WaitAsync() [4/6]

Task< bool > System.Threading.SemaphoreSlim.WaitAsync ( int millisecondsTimeout, CancellationToken cancellationToken )

inline

Definition at line 300 of file SemaphoreSlim.cs.

    {
        CheckDispose();
        if (millisecondsTimeout < -1)
        {
            throw new ArgumentOutOfRangeException("millisecondsTimeout", millisecondsTimeout, SR.SemaphoreSlim_Wait_TimeoutWrong);
        }
        if (cancellationToken.IsCancellationRequested)
        {
            return Task.FromCanceled<bool>(cancellationToken);
        }
        lock (m_lockObjAndDisposed)
        {
            if (m_currentCount > 0)
            {
                m_currentCount--;
                if (m_waitHandle != null && m_currentCount == 0)
                {
                    m_waitHandle.Reset();
                }
                return Task.FromResult(result: true);
            }
            if (millisecondsTimeout == 0)
            {
                return Task.FromResult(result: false);
            }
            TaskNode taskNode = CreateAndAddAsyncWaiter();
            return (millisecondsTimeout == -1 && !cancellationToken.CanBeCanceled) ? taskNode : WaitUntilCountOrTimeoutAsync(taskNode, millisecondsTimeout, cancellationToken);
        }
    }

References System.cancellationToken, System.Threading.SemaphoreSlim.CheckDispose(), System.Threading.SemaphoreSlim.CreateAndAddAsyncWaiter(), System.Threading.Tasks.Task< TResult >.FromCanceled(), System.Threading.SemaphoreSlim.m_currentCount, System.Threading.SemaphoreSlim.m_lockObjAndDisposed, System.Threading.SemaphoreSlim.m_waitHandle, System.millisecondsTimeout, System.Threading.EventWaitHandle.Reset(), System.SR.SemaphoreSlim_Wait_TimeoutWrong, and System.Threading.SemaphoreSlim.WaitUntilCountOrTimeoutAsync().