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WorkerPrivate.h
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WorkerPrivate.h
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/* -*- 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_workerprivate_h__
#define mozilla_dom_workers_workerprivate_h__
#include "Workers.h"
#include "nsIRunnable.h"
#include "nsIThread.h"
#include "nsIThreadInternal.h"
#include "jsapi.h"
#include "mozilla/CondVar.h"
#include "mozilla/Mutex.h"
#include "mozilla/TimeStamp.h"
#include "nsAutoPtr.h"
#include "nsCOMPtr.h"
#include "nsEventQueue.h"
#include "nsStringGlue.h"
#include "nsTArray.h"
#include "nsTPriorityQueue.h"
#include "EventTarget.h"
#include "Queue.h"
#include "WorkerFeature.h"
class JSAutoStructuredCloneBuffer;
class nsIDocument;
class nsIPrincipal;
class nsIMemoryMultiReporter;
class nsIScriptContext;
class nsIURI;
class nsPIDOMWindow;
class nsITimer;
namespace mozilla {
namespace xpconnect {
namespace memory {
struct IterateData;
} // namespace memory
} // namespace xpconnect
} // namespace mozilla
BEGIN_WORKERS_NAMESPACE
class WorkerPrivate;
class WorkerRunnable : public nsIRunnable
{
public:
enum Target { ParentThread, WorkerThread };
enum BusyBehavior { ModifyBusyCount, UnchangedBusyCount };
protected:
WorkerPrivate* mWorkerPrivate;
Target mTarget;
bool mBusyBehavior;
public:
NS_DECL_ISUPPORTS
bool
Dispatch(JSContext* aCx);
static bool
DispatchToMainThread(nsIRunnable*);
protected:
WorkerRunnable(WorkerPrivate* aWorkerPrivate, Target aTarget,
BusyBehavior aBusyBehavior)
#ifdef DEBUG
;
#else
: mWorkerPrivate(aWorkerPrivate), mTarget(aTarget),
mBusyBehavior(aBusyBehavior)
{ }
#endif
virtual ~WorkerRunnable()
{ }
virtual bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate);
virtual void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult);
virtual bool
DispatchInternal();
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) = 0;
virtual void
PostRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate, bool aRunResult);
private:
NS_DECL_NSIRUNNABLE
};
class WorkerSyncRunnable : public WorkerRunnable
{
protected:
PRUint32 mSyncQueueKey;
bool mBypassSyncQueue;
protected:
friend class WorkerPrivate;
WorkerSyncRunnable(WorkerPrivate* aWorkerPrivate, PRUint32 aSyncQueueKey,
bool aBypassSyncQueue = false)
: WorkerRunnable(aWorkerPrivate, WorkerThread, UnchangedBusyCount),
mSyncQueueKey(aSyncQueueKey), mBypassSyncQueue(aBypassSyncQueue)
{ }
virtual ~WorkerSyncRunnable()
{ }
virtual bool
DispatchInternal();
};
class WorkerControlRunnable : public WorkerRunnable
{
protected:
WorkerControlRunnable(WorkerPrivate* aWorkerPrivate, Target aTarget,
BusyBehavior aBusyBehavior)
: WorkerRunnable(aWorkerPrivate, aTarget, aBusyBehavior)
{ }
virtual ~WorkerControlRunnable()
{ }
virtual bool
DispatchInternal();
};
template <class Derived>
class WorkerPrivateParent : public events::EventTarget
{
public:
struct LocationInfo
{
nsCString mHref;
nsCString mProtocol;
nsCString mHost;
nsCString mHostname;
nsCString mPort;
nsCString mPathname;
nsCString mSearch;
nsCString mHash;
};
protected:
mozilla::Mutex mMutex;
mozilla::CondVar mCondVar;
private:
JSObject* mJSObject;
WorkerPrivate* mParent;
JSContext* mParentJSContext;
nsString mScriptURL;
nsCString mDomain;
LocationInfo mLocationInfo;
// Main-thread things.
nsCOMPtr<nsPIDOMWindow> mWindow;
nsCOMPtr<nsIScriptContext> mScriptContext;
nsCOMPtr<nsIURI> mBaseURI;
nsCOMPtr<nsIURI> mScriptURI;
nsCOMPtr<nsIPrincipal> mPrincipal;
nsCOMPtr<nsIDocument> mDocument;
// Only used for top level workers.
