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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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