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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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| 127 Segment* segment_head_; | 127 Segment* segment_head_; |
| 128 Isolate* isolate_; | 128 Isolate* isolate_; |
| 129 }; | 129 }; |
| 130 | 130 |
| 131 | 131 |
| 132 // ZoneObject is an abstraction that helps define classes of objects | 132 // ZoneObject is an abstraction that helps define classes of objects |
| 133 // allocated in the Zone. Use it as a base class; see ast.h. | 133 // allocated in the Zone. Use it as a base class; see ast.h. |
| 134 class ZoneObject { | 134 class ZoneObject { |
| 135 public: | 135 public: |
| 136 // Allocate a new ZoneObject of 'size' bytes in the Zone. | 136 // Allocate a new ZoneObject of 'size' bytes in the Zone. |
| 137 inline void* operator new(size_t size); | 137 INLINE(void* operator new(size_t size)); |
| 138 inline void* operator new(size_t size, Zone* zone); | 138 INLINE(void* operator new(size_t size, Zone* zone)); |
| 139 | 139 |
| 140 // Ideally, the delete operator should be private instead of | 140 // Ideally, the delete operator should be private instead of |
| 141 // public, but unfortunately the compiler sometimes synthesizes | 141 // public, but unfortunately the compiler sometimes synthesizes |
| 142 // (unused) destructors for classes derived from ZoneObject, which | 142 // (unused) destructors for classes derived from ZoneObject, which |
| 143 // require the operator to be visible. MSVC requires the delete | 143 // require the operator to be visible. MSVC requires the delete |
| 144 // operator to be public. | 144 // operator to be public. |
| 145 | 145 |
| 146 // ZoneObjects should never be deleted individually; use | 146 // ZoneObjects should never be deleted individually; use |
| 147 // Zone::DeleteAll() to delete all zone objects in one go. | 147 // Zone::DeleteAll() to delete all zone objects in one go. |
| 148 void operator delete(void*, size_t) { UNREACHABLE(); } | 148 void operator delete(void*, size_t) { UNREACHABLE(); } |
| 149 }; | 149 }; |
| 150 | 150 |
| 151 | 151 |
| 152 class AssertNoZoneAllocation { | 152 class AssertNoZoneAllocation { |
| 153 public: | 153 public: |
| 154 inline AssertNoZoneAllocation(); | 154 inline AssertNoZoneAllocation(); |
| 155 inline ~AssertNoZoneAllocation(); | 155 inline ~AssertNoZoneAllocation(); |
| 156 private: | 156 private: |
| 157 bool prev_; | 157 bool prev_; |
| 158 }; | 158 }; |
| 159 | 159 |
| 160 | 160 |
| 161 // The ZoneListAllocationPolicy is used to specialize the GenericList | 161 // The ZoneListAllocationPolicy is used to specialize the GenericList |
| 162 // implementation to allocate ZoneLists and their elements in the | 162 // implementation to allocate ZoneLists and their elements in the |
| 163 // Zone. | 163 // Zone. |
| 164 class ZoneListAllocationPolicy { | 164 class ZoneListAllocationPolicy { |
| 165 public: | 165 public: |
| 166 // Allocate 'size' bytes of memory in the zone. | 166 // Allocate 'size' bytes of memory in the zone. |
| 167 static inline void* New(int size); | 167 INLINE(static void* New(int size)); |
| 168 | 168 |
| 169 // De-allocation attempts are silently ignored. | 169 // De-allocation attempts are silently ignored. |
| 170 static void Delete(void* p) { } | 170 static void Delete(void* p) { } |
| 171 }; | 171 }; |
| 172 | 172 |
| 173 | 173 |
| 174 // ZoneLists are growable lists with constant-time access to the | 174 // ZoneLists are growable lists with constant-time access to the |
| 175 // elements. The list itself and all its elements are allocated in the | 175 // elements. The list itself and all its elements are allocated in the |
