V8 API Reference, 7.2.502.16 (for Deno 0.2.4)
address-region.h
1 // Copyright 2018 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_BASE_ADDRESS_REGION_H_
6 #define V8_BASE_ADDRESS_REGION_H_
7 
8 #include <iostream>
9 
10 #include "src/base/macros.h"
11 
12 namespace v8 {
13 namespace base {
14 
15 // Helper class representing an address region of certain size.
17  public:
18  typedef uintptr_t Address;
19 
20  AddressRegion() = default;
21 
22  AddressRegion(Address address, size_t size)
23  : address_(address), size_(size) {}
24 
25  Address begin() const { return address_; }
26  Address end() const { return address_ + size_; }
27 
28  size_t size() const { return size_; }
29  void set_size(size_t size) { size_ = size; }
30 
31  bool is_empty() const { return size_ == 0; }
32 
33  bool contains(Address address) const {
34  STATIC_ASSERT(std::is_unsigned<Address>::value);
35  return (address - begin()) < size();
36  }
37 
38  bool contains(Address address, size_t size) const {
39  STATIC_ASSERT(std::is_unsigned<Address>::value);
40  Address offset = address - begin();
41  return (offset < size_) && (offset + size <= size_);
42  }
43 
44  bool contains(AddressRegion region) const {
45  return contains(region.address_, region.size_);
46  }
47 
48  bool operator==(AddressRegion other) const {
49  return address_ == other.address_ && size_ == other.size_;
50  }
51 
52  bool operator!=(AddressRegion other) const {
53  return address_ != other.address_ || size_ != other.size_;
54  }
55 
56  private:
57  Address address_ = 0;
58  size_t size_ = 0;
59 };
60 ASSERT_TRIVIALLY_COPYABLE(AddressRegion);
61 
62 inline std::ostream& operator<<(std::ostream& out, AddressRegion region) {
63  return out << "[" << reinterpret_cast<void*>(region.begin()) << "+"
64  << region.size() << "]";
65 }
66 
67 } // namespace base
68 } // namespace v8
69 
70 #endif // V8_BASE_ADDRESS_REGION_H_
Definition: libplatform.h:13