nsIPrincipal is not yet threadsafe (bug 1443925). This is a problem in the context of threadsafe nsIURI, where cloning an nsIURI would also AddRef the principal.
To get around this problem, we use nsMainThreadPtrHandle<nsIPrincipal>. This means cloning the URI would not AddRef the principal (it addrefs the nsMainThreadPtrHolder that holds the principal). When the last ref is dropped, the principal is released on the main thread.
We should get rid of this once principals become thread-safe
MozReview-Commit-ID: AbJEhTNXVv6
* blobImpl references are now only kept in nsHostObjectProtocolHandler
* removes nsHostObjectProtocolHandler.idl
* Makes nsHostObjectURI no longer inherit from nsSupportsWeakReference
MozReview-Commit-ID: AC1klrfsMnn
* Deserialization now only happens via a mutator
* The CID for URI implementations actually returns the nsIURIMutator for each class
* The QueryInterface of mutators implementing nsISerializable will now act as a finalizer if passed the IID of an interface implemented by the URI it holds
MozReview-Commit-ID: H5MUJOEkpia
* Deserialization now only happens via a mutator
* The CID for URI implementations actually returns the nsIURIMutator for each class
* The QueryInterface of mutators implementing nsISerializable will now act as a finalizer if passed the IID of an interface implemented by the URI it holds
MozReview-Commit-ID: H5MUJOEkpia
* The method can be chained just as the other methods on NS_MutateURI.
* In case the mutator object does not implement the interface, mStatus will be set to an error code.
* This is useful when you are constructing a new URI and the type of the mutator is known. I expect a future patch will add a MaybeApply method, that does not set mStatus to an error code if the mutator does not implement the interface.
* This patch changes nsHostObjectProtocolHandler::NewURI to use the new method and avoid a static_cast<nsHostObjectURI*>(uri)
MozReview-Commit-ID: 9kvXJX54gUP
This also changes URIUtils.cpp:DeserializeURI() to use the mutator to instantiate new URIs, instead of using their default constructor.
MozReview-Commit-ID: JQOvIquuQAP