nsTArray<nsRefPtr<WorkerRunnable> > mQueuedRunnables;
PRUint64 mBusyCount;
Status mParentStatus;
PRUint32 mJSContextOptions;
PRUint8 mGCZeal;
bool mJSObjectRooted;
bool mParentSuspended;
bool mIsChromeWorker;
bool mPrincipalIsSystem;
protected:
WorkerPrivateParent(JSContext* aCx, JSObject* aObject, WorkerPrivate* aParent,
JSContext* aParentJSContext, const nsAString& aScriptURL,
bool aIsChromeWorker, const nsACString& aDomain,
nsCOMPtr<nsPIDOMWindow>& aWindow,
nsCOMPtr<nsIScriptContext>& aScriptContext,
nsCOMPtr<nsIURI>& aBaseURI,
nsCOMPtr<nsIPrincipal>& aPrincipal,
nsCOMPtr<nsIDocument>& aDocument);
~WorkerPrivateParent();
private:
Derived*
ParentAsWorkerPrivate() const
{
return static_cast<Derived*>(const_cast<WorkerPrivateParent*>(this));
}
public:
// May be called on any thread...
bool
Start();
// Called on the parent thread.
bool
Notify(JSContext* aCx, Status aStatus);
bool
Cancel(JSContext* aCx)
{
return Notify(aCx, Canceling);
}
bool
Kill(JSContext* aCx)
{
return Notify(aCx, Killing);
}
bool
Suspend(JSContext* aCx);
bool
Resume(JSContext* aCx);
void
TraceInstance(JSTracer* aTrc)
{
AssertIsOnParentThread();
events::EventTarget::TraceInstance(aTrc);
}
void
FinalizeInstance(JSContext* aCx, bool aFromJSFinalizer);
bool
Terminate(JSContext* aCx)
{
return Notify(aCx, Terminating);
}
bool
Close(JSContext* aCx);
bool
ModifyBusyCount(JSContext* aCx, bool aIncrease);
bool
RootJSObject(JSContext* aCx, bool aRoot);
void
ForgetMainThreadObjects(nsTArray<nsCOMPtr<nsISupports> >& aDoomed);
bool
PostMessage(JSContext* aCx, jsval aMessage);
PRUint64
GetOuterWindowId();
void
UpdateJSContextOptions(JSContext* aCx, PRUint32 aOptions);
#ifdef JS_GC_ZEAL
void
UpdateGCZeal(JSContext* aCx, PRUint8 aGCZeal);
#endif
using events::EventTarget::GetEventListenerOnEventTarget;
using events::EventTarget::SetEventListenerOnEventTarget;
void
QueueRunnable(WorkerRunnable* aRunnable)
{
AssertIsOnMainThread();
mQueuedRunnables.AppendElement(aRunnable);
}
WorkerPrivate*
GetParent() const
{
return mParent;
}
bool
IsSuspended() const
{
AssertIsOnParentThread();
return mParentSuspended;
}
Status
ParentStatus() const
{
mMutex.AssertCurrentThreadOwns();
return mParentStatus;
}
JSContext*
ParentJSContext() const;
nsIScriptContext*
GetScriptContext() const
{
AssertIsOnMainThread();
return mScriptContext;
}
JSObject*
GetJSObject() const
{
return mJSObject;
}
const nsString&
ScriptURL() const
{
return mScriptURL;
}
const nsCString&
Domain() const
{
return mDomain;
}
nsIURI*
GetBaseURI() const
{
AssertIsOnMainThread();
return mBaseURI;
}
nsresult
SetBaseURI(nsIURI* aBaseURI);
nsIURI*
GetScriptURI() const
{
AssertIsOnMainThread();
return mScriptURI;
}
void
SetScriptURI(nsIURI* aScriptURI)
{
AssertIsOnMainThread();
mScriptURI = aScriptURI;
}
nsIPrincipal*
GetPrincipal() const
{
AssertIsOnMainThread();
return mPrincipal;
}
void
SetPrincipal(nsIPrincipal* aPrincipal);
bool
UsesSystemPrincipal() const
{
return mPrincipalIsSystem;
}
nsIDocument*
GetDocument() const
