oculus1

annotate libovr/Src/Kernel/OVR_RefCount.h @ 2:59fc487ba58e

find changesets by author, revision, files, or words in the commit message
foo
author John Tsiombikas <nuclear@member.fsf.org>
date Sat, 14 Sep 2013 17:51:03 +0300
parents
children b069a5c27388
rev   line source
nuclear@1 1 /************************************************************************************
nuclear@1 2
nuclear@1 3 PublicHeader: Kernel
nuclear@1 4 Filename : OVR_RefCount.h
nuclear@1 5 Content : Reference counting implementation headers
nuclear@1 6 Created : September 19, 2012
nuclear@1 7 Notes :
nuclear@1 8
nuclear@1 9 Copyright : Copyright 2012 Oculus VR, Inc. All Rights reserved.
nuclear@1 10
nuclear@1 11 Use of this software is subject to the terms of the Oculus license
nuclear@1 12 agreement provided at the time of installation or download, or which
nuclear@1 13 otherwise accompanies this software in either electronic or hard copy form.
nuclear@1 14
nuclear@1 15 ************************************************************************************/
nuclear@1 16
nuclear@1 17 #ifndef OVR_RefCount_h
nuclear@1 18 #define OVR_RefCount_h
nuclear@1 19
nuclear@1 20 #include "OVR_Types.h"
nuclear@1 21 #include "OVR_Allocator.h"
nuclear@1 22
nuclear@1 23 namespace OVR {
nuclear@1 24
nuclear@1 25 //-----------------------------------------------------------------------------------
nuclear@1 26 // ***** Reference Counting
nuclear@1 27
nuclear@1 28 // There are three types of reference counting base classes:
nuclear@1 29 //
nuclear@1 30 // RefCountBase - Provides thread-safe reference counting (Default).
nuclear@1 31 // RefCountBaseNTS - Non Thread Safe version of reference counting.
nuclear@1 32
nuclear@1 33
nuclear@1 34 // ***** Declared classes
nuclear@1 35
nuclear@1 36 template<class C>
nuclear@1 37 class RefCountBase;
nuclear@1 38 template<class C>
nuclear@1 39 class RefCountBaseNTS;
nuclear@1 40
nuclear@1 41 class RefCountImpl;
nuclear@1 42 class RefCountNTSImpl;
nuclear@1 43
nuclear@1 44
nuclear@1 45 //-----------------------------------------------------------------------------------
nuclear@1 46 // ***** Implementation For Reference Counting
nuclear@1 47
nuclear@1 48 // RefCountImplCore holds RefCount value and defines a few utility
nuclear@1 49 // functions shared by all implementations.
nuclear@1 50
nuclear@1 51 class RefCountImplCore
nuclear@1 52 {
nuclear@1 53 protected:
nuclear@1 54 volatile int RefCount;
nuclear@1 55
nuclear@1 56 public:
nuclear@1 57 // RefCountImpl constructor always initializes RefCount to 1 by default.
nuclear@1 58 OVR_FORCE_INLINE RefCountImplCore() : RefCount(1) { }
nuclear@1 59
nuclear@1 60 // Need virtual destructor
nuclear@1 61 // This: 1. Makes sure the right destructor's called.
nuclear@1 62 // 2. Makes us have VTable, necessary if we are going to have format needed by InitNewMem()
nuclear@1 63 virtual ~RefCountImplCore();
nuclear@1 64
nuclear@1 65 // Debug method only.
nuclear@1 66 int GetRefCount() const { return RefCount; }
nuclear@1 67
nuclear@1 68 // This logic is used to detect invalid 'delete' calls of reference counted
nuclear@1 69 // objects. Direct delete calls are not allowed on them unless they come in
nuclear@1 70 // internally from Release.
nuclear@1 71 #ifdef OVR_BUILD_DEBUG
nuclear@1 72 static void OVR_CDECL reportInvalidDelete(void *pmem);
nuclear@1 73 inline static void checkInvalidDelete(RefCountImplCore *pmem)
nuclear@1 74 {
nuclear@1 75 if (pmem->RefCount != 0)
nuclear@1 76 reportInvalidDelete(pmem);
nuclear@1 77 }
nuclear@1 78 #else
nuclear@1 79 inline static void checkInvalidDelete(RefCountImplCore *) { }
nuclear@1 80 #endif
nuclear@1 81
nuclear@1 82 // Base class ref-count content should not be copied.