| 176 // Zone. ZoneLists cannot be deleted individually; you can delete all | 176 // Zone. ZoneLists cannot be deleted individually; you can delete all |
| 177 // objects in the Zone by calling Zone::DeleteAll(). | 177 // objects in the Zone by calling Zone::DeleteAll(). |
| 178 template<typename T> | 178 template<typename T> |
| 179 class ZoneList: public List<T, ZoneListAllocationPolicy> { | 179 class ZoneList: public List<T, ZoneListAllocationPolicy> { |
| 180 public: | 180 public: |
| 181 inline void* operator new(size_t size); | 181 INLINE(void* operator new(size_t size)); |
| 182 inline void* operator new(size_t size, Zone* zone); | 182 INLINE(void* operator new(size_t size, Zone* zone)); |
| 183 | 183 |
| 184 // Construct a new ZoneList with the given capacity; the length is | 184 // Construct a new ZoneList with the given capacity; the length is |
| 185 // always zero. The capacity must be non-negative. | 185 // always zero. The capacity must be non-negative. |
| 186 explicit ZoneList(int capacity) | 186 explicit ZoneList(int capacity) |
| 187 : List<T, ZoneListAllocationPolicy>(capacity) { } | 187 : List<T, ZoneListAllocationPolicy>(capacity) { } |
| 188 | 188 |
| 189 // Construct a new ZoneList by copying the elements of the given ZoneList. | 189 // Construct a new ZoneList by copying the elements of the given ZoneList. |
| 190 explicit ZoneList(const ZoneList<T>& other) | 190 explicit ZoneList(const ZoneList<T>& other) |
| 191 : List<T, ZoneListAllocationPolicy>(other.length()) { | 191 : List<T, ZoneListAllocationPolicy>(other.length()) { |
| 192 AddAll(other); | 192 AddAll(other); |
| 193 } | 193 } |
| 194 }; | 194 }; |
| 195 | 195 |
| 196 | 196 |
| 197 // Introduce a convenience type for zone lists of map handles. | 197 // Introduce a convenience type for zone lists of map handles. |
| 198 typedef ZoneList<Handle<Map> > ZoneMapList; | 198 typedef ZoneList<Handle<Map> > ZoneMapList; |
| 199 | 199 |
| 200 | 200 |
| 201 // ZoneScopes keep track of the current parsing and compilation | 201 // ZoneScopes keep track of the current parsing and compilation |
| 202 // nesting and cleans up generated ASTs in the Zone when exiting the | 202 // nesting and cleans up generated ASTs in the Zone when exiting the |
| 203 // outer-most scope. | 203 // outer-most scope. |
| 204 class ZoneScope BASE_EMBEDDED { | 204 class ZoneScope BASE_EMBEDDED { |
| 205 public: | 205 public: |
| 206 // TODO(isolates): pass isolate pointer here. | 206 INLINE(ZoneScope(Isolate* isolate, ZoneScopeMode mode)); |
| 207 inline explicit ZoneScope(ZoneScopeMode mode); | |
| 208 | 207 |
| 209 virtual ~ZoneScope(); | 208 virtual ~ZoneScope(); |
| 210 | 209 |
| 211 inline bool ShouldDeleteOnExit(); | 210 inline bool ShouldDeleteOnExit(); |
| 212 | 211 |
| 213 // For ZoneScopes that do not delete on exit by default, call this | 212 // For ZoneScopes that do not delete on exit by default, call this |
| 214 // method to request deletion on exit. | 213 // method to request deletion on exit. |
| 215 void DeleteOnExit() { | 214 void DeleteOnExit() { |
| 216 mode_ = DELETE_ON_EXIT; | 215 mode_ = DELETE_ON_EXIT; |
| 217 } | 216 } |
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| 232 public: | 231 public: |
| 233 ZoneSplayTree() | 232 ZoneSplayTree() |
| 234 : SplayTree<Config, ZoneListAllocationPolicy>() {} | 233 : SplayTree<Config, ZoneListAllocationPolicy>() {} |
| 235 ~ZoneSplayTree(); | 234 ~ZoneSplayTree(); |
| 236 }; | 235 }; |
| 237 | 236 |
| 238 | 237 |
| 239 } } // namespace v8::internal | 238 } } // namespace v8::internal |
| 240 | 239 |
| 241 #endif // V8_ZONE_H_ | 240 #endif // V8_ZONE_H_ |
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