Merge pull request #19792 from jtattermusch/csharp_ibufferwriter_serialization
C#: support serialization to IBufferWriterpull/20176/head
Jan Tattermusch
6 years ago
committed by
GitHub
commit
a1ad4800da
22 changed files with 977 additions and 174 deletions
@ -0,0 +1,207 @@ |
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#region Copyright notice and license |
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|
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// Copyright 2019 The gRPC Authors |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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|
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#endregion |
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|
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using System; |
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using Grpc.Core; |
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using Grpc.Core.Internal; |
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using Grpc.Core.Utils; |
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using NUnit.Framework; |
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|
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namespace Grpc.Core.Internal.Tests |
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{ |
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public class DefaultSerializationContextTest |
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{ |
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[TestCase] |
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public void CompleteAllowedOnlyOnce() |
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{ |
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using (var scope = NewDefaultSerializationContextScope()) |
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{ |
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var context = scope.Context; |
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var buffer = GetTestBuffer(10); |
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|
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context.Complete(buffer); |
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Assert.Throws(typeof(InvalidOperationException), () => context.Complete(buffer)); |
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Assert.Throws(typeof(InvalidOperationException), () => context.Complete()); |
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} |
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} |
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|
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[TestCase] |
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public void CompleteAllowedOnlyOnce2() |
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{ |
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using (var scope = NewDefaultSerializationContextScope()) |
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{ |
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var context = scope.Context; |
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context.Complete(); |
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Assert.Throws(typeof(InvalidOperationException), () => context.Complete(GetTestBuffer(10))); |
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Assert.Throws(typeof(InvalidOperationException), () => context.Complete()); |
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} |
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} |
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|
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[TestCase(0)] |
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[TestCase(1)] |
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[TestCase(10)] |
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[TestCase(100)] |
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[TestCase(1000)] |
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public void ByteArrayPayload(int payloadSize) |
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{ |
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using (var scope = NewDefaultSerializationContextScope()) |
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{ |
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var context = scope.Context; |
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var origPayload = GetTestBuffer(payloadSize); |
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context.Complete(origPayload); |
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var nativePayload = context.GetPayload().ToByteArray(); |
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CollectionAssert.AreEqual(origPayload, nativePayload); |
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} |
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} |
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|
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[TestCase(0)] |
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[TestCase(1)] |
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[TestCase(10)] |
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[TestCase(100)] |
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[TestCase(1000)] |
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public void BufferWriter_OneSegment(int payloadSize) |
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{ |
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using (var scope = NewDefaultSerializationContextScope()) |
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{ |
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var context = scope.Context; |
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var origPayload = GetTestBuffer(payloadSize); |
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var bufferWriter = context.GetBufferWriter(); |
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origPayload.AsSpan().CopyTo(bufferWriter.GetSpan(payloadSize)); |
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bufferWriter.Advance(payloadSize); |
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context.Complete(); |
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var nativePayload = context.GetPayload().ToByteArray(); |
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CollectionAssert.AreEqual(origPayload, nativePayload); |
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} |
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} |
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|
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[TestCase(0)] |
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[TestCase(1)] |
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[TestCase(10)] |
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[TestCase(100)] |
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[TestCase(1000)] |
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public void BufferWriter_OneSegment_GetMemory(int payloadSize) |
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{ |
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using (var scope = NewDefaultSerializationContextScope()) |
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{ |
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var context = scope.Context; |
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var origPayload = GetTestBuffer(payloadSize); |
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var bufferWriter = context.GetBufferWriter(); |
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origPayload.AsSpan().CopyTo(bufferWriter.GetMemory(payloadSize).Span); |
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bufferWriter.Advance(payloadSize); |
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context.Complete(); |
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var nativePayload = context.GetPayload().ToByteArray(); |
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CollectionAssert.AreEqual(origPayload, nativePayload); |
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} |
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} |
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[TestCase(1, 4)] // small slice size tests grpc_slice with inline data |
