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Diffstat (limited to 'src/csharp/Grpc.Core/Internal/AsyncCompletion.cs')
| -rw-r--r-- | src/csharp/Grpc.Core/Internal/AsyncCompletion.cs | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/src/csharp/Grpc.Core/Internal/AsyncCompletion.cs b/src/csharp/Grpc.Core/Internal/AsyncCompletion.cs new file mode 100644 index 0000000000..b78bb497fa --- /dev/null +++ b/src/csharp/Grpc.Core/Internal/AsyncCompletion.cs @@ -0,0 +1,95 @@ +#region Copyright notice and license + +// Copyright 2015, Google Inc. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +#endregion + +using System; +using System.Diagnostics; +using System.Runtime.CompilerServices; +using System.Runtime.InteropServices; +using System.Threading; +using System.Threading.Tasks; +using Grpc.Core.Internal; +using Grpc.Core.Utils; + +namespace Grpc.Core.Internal +{ + /// <summary> + /// If error != null, there's been an error or operation has been cancelled. + /// </summary> + internal delegate void AsyncCompletionDelegate(Exception error); + + /// <summary> + /// Helper for transforming AsyncCompletionDelegate into full-fledged Task. + /// </summary> + internal class AsyncCompletionTaskSource + { + readonly TaskCompletionSource<object> tcs = new TaskCompletionSource<object>(); + readonly AsyncCompletionDelegate completionDelegate; + + public AsyncCompletionTaskSource() + { + completionDelegate = new AsyncCompletionDelegate(HandleCompletion); + } + + public Task Task + { + get + { + return tcs.Task; + } + } + + public AsyncCompletionDelegate CompletionDelegate + { + get + { + return completionDelegate; + } + } + + private void HandleCompletion(Exception error) + { + if (error == null) + { + tcs.SetResult(null); + return; + } + if (error is OperationCanceledException) + { + tcs.SetCanceled(); + return; + } + tcs.SetException(error); + } + } + +}
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