bridges/source/cpp_uno/shared/cppinterfaceproxy.cxx

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  28
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  30
  31 #include "bridges/cpp_uno/shared/cppinterfaceproxy.hxx"
  32
  33 #include "guardedarray.hxx"
  34
  35 #include "bridges/cpp_uno/shared/bridge.hxx"
  36 #include "bridges/cpp_uno/shared/vtablefactory.hxx"
  37
  38 #include "com/sun/star/uno/XInterface.hpp"
  39 #include "osl/diagnose.h"
  40 #include "osl/getglobalmutex.hxx"
  41 #include "osl/interlck.h"
  42 #include "osl/mutex.hxx"
  43 #include "rtl/instance.hxx"
  44 #include "typelib/typedescription.h"
  45
  46 #include <cstddef>
  47 #include <new>
  48
  49
  50 static bridges::cpp_uno::shared::VtableFactory * pInstance;
  51
  52 #if defined(__GNUG__) && !defined(__MINGW32__)
  53 void dso_init(void) __attribute__((constructor));
  54 void dso_exit(void) __attribute__((destructor));
  55 #endif
  56
  57 void dso_init(void) {
  58     if (!pInstance)
  59         pInstance = new bridges::cpp_uno::shared::VtableFactory();
  60 }
  61
  62 void dso_exit(void) {
  63     if (pInstance)
  64     {
  65         delete pInstance;
  66         pInstance = NULL;
  67     }
  68 }
  69
  70 #ifdef __SUNPRO_CC
  71 # pragma init(dso_init)
  72 # pragma fini(dso_exit)
  73 #endif
  74
  75
  76
  77 namespace {
  78
  79 struct InitVtableFactory {
  80     bridges::cpp_uno::shared::VtableFactory * operator()() {
  81         return pInstance;
  82     }
  83 };
  84
  85 bridges::cpp_uno::shared::VtableFactory * getVtableFactory() {
  86     return rtl_Instance<
  87         bridges::cpp_uno::shared::VtableFactory, InitVtableFactory,
  88         osl::MutexGuard, osl::GetGlobalMutex >::create(
  89             InitVtableFactory(), osl::GetGlobalMutex());
  90 }
  91
  92 }
  93
  94 namespace bridges { namespace cpp_uno { namespace shared {
  95
  96 void freeCppInterfaceProxy(uno_ExtEnvironment * pEnv, void * pInterface)
  97 {
  98     CppInterfaceProxy * pThis = CppInterfaceProxy::castInterfaceToProxy(
  99         pInterface);
 100     if (pEnv != pThis->pBridge->getCppEnv()) {
 101         OSL_ASSERT(false);
 102     }
 103
 104     (*pThis->pBridge->getUnoEnv()->revokeInterface)(
 105         pThis->pBridge->getUnoEnv(), pThis->pUnoI );
 106     (*pThis->pUnoI->release)( pThis->pUnoI );
 107     ::typelib_typedescription_release(
 108         (typelib_TypeDescription *)pThis->pTypeDescr );
 109     pThis->pBridge->release();
 110
 111 #if OSL_DEBUG_LEVEL > 1
 112     *(int *)pInterface = 0xdeadbabe;
 113 #endif
 114     pThis->~CppInterfaceProxy();
 115     delete[] reinterpret_cast< char * >(pThis);
 116 }
 117
 118 com::sun::star::uno::XInterface * CppInterfaceProxy::create(
 119     bridges::cpp_uno::shared::Bridge * pBridge, uno_Interface * pUnoI,
 120     typelib_InterfaceTypeDescription * pTypeDescr, rtl::OUString const & rOId)
 121     SAL_THROW(())
 122 {
 123     typelib_typedescription_complete(
 124         reinterpret_cast< typelib_TypeDescription ** >(&pTypeDescr));
 125     bridges::cpp_uno::shared::VtableFactory::Vtables aVtables(
 126         getVtableFactory()->getVtables(pTypeDescr));
 127     bridges::cpp_uno::shared::GuardedArray< char > pMemory(
 128         new char[
 129             sizeof (CppInterfaceProxy)
 130             + (aVtables.count - 1) * sizeof (void **)]);
 131     new(pMemory.get()) CppInterfaceProxy(pBridge, pUnoI, pTypeDescr, rOId);
 132     CppInterfaceProxy * pProxy = reinterpret_cast< CppInterfaceProxy * >(
 133         pMemory.release());
 134     for (sal_Int32 i = 0; i < aVtables.count; ++i) {
 135         pProxy->vtables[i] = VtableFactory::mapBlockToVtable(
 136             aVtables.blocks[i].start);
 137     }
 138     return castProxyToInterface(pProxy);
 139 }
 140
 141 void CppInterfaceProxy::acquireProxy() SAL_THROW(())
 142 {
 143     if (1 == osl_incrementInterlockedCount( &nRef ))
 144     {
 145         // rebirth of proxy zombie
 146         // register at cpp env
 147         void * pThis = castProxyToInterface( this );
 148         (*pBridge->getCppEnv()->registerProxyInterface)(
 149             pBridge->getCppEnv(), &pThis, freeCppInterfaceProxy, oid.pData,
 150             pTypeDescr );
 151         OSL_ASSERT( pThis == castProxyToInterface( this ) );
 152     }
 153 }
 154
 155 void CppInterfaceProxy::releaseProxy() SAL_THROW(())
 156 {
 157     if (! osl_decrementInterlockedCount( &nRef )) // last release
 158     {
 159         // revoke from cpp env
 160         (*pBridge->getCppEnv()->revokeInterface)(
 161             pBridge->getCppEnv(), castProxyToInterface( this ) );
 162     }
 163 }
 164
 165 CppInterfaceProxy::CppInterfaceProxy(
 166     bridges::cpp_uno::shared::Bridge * pBridge_, uno_Interface * pUnoI_,
 167     typelib_InterfaceTypeDescription * pTypeDescr_, rtl::OUString const & rOId_)
 168     SAL_THROW(())
 169     : nRef( 1 )
 170     , pBridge( pBridge_ )
 171     , pUnoI( pUnoI_ )
 172     , pTypeDescr( pTypeDescr_ )
 173     , oid( rOId_ )
 174 {
 175     pBridge->acquire();
 176     ::typelib_typedescription_acquire( (typelib_TypeDescription *)pTypeDescr );
 177     (*pUnoI->acquire)( pUnoI );
 178     (*pBridge->getUnoEnv()->registerInterface)(
 179         pBridge->getUnoEnv(), reinterpret_cast< void ** >( &pUnoI ), oid.pData,
 180         pTypeDescr );
 181 }
 182
 183 CppInterfaceProxy::~CppInterfaceProxy()
 184 {}
 185
 186 com::sun::star::uno::XInterface * CppInterfaceProxy::castProxyToInterface(
 187     CppInterfaceProxy * pProxy)
 188 {
 189     return reinterpret_cast< com::sun::star::uno::XInterface * >(
 190         &pProxy->vtables);
 191 }
 192
 193 CppInterfaceProxy * CppInterfaceProxy::castInterfaceToProxy(void * pInterface)
 194 {
 195     // pInterface == &pProxy->vtables (this emulated offsetof is not truly
 196     // portable):
 197     char const * const base = reinterpret_cast< char const * >(16);
 198     std::ptrdiff_t const offset = reinterpret_cast< char const * >(
 199         &reinterpret_cast< CppInterfaceProxy const * >(base)->vtables) - base;
 200     return reinterpret_cast< CppInterfaceProxy * >(
 201         static_cast< char * >(pInterface) - offset);
 202 }
 203
 204 } } }
 205
 206 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */