gecko/dom/workers/Workers.h

127 lines
3.7 KiB
C++

/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Web Workers.
*
* The Initial Developer of the Original Code is
* The Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Ben Turner <bent.mozilla@gmail.com> (Original Author)
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef mozilla_dom_workers_workers_h__
#define mozilla_dom_workers_workers_h__
#include "jspubtd.h"
#include "jsapi.h"
#include "nsISupportsImpl.h"
#include "mozilla/Mutex.h"
#define BEGIN_WORKERS_NAMESPACE \
namespace mozilla { namespace dom { namespace workers {
#define END_WORKERS_NAMESPACE \
} /* namespace workers */ } /* namespace dom */ } /* namespace mozilla */
#define USING_WORKERS_NAMESPACE \
using namespace mozilla::dom::workers;
class nsPIDOMWindow;
BEGIN_WORKERS_NAMESPACE
class WorkerPrivate;
struct PrivatizableBase
{ };
#ifdef DEBUG
void
AssertIsOnMainThread();
#else
inline void
AssertIsOnMainThread()
{ }
#endif
// All of these are implemented in RuntimeService.cpp
JSBool
ResolveWorkerClasses(JSContext* aCx, JSObject* aObj, jsid aId, uintN aFlags,
JSObject** aObjp);
void
CancelWorkersForWindow(JSContext* aCx, nsPIDOMWindow* aWindow);
void
SuspendWorkersForWindow(JSContext* aCx, nsPIDOMWindow* aWindow);
void
ResumeWorkersForWindow(JSContext* aCx, nsPIDOMWindow* aWindow);
class WorkerTask {
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(WorkerTask)
virtual ~WorkerTask() { }
virtual bool RunTask(JSContext* aCx) = 0;
};
class WorkerCrossThreadDispatcher {
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(WorkerCrossThreadDispatcher)
WorkerCrossThreadDispatcher(WorkerPrivate* aPrivate) :
mMutex("WorkerCrossThreadDispatcher"), mPrivate(aPrivate) {}
void Forget()
{
mozilla::MutexAutoLock lock(mMutex);
mPrivate = nsnull;
}
/**
* Generically useful function for running a bit of C++ code on the worker
* thread.
*/
bool PostTask(WorkerTask* aTask);
protected:
friend class WorkerPrivate;
// Must be acquired *before* the WorkerPrivate's mutex, when they're both held.
mozilla::Mutex mMutex;
WorkerPrivate* mPrivate;
};
WorkerCrossThreadDispatcher*
GetWorkerCrossThreadDispatcher(JSContext* aCx, jsval aWorker);
END_WORKERS_NAMESPACE
#endif /* mozilla_dom_workers_workers_h__ */