public static async Task InvalidExits()
{
using var rwLock = new AsyncReaderWriterLock();
Throws <SynchronizationLockException>(rwLock.ExitReadLock);
Throws <SynchronizationLockException>(rwLock.ExitUpgradeableReadLock);
Throws <SynchronizationLockException>(rwLock.ExitWriteLock);
await rwLock.EnterReadLockAsync(TimeSpan.FromMilliseconds(10));
Throws <SynchronizationLockException>(rwLock.ExitUpgradeableReadLock);
Throws <SynchronizationLockException>(rwLock.ExitWriteLock);
rwLock.ExitReadLock();
await rwLock.EnterUpgradeableReadLockAsync(TimeSpan.FromMilliseconds(10));
Throws <SynchronizationLockException>(rwLock.ExitReadLock);
Throws <SynchronizationLockException>(rwLock.ExitWriteLock);
rwLock.ExitUpgradeableReadLock();
await rwLock.EnterWriteLockAsync(TimeSpan.FromMilliseconds(10));
Throws <SynchronizationLockException>(rwLock.ExitReadLock);
Throws <SynchronizationLockException>(rwLock.ExitUpgradeableReadLock);
rwLock.ExitWriteLock();
}
public static void GracefulShutdown3()
{
using var @lock = new AsyncReaderWriterLock();
True(@lock.TryEnterWriteLock());
var acquisition1 = @lock.EnterReadLockAsync(CancellationToken.None);
False(acquisition1.IsCompleted);
var task = @lock.DisposeAsync();
False(task.IsCompleted);
var acquisition2 = @lock.EnterReadLockAsync(CancellationToken.None);
False(task.IsCompleted);
@lock.ExitWriteLock();
True(acquisition1.IsCompletedSuccessfully);
False(acquisition2.IsCompleted);
False(task.IsCompleted);
@lock.ExitReadLock();
True(acquisition2.IsFaulted);
True(task.IsCompletedSuccessfully);
Throws <ObjectDisposedException>(acquisition2.GetAwaiter().GetResult);
}
public static async Task WriterToReaderChain()
{
using var are = new AutoResetEvent(false);
using var rwLock = new AsyncReaderWriterLock();
await rwLock.EnterWriteLockAsync(DefaultTimeout);
var task = new TaskCompletionSource <bool>();
ThreadPool.QueueUserWorkItem(async state =>
{
False(await rwLock.TryEnterReadLockAsync(TimeSpan.FromMilliseconds(10)));
True(ThreadPool.QueueUserWorkItem(static ev => ev.Set(), are, false));
await rwLock.EnterReadLockAsync(DefaultTimeout);
rwLock.ExitReadLock();
task.SetResult(true);
});