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IInterface.h File Reference

#include "GaudiKernel/Kernel.h"
#include "GaudiKernel/StatusCode.h"
#include <ostream>

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Classes
class	InterfaceID
	Interface ID class. More...
class	IInterface
	Definition of the basic interface. More...
Functions
template<class I>
bool	isValidInterface (I *i)
	Templated function that throws an exception if the version if the interface implemented by the object behind the interface is incompatible.
std::ostream &	operator<< (std::ostream &s, const InterfaceID &id)
	ostream operator for InterfaceID. Needed by PluginSvc
template<class DEST, class SRC>
DEST **	pp_cast (SRC **ptr)
	Small function to be used instead of the construct (void**)&pointer, which produces, on gcc 4.1 optimized, the warning <quote>warning: dereferencing type-punned pointer will break strict-aliasing rules</quote> The assempler code produced is equivalent to the one with the direct cast.
Variables
static const InterfaceID	IID_IInterface (1, 0, 0)
	Typedef for backward compatibility on existing code.

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Function Documentation

template<class I>

bool isValidInterface

(

I *

i

)

Templated function that throws an exception if the version if the interface implemented by the object behind the interface is incompatible.

This is the case if the major version differs or that the minor version of the client is bigger than of the implementer.

Author:

Pere Mato

Definition at line 133 of file IInterface.h.

                             {
  void* ii;
  StatusCode sc =  i->queryInterface( I::interfaceID(), &ii);
  return sc.isSuccess();
}

std::ostream& operator<<	(	std::ostream &	s,
		const InterfaceID &	id
	)			[inline]

ostream operator for InterfaceID. Needed by PluginSvc

Definition at line 140 of file IInterface.h.

                                                                       {
    s << "IID_" << id.m_id;
    return s;
}

template<class DEST, class SRC>

DEST** pp_cast

(

SRC **

ptr

)

[inline]

Small function to be used instead of the construct (void**)&pointer, which produces, on gcc 4.1 optimized, the warning <quote>warning: dereferencing type-punned pointer will break strict-aliasing rules</quote> The assempler code produced is equivalent to the one with the direct cast.

The function can be used als to replace the construct (IInterface *&)m_MySvc. Replacement rules:

(void**)&pointer	pp_cast<void>(&pointer)
(IInterface *&)m_mySvc	*pp_cast<IInterface>(&m_mySvc)

Definition at line 156 of file IInterface.h.

                                {
  return reinterpret_cast<DEST**>(ptr);
}

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Variable Documentation

const InterfaceID IID_IInterface(1, 0, 0) [static]

Typedef for backward compatibility on existing code.

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