Class ReadOnlySequenceAccessor

Represents factory of ReadOnlySequence<T> objects representing memory-mapped file content.

Inheritance

object

Disposable

ReadOnlySequenceAccessor

Implements

IReadOnlySequenceSource<byte>

IDisposable

ISupplier<ReadOnlySequence<byte>>

IFunctional<Func<ReadOnlySequence<byte>>>

Inherited Members

Disposable.Dispose()

Disposable.Dispose(IEnumerable<IDisposable>)

Disposable.DisposeAsync(IEnumerable<IAsyncDisposable>)

Disposable.Dispose<T>(ReadOnlySpan<T>)

Disposable.DisposeAsync(params IAsyncDisposable[])

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: DotNext.IO.MemoryMappedFiles

Assembly: DotNext.IO.dll

Syntax

public sealed class ReadOnlySequenceAccessor : Disposable, IReadOnlySequenceSource<byte>, IDisposable, ISupplier<ReadOnlySequence<byte>>, IFunctional<Func<ReadOnlySequence<byte>>>

Remarks

A sequence returned by Sequence property should not be accessed concurrently. For concurrent access, you need to obtain a new instance of ReadOnlySequenceAccessor class. The class uses lazy initialization of memory-mapped file segment every time when ReadOnlySequence<T> switching between segments.

Constructors

ReadOnlySequenceAccessor(FileStream, int)

Initializes a new accessor over memory-mapped file segments represented as ReadOnlySequence<T>.

Declaration

public ReadOnlySequenceAccessor(FileStream file, int segmentSize)

Parameters

Type	Name	Description
FileStream	file	The file stream.
int	segmentSize	The size of single segment, in bytes, that can be returned by ReadOnlySequence<T> as contiguous block of memory. So this parameter defines actual amount of occupied virtual memory.

Exceptions

Type	Condition
ArgumentOutOfRangeException	segmentSize is less than or equal to zero; or it's greater than file size.

ReadOnlySequenceAccessor(MemoryMappedFile, int, long)

Initializes a new accessor over memory-mapped file segments represented as ReadOnlySequence<T>.

Declaration

public ReadOnlySequenceAccessor(MemoryMappedFile file, int segmentSize, long size)

Parameters

Type	Name	Description
MemoryMappedFile	file	The memory-mapped file.
int	segmentSize	The size of single segment, in bytes, that can be returned by ReadOnlySequence<T> as contiguous block of memory. So this parameter defines actual amount of occupied virtual memory.
long	size	The observable length, in bytes, of memory-mapped file.

Exceptions

Type	Condition
ArgumentOutOfRangeException	segmentSize is less than or equal to zero; or size is less than or equal to zero; or segmentSize is greater than size.

Properties

Sequence

Gets the sequence of memory-mapped file fragments.

Declaration

public ReadOnlySequence<byte> Sequence { get; }

Property Value

Type	Description
ReadOnlySequence<byte>

Remarks

The sequence produced by this instance should not be accessed concurrently.

Exceptions

Type	Condition
ObjectDisposedException	This object has been disposed.

Methods

Dispose(bool)

Releases managed and unmanaged resources associated with this object.

Declaration

protected override void Dispose(bool disposing)

Parameters

Type	Name	Description
bool	disposing	true if called from Dispose(); false if called from finalizer ~Disposable().

Overrides

Disposable.Dispose(bool)

Implements

IReadOnlySequenceSource<T>

IDisposable

ISupplier<TResult>

IFunctional<TDelegate>

Extension Methods

BasicExtensions.As<T>(T)

BasicExtensions.GetUserData<T>(T)

BasicExtensions.IsBetween<T, TLowerBound, TUpperBound>(T, TLowerBound, TUpperBound)

BasicExtensions.IsOneOf<T>(T, ReadOnlySpan<T>)

ExpressionBuilder.Const<T>(T)

AsyncLockAcquisition.AcquireLockAsync<T>(T, CancellationToken)

AsyncLockAcquisition.AcquireLockAsync<T>(T, TimeSpan, CancellationToken)

AsyncLockAcquisition.AcquireReadLockAsync<T>(T, CancellationToken)

AsyncLockAcquisition.AcquireReadLockAsync<T>(T, TimeSpan, CancellationToken)

AsyncLockAcquisition.AcquireWriteLockAsync<T>(T, bool, CancellationToken)

AsyncLockAcquisition.AcquireWriteLockAsync<T>(T, bool, TimeSpan, CancellationToken)

AsyncLockAcquisition.AcquireWriteLockAsync<T>(T, CancellationToken)

AsyncLockAcquisition.AcquireWriteLockAsync<T>(T, TimeSpan, CancellationToken)

LockAcquisition.AcquireReadLock<T>(T)

LockAcquisition.AcquireReadLock<T>(T, TimeSpan)

LockAcquisition.AcquireUpgradeableReadLock<T>(T)

LockAcquisition.AcquireUpgradeableReadLock<T>(T, TimeSpan)

LockAcquisition.AcquireWriteLock<T>(T)

LockAcquisition.AcquireWriteLock<T>(T, TimeSpan)