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| 1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef V8_ZONE_ALLOCATOR_H_ | 5 #ifndef V8_ZONE_ZONE_ALLOCATOR_H_ |
| 6 #define V8_ZONE_ALLOCATOR_H_ | 6 #define V8_ZONE_ZONE_ALLOCATOR_H_ |
| 7 | |
| 8 #include <limits> | 7 #include <limits> |
| 9 | 8 |
| 10 #include "src/zone.h" | 9 #include "src/zone/zone.h" |
| 11 | 10 |
| 12 namespace v8 { | 11 namespace v8 { |
| 13 namespace internal { | 12 namespace internal { |
| 14 | 13 |
| 15 template<typename T> | 14 template <typename T> |
| 16 class zone_allocator { | 15 class zone_allocator { |
| 17 public: | 16 public: |
| 18 typedef T* pointer; | 17 typedef T* pointer; |
| 19 typedef const T* const_pointer; | 18 typedef const T* const_pointer; |
| 20 typedef T& reference; | 19 typedef T& reference; |
| 21 typedef const T& const_reference; | 20 typedef const T& const_reference; |
| 22 typedef T value_type; | 21 typedef T value_type; |
| 23 typedef size_t size_type; | 22 typedef size_t size_type; |
| 24 typedef ptrdiff_t difference_type; | 23 typedef ptrdiff_t difference_type; |
| 25 template<class O> struct rebind { | 24 template <class O> |
| 25 struct rebind { |
| 26 typedef zone_allocator<O> other; | 26 typedef zone_allocator<O> other; |
| 27 }; | 27 }; |
| 28 | 28 |
| 29 explicit zone_allocator(Zone* zone) throw() : zone_(zone) {} | 29 explicit zone_allocator(Zone* zone) throw() : zone_(zone) {} |
| 30 explicit zone_allocator(const zone_allocator& other) throw() | 30 explicit zone_allocator(const zone_allocator& other) throw() |
| 31 : zone_(other.zone_) {} | 31 : zone_(other.zone_) {} |
| 32 template<typename U> zone_allocator(const zone_allocator<U>& other) throw() | 32 template <typename U> |
| 33 : zone_(other.zone_) {} | 33 zone_allocator(const zone_allocator<U>& other) throw() : zone_(other.zone_) {} |
| 34 template<typename U> friend class zone_allocator; | 34 template <typename U> |
| 35 friend class zone_allocator; |
| 35 | 36 |
| 36 pointer address(reference x) const {return &x;} | 37 pointer address(reference x) const { return &x; } |
| 37 const_pointer address(const_reference x) const {return &x;} | 38 const_pointer address(const_reference x) const { return &x; } |
| 38 | 39 |
| 39 pointer allocate(size_type n, const void* hint = 0) { | 40 pointer allocate(size_type n, const void* hint = 0) { |
| 40 return static_cast<pointer>(zone_->NewArray<value_type>( | 41 return static_cast<pointer>( |
| 41 static_cast<int>(n))); | 42 zone_->NewArray<value_type>(static_cast<int>(n))); |
| 42 } | 43 } |
| 43 void deallocate(pointer p, size_type) { /* noop for Zones */ } | 44 void deallocate(pointer p, size_type) { /* noop for Zones */ |
| 45 } |
| 44 | 46 |
| 45 size_type max_size() const throw() { | 47 size_type max_size() const throw() { |
| 46 return std::numeric_limits<int>::max() / sizeof(value_type); | 48 return std::numeric_limits<int>::max() / sizeof(value_type); |
| 47 } | 49 } |
| 48 void construct(pointer p, const T& val) { | 50 void construct(pointer p, const T& val) { |
| 49 new(static_cast<void*>(p)) T(val); | 51 new (static_cast<void*>(p)) T(val); |
| 50 } | 52 } |
| 51 void destroy(pointer p) { p->~T(); } | 53 void destroy(pointer p) { p->~T(); } |
| 52 | 54 |
| 53 bool operator==(zone_allocator const& other) const { | 55 bool operator==(zone_allocator const& other) const { |
| 54 return zone_ == other.zone_; | 56 return zone_ == other.zone_; |
| 55 } | 57 } |
| 56 bool operator!=(zone_allocator const& other) const { | 58 bool operator!=(zone_allocator const& other) const { |
| 57 return zone_ != other.zone_; | 59 return zone_ != other.zone_; |
| 58 } | 60 } |
| 59 | 61 |
| 60 Zone* zone() { return zone_; } | 62 Zone* zone() { return zone_; } |
| 61 | 63 |
| 62 private: | 64 private: |
| 63 zone_allocator(); | 65 zone_allocator(); |
| 64 Zone* zone_; | 66 Zone* zone_; |
| 65 }; | 67 }; |
| 66 | 68 |
| 67 typedef zone_allocator<bool> ZoneBoolAllocator; | 69 typedef zone_allocator<bool> ZoneBoolAllocator; |
| 68 typedef zone_allocator<int> ZoneIntAllocator; | 70 typedef zone_allocator<int> ZoneIntAllocator; |
| 69 } // namespace internal | 71 } // namespace internal |
| 70 } // namespace v8 | 72 } // namespace v8 |
| 71 | 73 |
| 72 #endif // V8_ZONE_ALLOCATOR_H_ | 74 #endif // V8_ZONE_ZONE_ALLOCATOR_H_ |
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