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#region Copyright notice and license
// Copyright 2015 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 System;
using System.Threading;
namespace Grpc.Core.Internal
{
internal class AtomicCounter
{
long counter = 0;
public AtomicCounter(long initialCount = 0)
{
this.counter = initialCount;
}
public long Increment()
{
return Interlocked.Increment(ref counter);
}
public void IncrementIfNonzero(ref bool success)
{
long origValue = counter;
while (true)
{
if (origValue == 0)
{
success = false;
return;
}
long result = Interlocked.CompareExchange(ref counter, origValue + 1, origValue);
if (result == origValue)
{
success = true;
return;
};
origValue = result;
}
}
public long Decrement()
{
return Interlocked.Decrement(ref counter);
}
public long Count
{
get
{
return counter;
}
}
}
}
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