Struct ManyReadersOneWriterSynchronizer

This struct is for ADVANCED SYSTEM use-cases. DEVELOPERS: do not use this in a business application code. Represents an efficient SpinWait/Yield-based lock that allows many readers to operate concurrently and only one single concurrent writer. This struct must be used ONLY with a very fast/tight operations that do not block on IO and other locks, and are expected to complete under a tenth fraction of a second. Warning: this lock CAN NOT be held for longer than 5 hrs by design. DO NOT use this lock with IO-dependent operations. This is not really a limitation as this class is used to guard operations which are very fast (fractions of a second) and should fail faster otherwise. This lock IS NOT REENTRANT!

Inherited Members
System.ValueType.Equals(System.Object)
System.ValueType.GetHashCode()
System.ValueType.ToString()
System.Object.Equals(System.Object, System.Object)
System.Object.GetType()
System.Object.ReferenceEquals(System.Object, System.Object)
Namespace: Azos.Platform
Assembly: Azos.dll
Syntax
public struct ManyReadersOneWriterSynchronizer

Methods

GetReadLock(Func<Object, Boolean>, Object)

Obtains a read lock returning true on success. Many threads may obtain a read lock at the same time, however a single write lock excludes any read locks, corollary any single read lock held excludes anyone obtaining a write lock. False is returned if cancel func was supplied and returned true to cancel-out the waiting

Declaration
public bool GetReadLock(Func<object, bool> cancel = null, object cancelContext = null)
Parameters
Type Name Description
System.Func<System.Object, System.Boolean> cancel
System.Object cancelContext
Returns
Type Description
System.Boolean

GetWriteLock(Func<Object, Boolean>, Object)

Obtains a write lock returning true on success. Only one thread may hold a write lock at a time, and noone else can obtain a read lock until the write lock is released. False is returned if cancel func was supplied and returned true to cancel-out the waiting

Declaration
public bool GetWriteLock(Func<object, bool> cancel = null, object cancelContext = null)
Parameters
Type Name Description
System.Func<System.Object, System.Boolean> cancel
System.Object cancelContext
Returns
Type Description
System.Boolean

ReleaseReadLock()

Releases the read lock that was previously obtained by a call to GetReadLock()

Declaration
public void ReleaseReadLock()

ReleaseWriteLock()

Releases the write lock that was previously obtained by a call to GetWriteLock()

Declaration
public void ReleaseWriteLock()

TryGetWriteLock()

Tries to obtain the write lock returning true on success, false if lock could not be taken - either someone reads or writes. Only one thread may hold a write lock at a time

Declaration
public bool TryGetWriteLock()
Returns
Type Description
System.Boolean

Extension Methods