nuclear@1 83 void operator = (const RefCountImplCore &) { }
nuclear@1 84 };
nuclear@1 85
nuclear@1 86 class RefCountNTSImplCore
nuclear@1 87 {
nuclear@1 88 protected:
nuclear@1 89 mutable int RefCount;
nuclear@1 90
nuclear@1 91 public:
nuclear@1 92 // RefCountImpl constructor always initializes RefCount to 1 by default.
nuclear@1 93 OVR_FORCE_INLINE RefCountNTSImplCore() : RefCount(1) { }
nuclear@1 94
nuclear@1 95 // Need virtual destructor
nuclear@1 96 // This: 1. Makes sure the right destructor's called.
nuclear@1 97 // 2. Makes us have VTable, necessary if we are going to have format needed by InitNewMem()
nuclear@1 98 virtual ~RefCountNTSImplCore();
nuclear@1 99
nuclear@1 100 // Debug method only.
nuclear@1 101 int GetRefCount() const { return RefCount; }
nuclear@1 102
nuclear@1 103 // This logic is used to detect invalid 'delete' calls of reference counted
nuclear@1 104 // objects. Direct delete calls are not allowed on them unless they come in
nuclear@1 105 // internally from Release.
nuclear@1 106 #ifdef OVR_BUILD_DEBUG
nuclear@1 107 static void OVR_CDECL reportInvalidDelete(void *pmem);
nuclear@1 108 OVR_FORCE_INLINE static void checkInvalidDelete(RefCountNTSImplCore *pmem)
nuclear@1 109 {
nuclear@1 110 if (pmem->RefCount != 0)
nuclear@1 111 reportInvalidDelete(pmem);
nuclear@1 112 }
nuclear@1 113 #else
nuclear@1 114 OVR_FORCE_INLINE static void checkInvalidDelete(RefCountNTSImplCore *) { }
nuclear@1 115 #endif
nuclear@1 116
nuclear@1 117 // Base class ref-count content should not be copied.
nuclear@1 118 void operator = (const RefCountNTSImplCore &) { }
nuclear@1 119 };
nuclear@1 120
nuclear@1 121
nuclear@1 122
nuclear@1 123 // RefCountImpl provides Thread-Safe implementation of reference counting, so
nuclear@1 124 // it should be used by default in most places.
nuclear@1 125
nuclear@1 126 class RefCountImpl : public RefCountImplCore
nuclear@1 127 {
nuclear@1 128 public:
nuclear@1 129 // Thread-Safe Ref-Count Implementation.
nuclear@1 130 void AddRef();
nuclear@1 131 void Release();
nuclear@1 132 };
nuclear@1 133
nuclear@1 134 // RefCountVImpl provides Thread-Safe implementation of reference counting, plus,
nuclear@1 135 // virtual AddRef and Release.
nuclear@1 136
nuclear@1 137 class RefCountVImpl : public RefCountImplCore
nuclear@1 138 {
nuclear@1 139 public:
nuclear@1 140 // Thread-Safe Ref-Count Implementation.
nuclear@1 141 virtual void AddRef();
nuclear@1 142 virtual void Release();
nuclear@1 143 };
nuclear@1 144
nuclear@1 145
nuclear@1 146 // RefCountImplNTS provides Non-Thread-Safe implementation of reference counting,
nuclear@1 147 // which is slightly more efficient since it doesn't use atomics.
nuclear@1 148
nuclear@1 149 class RefCountNTSImpl : public RefCountNTSImplCore
nuclear@1 150 {
nuclear@1 151 public:
nuclear@1 152 OVR_FORCE_INLINE void AddRef() const { RefCount++; }
nuclear@1 153 void Release() const;
nuclear@1 154 };
nuclear@1 155
nuclear@1 156
nuclear@1 157
nuclear@1 158 // RefCountBaseStatImpl<> is a common class that adds new/delete override with Stat tracking
nuclear@1 159 // to the reference counting implementation. Base must be one of the RefCountImpl classes.