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[TestCase(10, 4)] |
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[TestCase(100, 4)] |
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[TestCase(1000, 4)] |
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[TestCase(1, 64)] // larger slice size tests allocated grpc_slices |
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[TestCase(10, 64)] |
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[TestCase(1000, 50)] |
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[TestCase(1000, 64)] |
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public void BufferWriter_MultipleSegments(int payloadSize, int maxSliceSize) |
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{ |
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using (var scope = NewDefaultSerializationContextScope()) |
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{ |
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var context = scope.Context; |
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var origPayload = GetTestBuffer(payloadSize); |
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var bufferWriter = context.GetBufferWriter(); |
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for (int offset = 0; offset < payloadSize; offset += maxSliceSize) |
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{ |
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var sliceSize = Math.Min(maxSliceSize, payloadSize - offset); |
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// we allocate last slice as too big intentionally to test that shrinking works |
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var dest = bufferWriter.GetSpan(maxSliceSize); |
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origPayload.AsSpan(offset, sliceSize).CopyTo(dest); |
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bufferWriter.Advance(sliceSize); |
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} |
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context.Complete(); |
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var nativePayload = context.GetPayload().ToByteArray(); |
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CollectionAssert.AreEqual(origPayload, nativePayload); |
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} |
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} |
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[TestCase] |
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public void ContextIsReusable() |
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{ |
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using (var scope = NewDefaultSerializationContextScope()) |
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{ |
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var context = scope.Context; |
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Assert.Throws(typeof(NullReferenceException), () => context.GetPayload()); |
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var origPayload1 = GetTestBuffer(10); |
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context.Complete(origPayload1); |
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CollectionAssert.AreEqual(origPayload1, context.GetPayload().ToByteArray()); |
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context.Reset(); |
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var origPayload2 = GetTestBuffer(20); |
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var bufferWriter = context.GetBufferWriter(); |
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origPayload2.AsSpan().CopyTo(bufferWriter.GetMemory(origPayload2.Length).Span); |
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bufferWriter.Advance(origPayload2.Length); |
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context.Complete(); |
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CollectionAssert.AreEqual(origPayload2, context.GetPayload().ToByteArray()); |
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context.Reset(); |
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Assert.Throws(typeof(NullReferenceException), () => context.GetPayload()); |
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} |
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} |
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[TestCase] |
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public void GetBufferWriterThrowsForCompletedContext() |
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{ |
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using (var scope = NewDefaultSerializationContextScope()) |
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{ |
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var context = scope.Context; |
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context.Complete(GetTestBuffer(10)); |
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Assert.Throws(typeof(InvalidOperationException), () => context.GetBufferWriter()); |
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} |
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} |
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private DefaultSerializationContext.UsageScope NewDefaultSerializationContextScope() |
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{ |
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return new DefaultSerializationContext.UsageScope(new DefaultSerializationContext()); |
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} |
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private byte[] GetTestBuffer(int length) |
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{ |
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var testBuffer = new byte[length]; |
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for (int i = 0; i < testBuffer.Length; i++) |
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{ |
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testBuffer[i] = (byte) i; |
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} |
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return testBuffer; |
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} |
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} |
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} |
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@ -0,0 +1,163 @@ |
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#region Copyright notice and license |
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|
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// Copyright 2019 The gRPC Authors |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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|
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#endregion |
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using System; |
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using Grpc.Core; |
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using Grpc.Core.Internal; |
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using Grpc.Core.Utils; |
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using NUnit.Framework; |
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namespace Grpc.Core.Internal.Tests |
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{ |
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public class SliceBufferSafeHandleTest |
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{ |
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[TestCase] |
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public void Complete_EmptyBuffer() |
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{ |
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using (var sliceBuffer = SliceBufferSafeHandle.Create()) |
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{ |
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sliceBuffer.Complete(); |
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CollectionAssert.AreEqual(new byte[0], sliceBuffer.ToByteArray()); |
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} |
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} |
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[TestCase] |
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public void Complete_TailSizeZero() |
