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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_SCHEDULED_EXECUTOR_H_
#define PLATFORM_IMPL_WINDOWS_SCHEDULED_EXECUTOR_H_
#include <windows.h>
#include "platform/api/scheduled_executor.h"
#include "platform/impl/windows/executor.h"
namespace location {
namespace nearby {
namespace windows {
#define TIMER_NAME_BUFFER_SIZE 64
// An Executor that can schedule commands to run after a given delay, or to
// execute periodically.
//
// https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ScheduledExecutorService.html
class ScheduledExecutor : public api::ScheduledExecutor {
public:
ScheduledExecutor();
~ScheduledExecutor() override = default;
// Cancelable is kept both in the executor context, and in the caller context.
// We want Cancelable to live until both caller and executor are done with it.
// Exclusive ownership model does not work for this case;
// using std:shared_ptr<> instead if std::unique_ptr<>.
std::shared_ptr<api::Cancelable> Schedule(Runnable&& runnable,
absl::Duration duration) 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:
static void WINAPI _TimerProc(LPVOID lpArgToCompletionRoutine,
DWORD dwTimerLowValue, DWORD dwTimerHighValue);
std::unique_ptr<nearby::windows::Executor> executor_;
std::vector<HANDLE> waitable_timers_;
std::atomic_bool shut_down_;
};
} // namespace windows
} // namespace nearby
} // namespace location
#endif // PLATFORM_IMPL_WINDOWS_SCHEDULED_EXECUTOR_H_