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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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4052 */ | 4052 */ |
4053 void Exit(); | 4053 void Exit(); |
4054 | 4054 |
4055 /** | 4055 /** |
4056 * Disposes the isolate. The isolate must not be entered by any | 4056 * Disposes the isolate. The isolate must not be entered by any |
4057 * thread to be disposable. | 4057 * thread to be disposable. |
4058 */ | 4058 */ |
4059 void Dispose(); | 4059 void Dispose(); |
4060 | 4060 |
4061 /** | 4061 /** |
4062 * Associate embedder-specific data with the isolate | 4062 * Associate embedder-specific data with the isolate. This legacy method |
4063 * puts the data in the 0th slot. It will be deprecated soon. | |
4063 */ | 4064 */ |
4064 V8_INLINE void SetData(void* data); | 4065 V8_INLINE void SetData(void* data); |
4065 | 4066 |
4066 /** | 4067 /** |
4067 * Retrieve embedder-specific data from the isolate. | 4068 * Associate embedder-specific data with the isolate. |slot| has to be |
4069 * between 0 and GetNumberOfDataSlots() - 1. | |
4070 */ | |
4071 V8_INLINE void SetData(uint32_t slot, void* data); | |
4072 | |
4073 /** | |
4074 * Retrieve embedder-specific data from the isolate. This legacy method | |
4075 * retrieves the data from slot 0. It will be deprecated soon. | |
4068 * Returns NULL if SetData has never been called. | 4076 * Returns NULL if SetData has never been called. |
4069 */ | 4077 */ |
4070 V8_INLINE void* GetData(); | 4078 V8_INLINE void* GetData(); |
4071 | 4079 |
4072 /** | 4080 /** |
4081 * Retrieve embedder-specific data from the isolate. | |
4082 * Returns NULL if SetData has never been called for the given |slot|. | |
4083 */ | |
4084 V8_INLINE void* GetData(uint32_t slot); | |
4085 | |
4086 /** | |
4087 * Returns the maximum number of available embedder data slots. Valid slots | |
4088 * are in the range of 0 - GetNumberOfDataSlots() - 1. | |
4089 */ | |
4090 V8_INLINE static uint32_t GetNumberOfDataSlots(); | |
4091 | |
4092 /** | |
4073 * Get statistics about the heap memory usage. | 4093 * Get statistics about the heap memory usage. |
4074 */ | 4094 */ |
4075 void GetHeapStatistics(HeapStatistics* heap_statistics); | 4095 void GetHeapStatistics(HeapStatistics* heap_statistics); |
4076 | 4096 |
4077 /** | 4097 /** |
4078 * Adjusts the amount of registered external memory. Used to give V8 an | 4098 * Adjusts the amount of registered external memory. Used to give V8 an |
4079 * indication of the amount of externally allocated memory that is kept alive | 4099 * indication of the amount of externally allocated memory that is kept alive |
4080 * by JavaScript objects. V8 uses this to decide when to perform global | 4100 * by JavaScript objects. V8 uses this to decide when to perform global |
4081 * garbage collections. Registering externally allocated memory will trigger | 4101 * garbage collections. Registering externally allocated memory will trigger |
4082 * global garbage collections more often than it would otherwise in an attempt | 4102 * global garbage collections more often than it would otherwise in an attempt |
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5447 static const int kJSObjectHeaderSize = 3 * kApiPointerSize; | 5467 static const int kJSObjectHeaderSize = 3 * kApiPointerSize; |
5448 static const int kFixedArrayHeaderSize = 2 * kApiPointerSize; | 5468 static const int kFixedArrayHeaderSize = 2 * kApiPointerSize; |
5449 static const int kContextHeaderSize = 2 * kApiPointerSize; | 5469 static const int kContextHeaderSize = 2 * kApiPointerSize; |
5450 static const int kContextEmbedderDataIndex = 65; | 5470 static const int kContextEmbedderDataIndex = 65; |
5451 static const int kFullStringRepresentationMask = 0x07; | 5471 static const int kFullStringRepresentationMask = 0x07; |
5452 static const int kStringEncodingMask = 0x4; | 5472 static const int kStringEncodingMask = 0x4; |
5453 static const int kExternalTwoByteRepresentationTag = 0x02; | 5473 static const int kExternalTwoByteRepresentationTag = 0x02; |
5454 static const int kExternalAsciiRepresentationTag = 0x06; | 5474 static const int kExternalAsciiRepresentationTag = 0x06; |
5455 | 5475 |
5456 static const int kIsolateEmbedderDataOffset = 1 * kApiPointerSize; | 5476 static const int kIsolateEmbedderDataOffset = 1 * kApiPointerSize; |
5457 static const int kIsolateRootsOffset = 3 * kApiPointerSize; | 5477 static const int kIsolateRootsOffset = 6 * kApiPointerSize; |
5458 static const int kUndefinedValueRootIndex = 5; | 5478 static const int kUndefinedValueRootIndex = 5; |
5459 static const int kNullValueRootIndex = 7; | 5479 static const int kNullValueRootIndex = 7; |
5460 static const int kTrueValueRootIndex = 8; | 5480 static const int kTrueValueRootIndex = 8; |
5461 static const int kFalseValueRootIndex = 9; | 5481 static const int kFalseValueRootIndex = 9; |
5462 static const int kEmptyStringRootIndex = 134; | 5482 static const int kEmptyStringRootIndex = 134; |
5463 | 5483 |
5464 static const int kNodeClassIdOffset = 1 * kApiPointerSize; | 5484 static const int kNodeClassIdOffset = 1 * kApiPointerSize; |
5465 static const int kNodeFlagsOffset = 1 * kApiPointerSize + 3; | 5485 static const int kNodeFlagsOffset = 1 * kApiPointerSize + 3; |
5466 static const int kNodeStateMask = 0xf; | 5486 static const int kNodeStateMask = 0xf; |
5467 static const int kNodeStateIsWeakValue = 2; | 5487 static const int kNodeStateIsWeakValue = 2; |
5468 static const int kNodeStateIsPendingValue = 3; | 5488 static const int kNodeStateIsPendingValue = 3; |
5469 static const int kNodeStateIsNearDeathValue = 4; | 5489 static const int kNodeStateIsNearDeathValue = 4; |
5470 static const int kNodeIsIndependentShift = 4; | 5490 static const int kNodeIsIndependentShift = 4; |
5471 static const int kNodeIsPartiallyDependentShift = 5; | 5491 static const int kNodeIsPartiallyDependentShift = 5; |
5472 | 5492 |
5473 static const int kJSObjectType = 0xb2; | 5493 static const int kJSObjectType = 0xb2; |
5474 static const int kFirstNonstringType = 0x80; | 5494 static const int kFirstNonstringType = 0x80; |
5475 static const int kOddballType = 0x83; | 5495 static const int kOddballType = 0x83; |
5476 static const int kForeignType = 0x87; | 5496 static const int kForeignType = 0x87; |
5477 | 5497 |
5478 static const int kUndefinedOddballKind = 5; | 5498 static const int kUndefinedOddballKind = 5; |