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{ |
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using (var sliceBuffer = SliceBufferSafeHandle.Create()) |
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{ |
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var origPayload = GetTestBuffer(10); |
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origPayload.AsSpan().CopyTo(sliceBuffer.GetSpan(origPayload.Length)); |
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sliceBuffer.Advance(origPayload.Length); |
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// call complete where tail space size == 0 |
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sliceBuffer.Complete(); |
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CollectionAssert.AreEqual(origPayload, sliceBuffer.ToByteArray()); |
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} |
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} |
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[TestCase] |
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public void Complete_TruncateTailSpace() |
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{ |
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using (var sliceBuffer = SliceBufferSafeHandle.Create()) |
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{ |
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var origPayload = GetTestBuffer(10); |
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var dest = sliceBuffer.GetSpan(origPayload.Length + 10); |
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origPayload.AsSpan().CopyTo(dest); |
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sliceBuffer.Advance(origPayload.Length); |
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// call complete where tail space needs to be truncated |
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sliceBuffer.Complete(); |
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CollectionAssert.AreEqual(origPayload, sliceBuffer.ToByteArray()); |
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} |
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} |
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[TestCase] |
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public void SliceBufferIsReusable() |
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{ |
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using (var sliceBuffer = SliceBufferSafeHandle.Create()) |
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{ |
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var origPayload = GetTestBuffer(10); |
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origPayload.AsSpan().CopyTo(sliceBuffer.GetSpan(origPayload.Length)); |
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sliceBuffer.Advance(origPayload.Length); |
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sliceBuffer.Complete(); |
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CollectionAssert.AreEqual(origPayload, sliceBuffer.ToByteArray()); |
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sliceBuffer.Reset(); |
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var origPayload2 = GetTestBuffer(20); |
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origPayload2.AsSpan().CopyTo(sliceBuffer.GetSpan(origPayload2.Length)); |
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sliceBuffer.Advance(origPayload2.Length); |
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sliceBuffer.Complete(); |
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CollectionAssert.AreEqual(origPayload2, sliceBuffer.ToByteArray()); |
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sliceBuffer.Reset(); |
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CollectionAssert.AreEqual(new byte[0], sliceBuffer.ToByteArray()); |
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} |
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} |
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[TestCase] |
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public void SliceBuffer_SizeHintZero() |
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{ |
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using (var sliceBuffer = SliceBufferSafeHandle.Create()) |
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{ |
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var destSpan = sliceBuffer.GetSpan(0); |
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Assert.IsTrue(destSpan.Length > 0); // some non-zero size memory is made available |
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sliceBuffer.Reset(); |
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var destMemory = sliceBuffer.GetMemory(0); |
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Assert.IsTrue(destMemory.Length > 0); |
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} |
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} |
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[TestCase(0)] |
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[TestCase(1000)] |
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public void SliceBuffer_BigPayload(int sizeHint) |
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{ |
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using (var sliceBuffer = SliceBufferSafeHandle.Create()) |
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{ |
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var bigPayload = GetTestBuffer(4 * 1024 * 1024); |
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int offset = 0; |
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while (offset < bigPayload.Length) |
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{ |
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var destSpan = sliceBuffer.GetSpan(sizeHint); |
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int copySize = Math.Min(destSpan.Length, bigPayload.Length - offset); |
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bigPayload.AsSpan(offset, copySize).CopyTo(destSpan); |
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sliceBuffer.Advance(copySize); |
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offset += copySize; |
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} |
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sliceBuffer.Complete(); |
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CollectionAssert.AreEqual(bigPayload, sliceBuffer.ToByteArray()); |
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} |
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} |
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[TestCase] |
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public void SliceBuffer_NegativeSizeHint() |
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{ |
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using (var sliceBuffer = SliceBufferSafeHandle.Create()) |
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{ |
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Assert.Throws(typeof(ArgumentException), () => sliceBuffer.GetSpan(-1)); |
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Assert.Throws(typeof(ArgumentException), () => sliceBuffer.GetMemory(-1)); |
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} |
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} |
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[TestCase] |
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public void SliceBuffer_AdvanceBadArg() |
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{ |
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using (var sliceBuffer = SliceBufferSafeHandle.Create()) |
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{ |
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int size = 10; |
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var destSpan = sliceBuffer.GetSpan(size); |
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Assert.Throws(typeof(ArgumentException), () => sliceBuffer.Advance(size + 1)); |
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Assert.Throws(typeof(ArgumentException), () => sliceBuffer.Advance(-1)); |
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} |
