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Side by Side Diff: src/zone/zone-allocator.h

Issue 2344143003: Moved zones and zone related stuff in its own directory. (Closed)
Patch Set: Merge branch 'master' into zonefolder Created 4 years, 3 months ago
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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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