/// <summary>
/// Acquires lock implemented by the synchronization object. This method blocks uses busy waiting until the lock has been acuired.
/// and throws exception if lock cannot be acqured.
/// </summary>
public static void Lock(ref InlineCasLock @lock)
{
while (!TryLock(ref @lock))
{
;
}
}
// /// <summary>
// /// Tries to acquire lock implemented by the synchronization object. This method should return as soon as possible.
// /// </summary>
// /// <param name="cancellationToken">Cancellation token</param>
// /// <returns><c>true</c> if lock has been successfully acquired; <c>false</c> otherwise.</returns>
// public Task<bool> TryLockAsync(CancellationToken cancellationToken) => Task.FromResult(TryLock());
//
// /// <summary>
// /// Acquires lock implemented by the synchronization object. This method blocks until lock has been acquired
// /// and throws exception if lock cannot be acqured.
// /// </summary>
// /// <param name="cancellationToken">Cancellation token</param>
// public async Task LockAsync(CancellationToken cancellationToken)
// {
// cancellationToken.ThrowIfCancellationRequested();
// for (var tryCount = 0; tryCount < ThreadBlockCycles; ++tryCount)
// {
// if (TryLock())
// {
// return;
// }
// }
// await LockAsync(cancellationToken).ConfigureAwait(false);
// }
/// <summary>
/// Tries to acquire lock implemented by the synchronization object. This method returns immidiately.
/// </summary>
/// <returns><c>true</c> if lock has been successfully acquired; <c>false</c> otherwise.</returns>
/// <exception cref="T:NCoreUtils.Sync.CaseLock.OutOfSyncException">Thrown if the instance contains invalid state.</exception>
public static bool TryLock(ref InlineCasLock @lock)
{
switch (Interlocked.CompareExchange(ref @lock._value, Locked, Free))
{
case Free:
return(true);
case Locked:
return(false);
default:
throw new CasLock.OutOfSyncException();
}
}
/// <summary>
/// Releases lock implemented by the synchronization object. This method returns immidiately.
/// </summary>
/// <exception cref="T:NCoreUtils.Sync.CaseLock.OutOfSyncException">Thrown if the instance contains invalid state.</exception>
/// <exception cref="T:System.InvalidOperationException">Thrown if the instance is not currently locked.</exception>
public static void Release(ref InlineCasLock @lock)
{
switch (Interlocked.CompareExchange(ref @lock._value, Free, Locked))
{
case Free:
throw new InvalidOperationException("Not locked");
case Locked:
return;
default:
throw new CasLock.OutOfSyncException();
}
}
/// <summary> /// Determines whether inline CAS lock is in <c>Locked</c> state. /// </summary> /// <param name="lock">Target lock.</param> /// <returns> /// <c>true</c> if inline CAS lock is in <c>Locked</c> state, <c>false</c> otherwise. /// </returns> public static bool IsLocked(ref InlineCasLock @lock) => Locked == @lock._value;
/// <summary> /// Initializes the specified inline CAS lock. /// </summary> /// <param name="lock">Target lock.</param> public static void Init(ref InlineCasLock @lock) => @lock._value = Free;