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} |
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private byte[] GetTestBuffer(int length) |
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{ |
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var testBuffer = new byte[length]; |
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for (int i = 0; i < testBuffer.Length; i++) |
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{ |
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testBuffer[i] = (byte) i; |
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} |
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return testBuffer; |
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} |
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} |
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} |
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@ -0,0 +1,166 @@ |
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#region Copyright notice and license |
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|
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// Copyright 2019 The gRPC Authors |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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|
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#endregion |
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|
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using System; |
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using System.Buffers; |
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using System.Runtime.InteropServices; |
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using Grpc.Core; |
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using Grpc.Core.Logging; |
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using Grpc.Core.Utils; |
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namespace Grpc.Core.Internal |
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{ |
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/// <summary> |
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/// Represents grpc_slice_buffer with some extra utility functions to allow |
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/// writing data to it using the <c>IBufferWriter</c> interface. |
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/// </summary> |
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internal class SliceBufferSafeHandle : SafeHandleZeroIsInvalid, IBufferWriter<byte> |
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{ |
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const int DefaultTailSpaceSize = 4096; // default buffer to allocate if no size hint is provided |
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static readonly NativeMethods Native = NativeMethods.Get(); |
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static readonly ILogger Logger = GrpcEnvironment.Logger.ForType<SliceBufferSafeHandle>(); |
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public static readonly SliceBufferSafeHandle NullInstance = new SliceBufferSafeHandle(); |
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private IntPtr tailSpacePtr; |
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private int tailSpaceLen; |
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private SliceMemoryManager memoryManagerLazy; |
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private SliceBufferSafeHandle() |
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{ |
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} |
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public static SliceBufferSafeHandle Create() |
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{ |
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return Native.grpcsharp_slice_buffer_create(); |
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} |
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public IntPtr Handle |
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{ |
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get |
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{ |
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return handle; |
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} |
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} |
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public void Advance(int count) |
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{ |
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GrpcPreconditions.CheckArgument(count >= 0); |
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GrpcPreconditions.CheckArgument(tailSpacePtr != IntPtr.Zero || count == 0); |
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GrpcPreconditions.CheckArgument(tailSpaceLen >= count); |
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tailSpaceLen = tailSpaceLen - count; |
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tailSpacePtr += count; |
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memoryManagerLazy?.Reset(); |
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} |
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// provides access to the "tail space" of this buffer. |
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// Use GetSpan when possible for better efficiency. |
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public Memory<byte> GetMemory(int sizeHint = 0) |
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{ |
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EnsureBufferSpace(sizeHint); |
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if (memoryManagerLazy == null) |
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{ |
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memoryManagerLazy = new SliceMemoryManager(); |
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} |
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memoryManagerLazy.Reset(new Slice(tailSpacePtr, tailSpaceLen)); |
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return memoryManagerLazy.Memory; |
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} |
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// provides access to the "tail space" of this buffer. |
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public unsafe Span<byte> GetSpan(int sizeHint = 0) |
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{ |
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EnsureBufferSpace(sizeHint); |
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return new Span<byte>(tailSpacePtr.ToPointer(), tailSpaceLen); |
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} |
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public void Complete() |
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{ |
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AdjustTailSpace(0); |
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} |
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|
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// resets the data contained by this slice buffer |
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public void Reset() |
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{ |
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// deletes all the data in the slice buffer |
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tailSpacePtr = IntPtr.Zero; |
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tailSpaceLen = 0; |
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memoryManagerLazy?.Reset(); |
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Native.grpcsharp_slice_buffer_reset_and_unref(this); |
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} |
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|
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// copies the content of the slice buffer to a newly allocated byte array |
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// Note that this method has a relatively high overhead and should maily be used for testing. |
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public byte[] ToByteArray() |
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{ |
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ulong sliceCount = Native.grpcsharp_slice_buffer_slice_count(this).ToUInt64(); |
