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TaskOperatorSpillContexts.h
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TaskOperatorSpillContexts.h
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// Copyright 2023 PingCAP, Inc.
//
// 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.
#pragma once
#include <Core/OperatorSpillContext.h>
namespace DB
{
class TaskOperatorSpillContexts
{
public:
Int64 triggerAutoSpill(Int64 expected_released_memories);
void registerOperatorSpillContext(const OperatorSpillContextPtr & operator_spill_context);
/// for tests
size_t operatorSpillContextCount()
{
appendAdditionalOperatorSpillContexts();
return operator_spill_contexts.size();
}
/// for tests
size_t additionalOperatorSpillContextCount() const
{
std::unique_lock lock(mutex);
return additional_operator_spill_contexts.size();
}
Int64 totalRevocableMemories();
bool isFinished() const { return is_task_finished; }
void finish() { is_task_finished = true; }
private:
void appendAdditionalOperatorSpillContexts();
/// access to operator_spill_contexts is thread safe
std::list<OperatorSpillContextPtr> operator_spill_contexts;
mutable std::mutex mutex;
/// access to additional_operator_spill_contexts need acquire lock first
std::list<OperatorSpillContextPtr> additional_operator_spill_contexts;
std::atomic<bool> has_additional_operator_spill_contexts{false};
std::atomic<bool> is_task_finished{false};
};
} // namespace DB