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annotate libovr/Src/Kernel/OVR_RefCount.h @ 11:39ec672a5158

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added simple head model to the VR camera
author John Tsiombikas <nuclear@member.fsf.org>
date Fri, 20 Sep 2013 07:00:18 +0300
parents e2f9e4603129
children
rev   line source
nuclear@3 1 /************************************************************************************
nuclear@3 2
nuclear@3 3 PublicHeader: Kernel
nuclear@3 4 Filename : OVR_RefCount.h
nuclear@3 5 Content : Reference counting implementation headers
nuclear@3 6 Created : September 19, 2012
nuclear@3 7 Notes :
nuclear@3 8
nuclear@3 9 Copyright : Copyright 2012 Oculus VR, Inc. All Rights reserved.
nuclear@3 10
nuclear@3 11 Use of this software is subject to the terms of the Oculus license
nuclear@3 12 agreement provided at the time of installation or download, or which
nuclear@3 13 otherwise accompanies this software in either electronic or hard copy form.
nuclear@3 14
nuclear@3 15 ************************************************************************************/
nuclear@3 16
nuclear@3 17 #ifndef OVR_RefCount_h
nuclear@3 18 #define OVR_RefCount_h
nuclear@3 19
nuclear@3 20 #include "OVR_Types.h"
nuclear@3 21 #include "OVR_Allocator.h"
nuclear@3 22
nuclear@3 23 namespace OVR {
nuclear@3 24
nuclear@3 25 //-----------------------------------------------------------------------------------
nuclear@3 26 // ***** Reference Counting
nuclear@3 27
nuclear@3 28 // There are three types of reference counting base classes:
nuclear@3 29 //
nuclear@3 30 // RefCountBase - Provides thread-safe reference counting (Default).
nuclear@3 31 // RefCountBaseNTS - Non Thread Safe version of reference counting.
nuclear@3 32
nuclear@3 33
nuclear@3 34 // ***** Declared classes
nuclear@3 35
nuclear@3 36 template<class C>
nuclear@3 37 class RefCountBase;
nuclear@3 38 template<class C>
nuclear@3 39 class RefCountBaseNTS;
nuclear@3 40
nuclear@3 41 class RefCountImpl;
nuclear@3 42 class RefCountNTSImpl;
nuclear@3 43
nuclear@3 44
nuclear@3 45 //-----------------------------------------------------------------------------------
nuclear@3 46 // ***** Implementation For Reference Counting
nuclear@3 47
nuclear@3 48 // RefCountImplCore holds RefCount value and defines a few utility
nuclear@3 49 // functions shared by all implementations.
nuclear@3 50
nuclear@3 51 class RefCountImplCore
nuclear@3 52 {
nuclear@3 53 protected:
nuclear@3 54 volatile int RefCount;
nuclear@3 55
nuclear@3 56 public:
nuclear@3 57 // RefCountImpl constructor always initializes RefCount to 1 by default.
nuclear@3 58 OVR_FORCE_INLINE RefCountImplCore() : RefCount(1) { }
nuclear@3 59
nuclear@3 60 // Need virtual destructor
nuclear@3 61 // This: 1. Makes sure the right destructor's called.
nuclear@3 62 // 2. Makes us have VTable, necessary if we are going to have format needed by InitNewMem()
nuclear@3 63 virtual ~RefCountImplCore();
nuclear@3 64
nuclear@3 65 // Debug method only.
nuclear@3 66 int GetRefCount() const { return RefCount; }
nuclear@3 67
nuclear@3 68 // This logic is used to detect invalid 'delete' calls of reference counted
nuclear@3 69 // objects. Direct delete calls are not allowed on them unless they come in
nuclear@3 70 // internally from Release.
nuclear@3 71 #ifdef OVR_BUILD_DEBUG
nuclear@3 72 static void OVR_CDECL reportInvalidDelete(void *pmem);
nuclear@3 73 inline static void checkInvalidDelete(RefCountImplCore *pmem)
nuclear@3 74 {
nuclear@3 75 if (pmem->RefCount != 0)
nuclear@3 76 reportInvalidDelete(pmem);
nuclear@3 77 }
nuclear@3 78 #else
nuclear@3 79 inline static void checkInvalidDelete(RefCountImplCore *) { }
nuclear@3 80 #endif
nuclear@3 81
nuclear@3 82 // Base class ref-count content should not be copied.
