1 // Copyright 2011 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 unsigned& unsigned_at(Address addr) { 64 return *reinterpret_cast<unsigned*>(addr); 65 } 66 67 static double& double_at(Address addr) { 68 return *reinterpret_cast<double*>(addr); 69 } 70 71 static Address& Address_at(Address addr) { 72 return *reinterpret_cast<Address*>(addr); 73 } 74 75 static Object*& Object_at(Address addr) { 76 return *reinterpret_cast<Object**>(addr); 77 } 78 79 static Handle<Object>& Object_Handle_at(Address addr) { 80 return *reinterpret_cast<Handle<Object>*>(addr); 81 } 82 }; 83 84 } } // namespace v8::internal 85 86 #endif // V8_MEMORY_H_ 87
