Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 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 |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef V8_ZONE_ALLOCATOR_H_ |
| 6 | #define V8_ZONE_ALLOCATOR_H_ |
| 7 | |
| 8 | #include <limits> |
| 9 | |
| 10 | #include "src/zone.h" |
| 11 | |
| 12 | namespace v8 { |
| 13 | namespace internal { |
| 14 | |
| 15 | template<typename T> |
| 16 | class zone_allocator { |
| 17 | public: |
| 18 | typedef T* pointer; |
| 19 | typedef const T* const_pointer; |
| 20 | typedef T& reference; |
| 21 | typedef const T& const_reference; |
| 22 | typedef T value_type; |
| 23 | typedef size_t size_type; |
| 24 | typedef ptrdiff_t difference_type; |
| 25 | template<class O> struct rebind { |
| 26 | typedef zone_allocator<O> other; |
| 27 | }; |
| 28 | |
| 29 | explicit zone_allocator(Zone* zone) throw() : zone_(zone) {} |
| 30 | explicit zone_allocator(const zone_allocator& other) throw() |
| 31 | : zone_(other.zone_) {} |
| 32 | template<typename U> zone_allocator(const zone_allocator<U>& other) throw() |
| 33 | : zone_(other.zone_) {} |
| 34 | template<typename U> friend class zone_allocator; |
| 35 | |
| 36 | pointer address(reference x) const {return &x;} |
| 37 | const_pointer address(const_reference x) const {return &x;} |
| 38 | |
| 39 | pointer allocate(size_type n, const void* hint = 0) { |
| 40 | return static_cast<pointer>(zone_->NewArray<value_type>( |
| 41 | static_cast<int>(n))); |
| 42 | } |
| 43 | void deallocate(pointer p, size_type) { /* noop for Zones */ } |
| 44 | |
| 45 | size_type max_size() const throw() { |
| 46 | return std::numeric_limits<int>::max() / sizeof(value_type); |
| 47 | } |
| 48 | void construct(pointer p, const T& val) { |
| 49 | new(static_cast<void*>(p)) T(val); |
| 50 | } |
| 51 | void destroy(pointer p) { p->~T(); } |
| 52 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 53 | bool operator==(zone_allocator const& other) const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 54 | return zone_ == other.zone_; |
| 55 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 56 | bool operator!=(zone_allocator const& other) const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 57 | return zone_ != other.zone_; |
| 58 | } |
| 59 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 60 | Zone* zone() { return zone_; } |
| 61 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 62 | private: |
| 63 | zone_allocator(); |
| 64 | Zone* zone_; |
| 65 | }; |
| 66 | |
| 67 | typedef zone_allocator<bool> ZoneBoolAllocator; |
| 68 | typedef zone_allocator<int> ZoneIntAllocator; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 69 | } // namespace internal |
| 70 | } // namespace v8 |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 71 | |
| 72 | #endif // V8_ZONE_ALLOCATOR_H_ |