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Reduce lock

pull/498/head
hadashiA 2023-09-10 23:33:29 +09:00
parent ea57847c97
commit 3bac16229f
1 changed files with 20 additions and 29 deletions
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49
src/UniTask/Assets/Plugins/UniTask/Runtime/Linq/Merge.cs
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@ -65,7 +65,7 @@ namespace Cysharp.Threading.Tasks.Linq
readonly int length; readonly int length;
readonly IUniTaskAsyncEnumerator<T>[] enumerators; readonly IUniTaskAsyncEnumerator<T>[] enumerators;
readonly MergeSourceState[] states; readonly int[] states;
readonly Queue<(T, Exception)> queuedResult = new Queue<(T, Exception)>(); readonly Queue<(T, Exception)> queuedResult = new Queue<(T, Exception)>();
readonly CancellationToken cancellationToken; readonly CancellationToken cancellationToken;
@ -75,12 +75,12 @@ namespace Cysharp.Threading.Tasks.Linq
{ {
this.cancellationToken = cancellationToken; this.cancellationToken = cancellationToken;
length = sources.Length; length = sources.Length;
states = ArrayPool<MergeSourceState>.Shared.Rent(length); states = ArrayPool<int>.Shared.Rent(length);
enumerators = ArrayPool<IUniTaskAsyncEnumerator<T>>.Shared.Rent(length); enumerators = ArrayPool<IUniTaskAsyncEnumerator<T>>.Shared.Rent(length);
for (var i = 0; i < length; i++) for (var i = 0; i < length; i++)
{ {
enumerators[i] = sources[i].GetAsyncEnumerator(cancellationToken); enumerators[i] = sources[i].GetAsyncEnumerator(cancellationToken);
states[i] = MergeSourceState.Pending; states[i] = (int)MergeSourceState.Pending;;
} }
} }
@ -112,23 +112,17 @@ namespace Cysharp.Threading.Tasks.Linq
for (var i = 0; i < length; i++) for (var i = 0; i < length; i++)
{ {
lock (states) if (Interlocked.CompareExchange(ref states[i], (int)MergeSourceState.Running, (int)MergeSourceState.Pending) == (int)MergeSourceState.Pending)
{ {
if (states[i] != MergeSourceState.Pending) var awaiter = enumerators[i].MoveNextAsync().GetAwaiter();
if (awaiter.IsCompleted)
{ {
continue; GetResultAt(i, awaiter);
}
else
{
awaiter.SourceOnCompleted(GetResultAtAction, StateTuple.Create(this, i, awaiter));
} }
states[i] = MergeSourceState.Running;
}
var awaiter = enumerators[i].MoveNextAsync().GetAwaiter();
if (awaiter.IsCompleted)
{
GetResultAt(i, awaiter);
}
else
{
awaiter.SourceOnCompleted(GetResultAtAction, StateTuple.Create(this, i, awaiter));
} }
} }
return new UniTask<bool>(this, completionSource.Version); return new UniTask<bool>(this, completionSource.Version);
@ -141,7 +135,7 @@ namespace Cysharp.Threading.Tasks.Linq
await enumerators[i].DisposeAsync(); await enumerators[i].DisposeAsync();
} }
ArrayPool<MergeSourceState>.Shared.Return(states, true); ArrayPool<int>.Shared.Return(states, true);
ArrayPool<IUniTaskAsyncEnumerator<T>>.Shared.Return(enumerators, true); ArrayPool<IUniTaskAsyncEnumerator<T>>.Shared.Return(enumerators, true);
} }
@ -159,10 +153,7 @@ namespace Cysharp.Threading.Tasks.Linq
try try
{ {
hasNext = awaiter.GetResult(); hasNext = awaiter.GetResult();
lock (states) Interlocked.Exchange(ref states[index], (int)(hasNext ? MergeSourceState.Pending : MergeSourceState.Completed));
{
states[index] = hasNext ? MergeSourceState.Pending : MergeSourceState.Completed;
}
} }
catch (Exception ex) catch (Exception ex)
{ {
@ -196,16 +187,16 @@ namespace Cysharp.Threading.Tasks.Linq
bool IsCompletedAll() bool IsCompletedAll()
{ {
lock (states) for (var i = 0; i < length; i++)
{ {
for (var i = 0; i < length; i++) if (states[i] != (int)MergeSourceState.Completed)
{ {
if (states[i] != MergeSourceState.Completed) return false;
{
return false;
}
} }
return true; }
lock (queuedResult)
{
return queuedResult.Count <= 0;
} }
} }
} }