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Reference.h
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19 #ifndef INCLUDED_COM_SUN_STAR_UNO_REFERENCE_H
20 #define INCLUDED_COM_SUN_STAR_UNO_REFERENCE_H
21 
22 #include <sal/config.h>
23 
24 #include <cassert>
25 #include <cstddef>
26 
27 #include <rtl/alloc.h>
28 
29 namespace com
30 {
31 namespace sun
32 {
33 namespace star
34 {
35 namespace uno
36 {
37 
38 class RuntimeException;
39 class XInterface;
40 class Type;
41 class Any;
42 
48 {
53 };
54 
59 {
60 protected:
63  XInterface * _pInterface;
64 
71  inline static XInterface * SAL_CALL iquery( XInterface * pInterface, const Type & rType );
79  inline static XInterface * SAL_CALL iquery_throw( XInterface * pInterface, const Type & rType );
80 
81 public:
86  inline XInterface * SAL_CALL get() const
87  { return _pInterface; }
88 
93  inline bool SAL_CALL is() const
94  { return (NULL != _pInterface); }
95 
102  inline bool SAL_CALL operator == ( XInterface * pInterface ) const;
109  inline bool SAL_CALL operator != ( XInterface * pInterface ) const;
110 
117  inline bool SAL_CALL operator == ( const BaseReference & rRef ) const;
124  inline bool SAL_CALL operator != ( const BaseReference & rRef ) const;
125 
131  inline bool SAL_CALL operator < ( const BaseReference & rRef ) const;
132 };
133 
137 {
141 };
146 {
150 };
157 {
159 };
160 
162 namespace detail {
163 
164 // A mechanism to enable up-casts, used by the Reference conversion constructor,
165 // but at the same time disable up-casts to XInterface, so that the conversion
166 // operator for that special case is used in an expression like
167 // Reference< XInterface >(x); heavily borrowed from boost::is_base_and_derived
168 // (which manages to avoid compilation problems with ambiguous bases and cites
169 // comp.lang.c++.moderated mail <http://groups.google.com/groups?
170 // selm=df893da6.0301280859.522081f7%40posting.google.com> "SuperSubclass
171 // (is_base_and_derived) complete implementation!" by Rani Sharoni and cites
172 // Aleksey Gurtovoy for the workaround for MSVC), to avoid including Boost
173 // headers in URE headers (could ultimately be based on C++11 std::is_base_of):
174 
175 template< typename T1, typename T2 > struct UpCast {
176 private:
177  template< bool, typename U1, typename > struct C
178  { typedef U1 t; };
179 
180  template< typename U1, typename U2 > struct C< false, U1, U2 >
181  { typedef U2 t; };
182 
183  struct S { char c[2]; };
184 
185 #if defined _MSC_VER && _MSC_VER < 1800
186  static char f(T2 *, long);
187  static S f(T1 * const &, int);
188 #else
189  template< typename U > static char f(T2 *, U);
190  static S f(T1 *, int);
191 #endif
192 
193  struct H {
194  H(); // avoid C2514 "class has no constructors" from MSVC
195 #if defined _MSC_VER && _MSC_VER < 1800
196  operator T1 * const & () const;
197 #else
198  operator T1 * () const;
199 #endif
200  operator T2 * ();
201  };
202 
203 public:
204  typedef typename C< sizeof (f(H(), 0)) == 1, void *, void >::t t;
205 };
206 
207 template< typename T2 > struct UpCast< XInterface, T2 > {};
208 
209 }
211 
216 template< class interface_type >
217 class SAL_DLLPUBLIC_RTTI Reference : public BaseReference
218 {
224  inline static XInterface * SAL_CALL iquery( XInterface * pInterface );
231  inline static XInterface * SAL_CALL iquery_throw( XInterface * pInterface );
237  inline static interface_type * SAL_CALL iset_throw( interface_type * pInterface );
238 
250  static inline interface_type * castFromXInterface(XInterface * p) {
251  return static_cast< interface_type * >(static_cast< void * >(p));
252  }
253 
265  static inline XInterface * castToXInterface(interface_type * p) {
266  return static_cast< XInterface * >(static_cast< void * >(p));
267  }
268 
269 public:
271  // these are here to force memory de/allocation to sal lib.
