public async Task CanEnterLocksAync()
{
var myLock = new AsyncReaderWriterLockSlim();
await myLock.EnterReadLockAsync();
Assert.IsTrue(await myLock.TryEnterReadLockAsync(0));
Assert.IsFalse(await myLock.TryEnterWriteLockAsync(0));
myLock.ExitReadLock();
myLock.ExitReadLock();
await myLock.EnterWriteLockAsync();
Assert.IsFalse(await myLock.TryEnterReadLockAsync(0));
Assert.IsFalse(await myLock.TryEnterWriteLockAsync(0));
myLock.ExitWriteLock();
}
public async Task MixedSyncAndAsync()
{
var myLock = new AsyncReaderWriterLockSlim();
myLock.EnterReadLock();
await myLock.EnterReadLockAsync();
myLock.ExitReadLock();
myLock.ExitReadLock();
myLock.EnterWriteLock();
Assert.IsFalse(await myLock.TryEnterWriteLockAsync(10));
myLock.ExitWriteLock();
}
public async Task ReleasingOneOfTwoReadLocksDoesNotReleaseWaitingWriteAndReadLocks()
{
var myLock = new AsyncReaderWriterLockSlim();
await myLock.EnterReadLockAsync();
await myLock.EnterReadLockAsync();
var writeLockTask = myLock.TryEnterWriteLockAsync(500);
var readLockTask = myLock.TryEnterReadLockAsync(300);
// When releasing one of the two read locks, the waiting write lock should not
// be released, and also the waiting read lock should not be released because of
// the waiting write lock.
myLock.ExitReadLock();
Assert.IsFalse(await readLockTask);
Assert.IsFalse(await writeLockTask);
}