{
AssertIsOnMainThread();
return mDocument;
}
void
SetDocument(nsIDocument* aDocument)
{
AssertIsOnMainThread();
mDocument = aDocument;
}
nsPIDOMWindow*
GetWindow()
{
AssertIsOnMainThread();
return mWindow;
}
LocationInfo&
GetLocationInfo()
{
return mLocationInfo;
}
PRUint32
GetJSContextOptions() const
{
return mJSContextOptions;
}
#ifdef JS_GC_ZEAL
PRUint8
GetGCZeal() const
{
return mGCZeal;
}
#endif
bool
IsChromeWorker() const
{
return mIsChromeWorker;
}
#ifdef DEBUG
void
AssertIsOnParentThread() const;
void
AssertInnerWindowIsCorrect() const;
#else
void
AssertIsOnParentThread() const
{ }
void
AssertInnerWindowIsCorrect() const
{ }
#endif
};
class WorkerPrivate : public WorkerPrivateParent<WorkerPrivate>
{
friend class WorkerPrivateParent<WorkerPrivate>;
typedef WorkerPrivateParent<WorkerPrivate> ParentType;
struct TimeoutInfo;
typedef Queue<nsIRunnable*, 50> EventQueue;
EventQueue mQueue;
EventQueue mControlQueue;
struct SyncQueue
{
Queue<nsIRunnable*, 10> mQueue;
bool mComplete;
bool mResult;
SyncQueue()
: mComplete(false), mResult(false)
{ }
~SyncQueue()
{
nsIRunnable* event;
while (mQueue.Pop(event)) {
event->Release();
}
}
};
nsTArray<nsAutoPtr<SyncQueue> > mSyncQueues;
// Touched on multiple threads, protected with mMutex.
JSContext* mJSContext;
// Things touched on worker thread only.
nsTArray<ParentType*> mChildWorkers;
nsTArray<WorkerFeature*> mFeatures;
nsTArray<nsAutoPtr<TimeoutInfo> > mTimeouts;
nsCOMPtr<nsITimer> mTimer;
nsCOMPtr<nsIMemoryMultiReporter> mMemoryReporter;
mozilla::TimeStamp mKillTime;
PRUint32 mErrorHandlerRecursionCount;
PRUint32 mNextTimeoutId;
Status mStatus;
bool mSuspended;
bool mTimerRunning;
bool mRunningExpiredTimeouts;
bool mCloseHandlerStarted;
bool mCloseHandlerFinished;
bool mMemoryReporterRunning;
bool mMemoryReporterDisabled;
#ifdef DEBUG
nsCOMPtr<nsIThread> mThread;
#endif
public:
~WorkerPrivate();
static WorkerPrivate*
Create(JSContext* aCx, JSObject* aObj, WorkerPrivate* aParent,
JSString* aScriptURL, bool aIsChromeWorker);
void
DoRunLoop(JSContext* aCx);
bool
OperationCallback(JSContext* aCx);
bool
Dispatch(WorkerRunnable* aEvent)
{
return Dispatch(aEvent, &mQueue);
}
bool
Dispatch(WorkerSyncRunnable* aEvent)
{
if (aEvent->mBypassSyncQueue) {
return Dispatch(aEvent, &mQueue);
}
return DispatchToSyncQueue(aEvent);
}
bool
Dispatch(WorkerControlRunnable* aEvent)
{
return Dispatch(aEvent, &mControlQueue);
}
bool
CloseInternal(JSContext* aCx)
{
AssertIsOnWorkerThread();
return NotifyInternal(aCx, Closing);
}
bool
SuspendInternal(JSContext* aCx);
bool
ResumeInternal(JSContext* aCx);
void
TraceInternal(JSTracer* aTrc);
bool
ModifyBusyCountFromWorker(JSContext* aCx, bool aIncrease);
bool
AddChildWorker(JSContext* aCx, ParentType* aChildWorker);
void
RemoveChildWorker(JSContext* aCx, ParentType* aChildWorker);
bool
AddFeature(JSContext* aCx, WorkerFeature* aFeature);
void
RemoveFeature(JSContext* aCx, WorkerFeature* aFeature);
void
NotifyFeatures(JSContext* aCx, Status aStatus);