5479 static const int kNullOddballKind = 3; | 5499 static const int kNullOddballKind = 3; |
5480 | 5500 |
5501 static const uint32_t kNumIsolateDataSlots = 4; | |
5502 | |
5481 V8_EXPORT static void CheckInitializedImpl(v8::Isolate* isolate); | 5503 V8_EXPORT static void CheckInitializedImpl(v8::Isolate* isolate); |
5482 V8_INLINE static void CheckInitialized(v8::Isolate* isolate) { | 5504 V8_INLINE static void CheckInitialized(v8::Isolate* isolate) { |
5483 #ifdef V8_ENABLE_CHECKS | 5505 #ifdef V8_ENABLE_CHECKS |
5484 CheckInitializedImpl(isolate); | 5506 CheckInitializedImpl(isolate); |
5485 #endif | 5507 #endif |
5486 } | 5508 } |
5487 | 5509 |
5488 V8_INLINE static bool HasHeapObjectTag(internal::Object* value) { | 5510 V8_INLINE static bool HasHeapObjectTag(internal::Object* value) { |
5489 return ((reinterpret_cast<intptr_t>(value) & kHeapObjectTagMask) == | 5511 return ((reinterpret_cast<intptr_t>(value) & kHeapObjectTagMask) == |
5490 kHeapObjectTag); | 5512 kHeapObjectTag); |
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5534 uint8_t* addr = reinterpret_cast<uint8_t*>(obj) + kNodeFlagsOffset; | 5556 uint8_t* addr = reinterpret_cast<uint8_t*>(obj) + kNodeFlagsOffset; |
5535 return *addr & kNodeStateMask; | 5557 return *addr & kNodeStateMask; |
5536 } | 5558 } |
5537 | 5559 |
5538 V8_INLINE static void UpdateNodeState(internal::Object** obj, | 5560 V8_INLINE static void UpdateNodeState(internal::Object** obj, |
5539 uint8_t value) { | 5561 uint8_t value) { |
5540 uint8_t* addr = reinterpret_cast<uint8_t*>(obj) + kNodeFlagsOffset; | 5562 uint8_t* addr = reinterpret_cast<uint8_t*>(obj) + kNodeFlagsOffset; |
5541 *addr = static_cast<uint8_t>((*addr & ~kNodeStateMask) | value); | 5563 *addr = static_cast<uint8_t>((*addr & ~kNodeStateMask) | value); |
5542 } | 5564 } |
5543 | 5565 |
5544 V8_INLINE static void SetEmbedderData(v8::Isolate* isolate, void* data) { | 5566 V8_INLINE static void SetEmbedderData(v8::Isolate *isolate, |
Paweł Hajdan Jr.
2013/12/18 12:49:55
Shouldn't there be V8_DEPRECATED SetEmbedderData(v
| |
5545 uint8_t* addr = reinterpret_cast<uint8_t*>(isolate) + | 5567 uint32_t slot, |
5546 kIsolateEmbedderDataOffset; | 5568 void *data) { |
5569 uint8_t *addr = reinterpret_cast<uint8_t *>(isolate) + | |
5570 kIsolateEmbedderDataOffset + slot * kApiPointerSize; | |
5547 *reinterpret_cast<void**>(addr) = data; | 5571 *reinterpret_cast<void**>(addr) = data; |
5548 } | 5572 } |
5549 | 5573 |
5550 V8_INLINE static void* GetEmbedderData(v8::Isolate* isolate) { | 5574 V8_INLINE static void* GetEmbedderData(v8::Isolate* isolate, uint32_t slot) { |
5551 uint8_t* addr = reinterpret_cast<uint8_t*>(isolate) + | 5575 uint8_t* addr = reinterpret_cast<uint8_t*>(isolate) + |
5552 kIsolateEmbedderDataOffset; | 5576 kIsolateEmbedderDataOffset + slot * kApiPointerSize; |
5553 return *reinterpret_cast<void**>(addr); | 5577 return *reinterpret_cast<void**>(addr); |
5554 } | 5578 } |
5555 | 5579 |
5556 V8_INLINE static internal::Object** GetRoot(v8::Isolate* isolate, | 5580 V8_INLINE static internal::Object** GetRoot(v8::Isolate* isolate, |
5557 int index) { | 5581 int index) { |
