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| 1 // Copyright 2008 the V8 project authors. All rights reserved. | 1 // Copyright 2008 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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| 331 // Threading support for handle data. | 331 // Threading support for handle data. |
| 332 static int ArchiveSpacePerThread(); | 332 static int ArchiveSpacePerThread(); |
| 333 static char* RestoreThread(char* from); | 333 static char* RestoreThread(char* from); |
| 334 static char* ArchiveThread(char* to); | 334 static char* ArchiveThread(char* to); |
| 335 | 335 |
| 336 // Garbage collection support. | 336 // Garbage collection support. |
| 337 static void Iterate(v8::internal::ObjectVisitor* v); | 337 static void Iterate(v8::internal::ObjectVisitor* v); |
| 338 static char* Iterate(v8::internal::ObjectVisitor* v, char* data); | 338 static char* Iterate(v8::internal::ObjectVisitor* v, char* data); |
| 339 | 339 |
| 340 | 340 |
| 341 inline void** GetSpareOrNewBlock(); | 341 inline internal::Object** GetSpareOrNewBlock(); |
| 342 inline void DeleteExtensions(int extensions); | 342 inline void DeleteExtensions(int extensions); |
| 343 | 343 |
| 344 inline void IncrementCallDepth() {call_depth++;} | 344 inline void IncrementCallDepth() {call_depth++;} |
| 345 inline void DecrementCallDepth() {call_depth--;} | 345 inline void DecrementCallDepth() {call_depth--;} |
| 346 inline bool CallDepthIsZero() { return call_depth == 0; } | 346 inline bool CallDepthIsZero() { return call_depth == 0; } |
| 347 | 347 |
| 348 inline void EnterContext(Handle<Object> context); | 348 inline void EnterContext(Handle<Object> context); |
| 349 inline bool LeaveLastContext(); | 349 inline bool LeaveLastContext(); |
| 350 | 350 |
| 351 // Returns the last entered context or an empty handle if no | 351 // Returns the last entered context or an empty handle if no |
| 352 // contexts have been entered. | 352 // contexts have been entered. |
| 353 inline Handle<Object> LastEnteredContext(); | 353 inline Handle<Object> LastEnteredContext(); |
| 354 | 354 |
| 355 inline void SaveContext(Handle<Object> context); | 355 inline void SaveContext(Handle<Object> context); |
| 356 inline Handle<Object> RestoreContext(); | 356 inline Handle<Object> RestoreContext(); |
| 357 inline bool HasSavedContexts(); | 357 inline bool HasSavedContexts(); |
| 358 | 358 |
| 359 inline List<void**>* Blocks() { return &blocks; } | 359 inline List<internal::Object**>* Blocks() { return &blocks; } |
| 360 | 360 |
| 361 inline bool IgnoreOutOfMemory() { return ignore_out_of_memory; } | 361 inline bool IgnoreOutOfMemory() { return ignore_out_of_memory; } |
| 362 inline void SetIgnoreOutOfMemory(bool value) { ignore_out_of_memory = value; } | 362 inline void SetIgnoreOutOfMemory(bool value) { ignore_out_of_memory = value; } |
| 363 | 363 |
| 364 private: | 364 private: |
| 365 List<void**> blocks; | 365 List<internal::Object**> blocks; |
| 366 Object** spare; | 366 Object** spare; |
| 367 int call_depth; | 367 int call_depth; |
| 368 // Used as a stack to keep track of entered contexts. | 368 // Used as a stack to keep track of entered contexts. |
| 369 List<Handle<Object> > entered_contexts_; | 369 List<Handle<Object> > entered_contexts_; |
| 370 // Used as a stack to keep track of saved contexts. | 370 // Used as a stack to keep track of saved contexts. |
| 371 List<Handle<Object> > saved_contexts_; | 371 List<Handle<Object> > saved_contexts_; |
| 372 bool ignore_out_of_memory; | 372 bool ignore_out_of_memory; |
| 373 // This is only used for threading support. | 373 // This is only used for threading support. |
