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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_mscom_SpinEvent_h
#define mozilla_mscom_SpinEvent_h

#include "mozilla/Atomics.h"
#include "mozilla/Attributes.h"
#include "nsWindowsHelpers.h"

namespace mozilla {
namespace mscom {

class MOZ_NON_TEMPORARY_CLASS SpinEvent final {
 public:
  SpinEvent();
  ~SpinEvent() = default;

  bool Wait(HANDLE aTargetThread);
  void Signal();

  SpinEvent(const SpinEvent&) = delete;
  SpinEvent(SpinEvent&&) = delete;
  SpinEvent& operator=(SpinEvent&&) = delete;
  SpinEvent& operator=(const SpinEvent&) = delete;

 private:
  Atomic<bool, ReleaseAcquire> mDone;
  nsAutoHandle mDoneEvent;
  static bool InitStatics();
  static bool sIsMulticore;
};

}  // namespace mscom
}  // namespace mozilla

#endif  // mozilla_mscom_SpinEvent_h