зеркало из https://github.com/mozilla/gecko-dev.git
106 строки
3.4 KiB
C++
106 строки
3.4 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_WorkerHolder_h
|
|
#define mozilla_dom_workers_WorkerHolder_h
|
|
|
|
#include "mozilla/dom/workers/Workers.h"
|
|
|
|
BEGIN_WORKERS_NAMESPACE
|
|
|
|
/**
|
|
* Use this chart to help figure out behavior during each of the closing
|
|
* statuses. Details below.
|
|
*
|
|
* +==============================================================+
|
|
* | Closing Statuses |
|
|
* +=============+=============+=================+================+
|
|
* | status | clear queue | abort execution | close handler |
|
|
* +=============+=============+=================+================+
|
|
* | Closing | yes | no | no timeout |
|
|
* +-------------+-------------+-----------------+----------------+
|
|
* | Terminating | yes | yes | no timeout |
|
|
* +-------------+-------------+-----------------+----------------+
|
|
* | Canceling | yes | yes | short duration |
|
|
* +-------------+-------------+-----------------+----------------+
|
|
* | Killing | yes | yes | doesn't run |
|
|
* +-------------+-------------+-----------------+----------------+
|
|
*/
|
|
|
|
#ifdef Status
|
|
/* Xlib headers insist on this for some reason... Nuke it because
|
|
it'll override our member name */
|
|
#undef Status
|
|
#endif
|
|
enum Status
|
|
{
|
|
// Not yet scheduled.
|
|
Pending = 0,
|
|
|
|
// This status means that the close handler has not yet been scheduled.
|
|
Running,
|
|
|
|
// Inner script called close() on the worker global scope. Setting this
|
|
// status causes the worker to clear its queue of events but does not abort
|
|
// the currently running script. The close handler is also scheduled with
|
|
// no expiration time.
|
|
Closing,
|
|
|
|
// Outer script called terminate() on the worker or the worker object was
|
|
// garbage collected in its outer script. Setting this status causes the
|
|
// worker to abort immediately, clear its queue of events, and schedules the
|
|
// close handler with no expiration time.
|
|
Terminating,
|
|
|
|
// Either the user navigated away from the owning page or the owning page fell
|
|
// out of bfcache. Setting this status causes the worker to abort immediately
|
|
// and schedules the close handler with a short expiration time. Since the
|
|
// page has gone away the worker may not post any messages.
|
|
Canceling,
|
|
|
|
// The application is shutting down. Setting this status causes the worker to
|
|
// abort immediately and the close handler is never scheduled.
|
|
Killing,
|
|
|
|
// The close handler has run and the worker is effectively dead.
|
|
Dead
|
|
};
|
|
|
|
class WorkerHolder
|
|
{
|
|
public:
|
|
NS_DECL_OWNINGTHREAD
|
|
|
|
enum Behavior {
|
|
AllowIdleShutdownStart,
|
|
PreventIdleShutdownStart,
|
|
};
|
|
|
|
explicit WorkerHolder(Behavior aBehavior = PreventIdleShutdownStart);
|
|
virtual ~WorkerHolder();
|
|
|
|
bool HoldWorker(WorkerPrivate* aWorkerPrivate, Status aFailStatus);
|
|
void ReleaseWorker();
|
|
|
|
virtual bool Notify(Status aStatus) = 0;
|
|
|
|
Behavior GetBehavior() const;
|
|
|
|
protected:
|
|
void ReleaseWorkerInternal();
|
|
|
|
WorkerPrivate* MOZ_NON_OWNING_REF mWorkerPrivate;
|
|
|
|
private:
|
|
void AssertIsOwningThread() const;
|
|
|
|
const Behavior mBehavior;
|
|
};
|
|
|
|
END_WORKERS_NAMESPACE
|
|
|
|
#endif /* mozilla_dom_workers_WorkerHolder_h */
|