| 374 v8::ImplementationUtilities::HandleScopeData handle_scope_data_; | 374 v8::ImplementationUtilities::HandleScopeData handle_scope_data_; |
| 375 | 375 |
| 376 static void Iterate(ObjectVisitor* v, | 376 static void Iterate(ObjectVisitor* v, |
| 377 List<void**>* blocks, | 377 List<internal::Object**>* blocks, |
| 378 v8::ImplementationUtilities::HandleScopeData* handle_data); | 378 v8::ImplementationUtilities::HandleScopeData* handle_data); |
| 379 char* RestoreThreadHelper(char* from); | 379 char* RestoreThreadHelper(char* from); |
| 380 char* ArchiveThreadHelper(char* to); | 380 char* ArchiveThreadHelper(char* to); |
| 381 | 381 |
| 382 DISALLOW_COPY_AND_ASSIGN(HandleScopeImplementer); | 382 DISALLOW_COPY_AND_ASSIGN(HandleScopeImplementer); |
| 383 }; | 383 }; |
| 384 | 384 |
| 385 | 385 |
| 386 static const int kHandleBlockSize = v8::internal::KB - 2; // fit in one page | 386 static const int kHandleBlockSize = v8::internal::KB - 2; // fit in one page |
| 387 | 387 |
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| 413 } | 413 } |
| 414 | 414 |
| 415 | 415 |
| 416 Handle<Object> HandleScopeImplementer::LastEnteredContext() { | 416 Handle<Object> HandleScopeImplementer::LastEnteredContext() { |
| 417 if (entered_contexts_.is_empty()) return Handle<Object>::null(); | 417 if (entered_contexts_.is_empty()) return Handle<Object>::null(); |
| 418 return entered_contexts_.last(); | 418 return entered_contexts_.last(); |
| 419 } | 419 } |
| 420 | 420 |
| 421 | 421 |
| 422 // If there's a spare block, use it for growing the current scope. | 422 // If there's a spare block, use it for growing the current scope. |
| 423 void** HandleScopeImplementer::GetSpareOrNewBlock() { | 423 internal::Object** HandleScopeImplementer::GetSpareOrNewBlock() { |
| 424 void** block = (spare != NULL) ? | 424 internal::Object** block = (spare != NULL) ? |
| 425 reinterpret_cast<void**>(spare) : | 425 spare : |
| 426 NewArray<void*>(kHandleBlockSize); | 426 NewArray<internal::Object*>(kHandleBlockSize); |
| 427 spare = NULL; | 427 spare = NULL; |
| 428 return block; | 428 return block; |
| 429 } | 429 } |
| 430 | 430 |
| 431 | 431 |
| 432 void HandleScopeImplementer::DeleteExtensions(int extensions) { | 432 void HandleScopeImplementer::DeleteExtensions(int extensions) { |
| 433 if (spare != NULL) { | 433 if (spare != NULL) { |
| 434 DeleteArray(spare); | 434 DeleteArray(spare); |
| 435 spare = NULL; | 435 spare = NULL; |
| 436 } | 436 } |
| 437 for (int i = extensions; i > 1; --i) { | 437 for (int i = extensions; i > 1; --i) { |
| 438 void** block = blocks.RemoveLast(); | 438 internal::Object** block = blocks.RemoveLast(); |
| 439 #ifdef DEBUG | 439 #ifdef DEBUG |
| 440 v8::ImplementationUtilities::ZapHandleRange(block, | 440 v8::ImplementationUtilities::ZapHandleRange(block, |
| 441 &block[kHandleBlockSize]); | 441 &block[kHandleBlockSize]); |
| 442 #endif | 442 #endif |
| 443 DeleteArray(block); | 443 DeleteArray(block); |
| 444 } | 444 } |
| 445 spare = reinterpret_cast<Object**>(blocks.RemoveLast()); | 445 spare = blocks.RemoveLast(); |
| 446 #ifdef DEBUG | 446 #ifdef DEBUG |
| 447 v8::ImplementationUtilities::ZapHandleRange( | 447 v8::ImplementationUtilities::ZapHandleRange( |
| 448 reinterpret_cast<void**>(spare), | 448 spare, |
| 449 reinterpret_cast<void**>(&spare[kHandleBlockSize])); | 449 &spare[kHandleBlockSize]); |
| 450 #endif | 450 #endif |
| 451 } | 451 } |
| 452 | 452 |
| 453 } } // namespace v8::internal | 453 } } // namespace v8::internal |
| 454 | 454 |
| 455 #endif // V8_API_H_ | 455 #endif // V8_API_H_ |
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