5202249e65
R=rossberg@chromium.org Review URL: https://codereview.chromium.org/165943005 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19498 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
91 lines
3.2 KiB
C++
91 lines
3.2 KiB
C++
// Copyright 2014 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef V8_ZONE_ALLOCATOR_H_
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#define V8_ZONE_ALLOCATOR_H_
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#include "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 count, const void* hint = 0) {
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size_t size = count * sizeof(value_type);
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size = RoundUp(size, kPointerSize);
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return static_cast<pointer>(zone_->New(size));
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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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size_type max = static_cast<size_type>(-1) / sizeof(T);
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return (max > 0 ? max : 1);
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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) {
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return zone_ == other.zone_;
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}
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bool operator!=(zone_allocator const& other) {
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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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} } // namespace v8::internal
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#endif // V8_ZONE_ALLOCATOR_H_
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