nuclear@3 83 void operator = (const RefCountImplCore &) { }
nuclear@3 84 };
nuclear@3 85
nuclear@3 86 class RefCountNTSImplCore
nuclear@3 87 {
nuclear@3 88 protected:
nuclear@3 89 mutable int RefCount;
nuclear@3 90
nuclear@3 91 public:
nuclear@3 92 // RefCountImpl constructor always initializes RefCount to 1 by default.
nuclear@3 93 OVR_FORCE_INLINE RefCountNTSImplCore() : RefCount(1) { }
nuclear@3 94
nuclear@3 95 // Need virtual destructor
nuclear@3 96 // This: 1. Makes sure the right destructor's called.
nuclear@3 97 // 2. Makes us have VTable, necessary if we are going to have format needed by InitNewMem()
nuclear@3 98 virtual ~RefCountNTSImplCore();
nuclear@3 99
nuclear@3 100 // Debug method only.
nuclear@3 101 int GetRefCount() const { return RefCount; }
nuclear@3 102
nuclear@3 103 // This logic is used to detect invalid 'delete' calls of reference counted
nuclear@3 104 // objects. Direct delete calls are not allowed on them unless they come in
nuclear@3 105 // internally from Release.
nuclear@3 106 #ifdef OVR_BUILD_DEBUG
nuclear@3 107 static void OVR_CDECL reportInvalidDelete(void *pmem);
nuclear@3 108 OVR_FORCE_INLINE static void checkInvalidDelete(RefCountNTSImplCore *pmem)
nuclear@3 109 {
nuclear@3 110 if (pmem->RefCount != 0)
nuclear@3 111 reportInvalidDelete(pmem);
nuclear@3 112 }
nuclear@3 113 #else
nuclear@3 114 OVR_FORCE_INLINE static void checkInvalidDelete(RefCountNTSImplCore *) { }
nuclear@3 115 #endif
nuclear@3 116
nuclear@3 117 // Base class ref-count content should not be copied.
nuclear@3 118 void operator = (const RefCountNTSImplCore &) { }
nuclear@3 119 };
nuclear@3 120
nuclear@3 121
nuclear@3 122
nuclear@3 123 // RefCountImpl provides Thread-Safe implementation of reference counting, so
nuclear@3 124 // it should be used by default in most places.
nuclear@3 125
nuclear@3 126 class RefCountImpl : public RefCountImplCore
nuclear@3 127 {
nuclear@3 128 public:
nuclear@3 129 // Thread-Safe Ref-Count Implementation.
nuclear@3 130 void AddRef();
nuclear@3 131 void Release();
nuclear@3 132 };
nuclear@3 133
nuclear@3 134 // RefCountVImpl provides Thread-Safe implementation of reference counting, plus,
nuclear@3 135 // virtual AddRef and Release.
nuclear@3 136
nuclear@3 137 class RefCountVImpl : public RefCountImplCore
nuclear@3 138 {
nuclear@3 139 public:
nuclear@3 140 // Thread-Safe Ref-Count Implementation.
nuclear@3 141 virtual void AddRef();
nuclear@3 142 virtual void Release();
nuclear@3 143 };
nuclear@3 144
nuclear@3 145
nuclear@3 146 // RefCountImplNTS provides Non-Thread-Safe implementation of reference counting,
nuclear@3 147 // which is slightly more efficient since it doesn't use atomics.
nuclear@3 148
nuclear@3 149 class RefCountNTSImpl : public RefCountNTSImplCore
nuclear@3 150 {
nuclear@3 151 public:
nuclear@3 152 OVR_FORCE_INLINE void AddRef() const { RefCount++; }
nuclear@3 153 void Release() const;
nuclear@3 154 };
nuclear@3 155
nuclear@3 156
nuclear@3 157
nuclear@3 158 // RefCountBaseStatImpl<> is a common class that adds new/delete override with Stat tracking
nuclear@3 159 // to the reference counting implementation. Base must be one of the RefCountImpl classes.
