private static unsafe IntPtr RhResolveDispatchWorker(object pObject, void *cell, ref DispatchCellInfo cellInfo)
{
// Type of object we're dispatching on.
MethodTable *pInstanceType = pObject.GetMethodTable();
if (cellInfo.CellType == DispatchCellType.InterfaceAndSlot)
{
// Type whose DispatchMap is used. Usually the same as the above but for types which implement IDynamicInterfaceCastable
// we may repeat this process with an alternate type.
MethodTable *pResolvingInstanceType = pInstanceType;
IntPtr pTargetCode = DispatchResolve.FindInterfaceMethodImplementationTarget(pResolvingInstanceType,
cellInfo.InterfaceType.ToPointer(),
cellInfo.InterfaceSlot,
ppGenericContext: null);
if (pTargetCode == IntPtr.Zero && pInstanceType->IsIDynamicInterfaceCastable)
{
// Dispatch not resolved through normal dispatch map, try using the IDynamicInterfaceCastable
// This will either give us the appropriate result, or throw.
var pfnGetInterfaceImplementation = (delegate * < object, MethodTable *, ushort, IntPtr >)
pInstanceType->GetClasslibFunction(ClassLibFunctionId.IDynamicCastableGetInterfaceImplementation);
pTargetCode = pfnGetInterfaceImplementation(pObject, cellInfo.InterfaceType.ToPointer(), cellInfo.InterfaceSlot);
Diagnostics.Debug.Assert(pTargetCode != IntPtr.Zero);
}
return(pTargetCode);
}
else if (cellInfo.CellType == DispatchCellType.VTableOffset)
{
// Dereference VTable
return(*(IntPtr *)(((byte *)pInstanceType) + cellInfo.VTableOffset));
}
else
{
#if SUPPORTS_NATIVE_METADATA_TYPE_LOADING_AND_SUPPORTS_TOKEN_BASED_DISPATCH_CELLS
// Attempt to convert dispatch cell to non-metadata form if we haven't acquired a cache for this cell yet
if (cellInfo.HasCache == 0)
{
cellInfo = InternalTypeLoaderCalls.ConvertMetadataTokenDispatch(InternalCalls.RhGetModuleFromPointer(cell), cellInfo);
if (cellInfo.CellType != DispatchCellType.MetadataToken)
{
return(RhResolveDispatchWorker(pObject, cell, ref cellInfo));
}
}
// If that failed, go down the metadata resolution path
return(InternalTypeLoaderCalls.ResolveMetadataTokenDispatch(InternalCalls.RhGetModuleFromPointer(cell), (int)cellInfo.MetadataToken, new IntPtr(pInstanceType)));
#else
EH.FallbackFailFast(RhFailFastReason.InternalError, null);
return(IntPtr.Zero);
#endif
}
}
private static unsafe IntPtr RhResolveDispatchWorker(object pObject, void *cell, ref DispatchCellInfo cellInfo)
{
// Type of object we're dispatching on.
EEType *pInstanceType = pObject.EEType;
if (cellInfo.CellType == DispatchCellType.InterfaceAndSlot)
{
// Type whose DispatchMap is used.
EEType *pResolvingInstanceType = pInstanceType;
IntPtr pTargetCode = DispatchResolve.FindInterfaceMethodImplementationTarget(pResolvingInstanceType,
cellInfo.InterfaceType.ToPointer(),
cellInfo.InterfaceSlot);
return(pTargetCode);
}
else if (cellInfo.CellType == DispatchCellType.VTableOffset)
{
// Dereference VTable
return(*(IntPtr *)(((byte *)pInstanceType) + cellInfo.VTableOffset));
}
else
{
#if SUPPORTS_NATIVE_METADATA_TYPE_LOADING_AND_SUPPORTS_TOKEN_BASED_DISPATCH_CELLS
// Attempt to convert dispatch cell to non-metadata form if we haven't acquired a cache for this cell yet
if (cellInfo.HasCache == 0)
{
cellInfo = InternalTypeLoaderCalls.ConvertMetadataTokenDispatch(InternalCalls.RhGetModuleFromPointer(cell), cellInfo);
if (cellInfo.CellType != DispatchCellType.MetadataToken)
{
return(RhResolveDispatchWorker(pObject, cell, ref cellInfo));
}
}
// If that failed, go down the metadata resolution path
return(InternalTypeLoaderCalls.ResolveMetadataTokenDispatch(InternalCalls.RhGetModuleFromPointer(cell), (int)cellInfo.MetadataToken, new IntPtr(pInstanceType)));
#else
EH.FallbackFailFast(RhFailFastReason.InternalError, null);
return(IntPtr.Zero);
#endif
}
}
private static unsafe IntPtr RhResolveDispatchWorker(object pObject, void *cell, ref DispatchCellInfo cellInfo)
{
// Type of object we're dispatching on.
