public async Task DifferentKeys_DontInterfere()
{
var @lock = new AsyncKeyedLock <int>();
await @lock.WriterLockAsync(0);
await @lock.WriterLockAsync(1);
}
public async Task WriteLocked_PreventsAnotherWriterLock()
{
var @lock = new AsyncKeyedLock <int>();
await @lock.WriterLockAsync(0);
Task <IDisposable> task = @lock.WriterLockAsync(0);
await AsyncHelper.NeverCompletesAsync(task);
}
public async Task LockReleased_WriteTakesPriorityOverRead()
{
var @lock = new AsyncKeyedLock <int>();
Task writeLock, readLock;
using (await @lock.WriterLockAsync(0))
{
readLock = @lock.ReaderLockAsync(0);
writeLock = @lock.WriterLockAsync(0);
}
await writeLock;
await AsyncHelper.NeverCompletesAsync(readLock);
}
public async Task ReadLocked_PreventsWriterLock()
{
var @lock = new AsyncKeyedLock <int>();
await @lock.ReaderLockAsync(0);
var task = @lock.WriterLockAsync(0);
await AsyncHelper.NeverCompletesAsync(task);
}
public async Task WriteLocked_Unlocked_PermitsAnotherWriterLock()
{
var @lock = new AsyncKeyedLock <int>();
var firstWriteLockTaken = new TaskCompletionSource <object>(TaskCreationOptions.RunContinuationsAsynchronously);
var releaseFirstWriteLock = new TaskCompletionSource <object>(TaskCreationOptions.RunContinuationsAsynchronously);
var task = Task.Run(async() =>
{
using (await @lock.WriterLockAsync(0))
{
firstWriteLockTaken.SetResult(null);
await releaseFirstWriteLock.Task;
}
});
await firstWriteLockTaken.Task;
Task <IDisposable> lockTask = @lock.WriterLockAsync(0);
Assert.False(lockTask.IsCompleted);
releaseFirstWriteLock.SetResult(null);
await lockTask;
}
public async Task ReaderLocked_ReaderReleased_ReaderAndWriterWaiting_DoesNotReleaseReaderOrWriter()
{
var @lock = new AsyncKeyedLock <int>();
Task readLock, writeLock;
await @lock.ReaderLockAsync(0);
using (await @lock.ReaderLockAsync(0))
{
writeLock = @lock.WriterLockAsync(0);
readLock = @lock.ReaderLockAsync(0);
}
await Task.WhenAll(AsyncHelper.NeverCompletesAsync(writeLock), AsyncHelper.NeverCompletesAsync(readLock));
}
public async Task Unlocked_PermitsWriterLock()
{
var @lock = new AsyncKeyedLock <int>();
await @lock.WriterLockAsync(0);
}
public async Task WriteLocked_NoWaiters()
{
var @lock = new AsyncKeyedLock <int>();
using (await @lock.WriterLockAsync(0)) { }
}