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// Copyright 2014 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef V8_ZONE_ALLOCATOR_H_
#define V8_ZONE_ALLOCATOR_H_
#include "zone.h"
namespace v8 {
namespace internal {
template<typename T>
class zone_allocator {
public:
typedef T* pointer;
typedef const T* const_pointer;
typedef T& reference;
typedef const T& const_reference;
typedef T value_type;
typedef size_t size_type;
typedef ptrdiff_t difference_type;
template<class O> struct rebind {
typedef zone_allocator<O> other;
};
explicit zone_allocator(Zone* zone) throw() : zone_(zone) {}
explicit zone_allocator(const zone_allocator& other) throw()
: zone_(other.zone_) {}
template<typename U> zone_allocator(const zone_allocator<U>&) throw() {}
pointer address(reference x) const {return &x;}
const_pointer address(const_reference x) const {return &x;}
pointer allocate(size_type count, const void* hint = 0) {
size_t size = count * sizeof(value_type);
size = RoundUp(size, kPointerSize);
return static_cast<pointer>(zone_->New(size));
}
void deallocate(pointer p, size_type) { /* noop for Zones */ }
size_type max_size() const throw() {
size_type max = static_cast<size_type>(-1) / sizeof(T);
return (max > 0 ? max : 1);
}
void construct(pointer p, const T& val) {
new(static_cast<void*>(p)) T(val);
}
void destroy(pointer p) { (static_cast<T*>(p))->~T(); }
private:
Zone* zone_;
};
} } // namespace v8::internal
#endif // V8_ZONE_ALLOCATOR_H_
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