зеркало из https://github.com/mozilla/gecko-dev.git
75 строки
2.3 KiB
C++
75 строки
2.3 KiB
C++
/* -*- 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_dom_workers_WorkerHolderToken_h
|
|
#define mozilla_dom_workers_WorkerHolderToken_h
|
|
|
|
#include "nsISupportsImpl.h"
|
|
#include "nsTObserverArray.h"
|
|
#include "WorkerHolder.h"
|
|
|
|
namespace mozilla {
|
|
namespace dom {
|
|
|
|
class WorkerPrivate;
|
|
|
|
// This is a ref-counted WorkerHolder implementation. If you wish
|
|
// to be notified of worker shutdown beginning, then you can implement
|
|
// the Listener interface and call AddListener().
|
|
//
|
|
// This is purely a convenience class to avoid requiring code to
|
|
// extend WorkerHolder all the time.
|
|
class WorkerHolderToken final : public WorkerHolder {
|
|
public:
|
|
// Pure virtual class defining the interface for objects that
|
|
// wish to be notified of worker shutdown.
|
|
class Listener {
|
|
public:
|
|
virtual void WorkerShuttingDown() = 0;
|
|
};
|
|
|
|
// Attempt to create a WorkerHolderToken(). If the shutdown has already
|
|
// passed the given shutdown phase or fails for another reason then
|
|
// nullptr is returned.
|
|
static already_AddRefed<WorkerHolderToken> Create(
|
|
WorkerPrivate* aWorkerPrivate, WorkerStatus aShutdownStatus,
|
|
Behavior aBehavior = PreventIdleShutdownStart);
|
|
|
|
// Add a listener to the token. Note, this does not hold a strong
|
|
// reference to the listener. You must call RemoveListener() before
|
|
// the listener is destroyed. This can only be called on the owning
|
|
// worker thread.
|
|
void AddListener(Listener* aListener);
|
|
|
|
// Remove a previously added listener. This can only be called on the
|
|
// owning worker thread.
|
|
void RemoveListener(Listener* aListener);
|
|
|
|
bool IsShuttingDown() const;
|
|
|
|
WorkerPrivate* GetWorkerPrivate() const;
|
|
|
|
private:
|
|
WorkerHolderToken(WorkerStatus aShutdownStatus, Behavior aBehavior);
|
|
|
|
~WorkerHolderToken();
|
|
|
|
// WorkerHolder methods
|
|
virtual bool Notify(WorkerStatus aStatus) override;
|
|
|
|
nsTObserverArray<Listener*> mListenerList;
|
|
const WorkerStatus mShutdownStatus;
|
|
bool mShuttingDown;
|
|
|
|
public:
|
|
NS_INLINE_DECL_REFCOUNTING(WorkerHolderToken)
|
|
};
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_dom_workers_WorkerHolderToken_h
|