nuclear@3 160
nuclear@3 161 template<class Base>
nuclear@3 162 class RefCountBaseStatImpl : public Base
nuclear@3 163 {
nuclear@3 164 public:
nuclear@3 165 RefCountBaseStatImpl() { }
nuclear@3 166
nuclear@3 167 // *** Override New and Delete
nuclear@3 168
nuclear@3 169 // DOM-IGNORE-BEGIN
nuclear@3 170 // Undef new temporarily if it is being redefined
nuclear@3 171 #ifdef OVR_DEFINE_NEW
nuclear@3 172 #undef new
nuclear@3 173 #endif
nuclear@3 174
nuclear@3 175 #ifdef OVR_BUILD_DEBUG
nuclear@3 176 // Custom check used to detect incorrect calls of 'delete' on ref-counted objects.
nuclear@3 177 #define OVR_REFCOUNTALLOC_CHECK_DELETE(class_name, p) \
nuclear@3 178 do {if (p) Base::checkInvalidDelete((class_name*)p); } while(0)
nuclear@3 179 #else
nuclear@3 180 #define OVR_REFCOUNTALLOC_CHECK_DELETE(class_name, p)
nuclear@3 181 #endif
nuclear@3 182
nuclear@3 183 // Redefine all new & delete operators.
nuclear@3 184 OVR_MEMORY_REDEFINE_NEW_IMPL(Base, OVR_REFCOUNTALLOC_CHECK_DELETE)
nuclear@3 185
nuclear@3 186 #ifdef OVR_DEFINE_NEW
nuclear@3 187 #define new OVR_DEFINE_NEW
nuclear@3 188 #endif
nuclear@3 189 // OVR_BUILD_DEFINE_NEW
nuclear@3 190 // DOM-IGNORE-END
nuclear@3 191 };
nuclear@3 192
nuclear@3 193
nuclear@3 194
nuclear@3 195 //-----------------------------------------------------------------------------------
nuclear@3 196 // *** End user RefCountBase<> classes
nuclear@3 197
nuclear@3 198
nuclear@3 199 // RefCountBase is a base class for classes that require thread-safe reference
nuclear@3 200 // counting; it also overrides the new and delete operators to use MemoryHeap.
nuclear@3 201 //
nuclear@3 202 // Reference counted objects start out with RefCount value of 1. Further lifetime
nuclear@3 203 // management is done through the AddRef() and Release() methods, typically
nuclear@3 204 // hidden by Ptr<>.
nuclear@3 205
nuclear@3 206 template<class C>
nuclear@3 207 class RefCountBase : public RefCountBaseStatImpl<RefCountImpl>
nuclear@3 208 {
nuclear@3 209 public:
nuclear@3 210 // Constructor.
nuclear@3 211 OVR_FORCE_INLINE RefCountBase() : RefCountBaseStatImpl<RefCountImpl>() { }
nuclear@3 212 };
nuclear@3 213
nuclear@3 214 // RefCountBaseV is the same as RefCountBase but with virtual AddRef/Release
nuclear@3 215
nuclear@3 216 template<class C>
nuclear@3 217 class RefCountBaseV : public RefCountBaseStatImpl<RefCountVImpl>
nuclear@3 218 {
nuclear@3 219 public:
nuclear@3 220 // Constructor.
nuclear@3 221 OVR_FORCE_INLINE RefCountBaseV() : RefCountBaseStatImpl<RefCountVImpl>() { }
nuclear@3 222 };
nuclear@3 223
nuclear@3 224
nuclear@3 225 // RefCountBaseNTS is a base class for classes that require Non-Thread-Safe reference
nuclear@3 226 // counting; it also overrides the new and delete operators to use MemoryHeap.
nuclear@3 227 // This class should only be used if all pointers to it are known to be assigned,
nuclear@3 228 // destroyed and manipulated within one thread.
nuclear@3 229 //
nuclear@3 230 // Reference counted objects start out with RefCount value of 1. Further lifetime
nuclear@3 231 // management is done through the AddRef() and Release() methods, typically
nuclear@3 232 // hidden by Ptr<>.
nuclear@3 233
nuclear@3 234 template<class C>
nuclear@3 235 class RefCountBaseNTS : public RefCountBaseStatImpl<RefCountNTSImpl>
nuclear@3 236 {
nuclear@3 237 public:
nuclear@3 238 // Constructor.
