mirror of
https://github.com/mozilla/gecko-dev.git
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140 lines
2.5 KiB
C++
140 lines
2.5 KiB
C++
/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_workers_dombindingbase_h__
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#define mozilla_dom_workers_dombindingbase_h__
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#include "mozilla/dom/workers/Workers.h"
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#include "nsISupportsImpl.h"
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#include "nsWrapperCache.h"
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class nsIThreadJSContextStack;
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BEGIN_WORKERS_NAMESPACE
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#define BINDING_ENSURE_TRUE(_cond, _result, _retval) \
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PR_BEGIN_MACRO \
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if (!(_cond)) { \
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NS_WARNING("BINDING_ENSURE failed!"); \
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aRv = _result; \
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return _retval; \
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} \
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PR_END_MACRO
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#define BINDING_ENSURE_SUCCESS(_cond, _result, _retval) \
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BINDING_ENSURE_TRUE(NS_SUCCEEDED(_cond), _result, _retval)
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class DOMBindingBase : public nsWrapperCache,
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public nsISupports
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{
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JSContext* mJSContext;
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mutable nsCOMPtr<nsIThreadJSContextStack> mContextStack;
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protected:
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DOMBindingBase(JSContext* aCx);
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virtual ~DOMBindingBase();
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virtual void
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_trace(JSTracer* aTrc);
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virtual void
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_finalize(JSFreeOp* aFop);
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JSContext*
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GetJSContextFromContextStack() const;
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public:
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NS_DECL_ISUPPORTS
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JSContext*
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GetJSContext() const
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{
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return mJSContext ? mJSContext : GetJSContextFromContextStack();
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}
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#ifdef DEBUG
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JSObject*
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GetJSObject() const;
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void
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SetJSObject(JSObject* aObject);
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#else
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JSObject*
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GetJSObject() const
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{
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// Reach in and grab the bits directly.
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return GetJSObjectFromBits();
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}
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void
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SetJSObject(JSObject* aObject)
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{
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// Set the bits directly.
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SetWrapperBits(aObject);
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}
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#endif
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};
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template <class T>
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class DOMBindingAnchor
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{
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T* mBinding;
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JS::Anchor<JSObject*> mAnchor;
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public:
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DOMBindingAnchor()
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: mBinding(NULL)
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{ }
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DOMBindingAnchor(T* aBinding)
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{
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*this = aBinding;
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}
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DOMBindingAnchor&
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operator=(T* aBinding)
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{
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mBinding = aBinding;
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if (aBinding) {
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JSObject* obj = aBinding->GetJSObject();
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MOZ_ASSERT(obj);
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mAnchor.set(obj);
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}
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else {
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mAnchor.clear();
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}
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}
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T*
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get() const
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{
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return const_cast<T*>(mBinding);
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}
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T*
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operator->() const
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{
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return get();
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}
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operator T*() const
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{
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return get();
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}
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private:
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DOMBindingAnchor(const DOMBindingAnchor& aOther) MOZ_DELETE;
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DOMBindingAnchor&
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operator=(const DOMBindingAnchor& aOther) MOZ_DELETE;
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};
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END_WORKERS_NAMESPACE
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#endif // mozilla_dom_workers_dombindingbase_h__
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