nuclear@1 160
nuclear@1 161 template<class Base>
nuclear@1 162 class RefCountBaseStatImpl : public Base
nuclear@1 163 {
nuclear@1 164 public:
nuclear@1 165 RefCountBaseStatImpl() { }
nuclear@1 166
nuclear@1 167 // *** Override New and Delete
nuclear@1 168
nuclear@1 169 // DOM-IGNORE-BEGIN
nuclear@1 170 // Undef new temporarily if it is being redefined
nuclear@1 171 #ifdef OVR_DEFINE_NEW
nuclear@1 172 #undef new
nuclear@1 173 #endif
nuclear@1 174
nuclear@1 175 #ifdef OVR_BUILD_DEBUG
nuclear@1 176 // Custom check used to detect incorrect calls of 'delete' on ref-counted objects.
nuclear@1 177 #define OVR_REFCOUNTALLOC_CHECK_DELETE(class_name, p) \
nuclear@1 178 do {if (p) Base::checkInvalidDelete((class_name*)p); } while(0)
nuclear@1 179 #else
nuclear@1 180 #define OVR_REFCOUNTALLOC_CHECK_DELETE(class_name, p)
nuclear@1 181 #endif
nuclear@1 182
nuclear@1 183 // Redefine all new & delete operators.
nuclear@1 184 OVR_MEMORY_REDEFINE_NEW_IMPL(Base, OVR_REFCOUNTALLOC_CHECK_DELETE)
nuclear@1 185
nuclear@1 186 #ifdef OVR_DEFINE_NEW
nuclear@1 187 #define new OVR_DEFINE_NEW
nuclear@1 188 #endif
nuclear@1 189 // OVR_BUILD_DEFINE_NEW
nuclear@1 190 // DOM-IGNORE-END
nuclear@1 191 };
nuclear@1 192
nuclear@1 193
nuclear@1 194
nuclear@1 195 //-----------------------------------------------------------------------------------
nuclear@1 196 // *** End user RefCountBase<> classes
nuclear@1 197
nuclear@1 198
nuclear@1 199 // RefCountBase is a base class for classes that require thread-safe reference
nuclear@1 200 // counting; it also overrides the new and delete operators to use MemoryHeap.
nuclear@1 201 //
nuclear@1 202 // Reference counted objects start out with RefCount value of 1. Further lifetime
nuclear@1 203 // management is done through the AddRef() and Release() methods, typically
nuclear@1 204 // hidden by Ptr<>.
nuclear@1 205
nuclear@1 206 template<class C>
nuclear@1 207 class RefCountBase : public RefCountBaseStatImpl<RefCountImpl>
nuclear@1 208 {
nuclear@1 209 public:
nuclear@1 210 // Constructor.
nuclear@1 211 OVR_FORCE_INLINE RefCountBase() : RefCountBaseStatImpl<RefCountImpl>() { }
nuclear@1 212 };
nuclear@1 213
nuclear@1 214 // RefCountBaseV is the same as RefCountBase but with virtual AddRef/Release
nuclear@1 215
nuclear@1 216 template<class C>
nuclear@1 217 class RefCountBaseV : public RefCountBaseStatImpl<RefCountVImpl>
nuclear@1 218 {
nuclear@1 219 public:
nuclear@1 220 // Constructor.
nuclear@1 221 OVR_FORCE_INLINE RefCountBaseV() : RefCountBaseStatImpl<RefCountVImpl>() { }
nuclear@1 222 };
nuclear@1 223
nuclear@1 224
nuclear@1 225 // RefCountBaseNTS is a base class for classes that require Non-Thread-Safe reference
nuclear@1 226 // counting; it also overrides the new and delete operators to use MemoryHeap.
nuclear@1 227 // This class should only be used if all pointers to it are known to be assigned,
nuclear@1 228 // destroyed and manipulated within one thread.
nuclear@1 229 //
nuclear@1 230 // Reference counted objects start out with RefCount value of 1. Further lifetime
nuclear@1 231 // management is done through the AddRef() and Release() methods, typically
nuclear@1 232 // hidden by Ptr<>.
nuclear@1 233
nuclear@1 234 template<class C>
nuclear@1 235 class RefCountBaseNTS : public RefCountBaseStatImpl<RefCountNTSImpl>
nuclear@1 236 {
nuclear@1 237 public:
nuclear@1 238 // Constructor.
nuclear@1 239 OVR_FORCE_INLINE RefCountBaseNTS() : RefCountBaseStatImpl<RefCountNTSImpl>() { }
nuclear@1 240 };
nuclear@1 241
nuclear@1 242 //-----------------------------------------------------------------------------------
nuclear@1 243 // ***** Pickable template pointer
nuclear@1 244 enum PickType { PickValue };
nuclear@1 245
nuclear@1 246 template <typename T>
nuclear@1 247 class Pickable
nuclear@1 248 {
nuclear@1 249 public:
nuclear@1 250 Pickable() : pV(NULL) {}
nuclear@1 251 explicit Pickable(T* p) : pV(p) {}
nuclear@1 252 Pickable(T* p, PickType) : pV(p)
nuclear@1 253 {
nuclear@1 254 OVR_ASSERT(pV);
nuclear@1 255 if (pV)
nuclear@1 256 pV->AddRef();
nuclear@1 257 }
nuclear@1 258 template <typename OT>
nuclear@1 259 Pickable(const Pickable<OT>& other) : pV(other.GetPtr()) {}
nuclear@1 260
nuclear@1 261 public:
nuclear@1 262 Pickable& operator =(const Pickable& other)
nuclear@1 263 {
nuclear@1 264 OVR_ASSERT(pV == NULL);
nuclear@1 265 pV = other.pV;
nuclear@1 266 // Extra check.
nuclear@1 267 //other.pV = NULL;
nuclear@1 268 return *this;
nuclear@1 269 }
nuclear@1 270
nuclear@1 271 public:
nuclear@1 272 T* GetPtr() const { return pV; }
nuclear@1 273 T* operator->() const
nuclear@1 274 {
nuclear@1 275 return pV;
nuclear@1 276 }
nuclear@1 277 T& operator*() const
nuclear@1 278 {
nuclear@1 279 OVR_ASSERT(pV);
nuclear@1 280 return *pV;
nuclear@1 281 }
nuclear@1 282
nuclear@1 283 private:
nuclear@1 284 T* pV;
nuclear@1 285 };
nuclear@1 286
nuclear@1 287 template <typename T>
nuclear@1 288 OVR_FORCE_INLINE
nuclear@1 289 Pickable<T> MakePickable(T* p)
nuclear@1 290 {
nuclear@1 291 return Pickable<T>(p);
nuclear@1 292 }
nuclear@1 293
nuclear@1 294 //-----------------------------------------------------------------------------------
nuclear@1 295 // ***** Ref-Counted template pointer
nuclear@1 296
nuclear@1 297 // Automatically AddRefs and Releases interfaces
nuclear@1 298
nuclear@1 299 void* ReturnArg0(void* p);
nuclear@1 300
nuclear@1 301 template<class C>
nuclear@1 302 class Ptr
nuclear@1 303 {
nuclear@1 304 #ifdef OVR_CC_ARM
nuclear@1 305 static C* ReturnArg(void* p) { return (C*)ReturnArg0(p); }
nuclear@1 306 #endif
nuclear@1 307
nuclear@1 308 protected:
nuclear@1 309 C *pObject;
nuclear@1 310
nuclear@1 311 public:
nuclear@1 312
nuclear@1 313 // Constructors
nuclear@1 314 OVR_FORCE_INLINE Ptr() : pObject(0)
nuclear@1 315 { }
nuclear@1 316 #ifdef OVR_CC_ARM
nuclear@1 317 OVR_FORCE_INLINE Ptr(C &robj) : pObject(ReturnArg(&robj))
nuclear@1 318 #else
nuclear@1 319 OVR_FORCE_INLINE Ptr(C &robj) : pObject(&robj)
nuclear@1 320 #endif
nuclear@1 321 { }
nuclear@1 322 OVR_FORCE_INLINE Ptr(Pickable<C> v) : pObject(v.GetPtr())
nuclear@1 323 {
nuclear@1 324 // No AddRef() on purpose.
nuclear@1 325 }
nuclear@1 326 OVR_FORCE_INLINE Ptr(Ptr<C>& other, PickType) : pObject(other.pObject)
nuclear@1 327 {
nuclear@1 328 other.pObject = NULL;
nuclear@1 329 // No AddRef() on purpose.
