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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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392 // neat in some ways, but it would expose internal implementation details in | 392 // neat in some ways, but it would expose internal implementation details in |
393 // our public header file, which is undesirable. | 393 // our public header file, which is undesirable. |
394 // | 394 // |
395 // An isolate has a single instance of this class to hold the current thread's | 395 // An isolate has a single instance of this class to hold the current thread's |
396 // data. In multithreaded V8 programs this data is copied in and out of storage | 396 // data. In multithreaded V8 programs this data is copied in and out of storage |
397 // so that the currently executing thread always has its own copy of this | 397 // so that the currently executing thread always has its own copy of this |
398 // data. | 398 // data. |
399 ISOLATED_CLASS HandleScopeImplementer { | 399 ISOLATED_CLASS HandleScopeImplementer { |
400 public: | 400 public: |
401 | 401 |
402 explicit HandleScopeImplementer(Isolate* isolate) | 402 HandleScopeImplementer() |
403 : isolate_(isolate), | 403 : blocks_(0), |
404 blocks_(0), | |
405 entered_contexts_(0), | 404 entered_contexts_(0), |
406 saved_contexts_(0), | 405 saved_contexts_(0), |
407 spare_(NULL), | 406 spare_(NULL), |
408 ignore_out_of_memory_(false), | 407 ignore_out_of_memory_(false), |
409 call_depth_(0) { } | 408 call_depth_(0) { } |
410 | 409 |
411 // Threading support for handle data. | 410 // Threading support for handle data. |
412 static int ArchiveSpacePerThread(); | 411 static int ArchiveSpacePerThread(); |
413 char* RestoreThread(char* from); | 412 char* RestoreThread(char* from); |
414 char* ArchiveThread(char* to); | 413 char* ArchiveThread(char* to); |
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460 blocks_.Free(); | 459 blocks_.Free(); |
461 entered_contexts_.Free(); | 460 entered_contexts_.Free(); |
462 saved_contexts_.Free(); | 461 saved_contexts_.Free(); |
463 if (spare_ != NULL) { | 462 if (spare_ != NULL) { |
464 DeleteArray(spare_); | 463 DeleteArray(spare_); |
465 spare_ = NULL; | 464 spare_ = NULL; |
466 } | 465 } |
467 ASSERT(call_depth_ == 0); | 466 ASSERT(call_depth_ == 0); |
468 } | 467 } |
469 | 468 |
470 Isolate* isolate_; | |
471 List<internal::Object**> blocks_; | 469 List<internal::Object**> blocks_; |
472 // Used as a stack to keep track of entered contexts. | 470 // Used as a stack to keep track of entered contexts. |
473 List<Handle<Object> > entered_contexts_; | 471 List<Handle<Object> > entered_contexts_; |
474 // Used as a stack to keep track of saved contexts. | 472 // Used as a stack to keep track of saved contexts. |
475 List<Context*> saved_contexts_; | 473 List<Context*> saved_contexts_; |
476 Object** spare_; | 474 Object** spare_; |
477 bool ignore_out_of_memory_; | 475 bool ignore_out_of_memory_; |
478 int call_depth_; | 476 int call_depth_; |
479 // This is only used for threading support. | 477 // This is only used for threading support. |
480 v8::ImplementationUtilities::HandleScopeData handle_scope_data_; | 478 v8::ImplementationUtilities::HandleScopeData handle_scope_data_; |
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565 stress_type_ = stress_type; | 563 stress_type_ = stress_type; |
566 } | 564 } |
567 | 565 |
568 private: | 566 private: |
569 static v8::Testing::StressType stress_type_; | 567 static v8::Testing::StressType stress_type_; |
570 }; | 568 }; |
571 | 569 |
572 } } // namespace v8::internal | 570 } } // namespace v8::internal |
573 | 571 |
574 #endif // V8_API_H_ | 572 #endif // V8_API_H_ |
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