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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 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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173 | 173 |
174 // ZoneScopes keep track of the current parsing and compilation | 174 // ZoneScopes keep track of the current parsing and compilation |
175 // nesting and cleans up generated ASTs in the Zone when exiting the | 175 // nesting and cleans up generated ASTs in the Zone when exiting the |
176 // outer-most scope. | 176 // outer-most scope. |
177 class ZoneScope BASE_EMBEDDED { | 177 class ZoneScope BASE_EMBEDDED { |
178 public: | 178 public: |
179 explicit ZoneScope(ZoneScopeMode mode) : mode_(mode) { | 179 explicit ZoneScope(ZoneScopeMode mode) : mode_(mode) { |
180 nesting_++; | 180 nesting_++; |
181 } | 181 } |
182 | 182 |
183 ~ZoneScope() { | 183 virtual ~ZoneScope() { |
184 if (--nesting_ == 0 && mode_ == DELETE_ON_EXIT) Zone::DeleteAll(); | 184 if (ShouldDeleteOnExit()) Zone::DeleteAll(); |
| 185 --nesting_; |
| 186 } |
| 187 |
| 188 bool ShouldDeleteOnExit() { |
| 189 return nesting_ == 1 && mode_ == DELETE_ON_EXIT; |
185 } | 190 } |
186 | 191 |
187 // For ZoneScopes that do not delete on exit by default, call this | 192 // For ZoneScopes that do not delete on exit by default, call this |
188 // method to request deletion on exit. | 193 // method to request deletion on exit. |
189 void DeleteOnExit() { | 194 void DeleteOnExit() { |
190 mode_ = DELETE_ON_EXIT; | 195 mode_ = DELETE_ON_EXIT; |
191 } | 196 } |
192 | 197 |
193 static int nesting() { return nesting_; } | 198 static int nesting() { return nesting_; } |
194 | 199 |
195 private: | 200 private: |
196 ZoneScopeMode mode_; | 201 ZoneScopeMode mode_; |
197 static int nesting_; | 202 static int nesting_; |
198 }; | 203 }; |
199 | 204 |
200 | 205 |
201 } } // namespace v8::internal | 206 } } // namespace v8::internal |
202 | 207 |
203 #endif // V8_ZONE_H_ | 208 #endif // V8_ZONE_H_ |
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