EEType *pInstanceType = pObject.EEType;
if (cellInfo.CellType == DispatchCellType.InterfaceAndSlot)
{
// Type whose DispatchMap is used. Usually the same as the above but for types which implement ICastable
// we may repeat this process with an alternate type.
EEType *pResolvingInstanceType = pInstanceType;
IntPtr pTargetCode = DispatchResolve.FindInterfaceMethodImplementationTarget(pResolvingInstanceType,
cellInfo.InterfaceType.ToPointer(),
cellInfo.InterfaceSlot);
if (pTargetCode == IntPtr.Zero && pInstanceType->IsICastable)
{
// TODO!! BEGIN REMOVE THIS CODE WHEN WE REMOVE ICASTABLE
// Dispatch not resolved through normal dispatch map, try using the ICastable
// Call the ICastable.IsInstanceOfInterface method directly rather than via an interface
// dispatch since we know the method address statically. We ignore any cast error exception
// object passed back on failure (result == false) since IsInstanceOfInterface never throws.
IntPtr pfnIsInstanceOfInterface = pInstanceType->ICastableIsInstanceOfInterfaceMethod;
Exception castError = null;
if (CalliIntrinsics.Call <bool>(pfnIsInstanceOfInterface, pObject, cellInfo.InterfaceType.ToPointer(), out castError))
{
IntPtr pfnGetImplTypeMethod = pInstanceType->ICastableGetImplTypeMethod;
pResolvingInstanceType = (EEType *)CalliIntrinsics.Call <IntPtr>(pfnGetImplTypeMethod, pObject, new IntPtr(cellInfo.InterfaceType.ToPointer()));
pTargetCode = DispatchResolve.FindInterfaceMethodImplementationTarget(pResolvingInstanceType,
cellInfo.InterfaceType.ToPointer(),
cellInfo.InterfaceSlot);
}
else
// TODO!! END REMOVE THIS CODE WHEN WE REMOVE ICASTABLE
{
// Dispatch not resolved through normal dispatch map, using the CastableObject path
pTargetCode = InternalCalls.RhpGetCastableObjectDispatchHelper();
}
}
return(pTargetCode);
}
else if (cellInfo.CellType == DispatchCellType.VTableOffset)
{
// Dereference VTable
return(*(IntPtr *)(((byte *)pInstanceType) + cellInfo.VTableOffset));
}
else
{
#if SUPPORTS_NATIVE_METADATA_TYPE_LOADING
// Attempt to convert dispatch cell to non-metadata form if we haven't acquired a cache for this cell yet
if (cellInfo.HasCache == 0)
{
cellInfo = InternalTypeLoaderCalls.ConvertMetadataTokenDispatch(InternalCalls.RhGetModuleFromPointer(cell), cellInfo);
if (cellInfo.CellType != DispatchCellType.MetadataToken)
{
return(RhResolveDispatchWorker(pObject, cell, ref cellInfo));
}
}
// If that failed, go down the metadata resolution path
return(InternalTypeLoaderCalls.ResolveMetadataTokenDispatch(InternalCalls.RhGetModuleFromPointer(cell), (int)cellInfo.MetadataToken, new IntPtr(pInstanceType)));
#else
EH.FallbackFailFast(RhFailFastReason.InternalError, null);
return(IntPtr.Zero);
#endif
}
}
