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Copy pathr_task_group.h
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51 lines (42 loc) · 1.55 KB
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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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 <arrow/util/parallel.h>
#include <arrow/util/task_group.h>
namespace arrow {
namespace r {
class RTasks {
public:
using Task = internal::FnOnce<Status()>;
explicit RTasks(bool use_threads);
// This Finish() method must never be called from a thread pool thread
// as this would deadlock.
//
// Usage is to :
// - create an RTasks instance on the main thread
// - add some tasks with .Append()
// - and then call .Finish() so that the parallel tasks are finished
Status Finish();
void Append(bool parallel, Task&& task);
void Reset();
bool use_threads_;
StopSource stop_source_;
std::shared_ptr<arrow::internal::TaskGroup> parallel_tasks_;
std::vector<Task> delayed_serial_tasks_;
};
} // namespace r
} // namespace arrow