gecko-dev/dom/workers/Workers.h

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/* -*- 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_workers_h__
#define mozilla_dom_workers_workers_h__
#include "jsapi.h"
#include "mozilla/Attributes.h"
#include "mozilla/Mutex.h"
#include <stdint.h>
#include "nsAutoPtr.h"
#include "nsCOMPtr.h"
#include "nsDebug.h"
#include "nsString.h"
#include "nsTArray.h"
#include "nsILoadContext.h"
#include "nsIWeakReferenceUtils.h"
#include "nsIInterfaceRequestor.h"
#include "mozilla/dom/ChannelInfo.h"
#include "mozilla/net/ReferrerPolicy.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;
#define WORKERS_SHUTDOWN_TOPIC "web-workers-shutdown"
class nsIContentSecurityPolicy;
class nsIScriptContext;
class nsIGlobalObject;
class nsPIDOMWindowInner;
class nsIPrincipal;
class nsILoadGroup;
class nsITabChild;
class nsIChannel;
class nsIRunnable;
class nsIURI;
namespace mozilla {
namespace ipc {
class PrincipalInfo;
} // namespace ipc
namespace dom {
// If you change this, the corresponding list in nsIWorkerDebugger.idl needs to
// be updated too.
enum WorkerType
{
WorkerTypeDedicated,
WorkerTypeShared,
WorkerTypeService
};
} // namespace dom
} // namespace mozilla
BEGIN_WORKERS_NAMESPACE
class WorkerPrivate;
struct PrivatizableBase
{ };
#ifdef DEBUG
void
AssertIsOnMainThread();
#else
inline void
AssertIsOnMainThread()
{ }
#endif
struct JSSettings
{
enum {
// All the GC parameters that we support.
JSSettings_JSGC_MAX_BYTES = 0,
JSSettings_JSGC_MAX_MALLOC_BYTES,
JSSettings_JSGC_HIGH_FREQUENCY_TIME_LIMIT,
JSSettings_JSGC_LOW_FREQUENCY_HEAP_GROWTH,
JSSettings_JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MIN,
JSSettings_JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MAX,
JSSettings_JSGC_HIGH_FREQUENCY_LOW_LIMIT,
JSSettings_JSGC_HIGH_FREQUENCY_HIGH_LIMIT,
JSSettings_JSGC_ALLOCATION_THRESHOLD,
JSSettings_JSGC_SLICE_TIME_BUDGET,
JSSettings_JSGC_DYNAMIC_HEAP_GROWTH,
JSSettings_JSGC_DYNAMIC_MARK_SLICE,
JSSettings_JSGC_REFRESH_FRAME_SLICES,
// JSGC_MODE not supported
// This must be last so that we get an accurate count.
kGCSettingsArraySize
};
struct JSGCSetting
{
JSGCParamKey key;
uint32_t value;
JSGCSetting()
: key(static_cast<JSGCParamKey>(-1)), value(0)
{ }
bool
IsSet() const
{
return key != static_cast<JSGCParamKey>(-1);
}
void
Unset()
{
key = static_cast<JSGCParamKey>(-1);
value = 0;
}
};
// There are several settings that we know we need so it makes sense to
// preallocate here.
typedef JSGCSetting JSGCSettingsArray[kGCSettingsArraySize];
// Settings that change based on chrome/content context.
struct JSContentChromeSettings
{
JS::CompartmentOptions compartmentOptions;
int32_t maxScriptRuntime;
JSContentChromeSettings()
: compartmentOptions(), maxScriptRuntime(0)
{ }
};
JSContentChromeSettings chrome;
JSContentChromeSettings content;
JSGCSettingsArray gcSettings;
JS::ContextOptions contextOptions;
#ifdef JS_GC_ZEAL
uint8_t gcZeal;
uint32_t gcZealFrequency;
#endif
JSSettings()
#ifdef JS_GC_ZEAL
: gcZeal(0), gcZealFrequency(0)
#endif
{
for (uint32_t index = 0; index < ArrayLength(gcSettings); index++) {
new (gcSettings + index) JSGCSetting();
}
}
bool
ApplyGCSetting(JSGCParamKey aKey, uint32_t aValue)
{
JSSettings::JSGCSetting* firstEmptySetting = nullptr;
JSSettings::JSGCSetting* foundSetting = nullptr;
for (uint32_t index = 0; index < ArrayLength(gcSettings); index++) {
JSSettings::JSGCSetting& setting = gcSettings[index];
if (setting.key == aKey) {
foundSetting = &setting;
break;
}
if (!firstEmptySetting && !setting.IsSet()) {
firstEmptySetting = &setting;
}
}
if (aValue) {
if (!foundSetting) {
foundSetting = firstEmptySetting;
if (!foundSetting) {
NS_ERROR("Not enough space for this value!");
return false;
}
}
foundSetting->key = aKey;
foundSetting->value = aValue;
return true;
}
if (foundSetting) {
foundSetting->Unset();
return true;
}
return false;
}
};
enum WorkerPreference
{
#define WORKER_SIMPLE_PREF(name, getter, NAME) WORKERPREF_ ## NAME,
#define WORKER_PREF(name, callback)
#include "mozilla/dom/WorkerPrefs.h"
#undef WORKER_SIMPLE_PREF
#undef WORKER_PREF
WORKERPREF_COUNT
};
// Implemented in WorkerPrivate.cpp
struct WorkerLoadInfo
{
// All of these should be released in WorkerPrivateParent::ForgetMainThreadObjects.
