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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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
WorkerHolder();
virtual ~WorkerHolder();
bool HoldWorker(WorkerPrivate* aWorkerPrivate, Status aFailStatus);
void ReleaseWorker();
virtual bool Notify(Status aStatus) = 0;
protected:
void ReleaseWorkerInternal();
WorkerPrivate* MOZ_NON_OWNING_REF mWorkerPrivate;
private:
void AssertIsOwningThread() const;
};
END_WORKERS_NAMESPACE
#endif /* mozilla_dom_workers_WorkerHolder_h */
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