diff options
Diffstat (limited to 'js/xpconnect/src/XPCInlines.h')
| -rw-r--r-- | js/xpconnect/src/XPCInlines.h | 368 |
1 files changed, 368 insertions, 0 deletions
diff --git a/js/xpconnect/src/XPCInlines.h b/js/xpconnect/src/XPCInlines.h new file mode 100644 index 0000000000..e345387465 --- /dev/null +++ b/js/xpconnect/src/XPCInlines.h @@ -0,0 +1,368 @@ +/* -*- 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/. */ + +/* private inline methods (#include'd by xpcprivate.h). */ + +#ifndef xpcinlines_h___ +#define xpcinlines_h___ + +#include <algorithm> + +/***************************************************************************/ + +inline void XPCJSRuntime::AddVariantRoot(XPCTraceableVariant* variant) { + variant->AddToRootSet(&mVariantRoots); +} + +inline void XPCJSRuntime::AddWrappedJSRoot(nsXPCWrappedJS* wrappedJS) { + wrappedJS->AddToRootSet(&mWrappedJSRoots); +} + +/***************************************************************************/ + +inline bool XPCCallContext::IsValid() const { return mState != INIT_FAILED; } + +inline XPCJSContext* XPCCallContext::GetContext() const { + CHECK_STATE(HAVE_CONTEXT); + return mXPCJSContext; +} + +inline JSContext* XPCCallContext::GetJSContext() const { + CHECK_STATE(HAVE_CONTEXT); + return mJSContext; +} + +inline XPCCallContext* XPCCallContext::GetPrevCallContext() const { + CHECK_STATE(HAVE_CONTEXT); + return mPrevCallContext; +} + +inline XPCWrappedNative* XPCCallContext::GetWrapper() const { + if (mState == INIT_FAILED) { + return nullptr; + } + + CHECK_STATE(HAVE_OBJECT); + return mWrapper; +} + +inline bool XPCCallContext::CanGetTearOff() const { + return mState >= HAVE_OBJECT; +} + +inline XPCWrappedNativeTearOff* XPCCallContext::GetTearOff() const { + CHECK_STATE(HAVE_OBJECT); + return mTearOff; +} + +inline nsIXPCScriptable* XPCCallContext::GetScriptable() const { + CHECK_STATE(HAVE_OBJECT); + return mScriptable; +} + +inline XPCNativeSet* XPCCallContext::GetSet() const { + CHECK_STATE(HAVE_NAME); + return mSet; +} + +inline XPCNativeInterface* XPCCallContext::GetInterface() const { + CHECK_STATE(HAVE_NAME); + return mInterface; +} + +inline XPCNativeMember* XPCCallContext::GetMember() const { + CHECK_STATE(HAVE_NAME); + return mMember; +} + +inline bool XPCCallContext::HasInterfaceAndMember() const { + return mState >= HAVE_NAME && mInterface && mMember; +} + +inline bool XPCCallContext::GetStaticMemberIsLocal() const { + CHECK_STATE(HAVE_NAME); + return mStaticMemberIsLocal; +} + +inline unsigned XPCCallContext::GetArgc() const { + CHECK_STATE(READY_TO_CALL); + return mArgc; +} + +inline JS::Value* XPCCallContext::GetArgv() const { + CHECK_STATE(READY_TO_CALL); + return mArgv; +} + +inline void XPCCallContext::SetRetVal(const JS::Value& val) { + CHECK_STATE(HAVE_ARGS); + if (mRetVal) { + *mRetVal = val; + } +} + +inline jsid XPCCallContext::GetResolveName() const { + CHECK_STATE(HAVE_CONTEXT); + return GetContext()->GetResolveName(); +} + +inline jsid XPCCallContext::SetResolveName(JS::HandleId name) { + CHECK_STATE(HAVE_CONTEXT); + return GetContext()->SetResolveName(name); +} + +inline XPCWrappedNative* XPCCallContext::GetResolvingWrapper() const { + CHECK_STATE(HAVE_OBJECT); + return GetContext()->GetResolvingWrapper(); +} + +inline XPCWrappedNative* XPCCallContext::SetResolvingWrapper( + XPCWrappedNative* w) { + CHECK_STATE(HAVE_OBJECT); + return GetContext()->SetResolvingWrapper(w); +} + +inline