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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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383 inline void Dispose(); | 383 inline void Dispose(); |
384 | 384 |
385 /** | 385 /** |
386 * Make the reference to this object weak. When only weak handles | 386 * Make the reference to this object weak. When only weak handles |
387 * refer to the object, the garbage collector will perform a | 387 * refer to the object, the garbage collector will perform a |
388 * callback to the given V8::WeakReferenceCallback function, passing | 388 * callback to the given V8::WeakReferenceCallback function, passing |
389 * it the object reference and the given parameters. | 389 * it the object reference and the given parameters. |
390 */ | 390 */ |
391 inline void MakeWeak(void* parameters, WeakReferenceCallback callback); | 391 inline void MakeWeak(void* parameters, WeakReferenceCallback callback); |
392 | 392 |
393 /** Clears the weak reference to this object.*/ | 393 /** Clears the weak reference to this object. */ |
394 inline void ClearWeak(); | 394 inline void ClearWeak(); |
395 | 395 |
396 /** | 396 /** |
397 * Marks the reference to this object independent. Garbage collector | 397 * Marks the reference to this object independent. Garbage collector |
398 * is free to ignore any object groups containing this object. | 398 * is free to ignore any object groups containing this object. |
399 * Weak callback for an independent handle should not | 399 * Weak callback for an independent handle should not |
400 * assume that it will be preceded by a global GC prologue callback | 400 * assume that it will be preceded by a global GC prologue callback |
401 * or followed by a global GC epilogue callback. | 401 * or followed by a global GC epilogue callback. |
402 */ | 402 */ |
403 inline void MarkIndependent(); | 403 inline void MarkIndependent(); |
404 | 404 |
405 /** | 405 /** Returns true if this handle was previously marked as independent. */ |
406 *Checks if the handle holds the only reference to an object. | 406 inline bool IsIndependent() const; |
407 */ | 407 |
| 408 /** Checks if the handle holds the only reference to an object. */ |
408 inline bool IsNearDeath() const; | 409 inline bool IsNearDeath() const; |
409 | 410 |
410 /** | 411 /** Returns true if the handle's reference is weak. */ |
411 * Returns true if the handle's reference is weak. | |
412 */ | |
413 inline bool IsWeak() const; | 412 inline bool IsWeak() const; |
414 | 413 |
415 /** | 414 /** |
416 * Assigns a wrapper class ID to the handle. See RetainedObjectInfo | 415 * Assigns a wrapper class ID to the handle. See RetainedObjectInfo |
417 * interface description in v8-profiler.h for details. | 416 * interface description in v8-profiler.h for details. |
418 */ | 417 */ |
419 inline void SetWrapperClassId(uint16_t class_id); | 418 inline void SetWrapperClassId(uint16_t class_id); |
420 | 419 |
| 420 /** |
| 421 * Returns the class ID previously assigned to this handle or 0 if no class |
| 422 * ID was previously assigned. |
| 423 */ |
| 424 inline uint16_t WrapperClassId() const; |
| 425 |
421 private: | 426 private: |
422 friend class ImplementationUtilities; | 427 friend class ImplementationUtilities; |
423 friend class ObjectTemplate; | 428 friend class ObjectTemplate; |
424 }; | 429 }; |
425 | 430 |
426 | 431 |
427 /** | 432 /** |
428 * A stack-allocated class that governs a number of local handles. | 433 * A stack-allocated class that governs a number of local handles. |
429 * After a handle scope has been created, all local handles will be | 434 * After a handle scope has been created, all local handles will be |
430 * allocated within that handle scope until either the handle scope is | 435 * allocated within that handle scope until either the handle scope is |
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3004 | 3009 |
3005 /** | 3010 /** |
3006 * Callback function passed to SetJitCodeEventHandler. | 3011 * Callback function passed to SetJitCodeEventHandler. |
3007 * | 3012 * |
3008 * \param event code add, move or removal event. | 3013 * \param event code add, move or removal event. |
3009 */ | 3014 */ |
3010 typedef void (*JitCodeEventHandler)(const JitCodeEvent* event); | 3015 typedef void (*JitCodeEventHandler)(const JitCodeEvent* event); |
3011 | 3016 |
3012 | 3017 |
3013 /** | 3018 /** |
3014 * Interface for iterating though all external resources in the heap. | 3019 * Interface for iterating through all external resources in the heap. |
3015 */ | 3020 */ |
3016 class V8EXPORT ExternalResourceVisitor { // NOLINT | 3021 class V8EXPORT ExternalResourceVisitor { // NOLINT |
3017 public: | 3022 public: |
