namespace BlueMine.Redmine
{
    public class AsyncLock
    {
        private readonly SemaphoreSlim _semaphore = new(1, 1);

        public async Task<IDisposable> LockAsync()
        {
            await _semaphore.WaitAsync();
            return new Disposable(() => _semaphore.Release());
        }

        private class Disposable : IDisposable
        {
            private readonly Action _action;

            public Disposable(Action action)
            {
                _action = action;
            }

            public void Dispose()
            {
                _action();
            }
        }
    }
}