gistfile1.hpp

typedef void MainThreadFunction(void*);

void callOnMainThread(MainThreadFunction*, void* context);

template <typename T>
static void deref(void* obj)
{
    static_cast<T*>(obj)->deref();
}

template <typename T>
static void derefOnMainThread(RefPtr<T>& ref)
{
    callOnMainThread(deref, ref.release().releaseRef());
}

void foo() {
    RefPtr<Document> m_document = /*blah*/;
    derefOnMainThread(m_document);
}

/*
Database.cpp
.\storage\Database.cpp(183) : error C2664: 'WTF::callOnMainThread' : cannot convert parameter 1 from 'void (__cdecl *)(void *)' to 'WTF
::MainThreadFunction (__cdecl *)'
        None of the functions with this name in scope match the target type
        .\storage\Database.cpp(211) : see reference to function template instantiation 'void WebCore::derefOnMainThread<WebCore::Docume
nt>(WTF::RefPtr<T> &)' being compiled
        with
        [
            T=WebCore::Document
        ]
*/