nuclear@3 239 OVR_FORCE_INLINE RefCountBaseNTS() : RefCountBaseStatImpl<RefCountNTSImpl>() { }
nuclear@3 240 };
nuclear@3 241
nuclear@3 242 //-----------------------------------------------------------------------------------
nuclear@3 243 // ***** Pickable template pointer
nuclear@3 244 enum PickType { PickValue };
nuclear@3 245
nuclear@3 246 template <typename T>
nuclear@3 247 class Pickable
nuclear@3 248 {
nuclear@3 249 public:
nuclear@3 250 Pickable() : pV(NULL) {}
nuclear@3 251 explicit Pickable(T* p) : pV(p) {}
nuclear@3 252 Pickable(T* p, PickType) : pV(p)
nuclear@3 253 {
nuclear@3 254 OVR_ASSERT(pV);
nuclear@3 255 if (pV)
nuclear@3 256 pV->AddRef();
nuclear@3 257 }
nuclear@3 258 template <typename OT>
nuclear@3 259 Pickable(const Pickable<OT>& other) : pV(other.GetPtr()) {}
nuclear@3 260
nuclear@3 261 public:
nuclear@3 262 Pickable& operator =(const Pickable& other)
nuclear@3 263 {
nuclear@3 264 OVR_ASSERT(pV == NULL);
nuclear@3 265 pV = other.pV;
nuclear@3 266 // Extra check.
nuclear@3 267 //other.pV = NULL;
nuclear@3 268 return *this;
nuclear@3 269 }
nuclear@3 270
nuclear@3 271 public:
nuclear@3 272 T* GetPtr() const { return pV; }
nuclear@3 273 T* operator->() const
nuclear@3 274 {
nuclear@3 275 return pV;
nuclear@3 276 }
nuclear@3 277 T& operator*() const
nuclear@3 278 {
nuclear@3 279 OVR_ASSERT(pV);
nuclear@3 280 return *pV;
nuclear@3 281 }
nuclear@3 282
nuclear@3 283 private:
nuclear@3 284 T* pV;
nuclear@3 285 };
nuclear@3 286
nuclear@3 287 template <typename T>
nuclear@3 288 OVR_FORCE_INLINE
nuclear@3 289 Pickable<T> MakePickable(T* p)
nuclear@3 290 {
nuclear@3 291 return Pickable<T>(p);
nuclear@3 292 }
nuclear@3 293
nuclear@3 294 //-----------------------------------------------------------------------------------
nuclear@3 295 // ***** Ref-Counted template pointer
nuclear@3 296
nuclear@3 297 // Automatically AddRefs and Releases interfaces
nuclear@3 298
nuclear@3 299 void* ReturnArg0(void* p);
nuclear@3 300
nuclear@3 301 template<class C>
nuclear@3 302 class Ptr
nuclear@3 303 {
nuclear@3 304 #ifdef OVR_CC_ARM
nuclear@3 305 static C* ReturnArg(void* p) { return (C*)ReturnArg0(p); }
nuclear@3 306 #endif
nuclear@3 307
nuclear@3 308 protected:
nuclear@3 309 C *pObject;
nuclear@3 310
nuclear@3 311 public:
nuclear@3 312
nuclear@3 313 // Constructors
nuclear@3 314 OVR_FORCE_INLINE Ptr() : pObject(0)
nuclear@3 315 { }
nuclear@3 316 #ifdef OVR_CC_ARM
nuclear@3 317 OVR_FORCE_INLINE Ptr(C &robj) : pObject(ReturnArg(&robj))
nuclear@3 318 #else
nuclear@3 319 OVR_FORCE_INLINE Ptr(C &robj) : pObject(&robj)
nuclear@3 320 #endif
nuclear@3 321 { }
nuclear@3 322 OVR_FORCE_INLINE Ptr(Pickable<C> v) : pObject(v.GetPtr())
nuclear@3 323 {
nuclear@3 324 // No AddRef() on purpose.
nuclear@3 325 }
nuclear@3 326 OVR_FORCE_INLINE Ptr(Ptr<C>& other, PickType) : pObject(other.pObject)
nuclear@3 327 {
nuclear@3 328 other.pObject = NULL;
nuclear@3 329 // No AddRef() on purpose.
nuclear@3 330 }
nuclear@3 331 OVR_FORCE_INLINE Ptr(C *pobj)
nuclear@3 332 {
nuclear@3 333 if (pobj) pobj->AddRef();
nuclear@3 334 pObject = pobj;
nuclear@3 335 }
nuclear@3 336 OVR_FORCE_INLINE Ptr(const Ptr<C> &src)
nuclear@3 337 {
nuclear@3 338 if (src.pObject) src.pObject->AddRef();
nuclear@3 339 pObject = src.pObject;
nuclear@3 340 }
nuclear@3 341
nuclear@3 342 template<class R>
nuclear@3 343 OVR_FORCE_INLINE Ptr(Ptr<R> &src)
nuclear@3 344 {
nuclear@3 345 if (src) src->AddRef();
nuclear@3 346 pObject = src;
nuclear@3 347 }
nuclear@3 348 template<class R>
nuclear@3 349 OVR_FORCE_INLINE Ptr(Pickable<R> v) : pObject(v.GetPtr())
nuclear@3 350 {
nuclear@3 351 // No AddRef() on purpose.
