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// Copyright 2020 Google LLC
//
// 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
//
// https://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.
#ifndef PLATFORM_IMPL_WINDOWS_EXECUTOR_H_
#define PLATFORM_IMPL_WINDOWS_EXECUTOR_H_
#include <atomic>
#include "platform/api/executor.h"
#include "platform/impl/windows/thread_pool.h"
namespace location {
namespace nearby {
namespace windows {
enum class ExecutorState {
Ready, // has been created and initialized
NotReady // Executor has not been initialized
};
// This abstract class is the superclass of all classes representing an
// Executor.
class Executor : public api::Executor {
public:
Executor();
Executor(int32_t maxConcurrency);
// Before returning from destructor, executor must wait for all pending
// jobs to finish.
~Executor() override {}
// https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Executor.html#execute-java.lang.Runnable-
void Execute(Runnable&& runnable) override;
// https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorService.html#shutdown--
void Shutdown() override;
private:
bool InitializeThreadPool();
std::unique_ptr<ThreadPool> thread_pool_;
std::atomic<bool> shut_down_;
ExecutorState executor_state_;
int32_t max_concurrency_;
};
} // namespace windows
} // namespace nearby
} // namespace location
#endif // PLATFORM_IMPL_WINDOWS_EXECUTOR_H_