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Steve Blocka7e24c12009-10-30 11:49:00 +00001// Copyright 2006-2008 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6// * Redistributions of source code must retain the above copyright
7// notice, this list of conditions and the following disclaimer.
8// * Redistributions in binary form must reproduce the above
9// copyright notice, this list of conditions and the following
10// disclaimer in the documentation and/or other materials provided
11// with the distribution.
12// * Neither the name of Google Inc. nor the names of its
13// contributors may be used to endorse or promote products derived
14// from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28#ifndef V8_MEMORY_H_
29#define V8_MEMORY_H_
30
31namespace v8 {
32namespace internal {
33
34// Memory provides an interface to 'raw' memory. It encapsulates the casts
35// that typically are needed when incompatible pointer types are used.
36
37class Memory {
38 public:
39 static uint16_t& uint16_at(Address addr) {
40 return *reinterpret_cast<uint16_t*>(addr);
41 }
42
43 static uint32_t& uint32_at(Address addr) {
44 return *reinterpret_cast<uint32_t*>(addr);
45 }
46
47 static int32_t& int32_at(Address addr) {
48 return *reinterpret_cast<int32_t*>(addr);
49 }
50
51 static uint64_t& uint64_at(Address addr) {
52 return *reinterpret_cast<uint64_t*>(addr);
53 }
54
55 static int& int_at(Address addr) {
56 return *reinterpret_cast<int*>(addr);
57 }
58
59 static Address& Address_at(Address addr) {
60 return *reinterpret_cast<Address*>(addr);
61 }
62
63 static Object*& Object_at(Address addr) {
64 return *reinterpret_cast<Object**>(addr);
65 }
66};
67
68} } // namespace v8::internal
69
70#endif // V8_MEMORY_H_