nuclear@3 352 }
nuclear@3 353
nuclear@3 354 // Destructor
nuclear@3 355 OVR_FORCE_INLINE ~Ptr()
nuclear@3 356 {
nuclear@3 357 if (pObject) pObject->Release();
nuclear@3 358 }
nuclear@3 359
nuclear@3 360 // Compares
nuclear@3 361 OVR_FORCE_INLINE bool operator == (const Ptr &other) const { return pObject == other.pObject; }
nuclear@3 362 OVR_FORCE_INLINE bool operator != (const Ptr &other) const { return pObject != other.pObject; }
nuclear@3 363
nuclear@3 364 OVR_FORCE_INLINE bool operator == (C *pother) const { return pObject == pother; }
nuclear@3 365 OVR_FORCE_INLINE bool operator != (C *pother) const { return pObject != pother; }
nuclear@3 366
nuclear@3 367
nuclear@3 368 OVR_FORCE_INLINE bool operator < (const Ptr &other) const { return pObject < other.pObject; }
nuclear@3 369
nuclear@3 370 // Assignment
nuclear@3 371 template<class R>
nuclear@3 372 OVR_FORCE_INLINE const Ptr<C>& operator = (const Ptr<R> &src)
nuclear@3 373 {
nuclear@3 374 if (src) src->AddRef();
nuclear@3 375 if (pObject) pObject->Release();
nuclear@3 376 pObject = src;
nuclear@3 377 return *this;
nuclear@3 378 }
nuclear@3 379 // Specialization
nuclear@3 380 OVR_FORCE_INLINE const Ptr<C>& operator = (const Ptr<C> &src)
nuclear@3 381 {
nuclear@3 382 if (src) src->AddRef();
nuclear@3 383 if (pObject) pObject->Release();
nuclear@3 384 pObject = src;
nuclear@3 385 return *this;
nuclear@3 386 }
nuclear@3 387
nuclear@3 388 OVR_FORCE_INLINE const Ptr<C>& operator = (C *psrc)
nuclear@3 389 {
nuclear@3 390 if (psrc) psrc->AddRef();
nuclear@3 391 if (pObject) pObject->Release();
nuclear@3 392 pObject = psrc;
nuclear@3 393 return *this;
nuclear@3 394 }
nuclear@3 395 OVR_FORCE_INLINE const Ptr<C>& operator = (C &src)
nuclear@3 396 {
nuclear@3 397 if (pObject) pObject->Release();
nuclear@3 398 pObject = &src;
nuclear@3 399 return *this;
nuclear@3 400 }
nuclear@3 401 OVR_FORCE_INLINE Ptr<C>& operator = (Pickable<C> src)
nuclear@3 402 {
nuclear@3 403 return Pick(src);
nuclear@3 404 }
nuclear@3 405 template<class R>
nuclear@3 406 OVR_FORCE_INLINE Ptr<C>& operator = (Pickable<R> src)
nuclear@3 407 {
nuclear@3 408 return Pick(src);
nuclear@3 409 }
nuclear@3 410
nuclear@3 411 // Set Assignment
nuclear@3 412 template<class R>
nuclear@3 413 OVR_FORCE_INLINE Ptr<C>& SetPtr(const Ptr<R> &src)
nuclear@3 414 {
nuclear@3 415 if (src) src->AddRef();
nuclear@3 416 if (pObject) pObject->Release();
nuclear@3 417 pObject = src;
nuclear@3 418 return *this;
nuclear@3 419 }
nuclear@3 420 // Specialization
nuclear@3 421 OVR_FORCE_INLINE Ptr<C>& SetPtr(const Ptr<C> &src)
nuclear@3 422 {
nuclear@3 423 if (src) src->AddRef();
nuclear@3 424 if (pObject) pObject->Release();
nuclear@3 425 pObject = src;
nuclear@3 426 return *this;
nuclear@3 427 }
nuclear@3 428
nuclear@3 429 OVR_FORCE_INLINE Ptr<C>& SetPtr(C *psrc)
nuclear@3 430 {