3018 virtual ~ExternalResourceVisitor() {} | 3023 virtual ~ExternalResourceVisitor() {} |
3019 virtual void VisitExternalString(Handle<String> string) {} | 3024 virtual void VisitExternalString(Handle<String> string) {} |
3020 }; | 3025 }; |
3021 | 3026 |
3022 | 3027 |
3023 /** | 3028 /** |
| 3029 * Interface for iterating through all the persistent handles in the heap. |
| 3030 */ |
| 3031 class V8EXPORT PersistentHandleVisitor { // NOLINT |
| 3032 public: |
| 3033 virtual ~PersistentHandleVisitor() {} |
| 3034 virtual void VisitPersistentHandle(Persistent<Value> value, |
| 3035 uint16_t class_id) {} |
| 3036 }; |
| 3037 |
| 3038 |
| 3039 /** |
3024 * Container class for static utility functions. | 3040 * Container class for static utility functions. |
3025 */ | 3041 */ |
3026 class V8EXPORT V8 { | 3042 class V8EXPORT V8 { |
3027 public: | 3043 public: |
3028 /** Set the callback to invoke in case of fatal errors. */ | 3044 /** Set the callback to invoke in case of fatal errors. */ |
3029 static void SetFatalErrorHandler(FatalErrorCallback that); | 3045 static void SetFatalErrorHandler(FatalErrorCallback that); |
3030 | 3046 |
3031 /** | 3047 /** |
3032 * Set the callback to invoke to check if code generation from | 3048 * Set the callback to invoke to check if code generation from |
3033 * strings should be allowed. | 3049 * strings should be allowed. |
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3421 static void GetHeapStatistics(HeapStatistics* heap_statistics); | 3437 static void GetHeapStatistics(HeapStatistics* heap_statistics); |
3422 | 3438 |
3423 /** | 3439 /** |
3424 * Iterates through all external resources referenced from current isolate | 3440 * Iterates through all external resources referenced from current isolate |
3425 * heap. This method is not expected to be used except for debugging purposes | 3441 * heap. This method is not expected to be used except for debugging purposes |
3426 * and may be quite slow. | 3442 * and may be quite slow. |
3427 */ | 3443 */ |
3428 static void VisitExternalResources(ExternalResourceVisitor* visitor); | 3444 static void VisitExternalResources(ExternalResourceVisitor* visitor); |
3429 | 3445 |
3430 /** | 3446 /** |
| 3447 * Iterates through all the persistent handles in the current isolate's heap |
| 3448 * that have class_ids. |
| 3449 */ |
| 3450 static void VisitHandlesWithClassIds(PersistentHandleVisitor* visitor); |
| 3451 |
| 3452 /** |
3431 * Optional notification that the embedder is idle. | 3453 * Optional notification that the embedder is idle. |
3432 * V8 uses the notification to reduce memory footprint. | 3454 * V8 uses the notification to reduce memory footprint. |
3433 * This call can be used repeatedly if the embedder remains idle. | 3455 * This call can be used repeatedly if the embedder remains idle. |
3434 * Returns true if the embedder should stop calling IdleNotification | 3456 * Returns true if the embedder should stop calling IdleNotification |
3435 * until real work has been done. This indicates that V8 has done | 3457 * until real work has been done. This indicates that V8 has done |
3436 * as much cleanup as it will be able to do. | 3458 * as much cleanup as it will be able to do. |
3437 * | 3459 * |
3438 * The hint argument specifies the amount of work to be done in the function | 3460 * The hint argument specifies the amount of work to be done in the function |
3439 * on scale from 1 to 1000. There is no guarantee that the actual work will | 3461 * on scale from 1 to 1000. There is no guarantee that the actual work will |
3440 * match the hint. | 3462 * match the hint. |
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3458 private: | 3480 private: |
3459 V8(); | 3481 V8(); |
3460 | 3482 |
3461 static internal::Object** GlobalizeReference(internal::Object** handle); | 3483 static internal::Object** GlobalizeReference(internal::Object** handle); |
3462 static void DisposeGlobal(internal::Object** global_handle); | 3484 static void DisposeGlobal(internal::Object** global_handle); |
3463 static void MakeWeak(internal::Object** global_handle, | 3485 static void MakeWeak(internal::Object** global_handle, |
3464 void* data, | 3486 void* data, |
3465 WeakReferenceCallback); | 3487 WeakReferenceCallback); |
3466 static void ClearWeak(internal::Object** global_handle); | 3488 static void ClearWeak(internal::Object** global_handle); |
3467 static void MarkIndependent(internal::Object** global_handle); | 3489 static void MarkIndependent(internal::Object** global_handle); |
| 3490 static bool IsGlobalIndependent(internal::Object** global_handle); |
3468 static bool IsGlobalNearDeath(internal::Object** global_handle); | 3491 static bool IsGlobalNearDeath(internal::Object** global_handle); |