bool
HasActiveFeatures()
{
return !(mChildWorkers.IsEmpty() && mTimeouts.IsEmpty() &&
mFeatures.IsEmpty());
}
PRUint32
CreateNewSyncLoop();
bool
RunSyncLoop(JSContext* aCx, PRUint32 aSyncLoopKey);
void
StopSyncLoop(PRUint32 aSyncLoopKey, bool aSyncResult);
bool
PostMessageToParent(JSContext* aCx, jsval aMessage);
bool
NotifyInternal(JSContext* aCx, Status aStatus);
void
ReportError(JSContext* aCx, const char* aMessage, JSErrorReport* aReport);
bool
SetTimeout(JSContext* aCx, uintN aArgc, jsval* aVp, bool aIsInterval);
bool
ClearTimeout(JSContext* aCx, uint32 aId);
bool
RunExpiredTimeouts(JSContext* aCx);
bool
RescheduleTimeoutTimer(JSContext* aCx);
void
CloseHandlerStarted()
{
AssertIsOnWorkerThread();
mCloseHandlerStarted = true;
}
void
CloseHandlerFinished()
{
AssertIsOnWorkerThread();
mCloseHandlerFinished = true;
}
void
UpdateJSContextOptionsInternal(JSContext* aCx, PRUint32 aOptions);
void
ScheduleDeletion(bool aWasPending);
bool
BlockAndCollectRuntimeStats(mozilla::xpconnect::memory::IterateData* aData,
bool* aDisabled);
bool
DisableMemoryReporter();
#ifdef JS_GC_ZEAL
void
UpdateGCZealInternal(JSContext* aCx, PRUint8 aGCZeal);
#endif
JSContext*
GetJSContext() const
{
AssertIsOnWorkerThread();
return mJSContext;
}
#ifdef DEBUG
void
AssertIsOnWorkerThread() const;
void
SetThread(nsIThread* aThread)
{
mThread = aThread;
}
#else
void
AssertIsOnWorkerThread() const
{ }
#endif
private:
WorkerPrivate(JSContext* aCx, JSObject* aObject, WorkerPrivate* aParent,
JSContext* aParentJSContext, const nsAString& aScriptURL,
bool aIsChromeWorker, const nsACString& aDomain,
nsCOMPtr<nsPIDOMWindow>& aWindow,
nsCOMPtr<nsIScriptContext>& aScriptContext,
nsCOMPtr<nsIURI>& aBaseURI, nsCOMPtr<nsIPrincipal>& aPrincipal,
nsCOMPtr<nsIDocument>& aDocument);
bool
Dispatch(WorkerRunnable* aEvent, EventQueue* aQueue);
bool
DispatchToSyncQueue(WorkerSyncRunnable* aEvent);
void
ClearQueue(EventQueue* aQueue);
bool
MayContinueRunning()
{
AssertIsOnWorkerThread();
Status status;
{
mozilla::MutexAutoLock lock(mMutex);
status = mStatus;
}
if (status >= Killing) {
return false;
}
if (status >= Running) {
return mKillTime.IsNull() || RemainingRunTimeMS() > 0;
}
return true;
}
PRUint32
RemainingRunTimeMS() const;
void
CancelAllTimeouts(JSContext* aCx);
bool
ScheduleKillCloseEventRunnable(JSContext* aCx);
void
StopAcceptingEvents()
{
AssertIsOnWorkerThread();
mozilla::MutexAutoLock lock(mMutex);
mStatus = Dead;
mJSContext = nsnull;
ClearQueue(&mQueue);
ClearQueue(&mControlQueue);
}
bool
ProcessAllControlRunnables();
};
WorkerPrivate*
GetWorkerPrivateFromContext(JSContext* aCx);
enum WorkerStructuredDataType
{
DOMWORKER_SCTAG_FILE = JS_SCTAG_USER_MIN + 0x1000,
DOMWORKER_SCTAG_BLOB,
DOMWORKER_SCTAG_END
};
JSStructuredCloneCallbacks*
WorkerStructuredCloneCallbacks(bool aMainRuntime);
JSStructuredCloneCallbacks*
ChromeWorkerStructuredCloneCallbacks(bool aMainRuntime);
END_WORKERS_NAMESPACE
#endif /* mozilla_dom_workers_workerprivate_h__ */