nuclear@1 330 }
nuclear@1 331 OVR_FORCE_INLINE Ptr(C *pobj)
nuclear@1 332 {
nuclear@1 333 if (pobj) pobj->AddRef();
nuclear@1 334 pObject = pobj;
nuclear@1 335 }
nuclear@1 336 OVR_FORCE_INLINE Ptr(const Ptr<C> &src)
nuclear@1 337 {
nuclear@1 338 if (src.pObject) src.pObject->AddRef();
nuclear@1 339 pObject = src.pObject;
nuclear@1 340 }
nuclear@1 341
nuclear@1 342 template<class R>
nuclear@1 343 OVR_FORCE_INLINE Ptr(Ptr<R> &src)
nuclear@1 344 {
nuclear@1 345 if (src) src->AddRef();
nuclear@1 346 pObject = src;
nuclear@1 347 }
nuclear@1 348 template<class R>
nuclear@1 349 OVR_FORCE_INLINE Ptr(Pickable<R> v) : pObject(v.GetPtr())
nuclear@1 350 {
nuclear@1 351 // No AddRef() on purpose.
nuclear@1 352 }
nuclear@1 353
nuclear@1 354 // Destructor
nuclear@1 355 OVR_FORCE_INLINE ~Ptr()
nuclear@1 356 {
nuclear@1 357 if (pObject) pObject->Release();
nuclear@1 358 }
nuclear@1 359
nuclear@1 360 // Compares
nuclear@1 361 OVR_FORCE_INLINE bool operator == (const Ptr &other) const { return pObject == other.pObject; }
nuclear@1 362 OVR_FORCE_INLINE bool operator != (const Ptr &other) const { return pObject != other.pObject; }
nuclear@1 363
nuclear@1 364 OVR_FORCE_INLINE bool operator == (C *pother) const { return pObject == pother; }
nuclear@1 365 OVR_FORCE_INLINE bool operator != (C *pother) const { return pObject != pother; }
nuclear@1 366
nuclear@1 367
nuclear@1 368 OVR_FORCE_INLINE bool operator < (const Ptr &other) const { return pObject < other.pObject; }
nuclear@1 369
nuclear@1 370 // Assignment
nuclear@1 371 template<class R>
nuclear@1 372 OVR_FORCE_INLINE const Ptr<C>& operator = (const Ptr<R> &src)
nuclear@1 373 {
nuclear@1 374 if (src) src->AddRef();
nuclear@1 375 if (pObject) pObject->Release();
nuclear@1 376 pObject = src;
nuclear@1 377 return *this;
nuclear@1 378 }
nuclear@1 379 // Specialization
nuclear@1 380 OVR_FORCE_INLINE const Ptr<C>& operator = (const Ptr<C> &src)
nuclear@1 381 {
nuclear@1 382 if (src) src->AddRef();
nuclear@1 383 if (pObject) pObject->Release();
nuclear@1 384 pObject = src;
nuclear@1 385 return *this;
nuclear@1 386 }
nuclear@1 387
nuclear@1 388 OVR_FORCE_INLINE const Ptr<C>& operator = (C *psrc)
nuclear@1 389 {
nuclear@1 390 if (psrc) psrc->AddRef();
nuclear@1 391 if (pObject) pObject->Release();
nuclear@1 392 pObject = psrc;
nuclear@1 393 return *this;
nuclear@1 394 }
nuclear@1 395 OVR_FORCE_INLINE const Ptr<C>& operator = (C &src)
nuclear@1 396 {
nuclear@1 397 if (pObject) pObject->Release();
nuclear@1 398 pObject = &src;
nuclear@1 399 return *this;
nuclear@1 400 }
nuclear@1 401 OVR_FORCE_INLINE Ptr<C>& operator = (Pickable<C> src)
nuclear@1 402 {
nuclear@1 403 return Pick(src);
nuclear@1 404 }
nuclear@1 405 template<class R>
nuclear@1 406 OVR_FORCE_INLINE Ptr<C>& operator = (Pickable<R> src)
nuclear@1 407 {
nuclear@1 408 return Pick(src);
nuclear@1 409 }
nuclear@1 410
nuclear@1 411 // Set Assignment
nuclear@1 412 template<class R>
nuclear@1 413 OVR_FORCE_INLINE Ptr<C>& SetPtr(const Ptr<R> &src)
nuclear@1 414 {
nuclear@1 415 if (src) src->AddRef();
nuclear@1 416 if (pObject) pObject->Release();
nuclear@1 417 pObject = src;
nuclear@1 418 return *this;
nuclear@1 419 }
