cpp/platform/impl/windows/cancelable.h

// 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_CANCELABLE_H_
#define PLATFORM_IMPL_WINDOWS_CANCELABLE_H_

#include <windows.h>

#include "platform/api/cancelable.h"

namespace location {
namespace nearby {
namespace windows {

// An interface to provide a cancellation mechanism for objects that represent
// long-running operations.
class Cancelable : public api::Cancelable {
 public:
  Cancelable(HANDLE handle) : handle_(handle) {}
  ~Cancelable() override = default;

  bool Cancel() override {
    if (CancelWaitableTimer(handle_)) {
      CloseHandle(handle_);
      return true;
    }

    return false;
  };

 private:
  HANDLE handle_;
};

}  // namespace windows
}  // namespace nearby
}  // namespace location

#endif  // PLATFORM_IMPL_WINDOWS_CANCELABLE_H_