13ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch// Copyright 2011 the V8 project authors. All rights reserved. 2a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Redistribution and use in source and binary forms, with or without 3a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// modification, are permitted provided that the following conditions are 4a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// met: 5a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// 6a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Redistributions of source code must retain the above copyright 7a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// notice, this list of conditions and the following disclaimer. 8a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Redistributions in binary form must reproduce the above 9a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// copyright notice, this list of conditions and the following 10a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// disclaimer in the documentation and/or other materials provided 11a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// with the distribution. 12a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Neither the name of Google Inc. nor the names of its 13a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// contributors may be used to endorse or promote products derived 14a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// from this software without specific prior written permission. 15a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// 16a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 28a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#ifndef V8_MEMORY_H_ 29a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#define V8_MEMORY_H_ 30a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 31a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blocknamespace v8 { 32a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blocknamespace internal { 33a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 34a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Memory provides an interface to 'raw' memory. It encapsulates the casts 35a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// that typically are needed when incompatible pointer types are used. 36a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 37a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockclass Memory { 38a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block public: 3980d68eab642096c1a48b6474d6ec33064b0ad1f5Kristian Monsen static uint8_t& uint8_at(Address addr) { 4080d68eab642096c1a48b6474d6ec33064b0ad1f5Kristian Monsen return *reinterpret_cast<uint8_t*>(addr); 4180d68eab642096c1a48b6474d6ec33064b0ad1f5Kristian Monsen } 4280d68eab642096c1a48b6474d6ec33064b0ad1f5Kristian Monsen 43a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static uint16_t& uint16_at(Address addr) { 44a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block return *reinterpret_cast<uint16_t*>(addr); 45a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 46a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 47a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static uint32_t& uint32_at(Address addr) { 48a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block return *reinterpret_cast<uint32_t*>(addr); 49a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 50a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 51a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static int32_t& int32_at(Address addr) { 52a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block return *reinterpret_cast<int32_t*>(addr); 53a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 54a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 55a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static uint64_t& uint64_at(Address addr) { 56a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block return *reinterpret_cast<uint64_t*>(addr); 57a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 58a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 59a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static int& int_at(Address addr) { 60a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block return *reinterpret_cast<int*>(addr); 61a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 62a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 633ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch static unsigned& unsigned_at(Address addr) { 643ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch return *reinterpret_cast<unsigned*>(addr); 653ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch } 663ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch 67b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch static double& double_at(Address addr) { 68b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch return *reinterpret_cast<double*>(addr); 69b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch } 70b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 71a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static Address& Address_at(Address addr) { 72a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block return *reinterpret_cast<Address*>(addr); 73a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 74a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 75a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static Object*& Object_at(Address addr) { 76a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block return *reinterpret_cast<Object**>(addr); 77a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 783ce2e2076e8e3e60cf1810eec160ea2d8557e9e7Steve Block 793ce2e2076e8e3e60cf1810eec160ea2d8557e9e7Steve Block static Handle<Object>& Object_Handle_at(Address addr) { 803ce2e2076e8e3e60cf1810eec160ea2d8557e9e7Steve Block return *reinterpret_cast<Handle<Object>*>(addr); 813ce2e2076e8e3e60cf1810eec160ea2d8557e9e7Steve Block } 82a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}; 83a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 84a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} } // namespace v8::internal 85a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 86a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif // V8_MEMORY_H_ 87