272  inline static void * SAL_CALL operator new ( ::size_t nSize )
273  { return ::rtl_allocateMemory( nSize ); }
274  inline static void SAL_CALL operator delete ( void * pMem )
275  { ::rtl_freeMemory( pMem ); }
276  inline static void * SAL_CALL operator new ( ::size_t, void * pMem )
277  { return pMem; }
278  inline static void SAL_CALL operator delete ( void *, void * )
279  {}
281 
284  inline ~Reference();
285 
288  inline Reference();
289 
294  inline Reference( const Reference< interface_type > & rRef );
295 
296 #if defined LIBO_INTERNAL_ONLY
297 
301  inline Reference( Reference< interface_type > && rRef );
302 #endif
303 
312  template< class derived_type >
313  inline Reference(
314  const Reference< derived_type > & rRef,
315  typename detail::UpCast< interface_type, derived_type >::t = 0 );
316 
321  inline Reference( interface_type * pInterface );
322 
328  inline Reference( interface_type * pInterface, __sal_NoAcquire dummy);
336  inline SAL_DEPRECATED("use SAL_NO_ACQUIRE version") Reference( interface_type * pInterface, UnoReference_NoAcquire dummy );
337 
343  inline Reference( const BaseReference & rRef, UnoReference_Query dummy );
349  inline Reference( XInterface * pInterface, UnoReference_Query dummy);
355  inline Reference( const Any & rAny, UnoReference_Query dummy);
363  inline Reference( const BaseReference & rRef, UnoReference_QueryThrow dummy );
371  inline Reference( XInterface * pInterface, UnoReference_QueryThrow dummy );
379  inline Reference( const Any & rAny, UnoReference_QueryThrow dummy );
388  inline Reference( const Reference< interface_type > & rRef, UnoReference_SetThrow dummy );
397  inline Reference( interface_type * pInterface, UnoReference_SetThrow dummy );
398 
403  inline SAL_CALL operator const Reference< XInterface > & () const
404  { return * reinterpret_cast< const Reference< XInterface > * >( this ); }
405 
410  inline interface_type * SAL_CALL operator -> () const {
411  assert(_pInterface != NULL);
412  return castFromXInterface(_pInterface);
413  }
414 
419  inline interface_type * SAL_CALL get() const
420  { return castFromXInterface(_pInterface); }
421 
424  inline void SAL_CALL clear();
425 
431  inline bool SAL_CALL set( const Reference< interface_type > & rRef );
437  inline bool SAL_CALL set( interface_type * pInterface );
438 
445  inline bool SAL_CALL set( interface_type * pInterface, __sal_NoAcquire dummy);
454  inline SAL_DEPRECATED("use SAL_NO_ACQUIRE version") bool SAL_CALL set( interface_type * pInterface, UnoReference_NoAcquire dummy);
455 
463  inline bool SAL_CALL set( XInterface * pInterface, UnoReference_Query dummy );
471  inline bool SAL_CALL set( const BaseReference & rRef, UnoReference_Query dummy);
472 
484  inline bool set( Any const & rAny, UnoReference_Query dummy );
485 
494  inline void SAL_CALL set( XInterface * pInterface, UnoReference_QueryThrow dummy );
503  inline void SAL_CALL set( const BaseReference & rRef, UnoReference_QueryThrow dummy );
504 
514  inline void set( Any const & rAny, UnoReference_QueryThrow dummy);
524  inline void SAL_CALL set( interface_type * pInterface, UnoReference_SetThrow dummy);
534  inline void SAL_CALL set( const Reference< interface_type > & rRef, UnoReference_SetThrow dummy);
535 
536 
543  inline Reference< interface_type > & SAL_CALL operator = ( interface_type * pInterface );
550  inline Reference< interface_type > & SAL_CALL operator = ( const Reference< interface_type > & rRef );
551 #if defined LIBO_INTERNAL_ONLY
552 
558  inline Reference< interface_type > & SAL_CALL operator = ( Reference< interface_type > && rRef );
559 #endif
560 
565  inline static SAL_WARN_UNUSED_RESULT Reference< interface_type > SAL_CALL query( const BaseReference & rRef );
571  inline static SAL_WARN_UNUSED_RESULT Reference< interface_type > SAL_CALL query( XInterface * pInterface );
572 };
573 
574 }
575 }
576 }
577 }
578 
579 #endif
580 
581 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
bool is() const
Checks if reference is null.
Definition: Reference.h:93
This enum value can be used for implicit interface query.
Definition: Reference.h:140
C++ class representing an IDL any.
Definition: Any.h:52
SAL_DLLPUBLIC void rtl_freeMemory(void *Ptr) SAL_THROW_EXTERN_C()
Free memory.
UnoReference_QueryThrow
Enum defining UNO_QUERY_THROW for implicit interface query.
Definition: Reference.h:145
UnoReference_Query
Enum defining UNO_QUERY for implicit interface query.
Definition: Reference.h:136
__sal_NoAcquire
Definition: types.h:384
#define SAL_WARN_UNUSED_RESULT
Use this as markup for functions and methods whose return value must be checked.
Definition: types.h:325
C++ class representing an IDL meta type.
Definition: Type.h:54
bool operator==(XInterface *pInterface) const
Equality operator: compares two interfaces Checks if both references are null or refer to the same ob...
Definition: Reference.hxx:383
bool operator!=(XInterface *pInterface) const
Unequality operator: compares two interfaces Checks if both references are null or refer to the same ...
Definition: Reference.hxx:420
UnoReference_SetThrow
Enum defining UNO_SET_THROW for throwing if attempts are made to assign a null interface.
Definition: Reference.h:156
Definition: Reference.h:158
#define SAL_DEPRECATED(message)
Use as follows: SAL_DEPRECATED(&quot;Don&#39;t use, it&#39;s evil.&quot;) void doit(int nPara);.
Definition: types.h:509
Template reference class for interface type derived from BaseReference.
Definition: unotype.hxx:39
SAL_DLLPUBLIC void * rtl_allocateMemory(sal_Size Bytes) SAL_THROW_EXTERN_C()
Allocate memory.
This enum value can be used for creating a reference granting a given interface, i.e.
Definition: Reference.h:52
This base class serves as a base class for all template reference classes and has been introduced due...
Definition: Reference.h:58
This enum value can be used for implicit interface query.
Definition: Reference.h:149
static XInterface * iquery(XInterface *pInterface, const Type &rType)
Queries given interface for type rType.
Definition: Reference.hxx:49
UnoReference_NoAcquire
Enum defining UNO_REF_NO_ACQUIRE for setting reference without acquiring a given interface.
Definition: Reference.h:47
bool operator<(const BaseReference &rRef) const
Needed by some STL containers.
Definition: Reference.hxx:401
static XInterface * iquery_throw(XInterface *pInterface, const Type &rType)
Queries given interface for type rType.
Definition: Reference.hxx:72
XInterface * _pInterface
the interface pointer
Definition: Reference.h:63