nsCOMPtr<nsIURI> mBaseURI;
nsCOMPtr<nsIURI> mResolvedScriptURI;
nsCOMPtr<nsIPrincipal> mPrincipal;
nsCOMPtr<nsIScriptContext> mScriptContext;
nsCOMPtr<nsPIDOMWindowInner> mWindow;
nsCOMPtr<nsIContentSecurityPolicy> mCSP;
nsCOMPtr<nsIChannel> mChannel;
nsCOMPtr<nsILoadGroup> mLoadGroup;
// mLoadFailedAsyncRunnable will execute on main thread if script loading
// fails during script loading. If script loading is never started due to
// a synchronous error, then the runnable is never executed. The runnable
// is guaranteed to be released on the main thread.
nsCOMPtr<nsIRunnable> mLoadFailedAsyncRunnable;
class InterfaceRequestor final : public nsIInterfaceRequestor
{
NS_DECL_ISUPPORTS
public:
InterfaceRequestor(nsIPrincipal* aPrincipal, nsILoadGroup* aLoadGroup);
void MaybeAddTabChild(nsILoadGroup* aLoadGroup);
NS_IMETHOD GetInterface(const nsIID& aIID, void** aSink) override;
private:
~InterfaceRequestor() { }
already_AddRefed<nsITabChild> GetAnyLiveTabChild();
nsCOMPtr<nsILoadContext> mLoadContext;
nsCOMPtr<nsIInterfaceRequestor> mOuterRequestor;
// Array of weak references to nsITabChild. We do not want to keep TabChild
// actors alive for long after their ActorDestroy() methods are called.
nsTArray<nsWeakPtr> mTabChildList;
};
// Only set if we have a custom overriden load group
RefPtr<InterfaceRequestor> mInterfaceRequestor;
nsAutoPtr<mozilla::ipc::PrincipalInfo> mPrincipalInfo;
nsCString mDomain;
nsString mServiceWorkerCacheName;
ChannelInfo mChannelInfo;
uint64_t mWindowID;
uint64_t mServiceWorkerID;
net::ReferrerPolicy mReferrerPolicy;
bool mFromWindow;
bool mEvalAllowed;
bool mReportCSPViolations;
bool mXHRParamsAllowed;
bool mPrincipalIsSystem;
bool mStorageAllowed;
bool mServiceWorkersTestingInWindow;
PrincipalOriginAttributes mOriginAttributes;
WorkerLoadInfo();
~WorkerLoadInfo();
void StealFrom(WorkerLoadInfo& aOther);
};
// All of these are implemented in RuntimeService.cpp
void
CancelWorkersForWindow(nsPIDOMWindowInner* aWindow);
void
FreezeWorkersForWindow(nsPIDOMWindowInner* aWindow);
void
ThawWorkersForWindow(nsPIDOMWindowInner* aWindow);
void
SuspendWorkersForWindow(nsPIDOMWindowInner* aWindow);
void
ResumeWorkersForWindow(nsPIDOMWindowInner* aWindow);
// A class that can be used with WorkerCrossThreadDispatcher to run a
// bit of C++ code on the worker thread.
class WorkerTask
{
protected:
WorkerTask()
{ }
virtual ~WorkerTask()
{ }
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(WorkerTask)
// The return value here has the same semantics as the return value
// of WorkerRunnable::WorkerRun.
virtual bool
RunTask(JSContext* aCx) = 0;
};
class WorkerCrossThreadDispatcher
{
friend class WorkerPrivate;
// Must be acquired *before* the WorkerPrivate's mutex, when they're both
// held.
Mutex mMutex;
WorkerPrivate* mWorkerPrivate;
private:
// Only created by WorkerPrivate.
explicit WorkerCrossThreadDispatcher(WorkerPrivate* aWorkerPrivate);
// Only called by WorkerPrivate.
void
Forget()
{
MutexAutoLock lock(mMutex);
mWorkerPrivate = nullptr;
}
~WorkerCrossThreadDispatcher() {}
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(WorkerCrossThreadDispatcher)
// Generically useful function for running a bit of C++ code on the worker
// thread.
bool
PostTask(WorkerTask* aTask);
};
WorkerCrossThreadDispatcher*
GetWorkerCrossThreadDispatcher(JSContext* aCx, const JS::Value& aWorker);
// Random unique constant to facilitate JSPrincipal debugging
const uint32_t kJSPrincipalsDebugToken = 0x7e2df9d2;
namespace exceptions {
// Implemented in Exceptions.cpp
void
ThrowDOMExceptionForNSResult(JSContext* aCx, nsresult aNSResult);
} // namespace exceptions
bool
IsWorkerGlobal(JSObject* global);
bool
IsDebuggerGlobal(JSObject* global);
bool
IsDebuggerSandbox(JSObject* object);
// Throws the JSMSG_GETTER_ONLY exception. This shouldn't be used going
// forward -- getter-only properties should just use JS_PSG for the setter
// (implying no setter at all), which will not throw when set in non-strict
// code but will in strict code. Old code should use this only for temporary
// compatibility reasons.
extern bool
GetterOnlyJSNative(JSContext* aCx, unsigned aArgc, JS::Value* aVp);
END_WORKERS_NAMESPACE
#endif // mozilla_dom_workers_workers_h__