52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
|
|
// Copyright (C) 2019 The Android Open Source Project
|
|
// Copyright (C) 2019 Google 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 <functional>
|
|
#include <memory>
|
|
#include <vector>
|
|
|
|
namespace android {
|
|
namespace base {
|
|
namespace guest {
|
|
|
|
// WorkPool provides a way to queue several different + arbitrary wait / signal
|
|
// operations. There is no specific imposed order to the operations; all
|
|
// ordering is derived from dependencies among the queued tasks. The number of
|
|
// threads used is the number of concurrent tasks in flight. Tasks are sent in
|
|
// groups, representing a collection that can be waited on (a wait group).
|
|
class WorkPool {
|
|
public:
|
|
using Task = std::function<void()>;
|
|
using WaitGroupHandle = uint64_t;
|
|
using TimeoutUs = uint64_t;
|
|
|
|
WorkPool(int numInitialThreads = 4);
|
|
~WorkPool();
|
|
|
|
WaitGroupHandle schedule(const std::vector<Task>& tasks);
|
|
|
|
bool waitAny(WaitGroupHandle waitGroup, TimeoutUs timeout = -1);
|
|
bool waitAll(WaitGroupHandle waitGroup, TimeoutUs timeout = -1);
|
|
private:
|
|
class Impl;
|
|
std::unique_ptr<Impl> mImpl;
|
|
};
|
|
|
|
} // namespace android
|
|
} // namespace base
|
|
} // namespace guest
|