diff options
| -rw-r--r-- | comphelper/source/misc/compbase.cxx | 181 | ||||
| -rw-r--r-- | include/comphelper/compbase.hxx | 23 |
2 files changed, 197 insertions, 7 deletions
diff --git a/comphelper/source/misc/compbase.cxx b/comphelper/source/misc/compbase.cxx index 6e2019a255ae..ff3c4778b2ba 100644 --- a/comphelper/source/misc/compbase.cxx +++ b/comphelper/source/misc/compbase.cxx @@ -8,6 +8,8 @@ */ #include <comphelper/compbase.hxx> +#include <sal/log.hxx> +#include <osl/diagnose.h> namespace comphelper { @@ -45,6 +47,185 @@ void SAL_CALL WeakComponentImplHelperBase::removeEventListener( maEventListeners.removeInterface(rxListener); } +css::uno::Any SAL_CALL WeakComponentImplHelperBase::queryInterface(css::uno::Type const& rType) +{ + css::uno::Any aReturn = ::cppu::queryInterface(rType, static_cast<css::uno::XWeak*>(this), + static_cast<css::lang::XComponent*>(this)); + if (aReturn.hasValue()) + return aReturn; + return OWeakObject::queryInterface(rType); +} + +static void checkInterface(css::uno::Type const& rType) +{ + if (css::uno::TypeClass_INTERFACE != rType.getTypeClass()) + { + OUString msg("querying for interface \"" + rType.getTypeName() + "\": no interface type!"); + SAL_WARN("cppuhelper", msg); + throw css::uno::RuntimeException(msg); + } +} + +static bool isXInterface(rtl_uString* pStr) +{ + return OUString::unacquired(&pStr) == "com.sun.star.uno.XInterface"; +} + +static bool td_equals(typelib_TypeDescriptionReference const* pTDR1, + typelib_TypeDescriptionReference const* pTDR2) +{ + return ((pTDR1 == pTDR2) + || OUString::unacquired(&pTDR1->pTypeName) == OUString::unacquired(&pTDR2->pTypeName)); +} + +static cppu::type_entry* getTypeEntries(cppu::class_data* cd) +{ + cppu::type_entry* pEntries = cd->m_typeEntries; + if (!cd->m_storedTypeRefs) // not inited? + { + static std::mutex aMutex; + std::scoped_lock guard(aMutex); + if (!cd->m_storedTypeRefs) // not inited? + { + // get all types + for (sal_Int32 n = cd->m_nTypes; n--;) + { + cppu::type_entry* pEntry = &pEntries[n]; + css::uno::Type const& rType = (*pEntry->m_type.getCppuType)(nullptr); + OSL_ENSURE(rType.getTypeClass() == css::uno::TypeClass_INTERFACE, + "### wrong helper init: expected interface!"); + OSL_ENSURE( + !isXInterface(rType.getTypeLibType()->pTypeName), + "### want to implement XInterface: template argument is XInterface?!?!?!"); + if (rType.getTypeClass() != css::uno::TypeClass_INTERFACE) + { + OUString msg("type \"" + rType.getTypeName() + "\" is no interface type!"); + SAL_WARN("cppuhelper", msg); + throw css::uno::RuntimeException(msg); + } + // ref is statically held by getCppuType() + pEntry->m_type.typeRef = rType.getTypeLibType(); + } + OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER(); + cd->m_storedTypeRefs = true; + } + } + else + { + OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER(); + } + return pEntries; +} + +static void* makeInterface(sal_IntPtr nOffset, void* that) +{ + return (static_cast<char*>(that) + nOffset); +} + +static bool recursivelyFindType(typelib_TypeDescriptionReference const* demandedType, + typelib_InterfaceTypeDescription const* type, sal_IntPtr* offset) +{ + // This code assumes that the vtables of a multiple-inheritance class (the + // offset amount by which to adjust the this pointer) follow one another in + // the object layout, and that they contain slots for the inherited classes + // in a specific order. In theory, that need not hold for any given + // platform; in practice, it seems to work well on all supported platforms: +next: + for (sal_Int32 i = 0; i < type->nBaseTypes; ++i) + { + if (i > 0) + { + *offset += sizeof(void*); + } + typelib_InterfaceTypeDescription const* base = type->ppBaseTypes[i]; + // ignore XInterface: + if (base->nBaseTypes > 0) + { + if (td_equals(reinterpret_cast<typelib_TypeDescriptionReference const*>(base), + demandedType)) + { + return true; + } + // Profiling showed that it is important to speed up the common case + // of only one base: + if (type->nBaseTypes == 1) + { + type = base; + goto next; + } + if (recursivelyFindType(demandedType, base, offset)) + { + return true; + } + } + } + return false; +} + +static void* queryDeepNoXInterface(typelib_TypeDescriptionReference const* pDemandedTDR, + cppu::class_data* cd, void* that) +{ + cppu::type_entry* pEntries = getTypeEntries(cd); + sal_Int32 nTypes = cd->m_nTypes; + sal_Int32 n; + + // try top interfaces without getting td + for (n = 0; n < nTypes; ++n) + { + if (td_equals(pEntries[n].m_type.typeRef, pDemandedTDR)) + { + return makeInterface(pEntries[n].m_offset, that); + } + } + // query deep getting td + for (n = 0; n < nTypes; ++n) + { + typelib_TypeDescription* pTD = nullptr; + TYPELIB_DANGER_GET(&pTD, pEntries[n].m_type.typeRef); + if (pTD) + { + // exclude top (already tested) and bottom (XInterface) interface + OSL_ENSURE(reinterpret_cast<typelib_InterfaceTypeDescription*>(pTD)->nBaseTypes > 0, + "### want to implement XInterface:" + " template argument is XInterface?!?!?!"); + sal_IntPtr offset = pEntries[n].m_offset; + bool found = recursivelyFindType( + pDemandedTDR, reinterpret_cast<typelib_InterfaceTypeDescription*>(pTD), &offset); + TYPELIB_DANGER_RELEASE(pTD); + if (found) + { + return makeInterface(offset, that); + } + } + else + { + OUString msg("cannot get type description for type \"" + + OUString::unacquired(&pEntries[n].m_type.typeRef->pTypeName) + "\"!"); + SAL_WARN("cppuhelper", msg); + throw css::uno::RuntimeException(msg); + } + } + return nullptr; +} + +css::uno::Any WeakComponentImplHelper_query(css::uno::Type const& rType, cppu::class_data* cd, + WeakComponentImplHelperBase* pBase) +{ + checkInterface(rType); + typelib_TypeDescriptionReference* pTDR = rType.getTypeLibType(); + + // shortcut XInterface to WeakComponentImplHelperBase + if (!isXInterface(pTDR->pTypeName)) + { + void* p = queryDeepNoXInterface(pTDR, cd, pBase); + if (p) + { + return css::uno::Any(&p, pTDR); + } + } + return pBase->comphelper::WeakComponentImplHelperBase::queryInterface(rType); +} + } // namespace comphelper /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */ diff --git a/include/comphelper/compbase.hxx b/include/comphelper/compbase.hxx index 5b7e1f7ba7a1..38380ede20d0 100644 --- a/include/comphelper/compbase.hxx +++ b/include/comphelper/compbase.hxx @@ -15,6 +15,7 @@ #include <comphelper/interfacecontainer4.hxx> #include <cppuhelper/weak.hxx> #include <cppuhelper/queryinterface.hxx> +#include <cppuhelper/implbase.hxx> #include <com/sun/star/lang/XComponent.hpp> #include <com/sun/star/lang/XTypeProvider.hpp> #include <mutex> @@ -40,6 +41,8 @@ public: virtual void SAL_CALL removeEventListener(css::uno::Reference<css::lang::XEventListener> const& rxListener) override; + virtual css::uno::Any SAL_CALL queryInterface(css::uno::Type const& rType) override; + /** Called by dispose for subclasses to do dispose() work. The mutex is held when called, and subclasses can unlock() the guard if necessary. @@ -80,13 +83,7 @@ public: virtual css::uno::Any SAL_CALL queryInterface(css::uno::Type const& rType) override { - css::uno::Any aReturn = ::cppu::queryInterface( - rType, static_cast<css::uno::XWeak*>(this), - static_cast<css::lang::XComponent*>(static_cast<WeakComponentImplHelperBase*>(this)), - static_cast<css::lang::XTypeProvider*>(this), static_cast<Ifc*>(this)...); - if (aReturn.hasValue()) - return aReturn; - return OWeakObject::queryInterface(rType); + return WeakComponentImplHelper_query(rType, class_data_get(), this); } // css::lang::XTypeProvider @@ -102,8 +99,20 @@ public: { return css::uno::Sequence<sal_Int8>(); } + +private: + static cppu::class_data* class_data_get() + { + return cppu::detail::ImplClassData<WeakComponentImplHelper, Ifc...>{}(); + } }; +/** WeakComponentImplHelper +*/ +COMPHELPER_DLLPUBLIC css::uno::Any +WeakComponentImplHelper_query(css::uno::Type const& rType, cppu::class_data* cd, + WeakComponentImplHelperBase* pBase); + } // namespace comphelper /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */ |