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#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.Collections.Concurrent;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using Grpc.Core.Logging;
using Grpc.Core.Utils;
namespace Grpc.Core.Internal
{
internal delegate void OpCompletionDelegate(bool success);
internal delegate void BatchCompletionDelegate(bool success, BatchContextSafeHandle ctx);
internal delegate void RequestCallCompletionDelegate(bool success, RequestCallContextSafeHandle ctx);
internal class CompletionRegistry
{
static readonly ILogger Logger = GrpcEnvironment.Logger.ForType<CompletionRegistry>();
readonly GrpcEnvironment environment;
readonly ConcurrentDictionary<IntPtr, OpCompletionDelegate> dict = new ConcurrentDictionary<IntPtr, OpCompletionDelegate>(new IntPtrComparer());
public CompletionRegistry(GrpcEnvironment environment)
{
this.environment = environment;
}
public void Register(IntPtr key, OpCompletionDelegate callback)
{
environment.DebugStats.PendingBatchCompletions.Increment();
GrpcPreconditions.CheckState(dict.TryAdd(key, callback));
}
public void RegisterBatchCompletion(BatchContextSafeHandle ctx, BatchCompletionDelegate callback)
{
OpCompletionDelegate opCallback = ((success) => HandleBatchCompletion(success, ctx, callback));
Register(ctx.Handle, opCallback);
}
public void RegisterRequestCallCompletion(RequestCallContextSafeHandle ctx, RequestCallCompletionDelegate callback)
{
OpCompletionDelegate opCallback = ((success) => HandleRequestCallCompletion(success, ctx, callback));
Register(ctx.Handle, opCallback);
}
public OpCompletionDelegate Extract(IntPtr key)
{
OpCompletionDelegate value;
GrpcPreconditions.CheckState(dict.TryRemove(key, out value));
environment.DebugStats.PendingBatchCompletions.Decrement();
return value;
}
private static void HandleBatchCompletion(bool success, BatchContextSafeHandle ctx, BatchCompletionDelegate callback)
{
try
{
callback(success, ctx);
}
catch (Exception e)
{
Logger.Error(e, "Exception occured while invoking batch completion delegate.");
}
finally
{
if (ctx != null)
{
ctx.Dispose();
}
}
}
private static void HandleRequestCallCompletion(bool success, RequestCallContextSafeHandle ctx, RequestCallCompletionDelegate callback)
{
try
{
callback(success, ctx);
}
catch (Exception e)
{
Logger.Error(e, "Exception occured while invoking request call completion delegate.");
}
finally
{
if (ctx != null)
{
ctx.Dispose();
}
}
}
/// <summary>
/// IntPtr doesn't implement <c>IEquatable{IntPtr}</c> so we need to use custom comparer to avoid boxing.
/// </summary>
private class IntPtrComparer : IEqualityComparer<IntPtr>
{
public bool Equals(IntPtr x, IntPtr y)
{
return x == y;
}
public int GetHashCode(IntPtr obj)
{
return obj.GetHashCode();
}
}
}
}
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