nuclear@1 420 // Specialization
nuclear@1 421 OVR_FORCE_INLINE Ptr<C>& SetPtr(const Ptr<C> &src)
nuclear@1 422 {
nuclear@1 423 if (src) src->AddRef();
nuclear@1 424 if (pObject) pObject->Release();
nuclear@1 425 pObject = src;
nuclear@1 426 return *this;
nuclear@1 427 }
nuclear@1 428
nuclear@1 429 OVR_FORCE_INLINE Ptr<C>& SetPtr(C *psrc)
nuclear@1 430 {
nuclear@1 431 if (psrc) psrc->AddRef();
nuclear@1 432 if (pObject) pObject->Release();
nuclear@1 433 pObject = psrc;
nuclear@1 434 return *this;
nuclear@1 435 }
nuclear@1 436 OVR_FORCE_INLINE Ptr<C>& SetPtr(C &src)
nuclear@1 437 {
nuclear@1 438 if (pObject) pObject->Release();
nuclear@1 439 pObject = &src;
nuclear@1 440 return *this;
nuclear@1 441 }
nuclear@1 442 OVR_FORCE_INLINE Ptr<C>& SetPtr(Pickable<C> src)
nuclear@1 443 {
nuclear@1 444 return Pick(src);
nuclear@1 445 }
nuclear@1 446
nuclear@1 447 // Nulls ref-counted pointer without decrement
nuclear@1 448 OVR_FORCE_INLINE void NullWithoutRelease()
nuclear@1 449 {
nuclear@1 450 pObject = 0;
nuclear@1 451 }
nuclear@1 452
nuclear@1 453 // Clears the pointer to the object
nuclear@1 454 OVR_FORCE_INLINE void Clear()
nuclear@1 455 {
nuclear@1 456 if (pObject) pObject->Release();
nuclear@1 457 pObject = 0;
nuclear@1 458 }
nuclear@1 459
nuclear@1 460 // Obtain pointer reference directly, for D3D interfaces
nuclear@1 461 OVR_FORCE_INLINE C*& GetRawRef() { return pObject; }
nuclear@1 462
nuclear@1 463 // Access Operators
nuclear@1 464 OVR_FORCE_INLINE C* GetPtr() const { return pObject; }
nuclear@1 465 OVR_FORCE_INLINE C& operator * () const { return *pObject; }
nuclear@1 466 OVR_FORCE_INLINE C* operator -> () const { return pObject; }
nuclear@1 467 // Conversion
nuclear@1 468 OVR_FORCE_INLINE operator C* () const { return pObject; }
nuclear@1 469
nuclear@1 470 // Pickers.
nuclear@1 471
nuclear@1 472 // Pick a value.
nuclear@1 473 OVR_FORCE_INLINE Ptr<C>& Pick(Ptr<C>& other)
nuclear@1 474 {
nuclear@1 475 if (&other != this)
nuclear@1 476 {
nuclear@1 477 if (pObject) pObject->Release();
nuclear@1 478 pObject = other.pObject;
nuclear@1 479 other.pObject = 0;
nuclear@1 480 }
nuclear@1 481
nuclear@1 482 return *this;
nuclear@1 483 }
nuclear@1 484
nuclear@1 485 OVR_FORCE_INLINE Ptr<C>& Pick(Pickable<C> v)
nuclear@1 486 {
nuclear@1 487 if (v.GetPtr() != pObject)
nuclear@1 488 {
nuclear@1 489 if (pObject) pObject->Release();
nuclear@1 490 pObject = v.GetPtr();
nuclear@1 491 }
nuclear@1 492
nuclear@1 493 return *this;
nuclear@1 494 }
nuclear@1 495
nuclear@1 496 template<class R>
nuclear@1 497 OVR_FORCE_INLINE Ptr<C>& Pick(Pickable<R> v)
nuclear@1 498 {
nuclear@1 499 if (v.GetPtr() != pObject)
nuclear@1 500 {
nuclear@1 501 if (pObject) pObject->Release();
nuclear@1 502 pObject = v.GetPtr();
nuclear@1 503 }
nuclear@1 504
nuclear@1 505 return *this;
nuclear@1 506 }
nuclear@1 507
nuclear@1 508 OVR_FORCE_INLINE Ptr<C>& Pick(C* p)
nuclear@1 509 {
nuclear@1 510 if (p != pObject)
nuclear@1 511 {
nuclear@1 512 if (pObject) pObject->Release();
nuclear@1 513 pObject = p;
nuclear@1 514 }
nuclear@1 515
nuclear@1 516 return *this;
nuclear@1 517 }
nuclear@1 518 };
nuclear@1 519
nuclear@1 520 } // OVR
nuclear@1 521
nuclear@1 522 #endif