nuclear@3 431 if (psrc) psrc->AddRef();
nuclear@3 432 if (pObject) pObject->Release();
nuclear@3 433 pObject = psrc;
nuclear@3 434 return *this;
nuclear@3 435 }
nuclear@3 436 OVR_FORCE_INLINE Ptr<C>& SetPtr(C &src)
nuclear@3 437 {
nuclear@3 438 if (pObject) pObject->Release();
nuclear@3 439 pObject = &src;
nuclear@3 440 return *this;
nuclear@3 441 }
nuclear@3 442 OVR_FORCE_INLINE Ptr<C>& SetPtr(Pickable<C> src)
nuclear@3 443 {
nuclear@3 444 return Pick(src);
nuclear@3 445 }
nuclear@3 446
nuclear@3 447 // Nulls ref-counted pointer without decrement
nuclear@3 448 OVR_FORCE_INLINE void NullWithoutRelease()
nuclear@3 449 {
nuclear@3 450 pObject = 0;
nuclear@3 451 }
nuclear@3 452
nuclear@3 453 // Clears the pointer to the object
nuclear@3 454 OVR_FORCE_INLINE void Clear()
nuclear@3 455 {
nuclear@3 456 if (pObject) pObject->Release();
nuclear@3 457 pObject = 0;
nuclear@3 458 }
nuclear@3 459
nuclear@3 460 // Obtain pointer reference directly, for D3D interfaces
nuclear@3 461 OVR_FORCE_INLINE C*& GetRawRef() { return pObject; }
nuclear@3 462
nuclear@3 463 // Access Operators
nuclear@3 464 OVR_FORCE_INLINE C* GetPtr() const { return pObject; }
nuclear@3 465 OVR_FORCE_INLINE C& operator * () const { return *pObject; }
nuclear@3 466 OVR_FORCE_INLINE C* operator -> () const { return pObject; }
nuclear@3 467 // Conversion
nuclear@3 468 OVR_FORCE_INLINE operator C* () const { return pObject; }
nuclear@3 469
nuclear@3 470 // Pickers.
nuclear@3 471
nuclear@3 472 // Pick a value.
nuclear@3 473 OVR_FORCE_INLINE Ptr<C>& Pick(Ptr<C>& other)
nuclear@3 474 {
nuclear@3 475 if (&other != this)
nuclear@3 476 {
nuclear@3 477 if (pObject) pObject->Release();
nuclear@3 478 pObject = other.pObject;
nuclear@3 479 other.pObject = 0;
nuclear@3 480 }
nuclear@3 481
nuclear@3 482 return *this;
nuclear@3 483 }
nuclear@3 484
nuclear@3 485 OVR_FORCE_INLINE Ptr<C>& Pick(Pickable<C> v)
nuclear@3 486 {
nuclear@3 487 if (v.GetPtr() != pObject)
nuclear@3 488 {
nuclear@3 489 if (pObject) pObject->Release();
nuclear@3 490 pObject = v.GetPtr();
nuclear@3 491 }
nuclear@3 492
nuclear@3 493 return *this;
nuclear@3 494 }
nuclear@3 495
nuclear@3 496 template<class R>
nuclear@3 497 OVR_FORCE_INLINE Ptr<C>& Pick(Pickable<R> v)
nuclear@3 498 {
nuclear@3 499 if (v.GetPtr() != pObject)
nuclear@3 500 {
nuclear@3 501 if (pObject) pObject->Release();
nuclear@3 502 pObject = v.GetPtr();
nuclear@3 503 }
nuclear@3 504
nuclear@3 505 return *this;
nuclear@3 506 }
nuclear@3 507
nuclear@3 508 OVR_FORCE_INLINE Ptr<C>& Pick(C* p)
nuclear@3 509 {
nuclear@3 510 if (p != pObject)
nuclear@3 511 {
nuclear@3 512 if (pObject) pObject->Release();
nuclear@3 513 pObject = p;
nuclear@3 514 }
nuclear@3 515
nuclear@3 516 return *this;
nuclear@3 517 }
nuclear@3 518 };
nuclear@3 519
nuclear@3 520 } // OVR
nuclear@3 521
nuclear@3 522 #endif