blob: 30abe2180456b5af3b71a46a04bc19eb29db7597 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_ZONE_ALLOCATOR_H_
#define V8_ZONE_ALLOCATOR_H_
#include <limits>
#include "src/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>& other) throw()
: zone_(other.zone_) {}
template<typename U> friend class zone_allocator;
pointer address(reference x) const {return &x;}
const_pointer address(const_reference x) const {return &x;}
pointer allocate(size_type n, const void* hint = 0) {
return static_cast<pointer>(zone_->NewArray<value_type>(
static_cast<int>(n)));
}
void deallocate(pointer p, size_type) { /* noop for Zones */ }
size_type max_size() const throw() {
return std::numeric_limits<int>::max() / sizeof(value_type);
}
void construct(pointer p, const T& val) {
new(static_cast<void*>(p)) T(val);
}
void destroy(pointer p) { p->~T(); }
bool operator==(zone_allocator const& other) const {
return zone_ == other.zone_;
}
bool operator!=(zone_allocator const& other) const {
return zone_ != other.zone_;
}
Zone* zone() { return zone_; }
private:
zone_allocator();
Zone* zone_;
};
typedef zone_allocator<bool> ZoneBoolAllocator;
typedef zone_allocator<int> ZoneIntAllocator;
} } // namespace v8::internal
#endif // V8_ZONE_ALLOCATOR_H_
|
