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Issue 7054072: Refactor storage of global handles. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 9 years, 6 months ago
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1 // Copyright 2011 the V8 project authors. All rights reserved. 1 // Copyright 2011 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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195 return static_cast<int>(length); 195 return static_cast<int>(length);
196 } 196 }
197 197
198 198
199 // ---------------------------------------------------------------------------- 199 // ----------------------------------------------------------------------------
200 // BitField is a help template for encoding and decode bitfield with 200 // BitField is a help template for encoding and decode bitfield with
201 // unsigned content. 201 // unsigned content.
202 template<class T, int shift, int size> 202 template<class T, int shift, int size>
203 class BitField { 203 class BitField {
204 public: 204 public:
205 typedef T ValueType;
Vyacheslav Egorov (Chromium) 2011/06/06 12:59:22 I did not find place where it is used.
Vitaly Repeshko 2011/06/06 15:19:43 Oops, this got in from another change.
206
205 // Tells whether the provided value fits into the bit field. 207 // Tells whether the provided value fits into the bit field.
206 static bool is_valid(T value) { 208 static bool is_valid(T value) {
207 return (static_cast<uint32_t>(value) & ~((1U << (size)) - 1)) == 0; 209 return (static_cast<uint32_t>(value) & ~((1U << (size)) - 1)) == 0;
208 } 210 }
209 211
210 // Returns a uint32_t mask of bit field. 212 // Returns a uint32_t mask of bit field.
211 static uint32_t mask() { 213 static uint32_t mask() {
212 // To use all bits of a uint32 in a bitfield without compiler warnings we 214 // To use all bits of a uint32 in a bitfield without compiler warnings we
213 // have to compute 2^32 without using a shift count of 32. 215 // have to compute 2^32 without using a shift count of 32.
214 return ((1U << shift) << size) - (1U << shift); 216 return ((1U << shift) << size) - (1U << shift);
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789 INLINE(Dest BitCast(const Source& source)); 791 INLINE(Dest BitCast(const Source& source));
790 792
791 template <class Dest, class Source> 793 template <class Dest, class Source>
792 inline Dest BitCast(const Source& source) { 794 inline Dest BitCast(const Source& source) {
793 return BitCastHelper<Dest, Source>::cast(source); 795 return BitCastHelper<Dest, Source>::cast(source);
794 } 796 }
795 797
796 } } // namespace v8::internal 798 } } // namespace v8::internal
797 799
798 #endif // V8_UTILS_H_ 800 #endif // V8_UTILS_H_
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