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1 // 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 | |
31 namespace v8 { | |
32 namespace 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 | |
37 class Memory { | |
38 public: | |
39 static uint8_t& uint8_at(Address addr) { | |
40 return *reinterpret_cast<uint8_t*>(addr); | |
41 } | |
42 | |
43 static uint16_t& uint16_at(Address addr) { | |
44 return *reinterpret_cast<uint16_t*>(addr); | |
45 } | |
46 | |
47 static uint32_t& uint32_at(Address addr) { | |
48 return *reinterpret_cast<uint32_t*>(addr); | |
49 } | |
50 | |
51 static int32_t& int32_at(Address addr) { | |
52 return *reinterpret_cast<int32_t*>(addr); | |
53 } | |
54 | |
55 static uint64_t& uint64_at(Address addr) { | |
56 return *reinterpret_cast<uint64_t*>(addr); | |
57 } | |
58 | |
59 static int& int_at(Address addr) { | |
60 return *reinterpret_cast<int*>(addr); | |
61 } | |
62 | |
63 static double& double_at(Address addr) { | |
64 return *reinterpret_cast<double*>(addr); | |
65 } | |
66 | |
67 static Address& Address_at(Address addr) { | |
68 return *reinterpret_cast<Address*>(addr); | |
69 } | |
70 | |
71 static Object*& Object_at(Address addr) { | |
72 return *reinterpret_cast<Object**>(addr); | |
73 } | |
74 | |
75 static Handle<Object>& Object_Handle_at(Address addr) { | |
76 return *reinterpret_cast<Handle<Object>*>(addr); | |
77 } | |
78 }; | |
79 | |
80 } } // namespace v8::internal | |
81 | |
82 #endif // V8_MEMORY_H_ | |
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