96 lines
3.2 KiB
C++
96 lines
3.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_workers_WorkerHolder_h
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#define mozilla_dom_workers_WorkerHolder_h
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#include "mozilla/dom/workers/Workers.h"
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BEGIN_WORKERS_NAMESPACE
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/**
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* Use this chart to help figure out behavior during each of the closing
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* statuses. Details below.
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*
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* +==============================================================+
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* | Closing Statuses |
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* +=============+=============+=================+================+
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* | status | clear queue | abort execution | close handler |
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* +=============+=============+=================+================+
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* | Closing | yes | no | no timeout |
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* +-------------+-------------+-----------------+----------------+
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* | Terminating | yes | yes | no timeout |
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* +-------------+-------------+-----------------+----------------+
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* | Canceling | yes | yes | short duration |
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* +-------------+-------------+-----------------+----------------+
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* | Killing | yes | yes | doesn't run |
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* +-------------+-------------+-----------------+----------------+
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*/
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#ifdef Status
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/* Xlib headers insist on this for some reason... Nuke it because
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it'll override our member name */
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#undef Status
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#endif
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enum Status
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{
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// Not yet scheduled.
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Pending = 0,
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// This status means that the close handler has not yet been scheduled.
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Running,
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// Inner script called close() on the worker global scope. Setting this
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// status causes the worker to clear its queue of events but does not abort
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// the currently running script. The close handler is also scheduled with
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// no expiration time.
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Closing,
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// Outer script called terminate() on the worker or the worker object was
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// garbage collected in its outer script. Setting this status causes the
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// worker to abort immediately, clear its queue of events, and schedules the
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// close handler with no expiration time.
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Terminating,
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// Either the user navigated away from the owning page or the owning page fell
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// out of bfcache. Setting this status causes the worker to abort immediately
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// and schedules the close handler with a short expiration time. Since the
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// page has gone away the worker may not post any messages.
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Canceling,
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// The application is shutting down. Setting this status causes the worker to
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// abort immediately and the close handler is never scheduled.
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Killing,
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// The close handler has run and the worker is effectively dead.
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Dead
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};
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class WorkerHolder
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{
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public:
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NS_DECL_OWNINGTHREAD
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WorkerHolder();
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virtual ~WorkerHolder();
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bool HoldWorker(WorkerPrivate* aWorkerPrivate, Status aFailStatus);
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void ReleaseWorker();
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virtual bool Notify(Status aStatus) = 0;
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protected:
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void ReleaseWorkerInternal();
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WorkerPrivate* MOZ_NON_OWNING_REF mWorkerPrivate;
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private:
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void AssertIsOwningThread() const;
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};
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END_WORKERS_NAMESPACE
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#endif /* mozilla_dom_workers_WorkerHolder_h */
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