adapter which will chain this stream with another. Read more

Creates an adapter which will read at most limit bytes from it. Read more

Seek to an offset, in bytes, in a stream. Read more

Rewind to the beginning of a stream. Read more

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

Returns the length of this stream (in bytes). Read more

Returns the current seek position from the start of the stream. Read more

Write a buffer into this writer, returning how many bytes were written. Read more

Flush this output stream, ensuring that all intermediately buffered contents reach their destination. Read more

Like write, except that it writes from a slice of buffers. Read more

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

Determines if this Writer has an efficient write_vectored implementation. Read more

Attempts to write an entire buffer into this writer. Read more

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

Attempts to write multiple buffers into this writer. Read more

Writes a formatted string into this writer, returning any error encountered. Read more

Creates a “by reference” adapter for this instance of Write. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Returns the argument unchanged.

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

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

Calls U::from(self).

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

Reads an unsigned 8 bit integer from the underlying reader. Read more

Reads a signed 8 bit integer from the underlying reader. Read more

Reads an unsigned 16 bit integer from the underlying reader. Read more

Reads a signed 16 bit integer from the underlying reader. Read more

Reads an unsigned 24 bit integer from the underlying reader. Read more

Reads a signed 24 bit integer from the underlying reader. Read more

Reads an unsigned 32 bit integer from the underlying reader. Read more

Reads a signed 32 bit integer from the underlying reader. Read more

Reads an unsigned 48 bit integer from the underlying reader. Read more

Reads a signed 48 bit integer from the underlying reader. Read more

Reads an unsigned 64 bit integer from the underlying reader. Read more

Reads a signed 64 bit integer from the underlying reader. Read more

Reads an unsigned 128 bit integer from the underlying reader. Read more

Reads a signed 128 bit integer from the underlying reader. Read more

Reads an unsigned n-bytes integer from the underlying reader. Read more

Reads a signed n-bytes integer from the underlying reader. Read more

Reads an unsigned n-bytes integer from the underlying reader.

Reads a signed n-bytes integer from the underlying reader.

Reads a IEEE754 single-precision (4 bytes) floating point number from the underlying reader. Read more

Reads a IEEE754 double-precision (8 bytes) floating point number from the underlying reader. Read more

Reads a sequence of unsigned 16 bit integers from the underlying reader. Read more

Reads a sequence of unsigned 32 bit integers from the underlying reader. Read more

Reads a sequence of unsigned 64 bit integers from the underlying reader. Read more

Reads a sequence of unsigned 128 bit integers from the underlying reader. Read more

Reads a sequence of signed 8 bit integers from the underlying reader. Read more

Reads a sequence of signed 16 bit integers from the underlying reader. Read more

Reads a sequence of signed 32 bit integers from the underlying reader. Read more

Reads a sequence of signed 64 bit integers from the underlying reader. Read more

Reads a sequence of signed 128 bit integers from the underlying reader. Read more

Reads a sequence of IEEE754 single-precision (4 bytes) floating point numbers from the underlying reader. Read more

👎 Deprecated since 1.2.0:

please use read_f32_into instead

DEPRECATED. Read more

Reads a sequence of IEEE754 double-precision (8 bytes) floating point numbers from the underlying reader. Read more

👎 Deprecated since 1.2.0:

please use read_f64_into instead

DEPRECATED. Read more

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

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

Uses borrowed data to replace owned data, usually by cloning. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more

Writes an unsigned 8 bit integer to the underlying writer. Read more

Writes a signed 8 bit integer to the underlying writer. Read more

Writes an unsigned 16 bit integer to the underlying writer. Read more

Writes a signed 16 bit integer to the underlying writer. Read more

Writes an unsigned 24 bit integer to the underlying writer. Read more

Writes a signed 24 bit integer to the underlying writer. Read more

Writes an unsigned 32 bit integer to the underlying writer. Read more

Writes a signed 32 bit integer to the underlying writer. Read more

Writes an unsigned 48 bit integer to the underlying writer. Read more

Writes a signed 48 bit integer to the underlying writer. Read more

Writes an unsigned 64 bit integer to the underlying writer. Read more

Writes a signed 64 bit integer to the underlying writer. Read more

Writes an unsigned 128 bit integer to the underlying writer.

Writes a signed 128 bit integer to the underlying writer.

Writes an unsigned n-bytes integer to the underlying writer. Read more

Writes a signed n-bytes integer to the underlying writer. Read more

Writes an unsigned n-bytes integer to the underlying writer. Read more

Writes a signed n-bytes integer to the underlying writer. Read more

Writes a IEEE754 single-precision (4 bytes) floating point number to the underlying writer. Read more

Writes a IEEE754 double-precision (8 bytes) floating point number to the underlying writer. Read more