uint16_t XPCCallContext::GetMethodIndex() const { + CHECK_STATE(HAVE_OBJECT); + return mMethodIndex; +} + +/***************************************************************************/ +inline XPCNativeInterface* XPCNativeMember::GetInterface() const { + XPCNativeMember* arrayStart = + const_cast<XPCNativeMember*>(this - mIndexInInterface); + size_t arrayStartOffset = XPCNativeInterface::OffsetOfMembers(); + char* xpcNativeInterfaceStart = + reinterpret_cast<char*>(arrayStart) - arrayStartOffset; + return reinterpret_cast<XPCNativeInterface*>(xpcNativeInterfaceStart); +} + +/***************************************************************************/ + +inline const nsIID* XPCNativeInterface::GetIID() const { return &mInfo->IID(); } + +inline const char* XPCNativeInterface::GetNameString() const { + return mInfo->Name(); +} + +inline XPCNativeMember* XPCNativeInterface::FindMember(jsid name) const { + const XPCNativeMember* member = mMembers; + for (int i = (int)mMemberCount; i > 0; i--, member++) { + if (member->GetName() == name) { + return const_cast<XPCNativeMember*>(member); + } + } + return nullptr; +} + +/* static */ +inline size_t XPCNativeInterface::OffsetOfMembers() { + return offsetof(XPCNativeInterface, mMembers); +} + +/***************************************************************************/ + +inline XPCNativeSetKey::XPCNativeSetKey(XPCNativeSet* baseSet, + XPCNativeInterface* addition) + : mCx(nullptr), mBaseSet(baseSet), mAddition(addition) { + MOZ_ASSERT(mBaseSet); + MOZ_ASSERT(mAddition); + MOZ_ASSERT(!mBaseSet->HasInterface(mAddition)); +} + +/***************************************************************************/ + +inline bool XPCNativeSet::FindMember(jsid name, XPCNativeMember** pMember, + uint16_t* pInterfaceIndex) const { + XPCNativeInterface* const* iface; + int count = (int)mInterfaceCount; + int i; + + // look for interface names first + + for (i = 0, iface = mInterfaces; i < count; i++, iface++) { + if (name == (*iface)->GetName()) { + if (pMember) { + *pMember = nullptr; + } + if (pInterfaceIndex) { + *pInterfaceIndex = (uint16_t)i; + } + return true; + } + } + + // look for method names + for (i = 0, iface = mInterfaces; i < count; i++, iface++) { + XPCNativeMember* member = (*iface)->FindMember(name); + if (member) { + if (pMember) { + *pMember = member; + } + if (pInterfaceIndex) { + *pInterfaceIndex = (uint16_t)i; + } + return true; + } + } + return false; +} + +inline bool XPCNativeSet::FindMember( + jsid name, XPCNativeMember** pMember, + RefPtr<XPCNativeInterface>* pInterface) const { + uint16_t index; + if (!FindMember(name, pMember, &index)) { + return false; + } + *pInterface = mInterfaces[index]; + return true; +} + +inline bool XPCNativeSet::FindMember(JS::HandleId name, + XPCNativeMember** pMember, + RefPtr<XPCNativeInterface>* pInterface, + XPCNativeSet* protoSet, + bool* pIsLocal) const { + XPCNativeMember* Member; + RefPtr<XPCNativeInterface> Interface; + XPCNativeMember* protoMember; + + if (!FindMember(name, &Member, &Interface)) { + return false; + } + + *pMember = Member; + + *pIsLocal = !Member || !protoSet || + (protoSet != this && + !protoSet->MatchesSetUpToInterface(this, Interface) && + (!protoSet->FindMember(name, &protoMember, (uint16_t*)nullptr) || + protoMember != Member)); + + *pInterface = std::move(Interface); + + return true; +} + +inline bool XPCNativeSet::HasInterface(XPCNativeInterface* aInterface) const { + XPCNativeInterface* const* pp = mInterfaces; + + for (int i = (int)mInterfaceCount; i > 0; i--, pp++) { + if (aInterface == *pp) { + return true; + } + } + return false; +} + +inline bool XPCNativeSet::MatchesSetUpToInterface( + const XPCNativeSet* other, XPCNativeInterface* iface) const { + int count = std::min(int(mInterfaceCount), int(other->mInterfaceCount)); + + XPCNativeInterface* const* pp1 = mInterfaces; + XPCNativeInterface* const* pp2 = other->mInterfaces; + + for (int i = (int)count; i > 0; i--, pp1++, pp2++) { + XPCNativeInterface* cur = (*pp1); + if (cur != (*pp2)) { + return false; + } + if (cur == iface) { + return true; + } + } + return false; +} + +/***************************************************************************/ + +inline JSObject* XPCWrappedNativeTearOff::GetJSObjectPreserveColor() const { + return mJSObject.unbarrieredGetPtr(); +} + +inline JSObject* XPCWrappedNativeTearOff::GetJSObject() { return mJSObject; } + +inline void XPCWrappedNativeTearOff::SetJSObject(JSObject* JSObj) { + MOZ_ASSERT(!IsMarked()); + mJSObject = JSObj; +} + +inline void XPCWrappedNativeTearOff::JSObjectMoved(JSObject* obj, + const JSObject* old) { + MOZ_ASSERT(!IsMarked()); + MOZ_ASSERT(mJSObject == old); + mJSObject = obj; +} + +inline XPCWrappedNativeTearOff::~XPCWrappedNativeTearOff() { + MOZ_COUNT_DTOR(XPCWrappedNativeTearOff); + MOZ_ASSERT(!(GetInterface() || GetNative() || GetJSObjectPreserveColor()), + "tearoff not empty in dtor"); +} + +/***************************************************************************/ + +inline void XPCWrappedNative::SweepTearOffs() { + for (XPCWrappedNativeTearOff* to = &mFirstTearOff; to; + to = to->GetNextTearOff()) { + bool marked = to->IsMarked(); + to->Unmark(); + if (marked) { + continue; + } + + // If this tearoff does not have a live dedicated JSObject, + // then let's recycle it. + if (!to->GetJSObjectPreserveColor()) { + to->SetNative(nullptr); + to->SetInterface(nullptr); + } + } +} + +/***************************************************************************/ + +inline bool xpc_ForcePropertyResolve(JSContext* cx, JS::HandleObject obj, + jsid idArg) { + JS::RootedId id(cx, idArg); + bool dummy; + return JS_HasPropertyById(cx, obj, id, &dummy); +} + +inline jsid GetJSIDByIndex(JSContext* cx, unsigned index) { + XPCJSRuntime* xpcrt = nsXPConnect::GetRuntimeInstance(); + return xpcrt->GetStringID(index); +} + +inline bool ThrowBadParam(nsresult rv, unsigned paramNum, XPCCallContext& ccx) { + XPCThrower::ThrowBadParam(rv, paramNum, ccx); + return false; +} + +inline void ThrowBadResult(nsresult result, XPCCallContext& ccx) { + XPCThrower::ThrowBadResult(NS_ERROR_XPC_NATIVE_RETURNED_FAILURE, result, ccx); +} + +/***************************************************************************/ + +inline void xpc::CleanupValue(const nsXPTType& aType, void* aValue, + uint32_t aArrayLen) { + // Check if we can do a cheap early return, and only perform the inner call + // if we can't. We never have to clean up null pointer types or arithmetic + // types. + // + // NOTE: We can skip zeroing arithmetic types in CleanupValue, as they are + // already in a valid state. + if (aType.IsArithmetic() || (aType.IsPointer() && !*(void**)aValue)) { + return; + } + xpc::InnerCleanupValue(aType, aValue, aArrayLen); +} + +/***************************************************************************/ + +#endif /* xpcinlines_h___ */ |