3469 static bool IsGlobalWeak(internal::Object** global_handle); | 3492 static bool IsGlobalWeak(internal::Object** global_handle); |
3470 static void SetWrapperClassId(internal::Object** global_handle, | 3493 static void SetWrapperClassId(internal::Object** global_handle, |
3471 uint16_t class_id); | 3494 uint16_t class_id); |
| 3495 static uint16_t GetWrapperClassId(internal::Object** global_handle); |
3472 | 3496 |
3473 template <class T> friend class Handle; | 3497 template <class T> friend class Handle; |
3474 template <class T> friend class Local; | 3498 template <class T> friend class Local; |
3475 template <class T> friend class Persistent; | 3499 template <class T> friend class Persistent; |
3476 friend class Context; | 3500 friend class Context; |
3477 }; | 3501 }; |
3478 | 3502 |
3479 | 3503 |
3480 /** | 3504 /** |
3481 * An external exception handler. | 3505 * An external exception handler. |
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4179 | 4203 |
4180 template <class T> | 4204 template <class T> |
4181 Persistent<T> Persistent<T>::New(Handle<T> that) { | 4205 Persistent<T> Persistent<T>::New(Handle<T> that) { |
4182 if (that.IsEmpty()) return Persistent<T>(); | 4206 if (that.IsEmpty()) return Persistent<T>(); |
4183 internal::Object** p = reinterpret_cast<internal::Object**>(*that); | 4207 internal::Object** p = reinterpret_cast<internal::Object**>(*that); |
4184 return Persistent<T>(reinterpret_cast<T*>(V8::GlobalizeReference(p))); | 4208 return Persistent<T>(reinterpret_cast<T*>(V8::GlobalizeReference(p))); |
4185 } | 4209 } |
4186 | 4210 |
4187 | 4211 |
4188 template <class T> | 4212 template <class T> |
| 4213 bool Persistent<T>::IsIndependent() const { |
| 4214 if (this->IsEmpty()) return false; |
| 4215 return V8::IsGlobalIndependent(reinterpret_cast<internal::Object**>(**this)); |
| 4216 } |
| 4217 |
| 4218 |
| 4219 template <class T> |
4189 bool Persistent<T>::IsNearDeath() const { | 4220 bool Persistent<T>::IsNearDeath() const { |
4190 if (this->IsEmpty()) return false; | 4221 if (this->IsEmpty()) return false; |
4191 return V8::IsGlobalNearDeath(reinterpret_cast<internal::Object**>(**this)); | 4222 return V8::IsGlobalNearDeath(reinterpret_cast<internal::Object**>(**this)); |
4192 } | 4223 } |
4193 | 4224 |
4194 | 4225 |
4195 template <class T> | 4226 template <class T> |
4196 bool Persistent<T>::IsWeak() const { | 4227 bool Persistent<T>::IsWeak() const { |
4197 if (this->IsEmpty()) return false; | 4228 if (this->IsEmpty()) return false; |
4198 return V8::IsGlobalWeak(reinterpret_cast<internal::Object**>(**this)); | 4229 return V8::IsGlobalWeak(reinterpret_cast<internal::Object**>(**this)); |
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4224 template <class T> | 4255 template <class T> |
4225 void Persistent<T>::MarkIndependent() { | 4256 void Persistent<T>::MarkIndependent() { |
4226 V8::MarkIndependent(reinterpret_cast<internal::Object**>(**this)); | 4257 V8::MarkIndependent(reinterpret_cast<internal::Object**>(**this)); |
4227 } | 4258 } |
4228 | 4259 |
4229 template <class T> | 4260 template <class T> |
4230 void Persistent<T>::SetWrapperClassId(uint16_t class_id) { | 4261 void Persistent<T>::SetWrapperClassId(uint16_t class_id) { |
4231 V8::SetWrapperClassId(reinterpret_cast<internal::Object**>(**this), class_id); | 4262 V8::SetWrapperClassId(reinterpret_cast<internal::Object**>(**this), class_id); |
4232 } | 4263 } |
4233 | 4264 |
| 4265 template <class T> |
| 4266 uint16_t Persistent<T>::WrapperClassId() const { |
| 4267 return V8::GetWrapperClassId(reinterpret_cast<internal::Object**>(**this)); |
| 4268 } |
| 4269 |
4234 Arguments::Arguments(internal::Object** implicit_args, | 4270 Arguments::Arguments(internal::Object** implicit_args, |
4235 internal::Object** values, int length, | 4271 internal::Object** values, int length, |
4236 bool is_construct_call) | 4272 bool is_construct_call) |
4237 : implicit_args_(implicit_args), | 4273 : implicit_args_(implicit_args), |
4238 values_(values), | 4274 values_(values), |
4239 length_(length), | 4275 length_(length), |
4240 is_construct_call_(is_construct_call) { } | 4276 is_construct_call_(is_construct_call) { } |
4241 | 4277 |
4242 | 4278 |
4243 Local<Value> Arguments::operator[](int i) const { | 4279 Local<Value> Arguments::operator[](int i) const { |
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4654 | 4690 |
4655 | 4691 |
4656 } // namespace v8 | 4692 } // namespace v8 |
4657 | 4693 |
4658 | 4694 |
4659 #undef V8EXPORT | 4695 #undef V8EXPORT |
4660 #undef TYPE_CHECK | 4696 #undef TYPE_CHECK |
4661 | 4697 |
4662 | 4698 |
4663 #endif // V8_H_ | 4699 #endif // V8_H_ |
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