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#region Copyright notice and license
// Copyright 2018 The gRPC Authors
//
// 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.
#endregion
using Grpc.Core.Utils;
using System;
using System.Threading;
namespace Grpc.Core.Internal
{
internal class DefaultDeserializationContext : DeserializationContext
{
static readonly ThreadLocal<DefaultDeserializationContext> threadLocalInstance =
new ThreadLocal<DefaultDeserializationContext>(() => new DefaultDeserializationContext(), false);
byte[] payload;
bool alreadyCalledPayloadAsNewBuffer;
public DefaultDeserializationContext()
{
Reset();
}
public override int PayloadLength => payload.Length;
public override byte[] PayloadAsNewBuffer()
{
GrpcPreconditions.CheckState(!alreadyCalledPayloadAsNewBuffer);
alreadyCalledPayloadAsNewBuffer = true;
return payload;
}
public void Initialize(byte[] payload)
{
this.payload = GrpcPreconditions.CheckNotNull(payload);
this.alreadyCalledPayloadAsNewBuffer = false;
}
public void Reset()
{
this.payload = null;
this.alreadyCalledPayloadAsNewBuffer = true; // mark payload as read
}
public static DefaultDeserializationContext GetInitializedThreadLocal(byte[] payload)
{
var instance = threadLocalInstance.Value;
instance.Initialize(payload);
return instance;
}
}
}
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