gecko-dev/dom/script/ScriptLoadRequest.cpp

194 строки
4.8 KiB
C++

/* -*- 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/. */
#include "ModuleLoadRequest.h"
#include "mozilla/HoldDropJSObjects.h"
#include "nsICacheInfoChannel.h"
#include "ScriptLoadRequest.h"
#include "ScriptSettings.h"
namespace mozilla {
namespace dom {
//////////////////////////////////////////////////////////////
// ScriptLoadRequest
//////////////////////////////////////////////////////////////
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ScriptLoadRequest)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(ScriptLoadRequest)
NS_IMPL_CYCLE_COLLECTING_RELEASE(ScriptLoadRequest)
NS_IMPL_CYCLE_COLLECTION_CLASS(ScriptLoadRequest)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(ScriptLoadRequest)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mCacheInfo)
tmp->DropBytecodeCacheReferences();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(ScriptLoadRequest)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mCacheInfo)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(ScriptLoadRequest)
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mScript)
NS_IMPL_CYCLE_COLLECTION_TRACE_END
ScriptLoadRequest::ScriptLoadRequest(ScriptKind aKind,
nsIScriptElement* aElement,
uint32_t aVersion,
mozilla::CORSMode aCORSMode,
const mozilla::dom::SRIMetadata& aIntegrity)
: mKind(aKind)
, mElement(aElement)
, mScriptFromHead(false)
, mProgress(Progress::Loading)
, mDataType(DataType::Unknown)
, mIsInline(true)
, mHasSourceMapURL(false)
, mIsDefer(false)
, mIsAsync(false)
, mIsNonAsyncScriptInserted(false)
, mIsXSLT(false)
, mIsCanceled(false)
, mWasCompiledOMT(false)
, mIsTracking(false)
, mOffThreadToken(nullptr)
, mScriptText()
, mScriptBytecode()
, mBytecodeOffset(0)
, mJSVersion(aVersion)
, mLineNo(1)
, mCORSMode(aCORSMode)
, mIntegrity(aIntegrity)
, mReferrerPolicy(mozilla::net::RP_Unset)
{
}
ScriptLoadRequest::~ScriptLoadRequest()
{
// We should always clean up any off-thread script parsing resources.
MOZ_ASSERT(!mOffThreadToken);
// But play it safe in release builds and try to clean them up here
// as a fail safe.
MaybeCancelOffThreadScript();
if (mScript) {
DropBytecodeCacheReferences();
}
}
void
ScriptLoadRequest::SetReady()
{
MOZ_ASSERT(mProgress != Progress::Ready);
mProgress = Progress::Ready;
}
void
ScriptLoadRequest::Cancel()
{
MaybeCancelOffThreadScript();
mIsCanceled = true;
}
void
ScriptLoadRequest::MaybeCancelOffThreadScript()
{
MOZ_ASSERT(NS_IsMainThread());
if (!mOffThreadToken) {
return;
}
JSContext* cx = danger::GetJSContext();
// Follow the same conditions as ScriptLoader::AttemptAsyncScriptCompile
if (IsModuleRequest()) {
JS::CancelOffThreadModule(cx, mOffThreadToken);
} else if (IsSource()) {
JS::CancelOffThreadScript(cx, mOffThreadToken);
} else {
MOZ_ASSERT(IsBytecode());
JS::CancelOffThreadScriptDecoder(cx, mOffThreadToken);
}
mOffThreadToken = nullptr;
}
void
ScriptLoadRequest::DropBytecodeCacheReferences()
{
mCacheInfo = nullptr;
mScript = nullptr;
DropJSObjects(this);
}
inline ModuleLoadRequest*
ScriptLoadRequest::AsModuleRequest()
{
MOZ_ASSERT(IsModuleRequest());
return static_cast<ModuleLoadRequest*>(this);
}
//////////////////////////////////////////////////////////////
// ScriptLoadRequestList
//////////////////////////////////////////////////////////////
ScriptLoadRequestList::~ScriptLoadRequestList()
{
Clear();
}
void
ScriptLoadRequestList::Clear()
{
while (!isEmpty()) {
RefPtr<ScriptLoadRequest> first = StealFirst();
first->Cancel();
// And just let it go out of scope and die.
}
}
#ifdef DEBUG
bool
ScriptLoadRequestList::Contains(ScriptLoadRequest* aElem) const
{
for (const ScriptLoadRequest* req = getFirst();
req; req = req->getNext()) {
if (req == aElem) {
return true;
}
}
return false;
}
#endif // DEBUG
inline void
ImplCycleCollectionUnlink(ScriptLoadRequestList& aField)
{
while (!aField.isEmpty()) {
RefPtr<ScriptLoadRequest> first = aField.StealFirst();
}
}
inline void
ImplCycleCollectionTraverse(nsCycleCollectionTraversalCallback& aCallback,
ScriptLoadRequestList& aField,
const char* aName,
uint32_t aFlags)
{
for (ScriptLoadRequest* request = aField.getFirst();
request; request = request->getNext())
{
CycleCollectionNoteChild(aCallback, request, aName, aFlags);
}
}
} // dom namespace
} // mozilla namespace