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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 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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24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | 27 |
28 #ifndef V8_GLOBAL_HANDLES_H_ | 28 #ifndef V8_GLOBAL_HANDLES_H_ |
29 #define V8_GLOBAL_HANDLES_H_ | 29 #define V8_GLOBAL_HANDLES_H_ |
30 | 30 |
31 #include "../include/v8.h" | 31 #include "../include/v8.h" |
32 #include "../include/v8-profiler.h" | 32 #include "../include/v8-profiler.h" |
33 | 33 |
34 #include "handles.h" | |
35 #include "list.h" | 34 #include "list.h" |
36 #include "v8utils.h" | 35 #include "v8utils.h" |
37 | 36 |
38 namespace v8 { | 37 namespace v8 { |
39 namespace internal { | 38 namespace internal { |
40 | 39 |
41 class GCTracer; | 40 class GCTracer; |
42 class HeapStats; | 41 class HeapStats; |
43 class ObjectVisitor; | 42 class ObjectVisitor; |
44 | 43 |
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325 List<ObjectGroupConnection> object_group_connections_; | 324 List<ObjectGroupConnection> object_group_connections_; |
326 List<ObjectGroupRetainerInfo> retainer_infos_; | 325 List<ObjectGroupRetainerInfo> retainer_infos_; |
327 List<ObjectGroupConnection> implicit_ref_connections_; | 326 List<ObjectGroupConnection> implicit_ref_connections_; |
328 | 327 |
329 friend class Isolate; | 328 friend class Isolate; |
330 | 329 |
331 DISALLOW_COPY_AND_ASSIGN(GlobalHandles); | 330 DISALLOW_COPY_AND_ASSIGN(GlobalHandles); |
332 }; | 331 }; |
333 | 332 |
334 | 333 |
335 class EternalHandles { | |
336 public: | |
337 enum SingletonHandle { | |
338 I18N_TEMPLATE_ONE, | |
339 I18N_TEMPLATE_TWO, | |
340 | |
341 NUMBER_OF_SINGLETON_HANDLES | |
342 }; | |
343 | |
344 EternalHandles(); | |
345 ~EternalHandles(); | |
346 | |
347 int NumberOfHandles() { return size_; } | |
348 | |
349 // Create an EternalHandle, returning the index. | |
350 int Create(Isolate* isolate, Object* object); | |
351 | |
352 // Grab the handle for an existing EternalHandle. | |
353 inline Handle<Object> Get(int index) { | |
354 return Handle<Object>(GetLocation(index)); | |
355 } | |
356 | |
357 // Grab the handle for an existing SingletonHandle. | |
358 inline Handle<Object> GetSingleton(SingletonHandle singleton) { | |
359 ASSERT(Exists(singleton)); | |
360 return Get(singleton_handles_[singleton]); | |
361 } | |
362 | |
363 // Checks whether a SingletonHandle has been assigned. | |
364 inline bool Exists(SingletonHandle singleton) { | |
365 return singleton_handles_[singleton] != kInvalidIndex; | |
366 } | |
367 | |
368 // Assign a SingletonHandle to an empty slot and returns the handle. | |
369 Handle<Object> CreateSingleton(Isolate* isolate, | |
370 Object* object, | |
371 SingletonHandle singleton) { | |
372 ASSERT(singleton_handles_[singleton] == kInvalidIndex); | |
373 singleton_handles_[singleton] = Create(isolate, object); | |
374 return Get(singleton_handles_[singleton]); | |
375 } | |
376 | |
377 // Iterates over all handles. | |
378 void IterateAllRoots(ObjectVisitor* visitor); | |
379 // Iterates over all handles which might be in new space. | |
380 void IterateNewSpaceRoots(ObjectVisitor* visitor); | |
381 // Rebuilds new space list. | |
382 void PostGarbageCollectionProcessing(Heap* heap); | |
383 | |
384 private: | |
385 static const int kInvalidIndex = -1; | |
386 static const int kShift = 8; | |
387 static const int kSize = 1 << kShift; | |
388 static const int kMask = 0xff; | |
389 | |
390 // Gets the slot for an index | |
391 inline Object** GetLocation(int index) { | |
392 ASSERT(index >= 0 && index < size_); | |
393 return &blocks_[index >> kShift][index & kMask]; | |
394 } | |
395 | |
396 int size_; | |
397 List<Object**> blocks_; | |
398 List<int> new_space_indices_; | |
399 int singleton_handles_[NUMBER_OF_SINGLETON_HANDLES]; | |
400 | |
401 DISALLOW_COPY_AND_ASSIGN(EternalHandles); | |
402 }; | |
403 | |
404 | |
405 } } // namespace v8::internal | 334 } } // namespace v8::internal |
406 | 335 |
407 #endif // V8_GLOBAL_HANDLES_H_ | 336 #endif // V8_GLOBAL_HANDLES_H_ |
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