/// <summary>
/// Acquires lock implemented by the synchronization object. This method blocks until lock has been acquired
/// and throws exception if lock cannot be acqured within specified amount of time.
/// </summary>
/// <param name="lock">Target lock.</param>
/// <param name="timeout">Amount of time to acquire the lock within.</param>
/// <returns>
/// Task which is completed when lock has been acquired.
/// </returns>
public static async Task LockAsync(this ILockAsync @lock, TimeSpan timeout)
{
using (var cancellation = new CancellationTokenSource(timeout))
{
await @lock.LockAsync(cancellation.Token);
}
}
/// <summary>
/// Executes provided function as critical section, acquiring the specified lock, executing a statement, and then
/// releasing the lock.
/// </summary>
/// <param name="lock">Synchronization object to use.</param>
/// <param name="action">Asynchronous action to execute.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>
/// Task which is completed after the operation has been performed and the lock has been released.
/// </returns>
public static async Task SynchronizedAsync(this ILockAsync @lock, AsyncAction action, CancellationToken cancellationToken)
{
await @lock.LockAsync(cancellationToken);
try
{
await action.InvokeAsync(cancellationToken);
}
finally
{
@lock.Release();
}
}
/// <summary>
/// Executes provided function as critical section, acquiring the specified lock, executing a statement, and then
/// releasing the lock.
/// </summary>
/// <param name="lock">Synchronization object to use.</param>
/// <param name="func">Asynchronous function to execute.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>
/// Task which is completed after the operation has been performed and the lock has been released.
/// </returns>
public static async Task <T> SynchronizedAsync <T>(this ILockAsync @lock, AsyncFunc <T> func, CancellationToken cancellationToken)
{
await @lock.LockAsync(cancellationToken);
try
{
return(await func(cancellationToken));
}
finally
{
@lock.Release();
}
}