5558 uint8_t* addr = reinterpret_cast<uint8_t*>(isolate) + kIsolateRootsOffset; | 5582 uint8_t* addr = reinterpret_cast<uint8_t*>(isolate) + kIsolateRootsOffset; |
5559 return reinterpret_cast<internal::Object**>(addr + index * kApiPointerSize); | 5583 return reinterpret_cast<internal::Object**>(addr + index * kApiPointerSize); |
5560 } | 5584 } |
5561 | 5585 |
5562 template <typename T> V8_INLINE static T ReadField(Object* ptr, int offset) { | 5586 template <typename T> V8_INLINE static T ReadField(Object* ptr, int offset) { |
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6468 typedef internal::Object* S; | 6492 typedef internal::Object* S; |
6469 typedef internal::Internals I; | 6493 typedef internal::Internals I; |
6470 I::CheckInitialized(isolate); | 6494 I::CheckInitialized(isolate); |
6471 S* slot = I::GetRoot(isolate, I::kFalseValueRootIndex); | 6495 S* slot = I::GetRoot(isolate, I::kFalseValueRootIndex); |
6472 return Handle<Boolean>(reinterpret_cast<Boolean*>(slot)); | 6496 return Handle<Boolean>(reinterpret_cast<Boolean*>(slot)); |
6473 } | 6497 } |
6474 | 6498 |
6475 | 6499 |
6476 void Isolate::SetData(void* data) { | 6500 void Isolate::SetData(void* data) { |
6477 typedef internal::Internals I; | 6501 typedef internal::Internals I; |
6478 I::SetEmbedderData(this, data); | 6502 I::SetEmbedderData(this, 0, data); |
6479 } | 6503 } |
6480 | 6504 |
6481 | 6505 |
6482 void* Isolate::GetData() { | 6506 void* Isolate::GetData() { |
6483 typedef internal::Internals I; | 6507 typedef internal::Internals I; |
6484 return I::GetEmbedderData(this); | 6508 return I::GetEmbedderData(this, 0); |
6485 } | 6509 } |
6486 | 6510 |
6487 | 6511 |
6512 void Isolate::SetData(uint32_t slot, void* data) { | |
6513 typedef internal::Internals I; | |
6514 I::SetEmbedderData(this, slot, data); | |
6515 } | |
6516 | |
6517 | |
6518 void* Isolate::GetData(uint32_t slot) { | |
6519 typedef internal::Internals I; | |
6520 return I::GetEmbedderData(this, slot); | |
6521 } | |
6522 | |
6523 | |
6524 uint32_t Isolate::GetNumberOfDataSlots() { | |
6525 typedef internal::Internals I; | |
6526 return I::kNumIsolateDataSlots; | |
6527 } | |
6528 | |
6529 | |
6488 template<typename T> | 6530 template<typename T> |
6489 void Isolate::SetObjectGroupId(const Persistent<T>& object, | 6531 void Isolate::SetObjectGroupId(const Persistent<T>& object, |
6490 UniqueId id) { | 6532 UniqueId id) { |
6491 TYPE_CHECK(Value, T); | 6533 TYPE_CHECK(Value, T); |
6492 SetObjectGroupId(reinterpret_cast<v8::internal::Object**>(object.val_), id); | 6534 SetObjectGroupId(reinterpret_cast<v8::internal::Object**>(object.val_), id); |
6493 } | 6535 } |
6494 | 6536 |
6495 | 6537 |
6496 template<typename T> | 6538 template<typename T> |
6497 void Isolate::SetReferenceFromGroup(UniqueId id, | 6539 void Isolate::SetReferenceFromGroup(UniqueId id, |
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6549 */ | 6591 */ |
6550 | 6592 |
6551 | 6593 |
6552 } // namespace v8 | 6594 } // namespace v8 |
6553 | 6595 |
6554 | 6596 |
6555 #undef TYPE_CHECK | 6597 #undef TYPE_CHECK |
6556 | 6598 |
6557 | 6599 |
6558 #endif // V8_H_ | 6600 #endif // V8_H_ |
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