f9e4527f32
R=jarin@chromium.org TEST=cctest/test-scheduler/NestedFloatingDiamondWithChain Review URL: https://codereview.chromium.org/738613005 Cr-Commit-Position: refs/heads/master@{#25621}
70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_ZONE_ALLOCATOR_H_
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#define V8_ZONE_ALLOCATOR_H_
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#include <limits>
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#include "src/zone.h"
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namespace v8 {
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namespace internal {
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template<typename T>
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class zone_allocator {
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public:
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typedef T* pointer;
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typedef const T* const_pointer;
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typedef T& reference;
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typedef const T& const_reference;
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typedef T value_type;
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typedef size_t size_type;
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typedef ptrdiff_t difference_type;
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template<class O> struct rebind {
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typedef zone_allocator<O> other;
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};
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explicit zone_allocator(Zone* zone) throw() : zone_(zone) {}
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explicit zone_allocator(const zone_allocator& other) throw()
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: zone_(other.zone_) {}
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template<typename U> zone_allocator(const zone_allocator<U>& other) throw()
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: zone_(other.zone_) {}
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template<typename U> friend class zone_allocator;
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pointer address(reference x) const {return &x;}
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const_pointer address(const_reference x) const {return &x;}
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pointer allocate(size_type n, const void* hint = 0) {
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return static_cast<pointer>(zone_->NewArray<value_type>(
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static_cast<int>(n)));
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}
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void deallocate(pointer p, size_type) { /* noop for Zones */ }
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size_type max_size() const throw() {
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return std::numeric_limits<int>::max() / sizeof(value_type);
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}
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void construct(pointer p, const T& val) {
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new(static_cast<void*>(p)) T(val);
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}
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void destroy(pointer p) { p->~T(); }
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bool operator==(zone_allocator const& other) const {
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return zone_ == other.zone_;
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}
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bool operator!=(zone_allocator const& other) const {
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return zone_ != other.zone_;
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}
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private:
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zone_allocator();
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Zone* zone_;
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};
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typedef zone_allocator<bool> ZoneBoolAllocator;
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typedef zone_allocator<int> ZoneIntAllocator;
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} } // namespace v8::internal
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#endif // V8_ZONE_ALLOCATOR_H_
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