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|
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Slice[] slices = new Slice[sliceCount]; |
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int totalLen = 0; |
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for (int i = 0; i < (int) sliceCount; i++) |
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{ |
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Native.grpcsharp_slice_buffer_slice_peek(this, new UIntPtr((ulong) i), out UIntPtr sliceLen, out IntPtr dataPtr); |
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slices[i] = new Slice(dataPtr, (int) sliceLen.ToUInt64()); |
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totalLen += (int) sliceLen.ToUInt64(); |
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|
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} |
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var result = new byte[totalLen]; |
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int offset = 0; |
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for (int i = 0; i < (int) sliceCount; i++) |
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{ |
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slices[i].ToSpanUnsafe().CopyTo(result.AsSpan(offset, slices[i].Length)); |
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offset += slices[i].Length; |
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} |
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GrpcPreconditions.CheckState(totalLen == offset); |
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return result; |
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} |
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|
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private void EnsureBufferSpace(int sizeHint) |
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{ |
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GrpcPreconditions.CheckArgument(sizeHint >= 0); |
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if (sizeHint == 0) |
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{ |
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// if no hint is provided, keep the available space within some "reasonable" boundaries. |
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// This is quite a naive approach which could use some fine-tuning, but currently in most case we know |
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// the required buffer size in advance anyway, so this approach seems good enough for now. |
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if (tailSpaceLen < DefaultTailSpaceSize / 2) |
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{ |
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AdjustTailSpace(DefaultTailSpaceSize); |
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} |
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} |
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else if (tailSpaceLen < sizeHint) |
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{ |
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// if hint is provided, always make sure we provide at least that much space |
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AdjustTailSpace(sizeHint); |
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} |
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} |
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|
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// make sure there's exactly requestedSize bytes of continguous buffer space at the end of this slice buffer |
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private void AdjustTailSpace(int requestedSize) |
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{ |
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GrpcPreconditions.CheckArgument(requestedSize >= 0); |
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tailSpacePtr = Native.grpcsharp_slice_buffer_adjust_tail_space(this, new UIntPtr((ulong) tailSpaceLen), new UIntPtr((ulong) requestedSize)); |
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tailSpaceLen = requestedSize; |
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} |
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protected override bool ReleaseHandle() |
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{ |
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Native.grpcsharp_slice_buffer_destroy(handle); |
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return true; |
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} |
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} |
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} |
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@ -0,0 +1,65 @@ |
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#region Copyright notice and license |
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|
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// Copyright 2019 The gRPC Authors |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
||||
// you may not use this file except in compliance with the License. |
||||
// You may obtain a copy of the License at |
||||
// |
||||
// http://www.apache.org/licenses/LICENSE-2.0 |
||||
// |
||||
// Unless required by applicable law or agreed to in writing, software |
||||
// distributed under the License is distributed on an "AS IS" BASIS, |
||||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
||||
// See the License for the specific language governing permissions and |
||||
// limitations under the License. |
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|
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#endregion |
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|
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using Grpc.Core.Utils; |
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using System; |
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using System.Threading; |
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|
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using System.Buffers; |
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|
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namespace Grpc.Core.Internal |
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{ |
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// Allow creating instances of Memory<byte> from Slice. |
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// Represents a chunk of native memory, but doesn't manage its lifetime. |
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// Instances of this class are reuseable - they can be reset to point to a different memory chunk. |
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// That is important to make the instances cacheable (rather then creating new instances |
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// the old ones will be reused to reduce GC pressure). |
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internal class SliceMemoryManager : MemoryManager<byte> |
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{ |
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private Slice slice; |
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|
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public void Reset(Slice slice) |
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{ |
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this.slice = slice; |
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} |
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|
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public void Reset() |
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{ |
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Reset(new Slice(IntPtr.Zero, 0)); |
||||
} |
||||
|
||||
public override Span<byte> GetSpan() |
||||
{ |
||||
return slice.ToSpanUnsafe(); |
||||
} |
||||
|
||||
public override MemoryHandle Pin(int elementIndex = 0) |
||||
{ |
||||
throw new NotSupportedException(); |
||||
} |
||||
|
||||
public override void Unpin() |
||||
{ |
||||
} |
||||
|
||||
protected override void Dispose(bool disposing) |
||||
{ |
||||
// NOP |
||||
} |
||||
} |
||||
} |
||||
Loading…
Reference in new issue